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US 4,278,619 AGranted
Steam throttle valve
AssigneeSulzer Brothers Limited
InventorEdelbert Tiefenthaler
Life of this patent
Estimating the term…
Abstract
The steam throttle valve has a number of water injection ducts distributed around the valve axis within a thin-walled hollow member which extends around the valve axis. A thin-walled water supply duct in a bore in the valve casing cover supplies water to the hollow member. The member is annular and is retained between two assembled parts of the valve, namely the cover and a valve cage. Constructing the ducts in this way obviates thermal stress cracking near them.
Claims9
A steam throttle valve comprising
- a valve body having a steam inlet port and a throttle cross-section disposed on a valve axis downstream of said inlet port;
- a valve spindle guide disposed on said valve axis;
- a perforated valve cage disposed on said axis downstream of said throttle cross-section and concentrically about said spindle guide to define a flow chamber therebetween;
- a thin-walled hollow member between said valve cage and said spindle guide and having injection ducts for directing cooling water into said flow chamber;
- and
- a thin-walled water supply duct in said body for receiving cooling water and being in communication with said hollow member to deliver cooling water into said hollow member for injection into said flow chamber.
3 more elements
Dependencies are inferred from the claim text.