Composite profiled pipeline and manufacturing method thereof

Abstract

Provided are a composite profiled pipeline and a manufacturing method thereof. The composite profiled pipeline is a nonstandard pipeline and composed of an outer layer and an inner layer of a pipeline, wherein ceramic particle prefab bodies combined with the inner layer of the pipeline in casting mode are distributed in the inner layer of the pipeline at intervals, and the outer layer and the inner layer of the pipeline are combined in metallurgical mode. According to the composite profiled pipeline, the inner wall of the composite profiled pipeline has excellent abrasion performance, the outer wall of the composite profiled pipeline has good weld-ability, bonding properties of an interface between the inner wall and the outer wall of the composite profiled pipeline are good, and simultaneously cast infiltration properties among base metal and the ceramic particle prefab bodies are good, and therefore the base metal and the ceramic particle prefab bodies are firmly combined and difficultly to fall off, and the composite profiled pipeline is long in service life. Furthermore, the base metal in the inner layer of the pipeline can support the ceramic particle prefab bodies well, ceramic particles in the ceramic particle prefab bodies gradually protrude to bear main attrition during the wearing process and thereby effectively prevent surrounding base metal from being further abraded, and the composite profiled pipeline further has the advantages of being simple in structure and manufacture process, adjustable in structure and the like.

Description

technical field [0001] The invention relates to a composite special-shaped pipeline, in particular to a non-standard composite special-shaped pipeline suitable for dredging systems under severe working conditions and a manufacturing method thereof. Background technique [0002] Channel dredgers are important channel cleaning tools for dredging silt and silt, and their performance depends on dredging equipment. The transportation of materials is transported through long-distance pressure pipelines. The pipelines are subjected to erosion, impact, corrosion and wear of silt and sand, and the working environment is extremely harsh. Therefore, it is required that the parts used in the pipeline have good wear resistance, and the installation parts should have good weldability to obtain good toughness. [0003] Traditional material conveying pipes include bimetallic composite pipes, ceramic lined pipes and cast stone pipes. Among them, cast stone pipes have defects such as thick ...

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Problems solved by technology

In response to this situation, Chinese invention application CN102384316 discloses a bimetal composite pipe and Chinese utility model patent CN201071983Y discloses a three-layer composite wear-resistant pipe. Under abrasive conditions, prone to corrosion and wear

In view of this situation, the Chinese invention patent CN201225460Y discloses a wear-resistant pipeline lined with ceramic materials. This pipeline uses an integral ceramic tube as the inner tube, which effectively improves corrosion resistance and wear resistance. However, due to the High brittleness, its thermal expansion coefficient is very different from that of the outer sleeve, and it is very easy to fall off from the outer pipe

In response to this situation, Chinese invention application CN101900227 discloses a ceramic particle-reinforced composite material-lined metal pipe and its manufacturing method, but this kind of pipe adopts a centrifugal casting process, which is only suitable for making straight pipes with equal diameters, and cannot be used for making variable diameters and pipes. Shaped pipe

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