Full flow mechanical fail safe
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United States of America Patent
Stats
-
Dec 2, 2003
Grant Date -
Sep 19, 2002
app pub date -
Mar 1, 2002
filing date -
Sep 13, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A full-flow mechanical failsafe is composed of a cylindrical shell having a movable sealing plug therein, for attachment to a reaction tube of a fluid treatment system, such as a gas clean up system in a power plant. The sealing plug rests on locking spheres within the shell during normal operation. Upon reaction tube failure or breakage, the flow of fluid will be substantially increased, causing an increase in upward pressure against the sealing plug, forcing it upward off the spheres and into a sealing contact with a flow aperture, shutting off fluid flow. The spheres move downward into a locking position upon movement of the sealing plug, to secure the sealing plug in its upward sealing position. The failsafe can be used in fluid flow control systems other than fluid filtering systems, such as oil or gas pipelines, and can be used to prevent improper reverse fluid flow.
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