HYDRAULIC PILE-DRIVING HAMMER Russian patent published in 2002 - IPC

FIELD: construction of pile foundations for buildings and structures. SUBSTANCE: proposed hydraulic pile-driving hammer has body, striking part, striking part guides, striking part hoisting hydraulic cylinder, hydraulic distributor, pressure hydraulic line with air-loaded hydraulic accumulator mounted on it and working and return hydraulic lines. Striking part hoisting hydraulic cylinder is provided with plunger on which rope block is fitted; ends of rope are secured respectively to body and to striking and body of plunger-type hydraulic is one of guides of striking part. Hydraulic pile-driving hammer is provided with loading hydraulic accumulator mounted on return line; body of this accumulator is second guide of striking part. Hydraulic distributor of pile-driving hammer is made in form of butt hydraulic distributor whose working line is directly connected with striking part hoisting hydraulic cylinder and butt plate of hydraulic distributor is combined with body of hydraulic hammer. EFFECT: enhanced reliability; simplified construction; reduced overall dimensions and mass of hydraulic hammer. 3 cl, 2 dwg