Waterproof manhole cover

Abstract

The invention discloses a waterproof manhole cover which comprises an upper manhole cover layer and a lower manhole cover layer. The manhole cover is mounted in a base. The inner side wall of the baseis of a stepped structure formed by a first step and a second step. The upper manhole cover layer is mounted on the first step. The lower manhole cover layer is mounted on the second step. The uppermanhole cover layer comprises a surface layer, a middle reinforcement layer and a bottom layer. The top face of the upper manhole cover layer is an outwards-convex arc face with the circle center located in the center axis of the manhole cover. The middle reinforcement layer is formed by multiple lines of staggered M-shaped reinforcement ribs filled with filling materials. The upper end face of the first step is an inclined face gradually lowered towards the periphery, and first drainage grooves are formed in the inclined face. A second shallow groove used for waterproof strip mounting is formed in the inner side of the upper end face of the second step. According to the waterproof manhole cover, the anti-pressure ability of the upper manhole cover layer can be improved, and the waterproofmanhole cover is solid, durable and good in waterproof performance.

Description

technical field [0001] The invention belongs to the technical field of municipal road construction, and in particular relates to a waterproof manhole cover. Background technique [0002] At present, in urban engineering construction, there are many kinds of composite manhole covers. During the installation process of the manhole cover, the manhole cover is placed on the manhole cover base. In order to facilitate maintenance, the upper and lower layers are generally separated. The trampling and rolling of time, the separation of the manhole cover and the manhole cover base, or the rollover of the manhole cover and the manhole cover base will make the manhole cover and the manhole cover base not fit tightly. Seriously damaged; although some manhole covers have reinforcement devices, but because the bottom is not easy to see when the manhole cover is installed, the reinforcement device is inconvenient to install, time-consuming and laborious; the lower manhole cover has a water...

AI Technical Summary

Problems solved by technology

[0002] At present, in urban engineering construction, there are many kinds of composite manhole covers. During the installation process of the manhole cover, the manhole cover is placed on the manhole cover base. In order to facilitate maintenance, the upper and lower layers are generally separated. The trampling and rolling of time, the separation of the manhole cover and the manhole cover base, or the rollover of the manhole cover and the manhole cover base will make the manhole cover and the manhole cover base not fit tightly. Seriously damaged; although some manhole covers have reinforcement devices, but because the bottom is not easy to see when the manhole cover is installed, the reinforcement device is inconvenient to install, time-consuming and laborious; the lower manhole cover has a waterproof function, but most of the traditional waterproof manhole covers use metal manhole covers, cement Concrete manhole covers, resin manhole covers, etc. These manhole covers have poor sealing and waterproof performance, and are not easy to install

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