초록 ▼

An apparatus for inserting a venturi tube having an inlet, an aspirator inlet and an outlet directly within a fluid flow stream, with the aspirator inlet not in contact with the fluid flow stream is disclosed. A plate having a first aperture leading to the venturi inlet, and a series of second apert

An apparatus for inserting a venturi tube having an inlet, an aspirator inlet and an outlet directly within a fluid flow stream, with the aspirator inlet not in contact with the fluid flow stream is disclosed. A plate having a first aperture leading to the venturi inlet, and a series of second apertures both supports the venturi within a conduit and divides the fluid flow stream into a first stream which flows through the venturi tube and a second stream which flows around the venturi tube. A variety of adjusting mechanisms are disclosed for varying the cross sectional area of the second apertures relative to the cross sectional area of the venturi tube. The apparatus is adapted to allow the back pressure within the venturi tube (which increases as the fluid flow rate increases) to force an increasing proportion of the flow stream to flow around the venturi tube in order to maintain a relatively constant aspiration rate within the venturi tube. The adjustment mechanisms disclosed include a second plate, similar to the first plate, which is manually rotated and a blocking ring which moves responsive to changes in rate of flow of the fluid flow stream.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.]1. In a process for introducing into a first fluid a second fluid, comprising introducing a first fluid into an inlet of a venturi tube, and introducing into said first fluid throug

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.]1. In a process for introducing into a first fluid a second fluid, comprising introducing a first fluid into an inlet of a venturi tube, and introducing into said first fluid through an aspirator inlet which opens into said venturi tube a second fluid, thereby allowing said second fluid to be introduced into said first fluid as said first fluid flows through said venturi tube, the improvement comprising use in said process of an apparatus for use within a conduit for a fluid flow stream comprising:a venturi tube having an inlet, an aspirator inlet and an outlet;supporting means for supporting said venturi tube within said conduit in such a manner that said venturi tube is aligned axially in the direction of said fluid flow stream;fluid flow control means, comprising first passage means for allowing a first stream to flow and second passage means for allowing a second stream to flow for dividing said fluid flow stream into said first stream which flows through said venturi tube and said second stream which flows axially around said venturi tube, respectively; andvortex inducing means in said second passage means for inducing net axially symmetric vorticity in said fluid flow stream.