Vibrating screen deck deflector systems and methods
View Patent ↗A material processing vibrating screen with diverting systems configured to deliver material, via a plurality of material diverters, to locations closer to a feed end of the screen than would otherwise be done in the absence of the diverters. The diverters can be fixed to a cross member, the underside of a screen, and may be adjustable and easily replaceable. The materials for the deflectors can vary depending upon the material being screened. The screen may be also be a variable sloped vibrating screen.
1. A material products processing vibrating screen mechanism comprising:
a multi-deck vibrating screen assembly, having an upper deck, a lower deck, a feed end and a discharge end and a common downwardly directed material flow direction across the top of said upper deck and across the top of said lower deck from said feed end to said discharge end;
a first material diverter disposed between said upper deck and said lower deck sized, configured and located for directing a flow of material, which has passed through holes in the upper deck, in a direction vector which has a component counter to the material flow direction across said upper deck; and a second material diverter wherein said first material diverter and said second material diverter are located in a gap between said upper deck and said lower deck, in which no other decks are disposed; wherein said second material diverter is located downstream from and parallel to said first material diverter and thereby closer to said discharge and said lower deck, in which no other decks are disposed; wherein said second material diverter is located downstream from and parallel to said first material diverter and thereby closer to said discharge end than is said first material diverter; and wherein said multi-deck vibrating screen assembly is oriented at an inclined angle with respect to the horizontal.
2. The mechanism of claim 1 wherein said first material diverter is located so that a resultant maximum depth of material on said lower deck is reduced with respect to a maximum depth of material on the lower deck in an absence of such first material diverter.
3. The mechanism of claim 1 wherein said first material diverter is coupled to a first support member, which spans a width of said lower deck, said material diverter is located said upper deck.
4. The mechanism of claim 1 wherein said material diverter is adjustable in angular orientation and in length.
5. The mechanism of claim 1 wherein said material diverter is flexible.
6. A multi-deck vibrating screen comprising:
an upper deck;
a lower deck; disposed below the upper deck with a uniform separation distance therebetween;
a feed end and a discharge end and a downwardly directed material flow direction across said upper deck and said lower deck from said feed end to said discharge end;
a plurality of flow diverting means disposed between said upper deck and said lower deck, configured and located for directing a flow of material, which has passed through holes in the upper deck, in a direction vector which is counter to the material flow direction across the upper deck and the lower deck and configured so that a resultant maximum depth of material on said lower deck is reduced with respect to a maximum depth of material on the lower deck in an absence of such plurality of material diverters;
an intermediate deck disposed between said upper deck and said lower deck in a parallel configuration and said plurality of flow diverting means being disposed in a gap between said upper deck and said intermediate deck, with no other decks disposed in said gap;
a lower material deflector disposed between said intermediate deck and said lower deck and configured to divert material which was previously diverted by said plurality of flow diverting means;
a lower material deflector disposed between said intermediate deck and said lower deck and configured to divert material which was previously diverted by said plurality of flow diverting means;
wherein said plurality of flow diverting means is a plurality of upper material deflectors coupled below said upper deck;
and wherein said plurality of upper material deflectors are adjustable in angular orientation and length.
7. A method of sorting material into predetermine particle size range groups comprising the steps of:
providing a multi-deck vibrating screen having:
an upper deck; a lower deck; a feed end; a discharge end;
an upper downwardly directed material flow direction across a top side of said upper deck from said feed end to said discharge end; and
a lower downwardly directed material flow direction across a top side of said lower deck from said feed end to said discharge end; using a first material diverter disposed between upper deck and said lower deck to prohibit material from otherwise passing through the upper deck and immediately contacting the lower deck which is adjacent to the upper deck, and instead causing a redirection to a location thereon which is closer to a feed end of said multi-deck vibrating screen than said material would have if no such first material diverter were used; and
using a second a second material diverter disposed between an upper deck and said lower deck to prohibit material from otherwise passing through the upper deck and immediately contacting the lower deck which is adjacent to the upper deck and instead causing a redirection to a location thereon which is closer to a feed end of said multi-deck vibrating screen than said material would have if no such second material diverter were used; wherein said second material diverter is located downstream from and parallel to said first material diverter and thereby closer to said discharge end than is said first material diverter.
8. The method of claim 7 further comprising the steps of:
changing a slope characteristic of said multi-deck vibrating screen; and
wherein said step of using a first material diverter comprises the steps of automatically adjusting one of an angular orientation and length of said first material diverter to change a distribution pattern of material contacting said next lower deck, where an input into controlling the orientation and length is dependent upon said slope characteristic of the multi-deck vibrating screen.
9. The method of claim 7 further comprising the steps of augmenting said material diverter with a supplemental material diverter to change a distribution pattern of material contacting said next lower deck.
10. A method of claim 7 wherein said multi-deck vibrating screen is oriented in a substantially non-inclined plane.
11. A method of claim 7 wherein said step of using a first material diverter further performs the function of reducing an amount of fines material which passes through two adjacent decks in a substantially vertical path.