Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition
Patent
1996-10-18
1998-04-21
Cain, Edward J.
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
G01N 112
Patent
active
057414645
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a sampling valve. More particularly, the invention is concerned with a valve intended for use with gauging sampling tapes, and which can be used with a sampler device.
BACKGROUND ART
The prior art uses a sampling device which includes a sampler tube having an internal ball to sample a fluid or liquid. The sampler tube is conventionally lowered into a fluid or liquid, and the internal ball which closes off a bottom opening of the sampler tube rises in response to fluid or liquid pressure and allows the fluid or liquid to fill the sampler tube as the tube is lowered into the fluid or liquid product.
While it is preferred to use the sampler tube with a liquid, it is also possible to use it with all types of fluids. The sampling valve of the invention is primarily intended for use in connection with liquid handling.
Specifically, the ball itself does not float on the fluid or the liquid when a fluid or liquid is used respectively, but the ball is weighted so that, as the tube descends, into the fluid or liquid, the fluid or liquid raises the ball sufficiently so that the fluid or liquid can-pass-by the ball between the ball and the inner wall of the sampler tube. After entry of the sampler tube into the fluid or liquid for a predetermined distance, the sampling procedure is then stopped, and the ball drops down through the fluid or liquid in the sampler tube and seals the bottom of the tube to prevent any further entry of fluid or liquid into the sampler tube or exiting of the fluid or liquid from the sampler tube. In effect, the ball acts as a check valve.
Sample mechanisms to sample a fluid or a liquid are well known. One example of a prior art sampler mechanism is a sampler tube of the aforesaid type.
However, using the prior art sampler tube can produce a mess because, after the sample is taken, it then becomes necessary to drain the sample, if it is a liquid, into an open container by manually moving the ball away from the bottom of the sampler tube closure formed by the ball and bottom of the tube and allow the liquid to pour freely into an open container. If a fluid is used, perhaps another means of egress is to be used.
Another problem with the prior art sampler tube is the possibility of damage to the health of individuals using the sampler tube due to exposure to irritating liquid as well as other toxic materials vapor.
The sampling devices are generally known as zone samplers. For example, the one-liter sampler is used for use in a four-inch S valve, and there are half-liter samplers also.
DISCLOSURE OF THE INVENTION
A principle object of the present invention is to remove the liquid from the sampling tube in a more elegant manner and to eliminate any mess due to a pouring of the liquid from the sampling tube.
A further object of the invention is to provide a sampling valve having a rotatable ball in conjunction with the sampling tube.
Another object of the invention is to provide a sampling tube ball in the sampling tube which functions both as a part of a sampling valve for withdrawal of a sample of the liquid from the sampling tube and as a part of a closure for the sampling tube.
A feature of the invention is the elimination of a manual draining of the sampling tube and to facilitate collection of the sample.
Another feature of the invention is that a user's exposure to possible irritating liquid vapor is greatly minimized.
A further object of the invention is to provide a sampling port connected with the sampling tube.
One embodiment of the invention proposes the use of a spring-loaded button forming a part of the rotatable ball of the sampling valve and for movement of the sampling tube ball to permit exit of the sample liquid from the sampling tube.
The spring-loaded button is one feature which is built into the rotatable ball of the sampling valve of what would otherwise be a standard construction ball valve, and it is this spring-loaded button that pushes the sampler tube ball up into the sampler tube to permit the liquid or fluid to exit thr
REFERENCES:
patent: 4590810 (1986-05-01), Hunkin
Cain Edward J.
MMC International Corp.
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