Monorail switchpoint for mine and tunnel construction uses overall sequence control to ensure swing beam cylinder only takes power once lift cylinder reaches end point.

摘要

A sequence control (20) for the lift cylinder (16) and swing beam (18) ensures the beam is completely raised as also the latching bolts (17). All components are housed in a housing box (23) allocated to the hollow beam frame (5,22). The compressed air line (24) connecting the power cylinders (19,16) as well as the AND valves and dual pressure valves only supplies air to the swing beam cylinder (16) once the power cylinder (19) is in its end setting. The line is additionally fitted with a rapid-venting valve. The lead rails (9,10) are releasably fixed to the frame (5) by screw bolts (11,12), each rail having bolts for preference. The lead rail piece has a bored forward blade and the switch blade (6) has a plug-in bolt on its flange to serve as latching bolt (17).