Recirculating crushing plant

Patent metadata

Field	Value
Publication number	US-12311380-B2
Application number	US-202117452916-A
Country	US
Kind code	B2
Filing date	Oct 29, 2021
Priority date	Oct 29, 2020
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

Systems, methods and apparatus are provided for crushing aggregate material. In some embodiments, in an operating configuration a recirculating conveyor deposits material previously crushed by a crusher into the feed inlet of the crusher. In some embodiments, the recirculating conveyor is pivoted inward about a vertical axis into the operating configuration.

First claim

The invention claimed is:

1. A portable recirculating crushing plant, comprising:
a portable chassis;
a feeder supported on said chassis, said feeder having a discharge end;
a crusher supported on said chassis, said crusher comprising a horizontal shaft impact crusher, said crusher having an upward-facing feed inlet in an upper portion thereof to receive material deposited vertically therein, said feed inlet being separate and spaced apart from said feeder discharge end, said discharge end of said feeder being positioned to deposit material into said feed inlet of said crusher;
a vibratory classifier supported on said chassis;
a first conveyor disposed to convey material from said crusher to said vibratory classifier;
a cross-conveyor disposed to receive material from said vibratory classifier;
a pivot arm pivotally supported on said chassis for pivoting relative to said chassis about a vertical pivot axis A; and
a second conveyor disposed to receive material from said cross-conveyor, said second conveyor having a head end and a tail end, said second conveyor having a length, said second conveyor having a chute supported thereon, said chute being disposed to receive material deposited from said cross-conveyor, said chute having a chute outlet, said second conveyor having a transport configuration and an operating configuration, said second conveyor being pivotably supported on said pivot arm for pivoting relative to said pivot arm about a pivot axis B, said pivot axis B being generally parallel to said vertical pivot axis A, said pivot axis B being spaced apart from said vertical pivot axis A, whereby said second conveyor is pivotable about vertical pivot axis A and pivot axis B, said second conveyor being pivotable between said transport configuration and said operating configuration, wherein in said operating configuration, said tail end is disposed at least partly beneath and adjacent to said cross-conveyor to receive material from said cross-conveyor, wherein in said operating configuration, said second conveyor is oriented to convey material in an at least partially inboard direction, wherein in said operating configuration, said length of said second conveyor is such that said chute is disposed to guide material directly into said feed inlet without contacting said feeder, wherein in said transport configuration, said tail end is closer to said chassis than in said operating configuration, and wherein in said transport configuration, said head end is disposed outboard of said crusher, wherein said crusher is disposed such that second conveyor is able to pivot into said operating position with said head end above said crusher without interfering with said crusher.

2. The portable recirculating crushing plant of claim 1 , wherein said horizontal shaft impact crusher comprises a blow bar rotor, wherein in said operating configuration said second conveyor is disposed to deposit material onto a lateral center of said blow bar rotor.

3. The portable recirculating crushing plant of claim 1 , wherein said second conveyor comprises a chute, said chute being disposed to deposit the material into said feed inlet.

4. The portable recirculating crushing plant of claim 1 , further comprising:
a vibrating feeder supported on said chassis, wherein said crusher is disposed to receive material from said vibrating feeder.

5. The portable recirculating crushing plant of claim 1 , wherein said second conveyor is configured to deposit material at a lateral center of said feed inlet in the operational configuration of said second conveyor with said tail end being offset from said lateral center.

6. The portable recirculating crushing plant of claim 1 , wherein said crusher comprises a blow bar rotor, wherein said second conveyor is configured to deposit material at a lateral center of said blow bar rotor with said tail end being offset from said lateral center.

7. The portable recirculating crushing plant of claim 1 , further comprising a horizontal pivot along said second conveyor between said head end and said tail end, said horizontal pivot pivotally supporting said second conveyor and constraining said second conveyor to pivot about a third horizontal axis.

8. A method of crushing material, comprising:
supporting a pivot arm on a chassis for pivoting about a first vertical axis A;
supporting a return conveyor on said pivot arm for pivoting said return conveyor about a second axis B generally parallel to said first vertical axis A;
repositioning a tail end of said return conveyor from a relatively inboard transport configuration to a relatively outboard position by pivoting said return conveyor about said first vertical axis A and said second axis B;
pivoting a head end of said return conveyor to an operational configuration in which said head end of said return conveyor is at least partially disposed above a horizontal impact crusher, said pivoting movement being carried out without interfering with said horizontal impact crusher;
depositing a feed of material from a discharge end of a vibratory feeder;
with said horizontal impact crusher, said horizontal shaft impact crusher having a feed inlet separate from said vibratory feeder, receiving said feed of material in said feed inlet and crushing material from said feed of material;
conveying material from said horizontal impact crusher to a vibratory classifier;
classifying material from said horizontal impact crusher to create a first subset of classified material and a second subset of classified material;
by a cross-conveyor, depositing said first subset of classified material to said return conveyor;
by said return conveyor in said operational configuration, conveying said first subset of classified material in an at least partially inboard direction; and
by said return conveyor in said operational configuration, conveying said first subset of classified material along a return conveyor length and depositing said first subset of classified material directly into said feed inlet of said horizontal shaft impact crusher without said first subset of classified material contacting said vibratory feeder,
wherein said return conveyor is disposed such that said return conveyor length is configured such that in said operational configuration, at least one of a head end or chute of said return conveyor is disposed directly above said feed inlet and not directly above said vibratory feeder.

9. The method of claim 8 , wherein said step of crushing material comprises impacting material against a plurality of surfaces by a blow bar rotor.

10. The method of claim 9 , wherein said step of conveying material from said crusher to a vibratory classifier comprises centering said feed of material on said blow bar rotor with said tail end being off-center from said blow bar rotor.

11. The method of claim 8 , further comprising:
constraining said return conveyor to pivot about a third pivot axis disposed between said tail end and said head end of said return conveyor.

Assignees

• Superior Industries

Inventors

• Voigt Matt
• Esson Matt
• Taylor Robert

Classifications

• B02C21/02 Primary

  Transportable disintegrating plant · CPC title

• B02C23/02

  Feeding devices ({for grain mills B02C11/04; for roller mills B02C4/286}; transport devices in general B65G) · CPC title

• B02C13/02

  with horizontal rotor shaft (with axial flow B02C13/10) · CPC title

• B02C23/12 Primary

  with return of oversize material to crushing or disintegrating zone · CPC title