Well covers are used to cover roads or deep wells at home to prevent people or things from falling. According to the material, it can be divided into metal manhole cover, high-strength fiber cement concrete manhole cover and resin manhole cover. Generally use a circle. Can be used in green belts, sidewalks, motor vehicles, docks, alleys and so on.
He is an authentic farmer, but he invented a manhole cover with his own wisdom. This kind of manhole cover is mainly used for urban flood control, and now it is used in many cities.
He also won a national invention patent, and even CCTV interviewed him and praised him as an ordinary dreamer. Surprisingly, however, he only has a junior high school diploma.
He is a Shandong guy-Wang Di. So how did he invent this manhole cover? Where is the magic of this manhole cover? This issue of Ziya Tongqu Celebrity Watch takes you to know the story of this Shandong guy.
Occasionally, new ideas came to mind.
Wang Di was born in Chishui Village, Anton Wei Street, Lanshan District, Rizhao City, Shandong Province. After graduating from junior high school, he went out to make a living in society. However, due to his low educational level and little work experience.
Most of Wang Di's contacts are low-end industries: waiters, cleaners, security guards and other service jobs. He will go to almost any job that is not demanding and needs people.
In this way, boring life day after day, Wang Di for twenty years. He also wants to make changes, but because of his low level of education, he really doesn't know what to do, so the idea of changing has been stuck in his mind.
Finally, by chance, on a rainy day, Wang Di went out and found that every rainy day, the ground, especially the low-lying places on both sides of the road, was particularly prone to water accumulation.
Walking on the road, he kept thinking, there are not only rectangular nose wells on both sides of this road, but also many round wells. Why is there such deep water?
Moreover, a large amount of water accumulation is a problem that can easily cause urban waterlogging. Wang Di felt inexplicably sad about it. Because I have seen it many times, I slowly see the problem.
Because the manhole cover can't be opened in time, the garbage washed by the water blocks the sewer, so that the water can't enter the sewer and can only flow on the ground.
Coupled with global warming, abnormal climate, frequent heavy rainfall, limited urban road surface flood drainage system and sewer flood drainage technology, it is easy to cause too much water on the road surface and a series of disasters.
After discovering this problem, Wang Di began to devote himself to research. Although Wang Di only has a junior high school diploma, and his working life is very ordinary, he is actually a person who likes learning. So he studied manhole covers in his spare time.
He first looked up information on the Internet to learn about the basic situation of urban drainage system. In order to be more in line with the actual situation, he also visited sanitation workers to understand all the problems encountered by wells at present.
Through the visit, he learned the specific reasons of urban waterlogging: the main function of grate manhole cover is to filter garbage, and the lower part of grate manhole cover is connected with circular manhole cover.
After the rainwater filters out the garbage through the grate manhole cover, it will flow into the main pipeline under the circular manhole cover along the underground pipeline, because the lower part of the grate manhole cover is full of all kinds of garbage and silt. Once it rains,
Rain washed the garbage into the main pipeline, which led to the blockage of the main pipeline and the phenomenon of urban waterlogging. In addition, on the ground of drainage system in modern urban construction, most problems are solved through manhole covers.
However, because most of the manhole covers used at present are directly pressed against the sewer mouth without fastening by clamping devices, the drainage capacity of the sewer is insufficient when encountering high-intensity weather such as rainstorm, and the manhole covers are easily pushed away and washed away.
This has seriously affected people's life safety, and the manhole cover has small leakage holes, which can't clean up a large amount of accumulated water quickly, and it will also lead to more and more accumulated water.
Many attempts have been made to manufacture "hanging manhole covers"
Knowing the actual situation, he began to think of ways. He first collected relevant information on the Internet. Coincidentally, he saw the thing "hanging manhole cover".
It suddenly occurred to him that if the manhole cover could be raised, wouldn't it drain a lot of water? This is just a simple idea of his. After studying and consulting materials, he came up with the principle of "pendulum" and applied it to the foundation of "suspended manhole cover"
The manhole cover he designed is divided into four parts: manhole cover, base, fulcrum and container. When the weight of the manhole cover is greater than that of the container, the manhole cover is parallel to the ground.
When a large amount of rainwater overflows this container, the rainwater finally enters this container, which has only one drain.
At this time, water will accumulate more and more. Finally, this container weighs more than the manhole cover. The manhole cover can be tilted by lever principle, and then water will flow into the pipeline through the surrounding gaps.
Moreover, the innovation of Wang Di's idea is that the cover of the manhole cover can be made of high-hardness plastic to meet the function of low density and high strength.
When the buoyancy in the sewage is greater than gravity, the manhole cover will float, the sewage will flow down the sewer from the filter screen, and impurities will be filtered out of the filter screen. At the same time, an anti-deflection tube is designed to prevent the cover from deviating.
Wang Di's design not only solved the problem of garbage jam, but also solved the problems of water displacement and drainage speed. Of course, his design also has some shortcomings.
For example, the anti-deflection tube he designed did not fully consider the actual situation. In case of super bad weather, the deflection tube may be distorted and fail; The manhole cover he designed bounced up.
Although the displacement can be increased, the pop-up manhole cover may affect the driving of pedestrians and vehicles on the road, and even form a safety hazard.
Wang Di also understood that this problem must be taken seriously, because the model is only a model after all, and can't see the real situation, so he made a real manhole cover according to his own drawings.
During this period, Wang Di borrowed money from his friends for lack of funds, but he didn't want to give up. He revised it according to the existing problems. Finally, after repeated experiments and improvements, he solved the problem and made a manhole cover.
When he succeeded, he was very happy and excited. But he dare not be too happy. He immediately invited people from the Civil Affairs Bureau to watch his experimental results. This time, the urban Council was very satisfied with the results, and the manhole cover he developed also won the national patent.
Function of manhole cover
1, the bearing capacity of cast iron manhole cover is very high, which is far higher than the bearing requirements of ordinary pavement, so it can be used as a supporting structure and widely used in road green belts.
2. Anti-skid effect Because the density of cast iron is relatively high and the surface roughness is relatively high, it has a good anti-skid effect.
3. Anti-theft function Due to the serious theft in use, many areas use invisible manhole covers to ensure the smooth passage of people and vehicles.
4. Beautifying the environment is deeply loved by people because of its beautiful appearance and simple and smooth lines.
7, convenient to open due to weight reasons need special tools to open.
8, easy to maintain, if there is a fault, you can easily open it for inspection and maintenance.
9. Long service life The service life is generally 30-50 years.
The spheroidizing treatment of 10 ductile iron with strong corrosion resistance improves the plasticity and toughness of the material, which is beneficial to improve the wear resistance and corrosion resistance of the product.