Abrasive and dust separator

• US 7,008,304 B1
• Filed: 08/17/2004
• Issued: 03/07/2006
• Est. Priority Date: 08/17/2004
• Status: Active Grant

• Current Assignee: Media Blast & Abrasives, Inc.
• Original Assignee: Media Blast & Abrasives, Inc.
• Inventors: Robinson, Robert A.
• Primary Examiner(s): Nguyen, George
• Assistant Examiner(s): MCDONALD, SHANTESE L
• Application Number:
  US10/919,590
• Publication Number:
  US 20060040596A1
• Time in Patent Office: 567 Days
• Field of Search: 451/75, 451/87, 451/88, 451/89, 451/91, 451/99
• US Class Current: 451/87
• CPC Class Codes: B04C 1/00 Apparatus in which the main direction of flow follows a flat spiral ; so-called flat cyclones or vortex chambers
• CPC Class Codes: B24C 9/003 Removing abrasive powder out of the blasting machine
• CPC Class Codes: B24C 9/006 Treatment of used abrasive material
• CPC Class Codes: Y02P 70/10 Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

Provided is a centrifuge media separator for separating blast particulate from fine particulate carried by air flowing from a blast cabinet and through the media separator. The centrifuge media separator comprises an upper panel, a lower panel, and an outer wall. The upper panel has a central opening formed therein. The outer wall is configured in a generally curvilinear shape and which extends between the upper and lower panels. The outer wall has at least one particulate escape aperture formed therein. The upper panel, lower panel and outer wall collectively define a curvilinear air passageway having an inlet and an outlet. The inlet is configured to allow a flow of air to enter the air passageway and circulate therethrough toward the outlet. The escape aperture is configured to exhaust the blast particulate out of the passageway. The central opening is configured to exhaust the fine particulate out of the passageway.

Claims

1. A centrifuge media separator for separating blast particulate from fine particulate carried by air flowing from a blast cabinet through the media separator, the centrifuge media separator comprising:

an upper panel having a central opening formed therein;

a lower panel; and

a curvilinear outer wall extending between the upper and lower panels and having at least one particulate escape aperture formed therein;

wherein the upper panel, lower panel and outer wall collectively define a curvilinear air passageway having an inlet and an outlet, the air passageway being configured such that a cross sectional area thereof generally decreases along a direction of the flow from the inlet to the outlet, the inlet being configured for allowing a flow of air to enter the air passageway and circulate therethrough toward the outlet, the escape aperture being configured to exhaust the blast particulate out of the passageway, the central opening being configured to exhaust the fine particulate out of the passageway.

2. The centrifuge media separator of claim 1 further comprising:

an inner ring disposed radially inwardly relative to the outer wall and being sized complementary to and extending downwardly from the central opening.

3. The centrifuge media separator of claim 2 wherein the inner ring is cylindrically shaped.

4. The centrifuge media separator of claim 1 wherein:

the outer wall has a spiral configuration of generally decreasing radius;

the outlet being disposed within the air passageway radially inwardly relative to and adjacent the inlet such that the flow of air enters the inlet, circulates through the air passageway, exits the outlet, and rejoins the flow of air entering the inlet.

5. The centrifuge media separator of claim 1 further comprising a low pressure source fluidly connected to the central opening and configured to draw air into the inlet and exhaust air through the central opening.

6. The centrifuge media separator of claim 5 wherein the low pressure source is a blower mounted on the blast cabinet.

7. The centrifuge media separator of claim 6 wherein the blower is sized to generate a velocity of between about 2000 to about 6500 feet per minute for air entering the inlet.

8. A centrifuge media separator for separating blast particulate from fine particulate carried by air flowing from a blast cabinet through the media separator, the centrifuge media separator comprising:

an upper panel having a central opening formed therein;

a lower panel;

a curvilinear outer wall extending between the upper and lower panels and having at least one particulate escape aperture formed therein; and

an air foil mounted on the outer wall adjacent to the escape aperture and extending generally radially inwardly toward the central opening, the air foil being configured to facilitate exhaustion of the blast particulate through the escape aperture;

wherein the upper panel, lower panel and outer wall collectively define a curvilinear air passageway having an inlet and an outlet, the inlet being configured for allowing a flow of air to enter the air passageway and circulate therethrough toward the outlet, the escape aperture being configured to exhaust the blast particulate out of the passageway, the central opening being configured to exhaust the fine particulate out of the passageway.

9. The centrifuge media separator of claim 8 wherein the air foil is disposed on a downstream side of the escape aperture.

10. The centrifuge media separator of claim 8 wherein the outer wall and the air foil are integrally formed as a unitary structure.

11. A centrifuge media separator for separating blast particulate from fine particulate carried by air flowing from a blast cabinet through the media separator, the centrifuge media separator comprising:

a substantially planar upper panel having a circularly shaped opening formed in a central portion thereof;

a substantially planar lower panel;

a curvilinear outer wall having a spiral configuration of generally decreasing radius, the outer wall extending between the upper and lower panels and having at least one particulate escape aperture formed therein;

an air foil mounted on the outer wall adjacent to the escape aperture and extending generally radially inwardly toward the central opening, the air foil being configured to facilitate exhaustion of the blast particulate through the escape aperture;

an extension extending between the upper and lower panels and extending from the outer wall such that the outlet is located downstream of the inlet along a direction of the flow for preventing a flow reversal at the inlet; and

a cylindrically shaped inner ring disposed radially inwardly relative to the outer wall and being sized complementary to and extending partially downwardly from the central opening;

wherein the upper panel, lower panel and outer wall collectively define a curvilinear air passageway having a rectangularly shaped inlet and a rectangularly shaped outlet, the inlet being configured for allowing a flow of air to enter the air passageway and circulate therethrough toward the outlet, the air passageway being configured such that a cross sectional area thereof generally decreases along a direction of the flow from the inlet to the outlet, the outlet being disposed radially inwardly relative to and positioned downstream of the inlet such that the flow of air enters the inlet, circulates through the air passageway, exits the outlet, and rejoins the flow of air entering the inlet, the escape aperture being configured to exhaust the blast particulate out of the passageway, the central opening being configured to exhaust the fine particulate out of the passageway.

12. The centrifuge media separator of claim 11 wherein the air foil is disposed on a downstream side of the escape aperture.

13. The centrifuge media separator of claim 12 wherein the outer wall and the air foil are integrally formed as a unitary structure.

14. The centrifuge media separator of claim 11 further comprising a low pressure source fluidly connected to the central opening and configured to draw air into the inlet and exhaust air through the central opening.

15. The centrifuge media separator of claim 14 wherein the low pressure source is a blower mounted on the blast cabinet.

16. A blast cabinet having a centrifuge media separator for separating blast particulate from fine particulate carried by air flowing from the blast cabinet and into the media separator, the blast cabinet having a housing defining an enclosure and being configured for blasting a workpiece disposed within the enclosure, the centrifuge media separator being mounted on the housing and comprising:

an upper panel having a central opening formed therein;

a lower panel; and

a curvilinear outer wall extending between the upper and lower panels and having at least one particulate escape aperture formed therein;

wherein the upper panel, lower panel and outer wall collectively define a curvilinear air passageway having an inlet and an outlet, the air passageway being configured such that a cross sectional area thereof generally decreases along a direction of the flow from the inlet to the outlet, the inlet being configured for allowing a flow of air to enter the air passageway and circulate therethrough toward the outlet, the escape aperture being configured to exhaust the blast particulate out of the passageway, the central opening being configured to exhaust the fine particulate out of the passageway.

17. The centrifuge media separator of claim 16 further comprising:

an inner ring disposed radially inwardly relative to the outer wall and being sized complementary to and extending partially downwardly from the central opening.

18. The centrifuge media separator of claim 17 wherein the inner ring is cylindrically shaped.

19. The centrifuge media separator of claim 16 wherein:

the outer wall has a spiral configuration of generally decreasing radius;

the outlet being disposed within the air passageway radially inwardly relative to and adjacent the inlet such that the flow of air enters the inlet, circulates through the air passageway, exits the outlet, and rejoins the flow of air entering the inlet.

20. The centrifuge media separator of claim 16 further comprising a low pressure source fluidly connected to the central opening and configured to draw air into the inlet and exhaust air through the central opening.

21. The centrifuge media separator of claim 20 wherein the low pressure source is a blower mounted on the housing.

22. A blast cabinet having a centrifuge media separator for separating blast particulate from fine particulate carried by air flowing from the blast cabinet and into the media separator, the blast cabinet having a housing defining an enclosure and being configured for blasting a workpiece disposed within the enclosure, the centrifuge media separator being mounted on the housing and comprising:

an upper panel having a central opening formed therein;

a lower panel; and

a curvilinear outer wall extending between the upper and lower panels and having at least one particulate escape aperture formed therein;

an air foil mounted on the outer wall adjacent to the escape aperture and extending generally radially inwardly toward the central opening, the air foil being configured to facilitate exhaustion of the blast particulate through the escape aperture;

wherein the upper panel, lower panel and outer wall collectively define a curvilinear air passageway having an inlet and an outlet, the inlet being configured for allowing a flow of air to enter the air passageway and circulate therethrough toward the outlet, the escape aperture being configured to exhaust the blast particulate out of the passageway the central opening being configured to exhaust the fine particulate out of the passageway.

23. The centrifuge media separator of claim 22 wherein the air foil is disposed on a downstream side of the escape aperture.

24. The centrifuge media separator of claim 22 wherein the outer wall and the air foil are integrally formed as a unitary structure.