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Gates

Gates in hydroelectric systems can be sectioned or un-sectioned, with sectioned gates like stoplogs used for flow control and maintenance. The design and operation of gates depend on their location and function, with various types such as bulkhead gates and turbine wicket gates serving specific purposes. Additionally, other gate types like Miter and Vertical Sector gates are utilized in navigation locks and tidal developments, which are not typically found in hydroelectric projects.

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Dheeraj Thakur
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36 views1 page

Gates

Gates in hydroelectric systems can be sectioned or un-sectioned, with sectioned gates like stoplogs used for flow control and maintenance. The design and operation of gates depend on their location and function, with various types such as bulkhead gates and turbine wicket gates serving specific purposes. Additionally, other gate types like Miter and Vertical Sector gates are utilized in navigation locks and tidal developments, which are not typically found in hydroelectric projects.

Uploaded by

Dheeraj Thakur
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© © All Rights Reserved
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Gates may be sectioned or un-sectioned.

Sectioned gates consists of sub-assemblies

that are erected piece-meal when needed with stoplogs as a prime example. Stoplogs

may be used as a means to block a discharge opening, with the individual stoplogs

removed one piece at a time when flow must be released. Bulkhead gates are not a

true type of gate but rather a classifying use of gate (as are the gates classified for use

as intake, draft tube, spillway). Bulkhead gates and stoplogs are normally lifted

vertically installed under no flow conditions for maintenance or emergency use,

They often spend most of their life cycle in storage rather than in service. The

location and function of a gate determines its design, method of operation, and

service life.

The powerhouse usually contains gates or valves to control flow to the turbine, from

the intake, and may have headgates and draft tube gates for turbine dewatering and

maintenance purposes. In addition, the hydroelectric turbine may also contain wicket

gates, which are not "gates" in the sense of the types of gates used on a dam. Turbine

wicket gates are actually more closely related to a valve than a gate, as they have

seating and supports and are located in a pressurized conduit. The turbine wicket

gates are similar to the wicket gates identified in Table C-l, although the wicket gates

used in a dam are operated under low heads (less than 30 feet) whereas turbine wicket

gates can operate under heads that may exceed 1,000 feet.

Some of the gates listed in Table C-l may be used at navigation locks and dams, or

on tidal developments that include hydroelectric generation. Lock and dams, and tidal

projects also utilize gates, such as the Miter, Vertical Sector, and Buoyant Flap gates

that are not commonly associated with, or found at hydroelectric projects. Gates not

commonly used at hydroelectric projects have not been addressed specifically in these

guidelines.

Gate hoists are the mechanical

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