HEAD OF PILE DRIVING HAMMER Russian patent published in 2010 - IPC E02D7/00 

FIELD: construction.

SUBSTANCE: invention is related to mining and construction industry and may be used in powerful hammers for submersion of reinforced concrete piles and pile shells. Head of pile driving hammer comprises body of two parts and guide, arranged in upper part of pile driving hammer head and installed tightly, but movably between striker mass and body of pile driving hammer itself. In lower part of pile driving hammer head there is main hydraulic cylinder installed with piston, as well as auxiliary hydraulic cylinders with pistons. Main hydraulic cylinder is installed onto pile end with its piston, and pistons of auxiliary hydraulic cylinders are pressed to side surfaces of pile. Head is equipped with hydraulic system for reliable pressing to pile and even distribution of high impact forces. Hydraulic system of head consists of cavities and hydraulic cylinders of hydraulic lines of check valves in closing cocks of lever element for their switching in oil tank. Specified hydraulic system, without application of special hydraulic plants for high pressures, provides for reliable clamping of pistons to pile end and its side surface, which provides for submersion of piles without their damage in soils of any density. Head equipping with guide provides for its reliable operation in impact modes and in process of pile insertion into head in the beginning of operation. Hydraulic system is equipped with two stop valves of their switching lever element, which, by simple operation of their switching, releases pile from clamp and prepares head of pile driving hammer for work with another pile. It means that objectives of reliable piles submersion are completely achieved.

EFFECT: improved reliability of reinforced concrete structures driving process.

1 dwg