Apparatuses, methods, and systems for vibratory screening

Patent metadata

Field	Value
Publication number	US-11654380-B2
Application number	US-202117537167-A
Country	US
Kind code	B2
Filing date	Nov 29, 2021
Priority date	Oct 14, 2016
Publication date	May 23, 2023
Grant date	May 23, 2023

Abstract

Vibratory screening machines that include stacked screening deck assemblies are provided. In some embodiments, at least one of the vibratory screening machines may include an outer frame, an inner frame connected to the outer frame, and a vibratory motor assembly secured to the inner frame for vibrating the inner frame. A plurality of screen deck assemblies may be attached to the inner frame in a stacked arrangement, each configured to receive replaceable screen assemblies. The screen assemblies may be secured to respective ones of the plurality of the screen deck assemblies by tensioning the screen assemblies in a direction that a material to be screened flows across the screen assemblies. An undersized material discharge assembly may be configured to receive materials that pass through the screen assemblies, and an oversized material discharge assembly having a deflector may be configured to receive materials that pass over the screen assemblies.

First claim

What is claimed is:

1. A vibratory screening machine, comprising:
an outer frame;
an inner frame connected to the outer frame;
a vibratory motor assembly attached to the inner frame such that the vibratory motor assembly vibrates the inner frame;
a plurality of screen deck assemblies attached to the inner frame and configured in a stacked arrangement, each one of the plurality of screen deck assemblies configured to receive replaceable screen assemblies;
an undersized material discharge assembly configured to receive materials that pass through the screen assemblies, wherein the undersized material discharge assembly includes an undersized material collection channel in communication with each one of the plurality of screen deck assemblies; and
an oversized material discharge assembly comprising at least one oversized material collection channel in communication with each of the plurality of screen deck assemblies and configured to receive oversized materials that pass that do not pass through the screen assemblies and that pass over discharge ends of the plurality of screen deck assemblies, wherein the oversized material discharge assembly includes at least one deflector that is configured to alter a direction of movement of at least some of the oversized materials such that the oversized materials are directed into the at least one oversized material collection channel.

2. The vibratory screening machine according to claim 1 , wherein the at least one deflector is configured to alter a direction of movement of oversized materials on top surfaces of the screen assemblies.

3. The vibratory screening machine according to claim 1 , wherein the at least one deflector is located below the plurality of screen deck assemblies and is configured to convey oversized materials that have passed over discharge ends of the plurality of screen deck assemblies away from the undersized material collection channel and toward the at least one oversized material collection channel.

4. The vibratory screening machine according to claim 1 , wherein the oversized material discharge assembly comprises a first oversized material collection channel and a second oversized material collection channel.

5. The vibratory screening machine according to claim 4 , wherein the undersized material collection channel, the first oversized material collection channel and the second oversized material collection channel are located beneath the plurality of screen deck assemblies, and wherein the undersized material collection channel is located between the first oversized material collection channel and the second oversized material collection channel.

6. The vibratory screening machine according to claim 5 , wherein the at least one deflector causes oversized materials at central portions of the discharge ends of the screen deck assemblies to be redirected towards side edges of the discharge ends of the screen deck assemblies.

7. The vibratory screening machine according to claim 6 , wherein the at least one deflector comprises a plurality of deflectors, each deflector being located adjacent a discharge end of a screen deck assembly.

8. The vibratory screening machine according to claim 5 , wherein the at least one deflector is located below the screen deck assemblies, and wherein the at least one deflector is configured to cause oversized materials that have passed over discharge ends of the screen deck assemblies to be directed away from the undersized material collection channel and into the first and second oversized material collection channels.

9. The vibratory screening machine according to claim 8 , wherein each at least one deflector comprises first and second surfaces that cause oversized materials that have passed over discharge ends of the screen deck assemblies to be directed away from the undersized material collection channel and towards the first and second oversized material collection channels.

10. The vibratory screening machine according to claim 1 , wherein each one of the plurality of screen deck assemblies includes a first screen assembly, a second screen assembly and a trough located between the first screen assembly and the second screen assembly.

11. The vibratory screening machine according to claim 10 , wherein the trough includes an Ogee-weir structure.

12. The vibratory screening machine according to claim 1 , wherein the screen assemblies are secured to the screen deck assemblies by tensioning the screen assemblies in a direction that a material to be screened flows across the screen assemblies.

13. The vibratory screening machine according to claim 12 , further comprising a screen tensioning system that includes tensioning rods that extend substantially orthogonal to the direction of flow of the material being screened, wherein the tensioning rods are configured to mate with a portion of a screen assembly and to tension the screen assembly when rotated.

14. A method of screening a material, comprising:
feeding the material into a vibratory screening machine comprising:
a plurality of screen deck assemblies that are configured in a stacked arrangement, each one of the plurality of screen deck assemblies configured to receive replaceable screen assemblies,
an undersized material discharge assembly configured to receive materials that pass through the screen assemblies, wherein the undersized material discharge assembly includes an undersized material collection channel in communication with each one of the plurality of screen deck assemblies,
an oversized material discharge assembly comprising at least one oversized material collection channel in communication with each of the plurality of screen deck assemblies and configured to receive oversized materials that pass that do not pass through the screen assemblies and that pass over discharge ends of the plurality of screen deck assemblies, and
a deflector that is configured to alter a direction of movement of at least some of the oversized materials such that the oversized materials are directed into the at least one oversized material collection channel; and

screening the materials such that undersized materials pass through the replaceable screen assemblies and flow into the undersized material collection channel and such that oversized materials that flow over the discharge ends of the plurality of screen deck assemblies flow into the at least one oversized material collection channel, wherein the deflector alters a direction of movement of at least some of the oversized materials so that the oversized materials flow into the at least one oversized material collection channel.

15. The method of claim 14 , wherein the at least one deflector alters a direction of movement of oversized materials on top surfaces of the screen assemblies.

16. The method of claim 14 , wherein the at least one deflector is located below the plurality of screen deck assemblies and causes oversized materials that have passed over discharge ends of the plurality of screen deck assemblies to move away from the undersized material collection channel and toward the at least one oversized material collection channel.

17. The method of claim 14 , wherein the oversized material discharge assembly comprises a first oversized material collection channel and a second oversized material collection channel.

18. The method of claim 17 , wherein the undersized material collection channel, the first oversized material collection channel and the second oversized material collection channel are located beneath the plurality of screen deck assemblies, and w

Assignees

• Derrick Corp

Inventors

• Colgrove James R
• Peresan Michael L

Classifications

• B01D33/37

  in parallel connection · CPC title

• B07B2201/04

  Multiple deck screening devices comprising one or more superimposed screens · CPC title

• B07B1/4609

  constructional details of screening surfaces or meshes · CPC title

• B01D33/0376 Primary

  supported · CPC title

• B07B1/28

  Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens · CPC title