Machine for applying concrete to tunnel walls - has universally mounted swing arm controlled by pneumatic cylinders

摘要

The machine for applying concrete to tunnel walls has an applicator nozzle (10) mounted on a telescopic extension (7) of swing arm (6). Concrete is supplied through flexible pipe (9). The swing arm (6) is attached to frame (1) by means of universal joint (5). The frame (1) can be moved on wheels or skids for transport. Pneumatic cylinder (15) supports the weight of the arm (6), while working cylinders (12) provide the required movement of the arm. The machine is controlled by a switching system in valve box (16).