Vibratory screening apparatus
A vibratory screening apparatus including a support and at least two screen decks arranged one over the other as an assembly. Each screen deck includes a screen frame, a screen and a chamber underlaying the screen surface, an outlet duct for oversized material and an outlet duct for undersized material in communication with the chamber. Mountings are configured for mounting the assembly of the screen decks to the support. A drive support with a motor assembly is configured for vibrating the assembly of screen decks. A feed unit is configured to feed the material to be screened to each screen deck. The feed unit is arranged on the support and configured to be moved between a feed position and a maintenance position. The assembly of the at least two screen decks is resiliently arranged on the support, while the feed unit is non-resiliently arranged on the support.
1. A vibratory screening apparatus comprising:
a support;
at least two screen decks arranged one over the other as an assembly, each screen deck including a screen frame, a screen and a chamber underlaying the screen surface, an outlet duct for oversized material and an outlet duct for undersized material that is in communication with the chamber;
mountings configured for mounting the assembly of the at least two screen decks to the support;
a drive support with a motor assembly configured for vibrating the assembly of the at least two screen decks; and
a feed unit configured to feed the material to be screened to each screen deck;
wherein the feed unit is arranged on the support and configured to be moved between a feed position and a maintenance position, wherein the feed unit is non-resiliently arranged on the support; and in that
the assembly of the at least two screen decks is resiliently arranged on the support, wherein the assembly of screen decks has a first side facing the support, which first side is fastened to the support with at least one resilient mounting, and wherein the assembly has a second side, opposite the first side, which second side is fastened to the drive support, and wherein the drive support is fastened to the support with at least one resilient mounting.
2. The vibratory screening apparatus according to claim 1 , wherein the feed unit is articulately arranged on the support.
3. The vibratory screening apparatus according to claim 1 , further comprising an abutment support attached to the support and arranged to provide an abutment surface for the feed unit when set in the feed position.
4. The vibratory screening apparatus according to claim 1 , wherein the at least two screen decks are arranged directly piled on top of each other.
5. The vibratory screening apparatus according to claim 4 , wherein the assembly of screen decks is self-supporting.
6. The vibratory screening apparatus according to claim 4 , wherein the screen decks have notches and protrusions which are configured to interact with corresponding notches and protrusions on the adjacent screen decks in the assembly.
7. The vibratory screening apparatus according to claim 4 , further comprising a tension strut configured to maintain the assembly of the at least two screen decks together.
8. The vibratory screening apparatus according to claim 1 , wherein the assembly of the at least two screen decks are configured to allow replacement as a single unit with a new assembly of at least two screen decks.
9. The vibratory screening apparatus according to claim 1 , wherein the mountings are resilient mountings.
10. The vibratory screening apparatus according to claim 1 , wherein the support comprises a lower part of the support and an inclined part of the support.
11. The vibratory screening apparatus according to claim 10 , wherein the assembly of screen decks has a first side facing the lower part of the support, which first side is fastened to the lower part of the support with at least one mounting; and wherein the assembly has a second side, opposite the first side, wherein the second side is fastened directly or indirectly to the inclined part of the support.