A Drainage Method for Buried Metal Pipes Near DC Grounding Electrode

A metal pipeline, DC grounding technology, applied in the field of buried metal corrosion protection, can solve the problems of accelerated corrosion of pipelines, poor cathodic protection effect, etc. Effect

Active Publication Date: 2021-03-12
STATE GRID SHAANXI ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the corrosion protection of buried metal pipelines in the environment of DC grounding stray current, conventional cathodic protection is often ineffective, and even protection reversal occurs, which causes accelerated corrosion of pipelines

Method used

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  • A Drainage Method for Buried Metal Pipes Near DC Grounding Electrode

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0027] refer to figure 1 , a drainage metho...

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Abstract

The invention discloses a drainage method aiming at a buried metal pipeline near a direct-current grounding electrode, and relates to the field of corrosion prevention of buried metal pipelines, especially the field of corrosion prevention of the buried metal pipelines in a direct-current stray current environment. The drainage method comprises the following steps that the strength and direction of stray current borne by the metal pipeline near the direct-current grounding electrode are tested; the resistance rate of a soil medium where the metal pipeline near the direct-current grounding electrode is located is tested; drained current protection parameters are calculated; and field installation and parameter monitoring are carried out. The drainage efficiency can be improved, the engineering cost and the corrosion risks can be reduced, the anti-corrosion effect of the buried metal pipeline is guaranteed, and the service life of the buried metal pipeline is prolonged.

Description

technical field [0001] The invention belongs to the technical field of buried metal corrosion protection, and in particular relates to a drainage method for buried metal pipelines near DC ground electrodes. Background technique [0002] my country has a vast territory, and the energy distribution, power structure and economic development in various regions are unbalanced. The energy sources that can be developed and constructed mainly include thermal power, hydropower, wind energy and photovoltaics. Among them, thermal power with coal as a heat source is mainly distributed in the north, and hydropower is concentrated in the west. Inland, wind energy is concentrated in the northeast and the eastern coast, solar energy is mainly concentrated in Qinghai, Gansu, Ningxia and other regions, and load centers are mainly concentrated in the eastern coastal and southern regions. In order to meet the demand for electricity and oil and gas energy in the rapid economic and social developm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F13/02
CPCC23F13/02
Inventor 丁德吴健白晓春耿明昕申晨韩文刘钊郭安祥张小平冯南战张燕涛马悦红宋元锋刘磊平欣欣许莉李毅张峰王军娥南霄汉杨兵吴子豪
Owner STATE GRID SHAANXI ELECTRIC POWER RES INST
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