US 4,018,089 AGranted

Fluid sampling apparatus

AssigneeBeckman Instruments, Inc.

InventorsGregory Dzula, Melvin Levine, Elmer Ambrose Sperry, III

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Abstract

Improved apparatus for bringing a fluid in a process stream in contact with a sensor is disclosed. The present invention uses the kinetic energy of the process fluid to convey some of the fluid to and from the sensor, as opposed to the prior art practice of inserting the sensor itself into the process fluid stream. A nozzle is placed into the process fluid stream facing into the direction of flow. A small portion of the flowing process fluid is trapped by the nozzle and some of its kinetic energy is converted to pressure. This pressure causes a flow from the nozzle into a conduit through an open valve to the sensor. The fluid continues past the sensor and returns to the process fluid stream through the same valve. In one embodiment, the path for incoming fluid and exiting fluid are separate paths. In a second embodiment, the incoming fluid and exiting fluid exist coaxially.

Claims10

Dependent claims

Improved insertion type sampling apparatus for sampling a moving fluid in a main conduit comprising:

a. a body adapted to be mounted on the main conduit and having a first opening and a second opening into the interior of the main conduit, said body further having a passageway therein communicating on one end with said first opening and communicating on the other end with said second opening whereby fluid can enter said passageway from said main conduit through one of said openings, flow through said passageway and re-enter the fluid in the main conduit through the other of said openings, the portion of said passageway up to said means for holding a sensor and the portion of said passageway after said means for holding a sensor being a pair of conduits one within the other;
b. first nozzle means connected to said first opening and being disposed with an opening in the moving fluid whereby the kinetic energy of the moving fluid will force a portion of the fluid through said passageway;
c. valve means operably attached to said body and being adapted to open and close said passageway in two locations with one movable actuator;
and,
d. means for holding a sensor disposed between said two locations of valve opening and closing in said passageway and being so shaped and positioned that when said valve means is in the open position a portion of the fluid passing through said passageway will contact a sensor held by said holding means.

2 more elements

Improved insertion type sampling apparatus for sampling a moving fluid in a main conduit comprising:

a. an outer conduit adapted on one end for mounting through the wall of the main conduit;
b. means for holding a sensor disposed on the other end of said outer conduit, said sensor holding means being adapted to close said other end of said outer conduit and hold a sensor disposed inside said outer conduit;
c. valve means operably connected in said outer conduit between said end mounted through the wall of the main conduit and said sensor holding means;
d. a first inner conduit disposed within said outer conduit and extending from adjacent said valve means on one end to the main conduit on the other end, said inner conduit being positioned to direct fluid emerging from said end adjacent said valve means across a sensor being held by said sensor holding means;
and,
f. first nozzle means connected to said end of said first inner conduit adjacent the main conduit and being disposed with an opening facing into the moving fluid whereby the kinetic energy of the moving fluid will force a portion of the fluid into said first inner conduit.

3 more elements

Dependencies are inferred from the claim text.