Corrosion-resistant spheroidal graphite cast iron pipe

Abstract

The invention discloses a corrosion-resistant ductile iron pipe, which comprises a pipe body socket, a ductile iron cover, an external cast iron pipe, a ductile iron pipe body, an apron ring, bolts, an acid-base regulator storage ball, a connecting pipe, an anti-corrosion Corrosion layer, cement lining, external anti-erosion layer, penetration hole. The beneficial effects of the present invention are: the lining cement layer can protect water quality, reduce head loss, improve the service life of T-shaped ductile iron pipes, the anti-corrosion layer can improve the anti-corrosion ability of acid-base components in sewage, and the external anti-corrosion layer It can protect the erosion of ductile iron pipes buried under the soil for a long time, and further improve the corrosion resistance of T-shaped ductile iron pipes. The acid-base regulator storage ball is stored in the acid-base regulator, which is used to neutralize the acid-base in sewage Composition, reducing the corrosion of the inside of the ductile iron pipe, the invention effectively ensures the service life of the ductile iron pipe, and at the same time provides convenience for subsequent sewage treatment.

Description

technical field [0001] The invention relates to a corrosion-resistant ductile iron pipe. Background technique [0002] T-type ductile iron pipe is used to transport water, gas, air, oil and heating steam and other daily high-pressure fluids and other uses. Well, the price is one level lower. The casting process of ductile iron pipes includes continuous casting method and water-cooled centrifugal casting method. Among them, the water-cooling method is a modern art. Compared with ordinary cast iron pipes, the ductile iron technology of different processes not only maintains the corrosion resistance of ordinary cast iron pipes, but also has High strength, good toughness, thin wall, light weight, impact resistance, large bending function, easy installation, etc., and it has also been well implemented and used in China. [0003] Although the existing domestic ductile iron pipes used for sewage transportation have an anti-corrosion layer, they are inevitably corroded, but the co...

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Problems solved by technology

[0003] Although the existing domestic ductile iron pipes used for sewage transportation have an anti-corrosion layer, they are inevitably corroded, but the corrosion rate is slow, but the acid-base in the sewage is seriously unbalanced, and the amount of sewage is large. Long-term corrosion slowly destroys the ductile iron pipes. The internal structure of the cast iron pipe, and it is troublesome to replace the sewage pipe. Therefore, a corrosion-resistant ductile iron pipe is proposed to solve the above problems

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