The segments erectors, built by Galbiati, are identical for both weight and size. They are made up of a fixed structure and a moving one, both made of electro-welded structural metalwork and machined on machine tools.
The fixed part consists of two longitudinal beams on which the sliding guides of wear-resistant material are mounted. The moving part consists of the translating/rotating ring and the pick-up system.
The erectors are equipped with a mechanical pick up unit in order to grasp segments. The mechanical pick up unit grasps and retains segments for the entire duration of the positioning operations with three independent movements:
- Swinging = ± 5°
- Pitch = ± 5°
- Roll = ± 5°
Below photos of the erectors completely assembled at Galbiati workshops.
The erectors have also included a coupling plate equipped with bolt benching machine.
Erectors technical data:
- Total beams length = 7,000 mm
- Overall rotation = ± 200°
- Translation movement speed = N/A
- Rotational speed = max. 2 rpm
- Maximum load = 4,500 Kg
- Weight = ~ 25 ton
- Intrados diameter = 5,400 mm