MANHOLE HATCH FRAME OF VARIABLE HEIGHT Russian patent published in 2024 - IPC E02D29/12 E02D29/14 

FIELD: sewage facilities.

SUBSTANCE: invention relates to a manhole hatch frame made with possibility of changing the height of the manhole hatch location. Frame comprises support ring, intermediate ring and hatch cover. Intermediate ring is formed by coaxially located lower and upper annular segments, which are made integral with each other, which form a stepped transition between the lower and upper annular segments. Bottom annular segment can be arranged in support ring. Upper annular segment is made with possibility of placement of hatch cover in it. Ratio of diameters of annular segments, support ring and hatch cover are made with the possibility of placing the intermediate ring on the support ring similarly to the hatch cover arrangement on the support ring without said intermediate ring and the manhole cover on the intermediate ring, as well as hatch cover would be located on support ring. Stepped transition forms support surface for placement of hatch cover on it. Height of hatch frame is provided by height of intermediate ring due to height of stepped transition and/or height of lower annular segment. Outside on lower annular segment there are radial projections corresponding to recesses in radial projections of support ring. In the upper annular segment there are radial projections with recesses, mating projections on the side surface of the hatch with the possibility of mutual alignment of projections and recesses during installation of the frame.

EFFECT: providing the possibility of creating a frame of a manhole of a sewage well of variable height with simplified assembly/disassembly in terms of time and complexity.

7 cl, 9 dwg