There are many types of manhole covers, single-layer, double-layer, cast iron manhole covers, ductile iron manhole covers, composite manhole covers, cement concrete manhole covers and so on. Among them, nodular cast iron manhole covers are the most widely used.
Ductile iron manhole cover level signs are set for occasions Light Q Green spaces, ramps, bicycle lanes, or sidewalks where motor vehicles are not allowed to enter General P steam level 10 or below Roads or parking areas Heavy-duty Z Roads or parking covers It is used to cover defenses on roads or in deep wells in homes, to prevent pedestrians or objects from falling. The design of Xushui cast iron manhole cover manufacturers is generally divided into circular and square. In urban traffic management, circular is generally used because circular manhole covers are not easy to tilt and can better protect the safety of pedestrians and vehicles.
The use of circular is mainly considered that the diameter of the circular manhole cover through the center of each circle is the same, so if the manhole cover is rolled up by the passing vehicle, because the diameter will be slightly larger than the wellhead below, Wide, the manhole cover will not fall into the wellhead. If a square is adopted, the diagonal of the square is obviously longer than the length of each side. When such a manhole cover is rolled up, it is easy to fall into the well along the diagonal direction of the wellhead, causing hidden safety hazards. Xushui cast iron manhole cover manufacturers introduced that if the wellhead is made round or significantly smaller than the manhole cover, the square manhole cover will not fall into the well. This involves the issue of maximum utilization and savings of materials. The use of a wellhead depends on the size of the wellhead. If you have to install a square manhole cover that is much larger than the wellhead, then the use and practical value of the material is naturally more effective than directly using a round manhole cover. Ensure the safety of the wellhead. In the countryside and cable wells, squares are generally used, which can better prevent the ingress of liquids such as rainwater.