VIBRATION EXCITER FOR EQUIPMENT FOR PLACING CONCRETE INTO CAST-IN-PLACE PILES Russian patent published in 1997 - IPC

FIELD: bridge and civil engineering, construction of foundations by method "wall in ground", erection of moorage walls and underwater reinforced concrete blocks of water-development works. SUBSTANCE: vibration exciter for equipment placing concrete into cast-in-place piles includes frame, driving unbalanced shafts with immobile and mobile masses, drive of unbalanced shafts, catches of mobile masses. Frame is manufactured in the form of shell with upper and lower flanges for attachment of concrete casting tube and vibration compactor. Unbalanced shafts with masses are installed on outer side surface of shell in diametrically opposite positions. Immobile mass of each unbalanced shaft is fabricated in the form of two flat members placed with technological clearance between them for free movement of mobile mass. The latter is fitted with rest interacting with catch in extreme positions of mass. Drive of unbalanced shafts has individual hydromotor for each shaft. EFFECT: improved functional efficiency and reliability of vibration exciter. 3 dwg