Anticorrosive structure penetrating through external anticorrosive layer of pipe and preparation method thereof

Abstract

The invention discloses an anticorrosive structure penetrating through an external anticorrosive layer of a pipe. The structure mainly comprises a steel pipe (1) and an anticorrosive layer (2) which is covered on a surface layer of the steel pipe (1), and is characterized in that: a wear-resisting protection layer (3) is attached to the external surface of the anticorrosive layer (2). The invention also discloses a method for preparing the anticorrosive structure penetrating through the external anticorrosive layer of the pipe. As the wear-resisting protection layer is attached to the external surface of the anticorrosive layer of the steel pipe, the damage defect of the external anticorrosive layer of a buried pipeline which is easily caused by the friction and extrusion of hard rocks in a ground layer in the penetration process of the conventional buried pipeline polyolefin composite anticorrosive structure can be effectively overcome.

Description

technical field [0001] The invention relates to an anti-corrosion structure, in particular to an anti-corrosion structure in which a pipeline passes through an outer anti-corrosion layer and a preparation method thereof. Background technique [0002] At present, in the process of installing various buried pipelines (such as natural gas pipelines and oil pipelines), people often encounter obstacles such as buildings, roads, railways, rivers, and lakes. In order to ensure smooth installation, construction personnel will adopt various crossing construction methods such as directional crossing and pipe jacking crossing. Under normal circumstances, buried pipelines adopt two-layer or three-layer polyolefin composite anticorrosion structures, and the anti-corrosion layer of these anticorrosion structures has poor scratch resistance, and is vulnerable to hard rocks in the formation during the construction of buried pipelines. Friction and extrusion cause damage to the anti-corrosi...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect that the external anti-corrosion structure of the buried pipeline is easily damaged by rock friction and extrusion during the crossing process, and to provide a pipeline crossing that not only has a simple structure, but also can effectively prevent the anti-corrosion layer of the buried pipeline from being damaged Anti-corrosion structure of the outer anti-corrosion layer

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