Eductor wand for bulk particulate materials

Details Eductor wand for bulk particulate materials Eductor wand for bulk particulate materials

1999-12-15

2001-07-03

Skaggs, H. Grant (Department: 3651)

Conveyors: fluid current

Intake to fluid current conveyor

Conveyor having plural intakes

C406S113000, C406S153000

Reexamination Certificate

active

06254315

ABSTRACT:

This invention relates to an eductor wand for unloading bulk particulate materials from various containers such as bags and drums utilizing a conventional source of compressed gas typically available in plant facilities as a motive gas.
BACKGROUND OF THE INVENTION
In the chemical processing and other industries, many bulk particulate materials often are transported in bags, drums and other portable containers which often are required to be unloaded and transferred into conveying systems, reactor vessels or storage vessels. Such unloading and transferring commonly is performed manually or with the aid of various lifting and dumping devices. In either instance, physical manual effort is required which has its limitations and often spillage of material occurs. In some plant facilities where a vacuum pump may be available and convenient, various vacuum devices may be used for unloading such materials and recovering any spillage of the materials. An example of one of such devices is illustrated and described in U.S. Pat. No. 5,769,572.
Many plant facilities are neither equipped nor have conveniently available vacuum pumps required for such prior art vacuuming devices. Such facilities, however, usually are equipped with a source of compressed air which may be utilized to provide a motive force in a device for unloading bulk particulate materials and recovering spillage occurring in the handling of such material. It thus is the principal object of the present invention to provide a manually operated device in the form of an eductor wand which is adapted to utilize a conventional, generally available source of compressed air found in plant facilities as a motive force for unloading freely flowing bulk particulate materials from various types of containers and otherwise recover such materials.
SUMMARY OF THE INVENTION
The present invention provides an eductor wand for vacuuming freely flowing bulk particulate material generally consisting of a first conduit having a particulate material inlet and a dilutive air inlet; a venturi disposed within such first conduit and spaced therefrom to provide a passageway therebetween intercommunicating the particulate material and dilutive air inlets, having an inlet disposed adjacent the particulate material inlet and an outlet communicable with a particulate material conveying means; and a second conduit mounted on the first conduit having an inlet communicable with a supply of air under pressure and an outlet configured to inject such pressurized air into the inlet of such venturi to create a low pressure zone at the particulate material inlet of such first conduit whereby upon applying air under pressure to such second conduit which is injected into such venturi, and the particulate material inlet of the first conduit is positioned in or adjacent a mass of particulate material, particulate material will be drawn through such particulate material inlet, dilutive, ambient air will be drawn through the dilutive air inlet and such particulate material and dilutive air will be entrained in the compressed air injected into the venturi to convey the particulate material through the venturi and the connected conveying means to its desired destination. Preferably, the venturi is mounted within the first conduit in a manner so as to permit its longitudinal displacement relative to the first conduit and correspondingly the displacement of the inlet thereof with the outlet of the second conduit, a valve is provided in the second conduit for controlling the flow of pressurized air through the second conduit, and a handle is provided which may be manually gripped to maneuver the wand for unloading material from containers or guiding it along surfaces to recover spilled material.


REFERENCES:
patent: 3512841 (1970-05-01), Kollasch et al.
patent: 5899641 (1999-05-01), Pfeiffer

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