Plastic-lined socket and spigot coast iron pipe and manufacturing process thereof

Abstract

Disclosed are a plastic-lined socket and spigot coast iron pipe and a manufacturing process of the plastic-lined socket and spigot coast iron pipe. The plastic-lined socket and spigot coast iron pipe comprises a cast iron pipe, a glue layer and a lining. A blank is manufactured in an on-line mode through the lining and the glue layer and is then subjected to on-line operation through deformation, stretching, heating and expansion, and therefore the technical scheme of integral bonding of the cast iron pipe and lined plastic is achieved, and the defects that because a cement mortar lining or an epoxy ceramic lining is adopted for an existing ordinary cast iron pipe, the inner wall of the existing ordinary cast iron pipe is not smooth, water flow resistance is large, scaling can happen easily, water quality is affected by reaction objects generated by cement hardening, the lining is large in thickness, water conveying efficiency is low, installing and construction are difficult, manufacturing difficulty is large, equipment is complex and cost is high are overcome; the plastic-lined socket and spigot coast iron pipe is suitable for water, gas and oil conveying of all municipal engineering and industrial and mining enterprises, is particularly suitable for water supply in municipal engineering and is a preferential water conveying pipe product.

Description

technical field [0001] The invention relates to a plastic-lined socket-type cast iron pipe and its manufacturing process. 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 ceramic lining in cast iron pipes It is the preferred anti-corrosion method for this type of pipeline; the 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 is relatively large. If it reaches 3-12mm, the water delivery efficiency is low. The cement lining will increase the weight of the entire pipe body, which is not conducive to construction and ins...

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 corrosion problem of cast iron pipes, the most common method is to use cement mortar lining or epoxy ceramic lining in cast iron pipes It is the preferred anti-corrosion method for this type of pipeline; the 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 is relatively large. If it reaches 3-12mm, the water delivery efficiency is low. The cement lining will increase the weight of the entire pipe body, which is not conducive to construction and installation. Moreover, the cement lining is inconvenient to process and has poor adhesion. It is easy to cause falling off during construction and installation. The cement lining There are still many difficulties to be solved, so the cement lining is not a good lining method; although the epoxy ceramic lining will have high adhesion and smoothness, it is difficult to manufacture, the equipment is complicated, and the cost is high. It can be used in special projects and cannot be widely used

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