Compound type antitheft well lid

Abstract

The invention discloses a compound type antitheft well lid which comprises a lid base, a lid body and an ejecting device; the lid base is of cylindrical shape with a through hole at the center; a plurality of annular slots parallel to the top surface are formed on an inner wall of the through hole; vertical connecting slots are formed between the annular slots; notches connected with the annular slots or the connecting slots are formed on a side wall of the lid base; the lid body comprises a circular lid main body and a plurality of bulges located on the edge of the lid main body. When the well lid is closed, the lid body is located in the annular slots on the top layer of the lid body; the ejecting device is located under the lid base in the well and is used for supplying upward pressureto the lid body; the well lid can be opened by separating the lid body along an appointed route in a labyrinth type slot channel, and the lid body cannot be taken out from upper and lower openings ofthe lid base, so that the well lid can be prevented from being lost or stolen; the ejecting device is used for supplying an upward acting force to the lid body, so that the thief cannot separate the lid body from the labyrinth type slot channel by directly rotating or pressing down.

Description

【Technical field】 [0001] The invention relates to the technical field of manhole covers, in particular to the technical field of a composite anti-theft manhole cover. 【Background technique】 [0002] Underground drains and underground pipeline passages are generally provided with inspection wells, and inspection well covers are installed at the entrances of inspection wells. The manhole covers arranged on urban roads and sidewalks are mostly made of rolling-resistant cast iron due to the need to withstand a large amount of rolling. Manhole covers made of cast iron are very easy to be stolen due to their certain recycling value and imperfect anti-theft measures. The theft of the manhole cover can also cause the loss or damage of articles in the underground pipeline, such as cables or pipe fittings in the underground pipeline of the electric power or communication department, thus causing a series of property losses. In addition, the loss and damage of the manhole cover will ...

AI Technical Summary

Problems solved by technology

The theft of the manhole cover will also cause the loss or damage of items in the underground pipeline, such as cables or pipe fittings in the underground pipeline of the electric power or communication department, resulting in a series of property losses

In addition, the loss and damage of manhole covers will threaten the safety of pedestrians or vehicles walking on the road, and even cause casualties

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