Metal tube taking plastic tube as liner and manufacturing method of metal tube

Abstract

The invention provides a metal tube taking a plastic tube as a liner and a manufacturing method of the metal tube. The metal tube taking a plastic tube as a liner comprises a metal tube and a plastic composite tube stock; the plastic composite tube stock is formed by an outer layer hot melting adhesive layer and an inner layer plastic tube; plastic composite tube stock is manufactured online, the inner wall of the metal tube is subjected to sand blasting and shot blasting or grit blasting after being polished, the plastic composite tube stock is pulled into the well-processed metal tube, and the two ends of the plastic composite tube stock are sealed and inflated and are placed in a sealed steam room or baking room to be heated, such that the metal tube and the plastic composite tube stock are adhered fixedly, and trimming and spraying are performed. The invention further comprises a manufacturing method of the metal tube taking a plastic tube as a liner. The sealed steam room or baking room is adopted for heating, the product quality is stable, and percent of pass is high; a plurality of or even different models and types of tube stocks can be heated simultaneously, the total heating time is less, the production efficiency is high, the energy consumption cost for product heating can be saved, plants and production devices for production can be saved more, and investment cost is reduced.

Description

technical field [0001] The invention relates to a plastic-lined metal pipe and a manufacturing method thereof. Background technique [0002] Existing metal pipes are often used as water supply and delivery pipes. In order to solve their anti-corrosion problems, the most common method is to use cement mortar lining or epoxy resin or epoxy ceramic lining in the pipes as the preferred anti-corrosion method for this type of pipes; The cement mortar lining is used as the drinking water delivery pipeline. Because the inner wall is not smooth, the water flow resistance is large, and it is easy to scale. The reaction substances produced by cement hardening affect the water quality. The thickness of the lining is relatively large, reaching 3-12mm, and the water delivery efficiency is relatively high. Low, the cement lining increases the weight of the entire pipe body, which is not conducive to construction and installation, and the cement lining is inconvenient to process and has poo...

AI Technical Summary

Problems solved by technology

[0002] Existing metal pipes are often used as water supply and delivery pipes. In order to solve their anti-corrosion problems, the most common method is to use cement mortar lining or epoxy resin or epoxy ceramic lining in the pipes as the preferred anti-corrosion method for this type of pipes; The cement mortar lining is used as the drinking water delivery pipeline. Because the inner wall is not smooth, the water flow resistance is large, and it is easy to scale. The reaction substances produced by cement hardening affect the water quality. The thickness of the lining is relatively large, reaching 3-12mm, and the water delivery efficiency is relatively high. Low, the cement lining increases the weight of the entire pipe body, which is not conducive to construction and installation, and the cement lining is inconvenient to process and has poor adhesion. The impact and pipe deformation during construction and installation will easily cause the cement to fall off, and there are still many cement linings. Difficulties to be solved, so cement lining is not a good lining method; epoxy resin lining is used, because the lining layer is easy to delaminate and fall off, the material cost is high, and the harmful substances produced during the curing process of epoxy resin are harmful to water quality and human body The impact on health is difficult to promote in a large area. Although the epoxy ceramic lining will have high adhesion and smoothness, it is difficult to manufacture, complex equipment, and high cost. It can only be used for special projects and cannot be widely used. application