Steam valve
OwnerToshinari NISHIMURAinventor
Life of this patent
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Abstract
It is intended to provide a steam valve, which can reduce vibrations of each part of the steam valve, can suppress pressure loss and can cut off the steam rapidly. The steam valve 1 changes an area of a flow path between the valve seat 4 and the valve body 2 and adjusts a flow of steam passing through the flow path by moving the valve body 2 relative to the valve seat 4. The valve body 2 satisfies a relationship of r>0.6D0, where r is a curvature radius of the valve head portion 2A and D0 is a seat diameter of the valve seat 4. A tapered portion 2B is provided on an upstream side of the valve head portion 2A and its surface is tilted toward a direction of relative movement of the valve body 2 to the valve seat 4 more than that of the valve head portion 2A.
Claims6
A steam valve comprising:
- a valve seat;
- and
- a valve body which moves relative to the valve seat so as to change an area of a flow path between the valve seat and the valve body and regulate a flow of a steam passing through the flow path,
- wherein the valve body comprises:
- a valve head portion which comes in contact with the valve seat and satisfies a relationship of r>0.6D0, where r is a curvature radius of the valve head portion and D0 is a seat diameter of the valve seat;
- and
- a tapered portion which is arranged on an upstream side of the valve head portion and whose surface is tilted toward a direction of relative movement of the valve body to the valve seat more than that of the valve head portion.
Dependencies are inferred from the claim text.