OBSERVATION WELL HATCH Russian patent published in 2023 - IPC E02D29/12 E03F5/04 

FIELD: utilities.

SUBSTANCE: hatch of the observation well is designed for access to the observation wells of underground utilities. The hatch contains a housing (1) and a lid (2), each made in the form of a single pressed structure made of a polymer-sand composition. The housing (1) is made with a reinforcing frame, which is a ring (4) of profiled metal coaxially arranged in parallel planes, connected to each other. The cover (2) is made with a reinforcing frame in the form of a lattice of interconnected longitudinal and transverse bars (5) made of profiled metal with a diameter of 15-20 mm. The reinforcing frame of the lid (2) is framed by a ring of profiled metal. The hatch cover (2) is covered from below with a layer (7) of elastic polymer. The mass fraction of the metal reinforcement frame of the lid is 20-25% of the total mass of the lid.

EFFECT: invention enables to increase the strength of the hatch and an increase its service life.

3 cl, 2 dwg