Manhole orifice cover

Abstract

The invention discloses an orifice cover for a manhole, which includes a sleeve and a clamping mechanism inside the sleeve; the sleeve includes a ring body and an annular platform placed on the upper end of the ring body, and the outer diameter of the ring platform is larger than that of the human body. The aperture of the hole; the inner side of the annular body is provided with more than one chute, the chute is provided with a slider, and the slider includes a slider body and a connecting block with holes extending from the two ends of the slider body; clamping The mechanism includes springs, fastening bolts, nuts and two hinges with through holes. The slider connects the two hinges with through holes through the pin shaft, so that the two hinges form a hinge; After the fastening bolt passes through the holes on the two hinge sheets, the hinge forms an opening, and the spring is horizontally arranged in the opening. The opening of the invention is a horizontal surface, which will not affect the measurement of the water level gauge; the invention is provided with a clamping mechanism for clamping and fixing the measuring line, so as to reduce the influence of the sliding of the measuring line and the inflection point of the measuring line on the monitoring accuracy.

Description

technical field [0001] The invention belongs to the field of geological disaster monitoring and design, and in particular relates to a manhole hole cover. Background technique [0002] Groundwater level monitoring is particularly important to the prevention and control of geological disasters. At present, a large number of groundwater level monitoring work has been carried out at home and abroad. The distribution of groundwater level in the landslide body directly affects the distribution of saturation of the landslide body, and engineering problems such as the calculation of hydrodynamic pressure play a vital role in the calculation of landslide stability and risk control. In terms of mechanism research, the research on the response relationship between groundwater level, rainfall and reservoir water level has received extensive attention. [0003] At present, fully automatic (semi-automatic) groundwater monitoring equipment is mainly used, that is, a pressure sensing prob...

AI Technical Summary

Problems solved by technology

However, the preparation of the existing hydrological holes and the installation of the water level gauge are particularly rough. The orifices of the hydrological holes are often uneven due to manual pipe cutting, so when measuring, the measurement error is relatively large; the installation of the water level gauge is often not uniform. When the cover is installed, there are often problems such as the measurement line slipping and the breaking point of the measurement line being worn, which directly affects the monitoring accuracy.

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