DRUM TYPE WASHER FOR METAL BORINGS AND THE LIKE

• US 3,754,559 A
• Filed: 01/31/1972
• Issued: 08/28/1973
• Est. Priority Date: 01/31/1972
• Status: Expired due to Term

• Current Assignee: Paul J. Seiwert
• Original Assignee: Paul J. Seiwert
• Inventors: Seiwert, Paul J.
• Primary Examiner(s): Bleotge, Robert L.
• Application Number:
  US05/222,109
• Time in Patent Office: 575 Days
• Field of Search: 134/65,104,132,153,154
• US Class Current: 134/65
• CPC Class Codes: B08B 3/042 the loose articles or bulk material travelling gradually through a drum or other container, e.g. by helix or gravity

Abstract

An elongated drum type washer for metal borings, cuttings and fines having a continuous helical vane for advancing the materials to be cleaned from one end of the drum to the other, the drum being divided longitudinally into a plurality of zones for selectively spraying the materials being cleaned with a liquid and then draining them, the draining zones being provided with spaced apart perforated openings in the periphery of the drum for discharging liquid therefrom, the openings lying between contiguous convolutions of the helical vane with laterally disposed baffles overlying the openings, the baffles being arranged to direct the materials being cleaned away from the openings as the drum is rotated while permitting the liquid to be discharged through the openings.

Claims

1. A washer for extremely small materials such as metal borings, cuttings and the like, comprising an elongated cylindrical drum having an inlet end and a discharge end, means mounting said drum for rotation in one direction, a continuous helical vane extending lengthwise of said drum with its convolutions projecting inwardly from the inner cylindrical surface thereof and oriented to convey the materials being cleaned from the inlet end to the discharge end of said drum, said drum having at least one liquid spraying zone followed by a liquid draining zone, spraying means within said drum in said liquid spraying zone, a plurality of spaced apart openings in the cylindrical surface of said drum in the liquid draining zone, said openings extending between adjacent convolutions of said helical vane, each said opening having a leading edge and a trailing edge relative to the direction of rotation of said drum, an inclined baffle overlying each of said openings, each of said baffles having its leading edge secured to said drum along the leading edge of said opening with its trailing edge extending to at least the trailing edge of said opening and lying in spaced relation thereto to define a slot-like outlet port between the trailing edge of said baffle and the trailing edge of the underlying opening, whereby when said drum is rotated, the baffles will deflect the materials being cleaned away from said outlet ports while permitting spraying liquid accumulated on the undermost inner surface of the drum to flow through said outlet ports for discharge.

2. The washer claimed in claim 1 wherein said openings are each defined by a plurality of perforations.

3. The washer claimed in claim 2 wherein a spraying means is mounted outside said drum in said draining zone and positioned to backwash said perforated openings.

4. The washer claimed in claim 1 wherein some at least of the convolutions of said helical vane in the draining zone are perforated.

5. The washer claimed in claim 1 wherein successive convolutions of the helical vane in the liquid spraying zone are of different depths, with the deepest convolution nearest the leading end of the drum and with a plurality of successive convolutions of successively decreasing depth.

6. The washer claimed in claim 5 wherein said drum is inclined upwardly from its inlet end to its discharge end.

7. The washer claimed in claim 1 wherein the spraying means within said drum comprises an elongated conduit extending lengthwise of said drum, wherein said conduit has a plurality of nozzles projecting outwardly therefrom, and wherein successive nozzles are staggered relative to each other to direct liquid onto the inner cylindrical surface of said drum at different angles.

8. The washer claimed in claim 7 wherein successive nozzles are staggered relative to each other in sets, with the first nozzle in each set positioned to spray vertically downwardly, with the succeeding nozzles in each set positioned to impinge on the inner cylindrical surface of said drum in the direction of its rotation.

9. The washer claimed in claim 8 wherein there are three nozzles in each set, and wherein said nozzles are staggered relative to each other at angles of about 15*.

10. The washer claimed in claim 1 wherein a kicker bar extends between adjacent convolutions of the helical vane in advance of the leading edge of each of said openings.

11. The washer claimed in claim 10 wherein there are four equally spaced apart openings between two adjoining convolutions within said draining zone, and wherein said kicker bars are equally spaced between adjacent openings.

12. The washer claimed in claim 1 wherein said washer has a first liquid spraying zone at the leading end of said drum for introducing a washing liquid, and a second liquid spraying zone for introducing a rinsing liquid, said first and second spraying zones being separated by a washing solutiOn draining zone.

13. The washer claimed in claim 12 wherein said second spraying zone is followed by a second draining zone for said rinsing solution toward the discharge end of said drum.

14. The washer claimed in claim 13 wherein a spraying means is mounted outside said drum in each of said draining zones and positioned to backwash said openings, said openings each being defined by a plurality of perforations, the openings in the first draining zone being backwashed with washing liquid and the openings in the second draining zone being backwashed with rinsing liquid.

15. The washer claimed in claim 14 wherein the convolutions of the helical vane are perforated in the draining zones and imperforate in the liquid spraying zones.

16. The washer claimed in claim 15 wherein said liquid spraying means comprises elongated conduits extending lengthwise of said drum and positioned above the axis of rotation thereof, said conduits each being provided with a plurality of spaced apart nozzles arranged to direct liquid downwardly onto the materials in said drum.

17. The washer claimed in claim 16 wherein the conduit for introducing washing liquid projects inwardly into said drum from the inlet end thereof, and wherein the conduit for introducing rinsing liquid projects inwardly into said drum from the discharge end thereof.

18. The washer claimed in claim 17 wherein the spraying means for backwashing the openings in said first draining zone and said conduit for introducing washing liquid are connected to a common source of washing liquid.