Autokinetic sampling nozzle
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorCharles H. Frampton
Life of this patent
Estimating the term…
Abstract
A sampling nozzle is disclosed which includes an inlet valve that automatlly adjusts the opening thereof in predetermined inverse porportions to the pressures applied thereto by the fluid and/or other substances being sampled thereby. Whenever a constant pressure suction pump is effectively connected to the outlet thereof, isokinetic sampling is achieved within a system of varying velocities of the aforesaid fluid and/or other substances and, thus, a substantially fixed sampling rate is maintained with respect thereto.
Claims15
An autokinetic fluid sampling device, comprising in combination:
- duct means having an open fluid inlet at one end thereof and an open fluid outlet at the other end thereof;
- means connected to said duct means for effectively varying the area of the open fluid inlet thereof in predetermined inverse proportion to the velocity of the flowing fluid being sampled in automatic response to the impact of said flowing fluid thereon;
- and
- adjustable means effectively connected to said duct means adapted for timely engagement with said fluid inlet varying means in such manner as to limit the maximum area of the aforesaid open fluid inlet, said adjustable means including an elongated arm having a lower extending lip connected to the extremity thereof that is adjacent to said fluid inlet varying means, and a slotted extension connected to the extremity thereof that is opposite the one to which said lower extending lip is connected;
- a threaded hole located in the aforesaid duct means;
- and a threaded set screw extending through the slot of the slotted extension of said elongated arm and screwed to the aforesaid threaded hole, so as to firmly hold said elongated arm in a predetermined disposition with respect to said duct means and the aforesaid fluid inlet varying means.
An autokinetic nozzle adapted for sampling at a constant rate from within a pipe a flowing fluid containing solid particulate matter, the velocities of which vary from time to time, comprising in combination:
- duct means having an open fluid inlet at one end thereof and an open fluid outlet at the other end thereof;
- suction pump means connected to the open fluid outlet of said duct means for effecting a substantially constant fluid pressure thereat which is less than the fluid pressure within said duct means;
- valve means effectively connected to the open inlet end of said duct means for effectively varying the size of said open fluid inlet in such manner automatically in response to the composite of the forces applied thereto by the fluid flowing within the aforesaid pipe as to close said autokinetic nozzle to sample said flowing fluid at a substantially constant rate that is equal to the suction rate of the aforesaid suction pump means, regardless of the fluctuations of the velocities of the fluid flowing within said pipe.
The autokinetic system for sampling flowing substances from within a container, wherein the velocities thereof fluctuate from time to time, comprising in combination:
- a container within which substances flow;
- an open-ended duct having an affluent end into which a sample of the aforesaid substances flow and an effluent end out of which said sample of substances flow, said open-ended duct being mounted within said container in such manner as to partially extend through the wall thereof;
- first valve means effectively connected to the affluent end of said open-ended duct means for effectively varying the area of the open affluent end thereof in a predetermined manner and in predetermined response to forces applied thereto by the aforesaid flowing substances;
- second valve means effectively connected to the affluent end of said open-ended duct means for effectively varying the area of the open affluent end thereof not varied by said first valve means in a predetermined manner and in predetermined response to forces applied thereto by the aforesaid flowing substances;
- first resilient means interconnecting said duct and said first valve means for the urging of said first valve means toward an open position in accordance with a first predetermined resiliency rate;
- second resilient means interconnecting said duct and said second valve means for the urging of said second valve means toward an open position in accordance with a second predetermined resiliency rate;
- first stop means adjustably connected to said duct and adapted to timely contact said first valve means in such manner as to limit the maximum open position thereof;
- second stop means adjustably connected to said duct and adapted to timely contact said second valve means in such manner as to limit the maximum open position thereof;
- and
- means effectively connected to the effluent end of the aforesaid open-ended duct for creating a pressure thereat which is less than the pressure within the aforesaid container.
Dependencies are inferred from the claim text.