Hydraulic classifiers
Hydraulic classifiers are provided for sorting material using injected water. Some embodiments include upper and lower housings having different cross-sectional shapes. In some embodiments, certain improvements are provided for cleanout and/or removal or replacement of teeter bars.
1. A hydraulic classifier, comprising:
an upper housing, said upper housing having a plurality of generally planar sidewalls, the upper housing having a rectangular cross-section;
a lower housing operably coupled to said upper housing, the lower housing having a round cross-section;
an overflow outlet supported on said upper housing;
a feed inlet disposed to receive aggregate material into said upper housing;
a water injection system, the water injection system comprising:
a conduit;
a plurality of teeter bars in fluid communication with said conduit; and
an underflow outlet in fluid communication with said lower housing.
2. The hydraulic classifier of claim 1 , wherein said upper housing has a square cross-section.
3. The hydraulic classifier of claim 2 , wherein said lower housing has a circular cross-section.
4. The hydraulic classifier of claim 1 , wherein said lower housing has a circular cross-section.
5. The hydraulic classifier of claim 1 , wherein said lower housing comprises a plurality of curved plate sections.
6. The hydraulic classifier of claim 5 , wherein said upper housing and said lower housing are joined by a transitional portion.
7. The hydraulic classifier of claim 6 , wherein said transitional portion comprises a plurality of curved plate sections.
8. The hydraulic classifier of claim 7 , wherein each said curved plate section comprises a straight upper edge joined to said upper housing and a curved lower edge joined to said lower housing.
9. The hydraulic classifier of claim 1 , wherein said upper housing and said lower housing are joined by a transitional portion.
10. The hydraulic classifier of claim 9 , wherein said transitional portion comprises a plurality of curved plate sections.
11. The hydraulic classifier of claim 10 , wherein each said curved plate section comprises a straight upper edge joined to said upper housing and a curved lower edge joined to said lower housing.
12. A hydraulic classifier, comprising:
a housing including an upper housing portion and a lower housing portion, said upper housing portion having a plurality of generally planar sidewalls, said lower housing portion having a plurality of curved plate sections;
a weir supported on said upper housing portion;
a launder supported on said upper housing portion, said weir disposed between said upper housing portion and said launder, said launder including an overflow outlet;
a feed inlet disposed to receive aggregate material into said upper housing portion;
a water injection system; and
an underflow outlet in fluid communication with said lower housing portion.
13. The hydraulic classifier of claim 12 , wherein said upper housing portion has a rectangular cross-section.
14. The hydraulic classifier of claim 13 , wherein said lower housing portion has a circular cross-section.
15. The hydraulic classifier of claim 12 , wherein said lower housing portion has a circular cross-section.
16. The hydraulic classifier of claim 12 , wherein said upper housing portion and said lower housing portion are joined by a transitional portion.
17. The hydraulic classifier of claim 12 , wherein each said curved plate section comprises a straight upper edge joined to said upper housing portion and a curved lower edge joined to said lower housing portion.
18. The hydraulic classifier of claim 17 , wherein said lower housing portion has a circular cross-section.
19. The hydraulic classifier of claim 18 , wherein said upper housing portion has a rectangular cross-section.
20. The hydraulic classifier of claim 18 , wherein said upper housing portion has a square cross-section.