Agitating – Agitator – Stirrer
Patent
1990-05-29
1992-09-22
Coe, Philip R.
Agitating
Agitator
Stirrer
366265, B01F 722
Patent
active
051491958
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an agitator or like vortex generator of the kind comprising a vessel which has provided in the upper part thereof an intake for introducing a moving medium into the vessel and in the bottom part thereof a plurality of rotatable guide devices from the vessel effective in guiding and discharging the downcoming medium from the vessel.
BACKGROUND PRIOR ART
Agitators intended for the preparation of mixtures, solutions, emulsions etc. are known to the art, for instance from Austrian Patent Specification 265 991. These known apparatus are used, for instance, to prepare beverages, purify water or for various kinds of biological processes. The apparatus may comprise an egg-shaped reaction vessel which accommodates the liquid to be processed. Arranged in the lower parts of the vessel is a single-blade or multi-blade device which is driven from beneath the vessel, while arranged in the upper part of the vessel is an inlet opening for the introduction of secondary solid, liquid or gaseous additive substances into the vessel.
One problem with such apparatus and other, similar apparatus is that they generate turbulent flows which move in mutually different directions and therewith counteract the generation of a desired natural vortex, a problem which can only barely be solved and then at the price of a higher energy input. No optimal solution has hitherto been proposed, however.
The object of the present invention is, inter alia, to eliminate the aforesaid drawbacks in a rational, energy-lean and therewith environmentally friendly manner, by isolating any possible turbulent liquid movement from a vortex which is engendered naturally in regions above the rotatable device, provided that no disturbances are conducted upwardly towards the centre of the vortex. This will also result in all of the liquid mass accompanying the rotational movement. By vortex is meant here all manner of ordered movement of fluid particles which will generate a central vacuum and therewith a downward suction force.
SUMMARY OF THE INVENTION
Accordingly, the invention relates to an agitator of the aforedescribed kind which is mainly characterized in that the inner defining surface of the vessel has a hyperbolic, conical and rotational-symmetrical shape, in that the intake has a cross-sectional area which increases progressively towards the guide devices, and in that the guide devices have the form of vanes or like guide devices which extend towards the periphery of the vessel and which are mounted on a horizontal, rotatable bottom plate which is driven from beneath.
Other characteristic features of an inventive agitator are set forth in the accompanying claims.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in more detail with reference to the accompanying schematic drawings, in which
FIG. 1 is a side view of an inventive agitator,
FIG. 2 is a highly schematic plan view illustrating the configuration of the guide vanes of an alternative agitator,
FIG. 3 is a detail view of the upper part of the agitator,
FIG. 4 illustrates an inventive agitator which is totally enclosed in an egg-shaped container, and
FIG. 5 illustrates an agitator arranged in a free-surface body of water and co-acting with a parabolic, outwardly open rotational body.
DESCRIPTION OF PREFERRED EMBODIMENTS
The agitator illustrated in FIG. 1 includes a hyperbolic conical and rotational-symmetrical vessel 10, the inner and outer defining surfaces of which each have the shape illustrated. Located in the upper part of the vessel is an intake 101 through which a medium, such as water, blood, gas, etc., is introduced into the vessel and the cross-sectional area of which increases progressively in a downward direction.
Arranged beneath the vessel 10 is a horizontal, rotatably driven plate 11, said plate being driven from beneath. The plate has disposed thereon guide vanes or like devices 12 which are effective in guiding the moving medium arriving from above and discharging said medium from the vessel. The
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patent: 2530814 (1950-11-01), Becze
patent: 3147957 (1964-09-01), Martin
patent: 3339897 (1967-09-01), Davis, Jr.
patent: 3479017 (1969-11-01), Thikotter
patent: 4664530 (1987-05-01), Kurome et al.
patent: 4893941 (1990-06-01), Wayte
Coe Philip R.
Soohoo Tony
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