Two-part or multi-part double-layer type wearproof impact-resistant tube and manufacture method thereof

Abstract

The invention provides a two-part or multi-part double-layer type wearproof impact-resistant tube. The wearproof impact-resistant tube comprises an outer protection tube (1) and an inner wearproof combined tube (2). The inner wearproof combined tube (2) is embedded in the outer protection tube (1) and comprises two or more tube walls which are spliced together to form a tube body with an annular cross section. The wearproof impact-resistant tube can be straight or bent. When the wearproof impact-resistant tube is straight, the upper portion and the lower portion of the inner wearproof combined tube are made of different materials; when the wearproof impact-resistant tube is bent, the big bend portion and the small bend portion of the wearproof impact-resistant tube are made of different materials. In conclusion, the inner combined tube of the wearproof impact-resistant tube is divided into at least two portions, and at least two portions are made of different materials. The wearproof impact-resistant tube of the structure has the advantages that service life can be prolonged, abrasive resistance and impact resistance can be enhanced and overall weight of the tube can be reduced.

Description

technical field [0001] The invention relates to a conveying pipe structure used in the fields of construction, mining, metallurgy, electric power, petroleum, coal, grain processing, etc., in particular to a two- or multi-layer double-layer wear-resistant and impact-resistant pipe and a preparation method thereof. Background technique [0002] The forming technologies of pipelines mainly include casting forming, compression molding, etc., which are formed by casting or hot and cold pressing process on the basis of forming molds; no matter what kind of machinery and equipment and pipelines, most of them use pipelines, Mainly used for oil, gas, liquid, powder, etc.; pipeline materials are cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics; in construction, mining, metallurgy, electric power, petroleum, In industries such as coal and grain processing, materials are conveyed through pipeline pressure, and the conveying pipe...

AI Technical Summary

Problems solved by technology

[0003] At present, the most widely used pipes are single-layer high manganese steel pipes, and double-layer high-chromium cast iron pipes are also used in a small number of cases; single-layer high-manganese steel pipes have poor wear resistance, low hardness, and low safety; the cost of double-layer wear-resistant pipes High, good quality, excellent wear resistance, high hardness, high safety, but not cost-effective

[0004] Chinese patent CN203023710U discloses a wear-resistant elbow; the wear-resistant elbow includes a body, and further includes a polymer elastomer layer arranged in the body, and the thickness of the polymer elastomer layer is within the thickness of the bend. The thickness of the tube is 3-15 mm in the middle section and 2-10 mm at the ends of said bend; Easy to wear, the polymer layer is easy to peel off under the scouring of the fluid, etc.

[0006] If the second inner curved part of the curved pipe adopts a half-pipe design, there will be a big problem in the installation firmness of the first outer curved tubular part and the second inner curved part, and at the same time the second inner curved part is an extension part. The problem of poor wear resistance; if the second inner curved part adopts a complete tube design, then the second inner curved part is made of the same material, which causes waste of material and affects economic efficiency

[0007] Therefore, the existing pipe fitting preparation methods and corresponding pipe fittings have high cost, poor wear resistance and short service life.

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