Alstom Transport Sa

Alstom Ferroviaria S.p.a

Alstom Transport Technologies

Stefano Bittoni

Davide Guglielmo

Andrea Borromei-Colozzi

Giuliano Luzzi

Leonardo Bozzoli

Frederic Fournel

Disclosed is switch lock device of a railway switching actuator connected to a switching slide and a tie bar/locking slide of the actuator, the switching slide and a tie bar/locking slide being slidable one over the other to lock a blade of a railway switch in a closed position, the switch lock including an oscillating catch unit oscillating between two positions, engaging either a stationary step of a casing of the actuator or a head surface of the switching slide. The oscillating catch unit links to the end of the tie bar by a spring actuated mechanism blocking oscillation of the oscillating catch unit in an unlocked position corresponding to the engagement of the switching slide. During switching, the tie bar compresses the spring actuated mechanism, and the oscillating catch unit is free to oscillate towards a locking position, engaging the step of the casing of the actuator.

Switch lock device for railway switching actuators

A hydraulic oil control unit for supplying hydraulic oil actuators in switch machines of railway points or the like is described. The control unit comprises a closed circulation circuit of a hydraulic oil fluid with delivery and return lines. These lines are connected to a hydraulic oil actuator translating point blades of the railway point for moving the point blades from a normal end position to a reverse end position or vice versa. The control unit also includes: electrical means for monitoring the movement of the point blades and/or reaching of the end position, timing means for stopping an actuating stroke of actuators moving the point blades, and means for switching the direction of the actuating stroke. The electrical means comprise switches reversing the power supply signal of an electric motor driving the pump for reversing the rotational direction of the motor and the pump. The switches are driven when the point blades reach a proper end position to reverse the circulation direction of the hydraulic oil fluid flow in the circulation circuit.

Hydraulic oil control unit for supplying hydraulic oil actuators in switch machines of railway points

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Bologna, Italy

Stefano Bittoni