Manhole cover, a public facility that can be seen everywhere in the city. Perhaps most people have no special impression of it, except for its gray-black and rustic appearance.

However, this simple manhole cover is as beautiful as a work of art in Japan, which makes people have to accept the level of Japanese art.

In Japan, the art manhole cover has become a distinctive city card. Manhole covers are rich in patterns, with guiding functions and various commemorative meanings. The manhole cover is decorated with colorful patterns, telling you what is the most famous and interesting city, or the history of the city. Thinking about it carefully, in a small and fresh Japan, it seems that even ordinary things can become unique and fresh.

The manhole cover is the wall leading to the top of the entrance and exit of the underground facility. In order to meet the requirements of daily maintenance, inspection wells are set up at road turns. The inspection well can not only withstand the high-speed and large flow of traffic vehicles, but also prevent vehicles, pedestrians and foreign objects from entering, ensuring the normal operation of equipment maintenance. At present, nearly 80,000 street lampshades in Changsha are basically square manhole covers. After years of observation, combined with operation and maintenance experience, it has been discovered that the traditional square manhole design has many drawbacks. With the continuous development of science and technology, urban road lighting facilities have also been continuously improved and innovated, and it is urgent to break the original design concept.

Comparison of square manhole cover and round manhole cover

2. Composite resin material

Composite resin is suitable for use in areas with strong acidity. The epoxy resin trench cover is very light and easy to install. The trench cover plate made of new composite resin is no less than high-carbon steel and has stronger corrosion resistance. Therefore, the composite resin trench cover is a common method for many pharmaceutical factories and sewage treatment stations to solve acid and alkali wastewater.

Before choosing the trench cover, people must understand the characteristics of the material to ensure that the cover can give full play to its use value in the whole process of practical application.

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