The water-cooled metal centrifuge with de lavo method is used. The mold of Dg100 mm or less is cooled by a closed water jacket, and the mold of Dg150rnm or more is cooled by rain. When pouring, silicon-calcium alloy should be added to the inlet end of the flow plant for inoculation treatment. After each pouring, a thin layer of dry silicon-silica powder is sprayed on the inner surface of the mold with compressed air. The centrifuge is a two-and-a-half The closed casing composed of the part is mounted on the bottom of the casing, and the front end of the mold is sleeved with a ring gear. The DC speed regulating motor mounted on the bottom of the casing is directly driven by the gear, and the ends of the shell are closed. The mold is equipped with a sealing ring at the front of the casing, and a semi-circular acoustic full rae centrifuge with a mountain cylinder flipped at the front end of the casing is equipped with wheels to reciprocate on the inclined rail, and the reciprocating movement of the centrifuge is adopted. The hydraulic unit has a pressure of 9.65 x 105Pa. The moving speed is adjusted by the overflow valve. The cable and cooling water inlet and outlet hose of the centrifuge are generally fixed on the column beside the machine, and the other end is connected to the housing and moved together at random. The production specifications of the centrifuge are generally fixed. If several types of pipes are to be produced on one centrifuge, the fan-shaped bag, the molten iron planting and the roller frame supporting the mold need to be replaced.
As a new type of pipe, ductile iron pipe has the characteristics of good mechanical properties, metal saving, simple construction, economical cost, high reliability, good corrosion resistance and long service life. Its elongation is much better than that of gray cast iron pipe. After anti-corrosion treatment, the service life can reach 3-5 times of the steel pipe. Our centrifugal ductile iron pipe is easy to install and suitable for construction in various terrains and climates. The simple installation can greatly speed up the project schedule and reduce the engineering cost. It is widely used in tap water and gas pipelines, and its usage accounts for more than 90% of the output of cast iron pipes.
