Speaking of, I think we are not very clear, ductile iron is a kind of spherical graphite, can improve the mechanical properties of cast iron, but also improve the toughness and plasticity. Do you know the size of nodular cast iron manhole cover? Let's take a look at it!
The specifications and specifications of nodular well covers can be divided into super heavy 400kN, ordinary 250kN and light 125kN。
Square well covers include 500 * 500b125, 500 * 500b125, 600 * 600b125, c250700 * 700b125, 450 * 750b125, c250700 * 800b125, etc。
3d捕鱼The requirements of different customers are different, and the models of manhole covers are different.
Spheroidal graphite manhole covers are generally divided into ring and square. In urban traffic law enforcement, annular covers are generally used. Because the annular well covers are not easy to skew, they can maintain the safety of non motor vehicles and vehicles.
The application of ring is mainly to fully consider the annular well cover. According to a diameter at the center point of the ring, the length of the diameter is the same. If it is rolled up by a passing car, the diameter is slightly wider than that of the shaft below, so the manhole cover is not easy to fall into the shaft.
If a square is selected, because the straight line of the square is obviously good at one of its circumference, when the well cover is rolled up, it is very easy to fall into the well along the straight direction of the shaft, leading to safety risks. If the wellbore is annular or significantly lower than the well cover, the square well cover is not easy to fall into the well. Here is a problem of using and saving raw materials.
The application of well cover lies in the size of the shaft。 If it is necessary to install a square well cover whose total area far exceeds that of the shaft, then the use and practical significance of raw materials are not immediately applied。 The annular well cover is more reasonable, which not only saves the raw materials of the well cover, but also ensures the safety of the shaft。
But in the countryside and the cable well use, generally chooses the square, that can prevent the precipitation and so on liquid to enter as soon as possible.
In areas where there is no need for the application of different specifications of ductile iron well covers, we can choose the appropriate specifications and models according to their own requirements.