TROMMEL SCREEN WITH DIFFERENT SIZED APERTURES

• US 20160354806A1
• Filed: 02/24/2016
• Published: 12/08/2016
• Est. Priority Date: 02/24/2015
• Status: Active Grant

• Current Assignee: Vermeer Manufacturing Company
• Original Assignee: Vermeer Manufacturing Company
• Inventors: Eberts, Kenneth Scott, Luke, Jason, Torberson, Nathan Lee, Strand, Curtis A., Handel, Jeremy W., Lachman, Erin C., Dubs, Douglas L.
• Granted Patent: US 10,300,508 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B07B 1/005 Transportable screening plants
• CPC Class Codes: B07B 1/22 Revolving drums
• CPC Class Codes: B07B 13/16 Feed or discharge arrangements

Abstract

A screening machine includes a rotary trommel screen having an overall length. The rotary trommel screen has an inlet and an outlet end. The screening machine includes a first collection area proximate to the inlet end and under the rotary trommel screen. The first collection area corresponds to at least 65 percent of the overall length of the trommel screen. The screening machine includes a second collection area proximate to the outlet end and under the rotary trommel screen. The second collection area corresponds to the remainder of the overall length of the trommel screen not corresponding to the first collection area. The first and second collection areas are configured to separate a first and second product respectively. Sections of the trommel screen corresponding to the first and second collection areas are configured such that a size of the first product is different than a size of the second product.

Claims

1. A screening machine comprising:

a rotary trommel screen having an overall length, the rotary trommel screen further having an inlet end and an outlet end, the trommel screen defining at least a first screen section and a second screen section, the first screen section being configured to yield a first product, the second screen section being configured to yield a second product;

a first collection area proximate to the inlet end and under the rotary trommel screen, wherein the first collection area corresponds to at least 65 percent of the overall length of the trommel screen;

a second collection area proximate to the outlet end and under the rotary trommel screen, wherein the second collection area corresponds to the remainder of the overall length of the trommel screen not corresponding to the first collection area, and wherein the first and second collection areas are configured to collect a first and second product respectively, the first screen section and the second screen section corresponding to the first and second collection areas, the first screen section and the second screen sections being configured such that a size of the first product is different than the size of the second product.

2. The screening machine of claim 1, wherein the first screen section is configured to deposit the first product in the first collection area;

and wherein the second screen section is configured to deposit the second product in the second collection area.

3. The screening machine of claim 2, wherein the size of the first product is smaller than the size of the second product.

4. The screening machine of claim 2, wherein the first and second screen sections each have a plurality of screen apertures, the first screen section apertures having dimensions different than the second screen section apertures.

5. The screening machine of claim 4, wherein the first screen section apertures are smaller than the second screen section apertures.

6. The screening machine of claim 1, further comprising a first conveyor positioned to transport material collected by the first collection area, the first conveyer being configured to move material to the first discharge.

7. The screening machine of claim 6, further comprising a second conveyor positioned to transport material collected by the second collection area, the second conveyer being configured to move material to the second discharge.

8. The screening machine of claim 7, wherein the second conveyer is aligned transversely with the trommel screen and configured to deposit material at a side of the trommel screen.

9. The screening machine of claim 7, wherein the first conveyor is aligned longitudinally with the trommel screen, and wherein the first conveyor is configured to move in a direction toward the inlet end of the trommel screen.

10. The screening machine of claim 8, wherein the first conveyor is selectively reversible and configured to move in a direction toward the inlet end of the trommel screen or in a direction toward the outlet end of the trommel screen.

11. The screening machine of claim 10, wherein the second conveyer is configured to receive material from the first conveyor.

12. The screening machine of claim 10, wherein the first conveyor moves material to a third conveyor when moving in a direction toward the inlet end of the trommel screen, the third conveyer being configured to move material to the first discharge.

13. The screening machine of claim 1, further comprising an outlet conveyor positioned at the outlet end of the rotary trommel screen.

14. The screening machine of claim 1, wherein the first collection area section is at least 70 percent of the overall length of the trommel screen, and wherein the second collection area makes up the remainder of the overall length of the trommel screen not occupied by the first collection area.

15. The screening machine of claim 1, further comprising:

a first discharge corresponding to the first collection area; and

a second discharge corresponding to the second collection area.

16. The screening machine of claim 1, wherein a third product is separated and expelled from the outlet of the trommel screen.

17. A screening machine comprising:

a rotary trommel screen having an overall length, the rotary trommel screen further having an inlet end and an outlet end, the trommel screen defining at least a first screen section and a second screen section, the first screen section being configured to yield a first product, the second screen section being configured to yield a second product;

a first collection area proximate to the inlet end and under the rotary trommel screen; and

a second collection area proximate to the outlet end and under the rotary trommel screen, the first and second collection areas are configured to collect a first and second product respectively, the first screen section and the second screen section corresponding to the first and second collection areas, the first screen section and the second screen sections being configured such that a size of the first product is different than the size of the second product; and

a first conveyor positioned longitudinally with the trommel screen, wherein the first conveyor is selectively reversible and configured to move in a direction toward the inlet end of the trommel screen or in a direction toward the outlet end of the trommel screen.

18. The screening machine of claim 17, further comprising a second conveyor positioned to transport material collected by the second collection area, the second conveyer being configured to move material to the second discharge, and wherein the first conveyor is positioned to transport material collected by the first collection area, the first conveyer being configured to move material to the first discharge.

19. The screening machine of claim 18, wherein when moving in a direction toward the outlet end of the trommel screen, the first conveyor moves material to the second conveyor.

20. The screening machine of claim 18, wherein the second conveyer is aligned transversely with the trommel screen and configured to deposit material at a side of the trommel screen.

21. The screening machine of claim 17, wherein, when moving in a direction toward the inlet end of the trommel screen, the first conveyor moves material to a third conveyor, the third conveyer being aligned transversely with the trommel screen and configured to move material to the first discharge.

22. The screening machine of claim 17, wherein the first screen section is configured to deposit the first product in the first collection area;

and wherein the second screen section is configured to deposit the second product in the second collection area.

23. The screening machine of claim 22, wherein the first and second screen sections each have a plurality of screen apertures, the first screen section apertures having dimensions different than the second screen section apertures.

24. The screening machine of claim 22, wherein the size of the first product is smaller than the size of the second product.

25. The screening machine of claim 17, further comprising an outlet conveyor positioned at the outlet end of the rotary trommel screen.

26. The screening machine of claim 17, further comprising:

a first discharge corresponding to the first collection area; and

a second discharge corresponding to the second collection area.

27. The screening machine of claim 17, wherein a third product is separated and expelled from the outlet of the trommel screen.

28. A screening machine comprising:

a rotary trommel screen having an overall length, the rotary trommel screen further having an inlet end, an outlet end, and a plurality of sections;

a first collection area proximate to the inlet end and under the rotary trommel screen, wherein the first collection area corresponds to at least 65 percent of the overall length of the trommel screen;

a second collection area proximate to the outlet end and under the rotary trommel screen, wherein the second collection area corresponds to the remainder of the overall length of the trommel screen not corresponding to the first collection area, and

wherein the first and second collection areas are configured to collect a first and second product respectively, and wherein sections of the trommel screen corresponding to the first and second collection areas are configured such that a size of the first product is different than the size of a second product.