Manhole cover

Abstract

The invention discloses a manhole cover. The technical scheme mainly includes that peculiar smell of sewers is the most severe at the high temperatures, air can be expanded at the high temperatures by the aid of thermal expansion and cold contraction principles, a first piston can be pushed to move, drainage holes can be blocked by a sealing block piece, and accordingly the purpose of preventing odor can be achieved; the temperatures of the manhole cover can be reduced when drainage is required, so that air in a cavity can be contracted, the drainage holes are in circulation states at the moment, and influence on drainage can be prevented; high-pressure gas is stored in a gas storage tank by the aid of a driving mechanism in order to prevent the drainage holes from being blocked when vehicles pass the manhole cover, a switch mechanism can be switched on when the first drainage hole is blocked, sundries in the first drainage hole can be blown by air outlet holes, and the purpose of preventing the drainage holes from being blocked can be achieved. The manhole cover has the advantages that excellent effects of preventing the odor can be realized, the manhole cover has excellent drainage functions, and the drainage holes can be prevented from being blocked.

Description

technical field [0001] The invention relates to the field of municipal engineering equipment, more specifically, it relates to a well cover. Background technique [0002] When people walk in the city, they often ask about peculiar smells. These peculiar smells not only affect the appearance of the city, pollute the air, and are harmful to the human body, but also affect the mood of the walkers. By exploring the source of these odors, we can know that these odors come from the sewer, overflowing through the drain on the manhole cover. So we need to explore a way to stop the overflow of the smell. [0003] For example, a kind of anti-odor manhole cover mentioned in the Chinese patent whose notification number is CN202450618U adopts the technical scheme as follows: it includes a cover body, and the cover body is provided with circularly distributed water filtering holes, and the lower edge of the cover body faces inwardly. The curl hook is formed with an arc-shaped water stor...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned anti-odor well cover does not take into account the drainage function of the well cover, and the anti-odor ring formed by it will easily be blocked during the drainage process, thereby reducing the drainage function of the well cover

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