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Pipeline outer wall anti-corrosion cathode protection device and construction installation method of filling material thereof

A technology for pipeline outer wall and cathodic protection, applied in pipeline anticorrosion/rust protection, pipeline protection, damage protection, etc.

Inactive Publication Date: 2010-06-30
上海青草沙投资建设发展有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ensuing problem is that the construction and installation method of the anti-corrosion cathodic protection device for the outer wall of the pipeline and its packing material is an urgent problem that people need to solve

Method used

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  • Pipeline outer wall anti-corrosion cathode protection device and construction installation method of filling material thereof
  • Pipeline outer wall anti-corrosion cathode protection device and construction installation method of filling material thereof
  • Pipeline outer wall anti-corrosion cathode protection device and construction installation method of filling material thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] The construction and installation method of the anti-corrosion cathodic protection device for the outer wall of the pipeline and its packing material. The process pipeline is a pipeline for pipe jacking construction in sections, and the sections are fixed together by welding; The sacrificial anode protection device 3 on the outer wall, the entire pipeline is provided with a protective coating; the main points are:

[0085] 1) After the joints are welded and coated with the joint coating, the installation method of the sacrificial anode protective device for the corrosion control of the outer wall of the pipeline is specifically as follows:

[0086] First, use the grouting hole on the pipe wall of the pipe 1 or punch a hole in the pipe as the installation hole, and inject the pasty sacrificial anode filling material into the hole;

[0087] Then, install the sacrificial anode protection device 3 from the inside of the pipeline to the outside of the pipeline: install the s...

Embodiment 2

[0113] The content of this embodiment is basically the same as that of Embodiment 1, and its difference mainly lies in:

[0114] The mass percentage composition of the pasty sacrificial anode filling material meets the following requirements: bentonite: gypsum powder: industrial sodium sulfate=20:75:5.

[0115] The plug 6 is riveted or welded to the supporting steel rod as the supporting connection part 301 ; the plug 6 and the pipe 1 are connected by welding or clamping.

[0116] The outer wall coating of the pipeline is specifically fused-bonded epoxy high-performance and long-life pipeline coating (SEBF1-7 series coatings produced by the Institute of Metal Research, Chinese Academy of Sciences, which are commercially available products); SEBF1-7 series coatings are suitable for different pipelines , can be selected according to the specific situation.

[0117] The coating materials used for jointing on the outer wall of the road can be:

[0118] The SEBF1~7 series of fusi...

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Abstract

The invention relates to a pipeline outer wall anti-corrosion cathode protection device and a construction installation method of a filling material thereof; the method is characterized in that: after joint coating is welded and coated among all pipeline joints, the installation method of the anode loss protection device for pipeline outer wall corrosion control is as follows: firstly, pasty sacrificial anode filling material is injected in a mounting hole; and then the anode loss protection device (3) is arranged from inside of the pipeline to outside of the pipeline; then a stopper (6) is used fix a support steel rod on the pipeline (1). The invention can ensure the endurance of the pipeline pushing construction, greatly saves the installation workload and installation cost, can achieve long-acting protection through one-time construction, meets durability requirements of large-scale engineering construction and have great predictable economic and social values in the engineering application.

Description

technical field [0001] The invention relates to metal pipeline anti-corrosion protection technology, and in particular provides a construction and installation method of a pipeline outer wall anti-corrosion cathodic protection device and packing material thereof. Background technique [0002] Traditional corrosion control methods for large-diameter pipelines fall into the following two categories: isolation of metal pipelines from the corrosive environment, such as coating metal pipelines with anti-corrosion coatings; using electrochemical anti-corrosion methods for anti-corrosion treatment, such as installing sacrificial Anode device. [0003] The sacrificial anode placed in the pipeline is a special anode suitable for deep buried pipelines. Since its working location is deep underground, maintenance and replacement costs are high. In order to ensure the availability of this type of sacrificial anode, it is necessary to add sacrificial anode packing material. The packing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/02C23F13/08F16L1/036F16L58/00
Inventor 汪洪涛李京胡宏良魏英华陆卫中张立新卫珍陈林
Owner 上海青草沙投资建设发展有限公司
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