An automatic harmful gas emission well lid

By using automatic hazardous gas emission manhole covers, sensors monitor and release hazardous gases, and sealing components isolate electrical sparks, the problem of explosions in underground pipe trenches is solved, ensuring safe and stable operation.

CN224549203UActive Publication Date: 2026-07-24CHENGDU HOLY LAND JIAYUAN ELECTROMECHANICAL EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHENGDU HOLY LAND JIAYUAN ELECTROMECHANICAL EQUIP CO LTD
Filing Date
2025-08-29
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Harmful gases can easily be generated in underground pipe trenches, and external sources of ignition or static electricity can easily enter, causing an explosion when the concentration of harmful gases reaches the explosive limit, which can seriously damage pipelines and threaten urban operations and safety.

Method used

Design an automatic hazardous gas emission manhole cover. The hazardous gas concentration is monitored by a hazardous gas sensor, and a servo motor drives an exhaust fan to discharge the hazardous gas. A sealing component isolates the hazardous gas from electrical components to prevent ignition by electrical sparks.

Benefits of technology

It effectively reduces the risk of harmful gas accumulation in the trench, avoids explosions, ensures the safety of pipelines and surrounding facilities, and reduces the impact on urban operations and loss of life and property.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224549203U_ABST
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Abstract

The utility model relates to the technical field of well lid, especially an automatic harmful gas exhaust well lid. It mainly aims at the underground pipe trench being easy to generate and accumulate inflammable and explosive harmful gases such as methane and hydrogen sulfide, when the concentration reaches the explosion limit, the fire source or static electricity can cause explosion, and the pipeline is damaged, and the following technical scheme is proposed: the fixed cylinder below the well lid, the first support ring fixedly connected to the inner side of the fixed cylinder, the cover plate set up above the first support ring, a plurality of groups of exhaust holes are formed in the cover plate; the exhaust mechanism is arranged below the first support ring, and the exhaust mechanism is used to exhaust the harmful gas in the pipe trench after starting; the sealing assembly is installed below the exhaust mechanism, the sealing assembly is internally provided with a storage battery, a harmful gas sensor and a control module, sensor data are transmitted to the control module, and the control module controls the start and stop of the exhaust mechanism according to the harmful gas concentration. The utility model can guarantee the safety of the pipeline in the underground pipe trench, eliminate hidden dangers, and protect the safety of ground buildings and pedestrians.
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