When short-term heavy rainfall occurs in the city, the urban drainage system is easily paralyzed, and even rainwater flows back and the manhole cover is washed away, causing irreparable harm. So in order to solve this problem. In this design, the structure of the original manhole cover is improved, and it is designed to be lifted and unfolded. When solving the structural problem of how to unfold the manhole cover, the unfolded part is added with a warning function device to remind passing vehicles and pedestrians.
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I'm thinking about a question. I rely on the water pressure to control myself. What if a car suddenly rises?
Maintenance costs feel high
It's very good. I also found the problem of manhole covers before, but I didn't think about it carefully. I think it's very good to see your work today. I 'd like to give you a compliment . personally, I think it is necessary to add an anti-theft, although stealing manhole covers is rare now.
There is still one more thing to filter garbage.
This is a good idea
In the future smart city, every manhole cover can be operated remotely, ha, ha, ha
Not bad ~