Automatic exhaust sewer well cover

Abstract

The invention specifically relates to an automatic exhaust sewer manhole cover, comprising a manhole cover body, an exhaust fan, a methane sensor, a time controller, an alarm, a power supply, electric wires and an exhaust pipe. The manhole cover body is a hollow structure, and the exhaust gas The fan and the methane sensor are installed in the body cavity of the well cover, the time controller, alarm and exhaust pipe are installed outside the body of the well cover, the power supply is electrically connected to the time controller, and the time controllers are respectively passed through The electric wires are connected to the exhaust fan, the methane sensor and the alarm, and the electric wires pass through the exhaust pipe; the present invention uses a time controller to control the exhaust fan to work at regular intervals to monitor the biogas in the sewer manhole cover. Discharge, regularly reduce the biogas concentration in the sewer manhole cover, and a methane sensor is installed to detect the methane concentration in the sewer manhole cover. When the concentration exceeds the limit, the exhaust fan starts to work, and the methane concentration does not drop below the set value after exhausting for a period of time ,Send out a warning.

Description

technical field [0001] The invention relates to a sewer manhole cover, in particular to an automatic air-venting sewer manhole cover. Background technique [0002] The city sewer manhole cover is used to prevent pedestrians from falling into the sewer, and it can also prevent the garbage on the street from falling into the sewer and cause blockage. The sewer manhole cover is provided with drainage holes, which can drain the rainwater on the street. The drainage holes can also play a role in natural drainage. However, the effect of natural exhaust through drainage holes is not obvious, which leads to the accumulation of methane in the sewer, and it will cause an explosion as long as it encounters sparks. Especially during the Spring Festival, children often like to throw firecrackers into the sewer manhole cover, which is more likely to cause explosions and cause fatal accidents. [0003] It can be seen from the lessons of previous accidents that how to eliminate the methane...

AI Technical Summary

Problems solved by technology

[0002] The city sewer manhole cover is used to prevent pedestrians from falling into the sewer, and it can also prevent the garbage on the street from falling into the sewer and cause blockage. The sewer manhole cover is provided with drainage holes, which can drain the rainwater on the street. The drainage holes can also play a role in natural drainage. The role of gas, but the effect of natural exhaust by drainage holes is not obvious, which leads to the accumulation of more and more methane in the sewer, as long as it encounters sparks, it will cause an explosion

Especially during the Spring Festival, children often like to throw firecrackers into the sewer manhole cover, which is more likely to cause explosions and cause fatal accidents

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