Cathode protection system of river-crossing section pipeline

Abstract

The invention discloses a cathode protection system for a river-crossing pipeline, and the system comprises a river-crossing pipeline which is used for being buried below a riverbed so as to enable the river-crossing pipeline to pass through a river; the arrangement direction of the linear anode is consistent with the arrangement direction of the river penetrating pipeline, and the linear anode is used for being arranged on the surface of a riverbed and located under water of a river; and the underwater counterweight is connected with the linear anode and is used for positioning the linear anode on the surface of the riverbed. According to the invention, cathodic protection can be effectively carried out on a pipeline passing through a river.

Description

technical field [0001] The invention relates to the technical field of anticorrosion of pipelines, in particular to a cathodic protection system for pipelines crossing river sections. Background technique [0002] When long-distance pipelines pass through rivers, in order to save costs and meet the requirements of environmental protection, directional crossing is usually used for construction. Although directional crossing has the advantages of small working surface, small excavation volume, and small impact on the environment, in the process of pulling back the pipeline, especially in rock formations, problems such as unsmooth holes and low steering accuracy often occur, which will cause The anti-corrosion layer of the pipeline is damaged, and sometimes the metal pipe body is exposed. This damage is generally irreparable. In this case, it is inevitable that the anti-corrosion layer will be damaged in the directional drilling section, so it is very necessary to implement ca...

AI Technical Summary

Problems solved by technology

[0003] At this stage, since most of the crossing sections do not use available power at both ends, the conventional cathodic protection method is to install sacrificial anodes at both ends of the directional crossing pipeline for protection. This method is only suitable for small pipe diameters and short crossing buried Pipelines, for large-diameter pipelines, long crossing sections, many underground rock layers, and serious pipeline coating damage, there will be insufficient protection; even if the power supply conditions permit, deep well anodes are used at both ends of the pipeline The protection effect of the impressed current protection method is still to be discussed. As a difficult point of cathodic protection for crossing pipeline

Images