HYDRAULICALLY OPERATED BUT MECHANICALLY DRIVEN & MECHANICALLY REVERSED SIMPLE CONCRETE PUMP

摘要

Disclosed is a hydraulic operated but mechanically driven & mechanically reversed simple concrete pump, wherein the said pump is provided with a mechanical arrangement which converts the rotary motion of a reduction gearbox (2) driven by a prime-mover (1) into a forceful self reversing reciprocating movement of a double acting hydraulic cylinder (4). The displaced oil due to this forceful action in turn operates another receiving cylinder (5) wherein the reciprocating force and stroke-length of the receiving cylinder (5) depends on the difference of the cross-section areas of the pistons of both the cylinders. The receiving cylinder (5) operates a rubber piston inside a pumping cylinder (7) which pumps during the forward stroke and sucks concrete in reverse stroke. The same oil also regulates the delivery & suction ports to achieve positive displacement of concrete. The rpm of the reduction gearbox (2) represents the no. of working strokes which can be changed simply by changing the prime mover rpm or by using a variable speed reduction gearbox (2).