FIELD: machine engineering.
SUBSTANCE: unit (100) comprises a frame (1), a crusher (10) supported by the frame (1), a subframe (27) supported by the frame (1), a screen (20) supported by the subframe (27), first (30) and second (40) conveyors having a working position and installed to unload material which is supplied to the unit on the screen when the first and second conveyors are in the working position. In this case, first (30) and the second (40) conveyors are separate conveyors configured for connecting in series to form a transport connection. The first conveyor (30) is arranged for movement to the transportation position, preferably to a first side of the crusher (10), and a second conveyor (40) is supported above the screen by means of the subframe (27). The transportation position of the first conveyor (30) is substantially within the height defined by the highest point of said crusher. The subframe (27) is supported on the frame (1) by first supporting arms (25) and second supporting arms (26) forming first hinged four-links together with the frame (1) and the subframe (27), so that the second conveyor (40) is configured for moving with the screen (20) to the transportation position generally to the second side of the crusher (10). A third support arm (41) and a fourth support arm (42) are fixed at some distance from each other for turning in the third hinge units (44), which connect thereof to said conveyor above the screen, and with the possibility for rotation in the fourth hinged units (45) connecting thereof to said screen forming a movable second hinged four-link mechanism which creates a movable support for the second conveyor (40). The second conveyor (40) is configured for movement away from the crusher (10) and closer to said crusher by moving the second hinged four-link mechanism, so that the first conveyor (30) is set in its working position for loading the crusher (10), or the first conveyor (30) is installed in its working position for loading the second conveyor (40) located above the screen to load the screen (20). The transportation position of the second conveyor (40) is substantially within the height defined by the highest point of the crusher. The method for controlling said unit consists in discharging the material supplied to said unit to said screen, when the first and second conveyors are in the working position, the first conveyor is moved (30) in the transportation position, mainly to the first side of the crusher (10), the subframe (27) is supported on the frame (1) by first bearing arms (25) and second supporting arms (26) forming the first hinged four-links together with the frame (1) and the subframe (27), so that the second conveyor (40) can move together with the screen (20) in the transportation position, preferably to the second side of the crusher (10). The second conveyor (40) is supported by means of the movable four-link hinge mechanism formed by the third supporting arm (41) and the fourth supporting arm (42) that are fixed at certain distance from each other and with the possibility for rotating in the third hinged joints (44) which connect thereof to the conveyor above the screen, and with the possibility for rotating the fourth hinged units (45) which connect thereof to said screen, at that the third and the fourth support are (41, 42) are attached to the screen (20) with the possibility of rotation. The second conveyor is moved away from the said crusher and closer to said crusher by moving said second four-link hinge mechanism, so that the first conveyer (30) loads the crusher (10) or the first conveyor (30) loads the second conveyor (40) located above the screen in order to load the screen (20).
EFFECT: invention makes it possible to increase operational reliability.
15 cl, 10 dwg
