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How to install the ductile iron manhole cover correctly?
Source: clab66.cn Release time: 10:16:12, November 3, 2023
How to correctly install ductile iron manhole cover? In order to better ensure the normal use of nodular cast iron manhole covers, attention should be paid to the installation quality to ensure that the specifications and models are accurate, the installation is firm, the opening is convenient and fast, and the surface is clean and unique. According to the technical standards for inspection of pig iron well covers, what are the special advantages of cast iron ductile well covers? Nodular cast iron manhole cover manufacturers.
1、 The well chamber, engineering reinforcement well circle and well frame shall be as appropriate as possible.
Second, before installing the manhole cover, carefully check whether the type, specification, model and structure of the manhole cover meet the design standards, and check whether it is damaged or cracked.
Thirdly, nodular cast iron well frame, well cover and parts shall be installed firmly, stably and in proper position as far as possible. It shall be ensured that it is intact.
Fourth, try to use commercial precast concrete; When the cast-in-place concrete time is insufficient, early strength and rapid setting concrete shall be used; The concrete shall be vibrated as strongly and compactly as possible, and closely combined with the ground structure.
Fifth, the foundation pit shall be cleaned of the block material surface layer at the well chamber, and the base material shall not shock the nearby pavement structure.
Sixth, before the cast-in-place concrete of the nodular cast iron well ring, according to the evaluation design elevation, what special competitive advantages of the nodular cast iron well cover can stabilize the well frame; As far as possible, the hollow floor of the well shall be formed with formwork.
Seventh, the number of embedded bolts shall not be less than 6; If the embedded bolts cannot be installed, try to use other methods to strengthen the well frame, such as expansion bolts or wire mesh.
Cast iron ductile iron manhole cover is a kind of ductile iron product. Ductile iron is spherical forged petroleum coke obtained from gray iron and manufacturing treatment, which improves the technological properties of cast iron, especially the plastic deformation and plasticity, thus obtaining higher tensile strength than carbon steel. The core components of ductile iron manhole cover are carbon and silicon.
How is the cast iron ductile well cover made? Let me introduce you. The production of cast iron nodular graphite well covers has strict requirements on composition and carbon silicon content. The carbon and silicon content of the primary molten iron shall be higher than that of the gray cast iron. For manganese, phosphorus and sulfur, a small amount of elements in nodular cast iron should be reduced.
In order to better ensure the normal use of pig iron well cover, it should be installed according to the technical standards for pig iron well cover inspection.
Lightweight and high toughness: FRP anticorrosive grid is made of epoxy resin and FRP, with low relative density. The relative density of FRP corrosion protection grid is 1/4 of steel and 2/3 of aluminum, but the compressive strength is 10 times that of rigid PVC, and the compressive strength is more than that of aluminum profile. The horizontal weight of ordinary steel is light, which can greatly reduce the basic support points and reduce the raw material cost of the project. The laser cutting installation is simple, without hot work and large and medium-sized hoisting machinery and equipment. As long as everyone needs fewer pneumatic tools, the installation cost will be greatly reduced.
Is the floor of nodular cast iron manhole cover anti-skid? After all, the rainfall temperature here is relatively low, and the ground is relatively muddy. If we do not pay attention to the difficulty of raw materials, the drain well cover may go astray due to the difficulty of raw materials.
If you pay a little attention to the ductile iron manhole cover on the road, you will find many texture schemes on its appearance. The design of this texture scheme is not only beautiful, but also has a good expected effect on the ground anti-skid, especially in rainy or snowy days. Because the surface of the drain well cover is smooth, passers-by may walk on it carelessly and cause bruises. In order to better avoid injuries to passers-by, we attach great importance to this aspect when designing ductile iron manhole covers, which should not only have a good decoration design expected effect, but also have the expected ground anti-skid effect.
