Screening assembly and mobile material processing machine

Patent metadata

Field	Value
Publication number	US-2021069750-A1
Application number	US-201816763397-A
Country	US
Kind code	A1
Filing date	Nov 12, 2018
Priority date	Nov 13, 2017
Publication date	Mar 11, 2021
Grant date	—

Abstract

A screening assembly for screening material includes an assembly frame, a multi-deck screening device, a transfer conveyor and a drive means. The drive means is operable to shift at least one of the discharge ends of the screening device and the receiving end of the conveyor relative to the assembly frame to allow the transfer conveyor to selectively receive material from an upper screen and from both screens of the screening device at their respective discharge ends. A mobile material processing plant incorporating the screening assembly is included.

First claim

1 . A screening assembly for screening material comprising:
an assembly frame; a screening device coupled to the assembly frame, the screening device including a first screen and a second screen, the second screen being substantially vertically-stacked below the first screen, each of the first and second screens having a discharge end; a first conveyor coupled to the assembly frame and configured to receive at a receiving end material from at least one of the screens at their respective discharge ends; and a drive means mounted at the assembly frame, wherein the drive means is operable to shift at least one of the discharge ends of the screening device and the receiving end of the first conveyor relative to the assembly frame, to allow the first conveyor to selectively receive material from the first screen at its discharge end or from the first and the second screens at their respective discharge ends.

2 . The assembly of claim 1 , wherein the first conveyor is arranged transversely relative to a longitudinal direction of the screening device, the first conveyor being a transfer conveyor.

3 . The assembly of claim 1 , wherein the assembly frame includes a carrier frame and a screen support frame movably coupled to the carrier frame, wherein the carrier frame is configured to support the first conveyor and the screen support frame is configured to support the screening device.

4 . The assembly of claim 9 , further comprising a third conveyor coupled to the assembly frame, the third conveyor being arranged transversely relative to a longitudinal direction of the screening device, and operable to receive over-sized material from the discharge end of the second screen, wherein the third conveyor is a stockpile conveyor.

5 . The assembly of claim 1 , wherein the shifting operation includes lifting or lowering at least one of the discharge ends of the screening device and the receiving end of the first conveyor relative to the assembly frame.

6 . The assembly of claim 1 , wherein the drive means is a hydraulically actuated piston/cylinder device having a first end that is pivotably attached to one of the screen support frame and the first conveyor, a second end of the piston/cylinder device being pivotably connected to the carrier frame, optionally the drive means acts on one of the screening device and the first conveyor via a telescopic arm.

7 . The assembly of claim 6 , wherein the carrier frame includes a slot and a latching bracket, wherein one of the screen support frame and the first conveyor includes a coupling, such as a pin support configured to engage the first end of the drive means or the telescopic arm, wherein the latching bracket is operable to latch the coupling within the slot.

8 . The assembly of claim 3 , further comprising a second drive means, communicating with the carrier frame and the screen support frame, and being operable to change a tilting angle of the screening device.

9 . The assembly of claim 1 , further comprising a second conveyor coupled to the assembly frame and arranged below the screening device for receiving under-sized material from the screening device.

10 . The assembly of claim 1 , wherein further comprising a recirculation conveyor mounted at the assembly frame for receiving material delivered from the first conveyor.

11 . The assembly of claim 4 , wherein the third conveyor is rotatable in horizontal plane about a pivot mechanism of the assembly frame.

12 . The assembly of claim 1 , wherein the first conveyor and/or the drive means and/or the recirculation conveyor are mounted separately from the assembly frame, the first conveyor, the drive means and/or the recirculation conveyor being mounted on a base machine, the base machine being a mobile crusher.

13 . The assembly of claim 12 , wherein the assembly frame is configured to detachably couple to the base machine, wherein upon coupling, a supply conveyor of the base machine is configured to be located above the first screen and to feed material onto the first screen.

14 . The assembly of claim 12 , wherein the assembly frame includes support arms configured to be couplable with the base machine, wherein the arms each have an angled telescopic portion.

15 . The assembly of claim 4 , wherein the screening device, the conveyors the assembly frame, and/or an attachment bracket that is mounted on the carrier frame and configured to rotatably support the recirculation conveyor, are of a modular structure.

16 . A method for processing material in a screening assembly as claimed in claim 1 , the method comprising
adjusting the screening assembly by the aid of the drive means to set the assembly in an intended work position, wherein at least one of the discharge ends of the screening device and the receiving end of the first conveyor is displaceable relative to the assembly frame by the drive means to allow the first conveyor to selectively receive material from the first screen at its discharge end or from the first and the second screens at their respective discharge ends; generating vibration onto the screens to permit material to move under gravity on the screens or pass through the screens; supplying material to be screened onto a surface of the first screen; and conveying material delivered from the discharge end of the screening device by the first conveyor.

17 . A mobile material processing plant including the assembly according to claim 1 .

18 . The assembly of claim 4 , wherein the screening device, the conveyors, the assembly frame, and/or the attachment bracket are each constructed of various modules that are bolted together.

19 . The assembly of claim 8 , wherein the second drive means is a piston/cylinder device or a telescopic arm driven by a piston/cylinder device.

Assignees

• Sandvik Intellectual Property

Inventors

• Mcdevitt Terry
• Graydon Stuart

Classifications

• B07B2201/04

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

• B07B1/005 Primary

  Transportable screening plants · CPC title

• B07B13/16

  Feed or discharge arrangements · CPC title

• B02C21/02

  Transportable disintegrating plant · CPC title