Abstract:
A machine for repairing a ballast bed has an undercutter that defines a direction of movement of the repairing machine, and a distributor for dividing a flow of ballast entering from the undercutter into a rear flow of exiting ballast and a separate front flow of exiting ballast. At least one rear screening machine is positioned behind the undercutter in the direction of movement and is fed by the rear flow of exiting ballast. At least one front screening machine is positioned in front of the undercutter and fed by the front flow of exiting ballast, and the distributor has a variator for varying the ratio between the separate first and the second flows of exiting ballast.
Abstract:
An arrangement of an excavating chain for conveying ballast of a track bed comprises a guide comprising a transverse guide section articulately connected to longitudinal guide sections defining a guide channel having an end glide track along which the excavating chain is guided. The end glide track of the transverse guide section is curved around the joints connecting the ends of the transverse guide section to the adjoining longitudinal guide sections, the end glide track enclosing an acute dihedral angle α with an imaginary plane of elongation of the end glide track of a respective one of the longitudinal guide sections whereby the excavating chain is deflected from the transverse to the longitudinal guide sections solely by contact with the end glide track.
Abstract:
A suction unit (76) provided with a suction pipe (80) having a suction opening (81) for sucking off crushed rock and being vertically and laterally adjustable is allocated to a machine (57) for treating the ballast bed of a track (60) with a machine frame (58) supported on rail travelling undercarriges (59). In addition, there is provided a clearing apparatus (62) disposed at a distance from the suction opening (81) in the longitudinal direction of the machine and provided with an endless clearing chain (64) rotatable by a drive (63) for removing the crushed rock disposed below the track (60). Like the suction pipe (80), it is provided with separate drives (82, 99) for vertical and lateral adjustment independently from one another.
Abstract:
An arrangement for installing a protective layer between a subgrade and a layer of ballast of a track bed includes an excavating unit to remove ballast from underneath the track and a subgrade stabilizing unit by which additives are disposed directly over the exposed subgrade and blended underneath the track with the subgrade for formation of a protective layer following a leveling and compacting process. Removed and cleaned ballast is then laid by a conveyor over the new protective layer.
Abstract:
A mobile ballast cleaning machine comprises a machine frame, undercarriages supporting the machine frame for mobility on the track, an excavating chain mounted on the machine frame and arranged to excavate the ballast to expose the subgrade, a ballast screening installation arranged to receive the excavated ballast from the excavating chain and to clean the received ballast, a conveyor arrangement for conveying the cleaned ballast for distribution on the exposed subgrade, a power-actuated, vertically and transversely adjustable track lifting device mounted on the machine frame, and a vibrator connected to the track lifting device, the vibrator being arranged to generate horizontal oscillations extending transversely to the longitudinal direction.
Abstract:
A ballast cleaning machine for excavating ballast supporting a track and for cleaning the excavated ballast, comprises a ballast screening installation mounted on the machine frame and arranged to receive the excavated ballast from the discharge end of a ballast excavating and conveying chain, and to clean the received ballast by separating waste therefrom, the screening installation comprising two screening units each of which comprises a set of a plurality of superposed screens extending obliquely with respect to the track in the direction of elongation of the machine, the sets of screens being arranged sequentially in, and symmetrically with respect to a vertical plane extending transversely to, this direction, and the obliquely extending screens ascending from a centrally located common outlet of the two sets of screens to two separate inlets for the excavated ballast, and independent vibrators for each set of screens for conveying the cleaned ballast on the screens in respective conveying directions from a respective one of the inlets to the common outlet.
Abstract:
A mobile ballast cleaning machine comprises a frame running on two undercarriages a rear one of which is supported on a track section resting on cleaned ballast. A ballast excavating and conveying chain is mounted on the frame in front of this track section and a ballast screening mechanism on the frame receives the excavated ballast from the chain, cleans it and discharges the cleaned ballast to a storage receptacle arranged on the frame between the undercarriages. The storage receptacle has sufficient capacity to hold a volume of the cleaned ballast corresponding to that of the excavated ballast and a rising ballast conveyor is mounted in the storage receptacle for distributing the cleaned ballast therein. The cleaned ballast is discharged from the storage receptacle for redistribution by a ballast conveyor system and devices for regulating the flow of the cleaned ballast and for guiding the same between the discharge from the receptacle and the ballast conveyor system.
Abstract:
A mobile ballast cleaning machine comprises a ballast excavating chain, a screening apparatus including a series of screens arranged to receive the excavated ballast and to clean it, a storage receptacle for the cleaned ballast, the storage receptacle having ballast outlets, and hinged covers over the outlets for selectively closing the same by means of jacks, and a ballast conveyor arrangement for controllably redistributing the cleaned ballast to the ballast bed, the ballast redistributing conveyor arrangement being arranged to receive the cleaned ballast from the outlets upon adjustment of the hinged covers.
Abstract:
Ballast cleaner mechanism carried by a railroad car along a railroad track in which an infeed conveyor supported on the car receives the dirty ballast and divides it into a multiplicity of substantially equal streams of ballast which are discharged laterally on opposite sides of the conveyor at predetermined locations along its length onto a similar plurality of shaker screens. The clean ballast from these screens is discharged onto a clean ballast conveyor, disposed beneath and generally parallel to the infeed conveyor for delivery to a suitable discharge point, while dirt conveyors disposed on opposite sides of and parallel to the clean ballast conveyor are located beneath the respective screens for reception and removal of the dirt sifted through the screens from the dirty ballast.
Abstract:
The sub-grade of a railroad ballast bed is stablized by depositing sand on the bed, removing the sand and ballast in admixture with an excavating bucket conveyor until the sub-grade has been exposed, the sand and ballast are separated from each other on a screen which receives the admixture, and two endless conveyors mounted below the screen convey the separated sand and ballast to the exposed sub-grade to deposit the separated sand thereat at a point ahead of a succeeding point where the separated ballast is deposited, thus depositing the ballast on a layer of sand interposed between the sub-grade and the ballast.