System for screening ballast with two screens
AssigneeMatisa Materiel Industriel S.A.
InventorJörg Ganz
Life of this patent
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Abstract
A system (10) for sieving ballast comprises a first sieve (26) and a second sieve (28) which is located behind the first sieve (26) in a first direction (100). A discharge collection conveyor (32.1) is located directly under a first discarded ballast outlet (42) of the first sieve (26) in order to collect a flow of discarded ballast which comes from the first sieve (26) and to convey it in a second direction (200) counter to the first direction (100). A rerouting collection conveyor directly collects the flow being discharged from a clean ballast outlet of the second sieve in order to convey it in the first direction (100). The rerouting collection conveyor extends under the first sieve (26) at a lower height than the discharge collection conveyor.
Claims11
Ballast sieving system (10) capable of moving parallel to a working direction (T), comprising
- a sieving installation (14) comprising at least a first sieve (26) having a first soiled ballast inlet (38), a first clean ballast outlet (44) which is located in front of the first soiled ballast inlet in a first direction (100) parallel to the working direction and a first discarded ballast outlet (42), and at least one second sieve (28) having a second soiled ballast inlet (48) which is located behind the first soiled ballast inlet (38) in the first direction (100), a second clean ballast outlet (54) which is located behind the first clean ballast outlet (44) and in front of the second soiled ballast inlet (48) in the first direction (100) and a second discarded ballast outlet (52),
- a set of one or more rerouting conveyors (34) capable of collecting and conveying, in the first direction (100), a flow leaving the second clean ballast outlet (54) and a flow leaving the first clean ballast outlet (44), the set of one or more rerouting conveyors (34) comprising one or more rerouting collection conveyors for directly collecting the flow leaving the second clean ballast outlet and conveying it in the first direction (100),
- a set of one or more discharge conveyors (32) capable of collecting and conveying, in a second direction (200) parallel to the working direction (T) and opposite the first direction (100), a flow of discarded ballast from the first discarded ballast outlet (42) and a flow of discarded ballast from the second discarded ballast outlet (52), the set of one or more discharge conveyors (32) comprising one or more first discharge collection conveyors (32.1), located directly below the first discarded ballast outlet (42) to collect a flow of discarded ballast from the first sieve (26) and to convey it in the second direction (200),
- characterized in that
- the one or more rerouting collection conveyors extend under the first sieve (26) at a lower height than the first discharge collection conveyor(s), and
- the second sieve (28) comprises a discarded ballast inlet (56) suitable for being supplied by the first discharge collection conveyor(s), and a spout (57) for passing the flow of discarded ballast coming from the first sieve (26) from the discarded ballast inlet (56) to the second discarded ballast outlet (52).
Mobile ballast sieving system (10) according to one of the preceding claims, characterized in that the second sieve (28) and the first sieve (26) overlap.
Mobile ballast sieving system (10) according to one of the preceding claims, characterized in that the set of one or more rerouting conveyors (34) comprises at least one common rerouting conveyor capable of conveying both the flow of clean ballast from the second clean ballast outlet (54) and the flow of clean ballast from the first clean ballast outlet (44), in the first direction (100), at least part of the common rerouting conveyor preferably being positioned under the first sieve (26).
Mobile ballast sieving system (10) according to one of the preceding claims, characterized in that it further comprises an assembly (16) for relining or storing clean ballast, supplied by the set of one or more rerouting conveyors (34), the assembly (16) for relining or storing clean ballast being positioned preferably in front of the first soiled ballast inlet (38), and preferably in front of the first sieve (26), in the first direction (100).
Mobile ballast sieving system (10) according to one of the preceding claims, characterized in that it further comprises a discarded ballast storage assembly (18), the set of one or more discharge conveyors (32) comprising at least one common discharge conveyor (32.2, 32.3) capable of conveying both the flow of discarded ballast from the first discarded ballast outlet (42) and the flow of discarded ballast from the second discarded ballast outlet (52) to the discarded ballast storage assembly, in the second direction (200), at least part of the common discharge conveyor (32.2) preferably being positioned under the second sieve (28).
Mobile ballast sieving system (10) according to one of the preceding claims, characterized in that it further comprises an excavation assembly (15), and a set of one or more excavation conveyors, capable of transferring soiled ballast from the excavation assembly to the first distributor while constituting the incident soiled ballast flow.
Mobile ballast sieving system (10) according to one of the preceding claims, characterized in that it comprises at least one first distributor (58), able to distribute an incident soiled ballast flow between the first soiled ballast inlet (38) and the second soiled ballast inlet (48), preferably according to one, two or three of the following operating modes:
- a distribution operating mode, in which the first distributor (58) is able to distribute the incident soiled ballast flow between the first soiled ballast inlet (38) and the second soiled ballast inlet (48);
- a return operating mode to the second sieve, in which the first distributor (58) is able to direct the incident soiled ballast flow entirely toward the second soiled ballast inlet (48);
- a return operating mode to the first sieve, in which the first distributor (58) is able to direct the incident soiled ballast flow entirely toward the first soiled ballast inlet (38).
Dependencies are inferred from the claim text.