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Safe Wellhead / Manhole Cover

Safe Wellhead
Safe Wellhead

In order to avoid pedestrian danger when the manhole cover is missing, the warning device combines a telescopic design and reflective color matching. When the manhole cover is lost for some reason, the device built into the well wall can be pulled up to form a circular platform above the vacant well surface, and it is equipped with reflective bars to serve as a warning. When the danger is removed, the device can be compressed back into the well, and a manhole cover can be laid above it without affecting normal traffic. The device is easy to disassemble and can be used immediately when a dangerous situation occurs, saving time.


Dalian Nationalities University

Dalian Minzu University
Dalian, China

Yujing Li,
Dalian Minzu University

Zining Dong,
Dalian Minzu University

Shimeng Sun,
Dalian Minzu University

Chenggang Huang,
Dalian Minzu University

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