| 摘要 |
PURPOSE: An apparatus for sewage screening using hydraulic multistage lifting device is provided which is accurately operated regardless of water depth and flow rate, and which solves problems such as frequent stretching or damage of wire. CONSTITUTION: The apparatus for sewage screening using hydraulic multistage lifting device comprises a multistage ascent and descent hydraulic cylinder(11) in which a plurality of cylinders are formed in multistage so that the cylinders are ascended or descended by force of hydraulic operation in a multistage slide beam(13) coupled to a collecting shovel, which is reciprocally slid in each cylinders so that the multistage ascent and descent hydraulic cylinder(11) is expanded and contracted, catching parts(81,82,83) are formed on the lower portion of each of the cylinders, upper projections a central inner part of which is perforated are formed on an upper portion of each of the cylinders, and an injection port(65) and fluid entrances are respectively formed on the upper part of the cylinders connected in multistage and the lower portion of each of the cylinders to flow in and out a hydraulic oil; and a multistage antenna cylinder(12) in which a plurality of cylinders with hose function for transferring the hydraulic oil are formed in multistage so that the multistage antenna cylinder(12) is cohesively coupled onto the longitudinal side surface of the multistage ascent and descent hydraulic cylinder(11) by adaptors the inner part of which is perforated in such a way that the multistage antenna cylinder(12) is expanded or contracted together with the multistage ascent and descent hydraulic cylinder(11), and an injection port(66) and fluid entrances are respectively formed on the upper part of the cylinders formed in multistage and the lower portion of each of the cylinders to flow in and out the hydraulic oil.
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