Lining plastic pipe cast iron pipe and manufacturing method thereof

Abstract

The invention provides a lining plastic pipe cast iron pipe and a manufacturing method thereof. The lining plastic pipe cast iron pipe comprises a cast iron pipe body and a plastic composite pipe material; the plastic composite pipe material is composes of an outer layer hot melt glue layer and an inner layer plastic pipe; the plastic composite pipe material is manufactured on line; the inner wall of the cast iron pipe body is subjected to sand blasting, shot blasting or shot throwing treatment after being ground; the plastic composite pipe material is pulled into the treated cast iron pipe body; the two ends of the plastic composite pipe material are subjected to sealing and gas filling; after heating treatment, cooling is performed; and the cast iron pipe body and the plastic composite pipe material are cemented, and trimming, spraying and marking are performed. The invention further discloses the manufacturing method of the lining plastic pipe cast iron pipe. By means of the lining plastic pipe cast iron pipe and the manufacturing method thereof, the defects of an existing cement mortar lining modular cast iron pipe and epoxy resin and epoxy ceramic lining modular cast iron pipes can be overcome, and the lining plastic pipe cast iron pipe is suitable for the water supply, fuel gas, water discharging, sewage discharging, heating and other fields, and is a most ideal water delivery pipe material product at present.

Description

technical field [0001] The invention relates to a plastic-lined cast iron pipe and a manufacturing method thereof. Background technique [0002] Existing ordinary cast iron pipes are often used as water supply pipelines because of their better overall performance. In order to solve the problem of corrosion resistance of cast iron pipes, the most common method is to use cement mortar lining or epoxy resin, epoxy Ceramic lining is the preferred anti-corrosion method for this type of pipeline; cement mortar lining is used as drinking water pipeline, because the inner wall is not smooth, the water flow resistance is large, and it is easy to scale, and the reaction substances produced by cement hardening affect the water quality. The thickness of the lining Larger, reaching 3-12mm, lower water delivery efficiency, cement lining causes the weight of the entire pipe body to increase, which is not conducive to construction and installation, and the cement lining is inconvenient to p...

AI Technical Summary

Problems solved by technology

[0002] Existing ordinary cast iron pipes are often used as water supply pipelines because of their better overall performance. In order to solve the problem of corrosion resistance of cast iron pipes, the most common method is to use cement mortar lining or epoxy resin, epoxy Ceramic lining is the preferred anti-corrosion method for this type of pipeline; cement mortar lining is used as a drinking water delivery pipeline, because the inner wall is not smooth, the water flow resistance is large, and it is easy to scale. The reactive substances produced by cement hardening affect the water quality, and the thickness of the lining Larger, reaching 3-12mm, the water delivery efficiency is low, the cement lining causes the weight of the entire pipe body to increase, which is not conducive to construction and installation, and the cement lining is inconvenient to process, poor adhesion, impact and pipe material during construction and installation Deformation can easily cause cement to fall off, and there are still many difficulties to be solved in the cement lining, so the cement lining is not a good lining method; the epoxy resin lining is used, because the lining layer is easy to delaminate, the material cost is high, and the environment The impact of harmful substances produced during the curing process of epoxy resin on water quality and human health is difficult to promote on a large scale. The use of epoxy ceramic lining, although it will have high adhesion and smoothness, is difficult to manufacture, complex equipment, and high cost. , can only be used for special projects, and cannot be widely used