Dehydration mechanism of filter-cloth-free perpendicular-compression high-pressure sludge dehydrator

The utility model belongs to the technical field of sludge treatment and provides a dehydration mechanism of a filter-cloth-free perpendicular-compression high-pressure sludge dehydrator. The dehydration mechanism of the filter-cloth-free perpendicular-compression high-pressure sludge dehydrator comprises a dehydration cavity formed by upper-and-lower arrangement and integral connection of a plurality of annular dehydration pieces (8), wherein each annular dehydration piece (8) is provided with two lugs which extend outwards and are arranged symmetrically; every two upper-and-lower adjacent annular dehydration pieces (8) are placed in a crossed manner, so that the plurality of annular dehydration pieces (8) which are arranged in an upper-and-lower manner are divided into two groups, and the lugs of the annular dehydration pieces (8) in each group are arranged in an upper-and-down corresponding manner; clearance gaskets (12) are arranged among the lugs of every two upper-and-lower adjacent annular dehydration pieces (8) in each group; driving mechanisms for driving the two groups of annular dehydration pieces (8) to rotate by certain angles relatively are arranged; a backwashing channel is formed between the side wall of a dehydration cavity base and the dehydration cavity. The dehydration mechanism has the characteristics of high working efficiency and low labor intensity.