Polarization testing probe and testing method for cathodic protection of underground steel pipelines
A cathodic protection and pipeline technology, applied in measuring devices, instruments, scientific instruments, etc., can solve the problem of limited service life of test probes, and achieve the effect of feasible processing and manufacturing process plan, easy mass production, and easy quality control.
Inactive Publication Date: 2012-02-15
UNIV OF SCI & TECH BEIJING +1
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Problems solved by technology
Due to the late start of research and development on cathodic protection polarization probes at home and abroad, there are few related reports, and there are few products available on the market at present. There are many deficiencies in life and function. The main problem is that the service life of the test probe is limited. Since the test probe needs to be buried and used, it needs a long service life. Around the problems existing in the current buried pipeline cathodic protection polarization potential test, a research has been carried out. Related research, on the basis of the research results, a buried pipeline cathodic protection polarization potential test probe was developed
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[0031] (1) A cylindrical insulating shell is made by processing UPVC pipes and plates. The total size of the shell is Ф120×240mm. The shell contains two isolated cavities, the lower cavity has a size of Ф120×210mm, and the upper cavity has a size of Ф120×210mm. The size is Ф120×30mm;
[0032] (2) A cylindrical sample of Ф11.3×5 mm is processed by wire cutting, and the material is the same as or similar to the base material of the pipeline to which the probe is applied; one 4 cm of the cylindrical sample 2 The bottom surface acts as a working surface, and the cables are welded on the other bottom surface, and the connection points are insulated and anti-corrosion treated; a cylindrical sample is installed on the bottom of the insulating shell by means of interference sealing, and only one 4cm sample is left. 2 The other surfaces are sealed; the two bundles of cables connected to the two samples pass through the lower cavity, and are mechanically connected to the two cores of th...
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The invention relates to a polarization testing probe and a testing method for cathodic protection of underground steel pipelines, and the invention is mainly used for measurement of polarization potentials of cathodic protection of underground steel pipelines. The probe provided in the invention is used for simulating a leakage point on a coating of an underground steel pipeline, and comprises an insulation shell, a testing sample, a reference electrode and cables, wherein, the insulation shell comprises an upper cavity and a lower cavity, the upper cavity is filled with an insulation sealing material, the lower cavity is further divided into an inner hollow cavity and an outer hollow cavity, the reference electrode is arranged in the inner hollow cavity, the outer hollow cavity is filled with the insulation sealing material, the testing sample is installed at the bottom of the insulation shell at the outer hollow cavity, the testing sample and a simulated steel pipeline are made of a same material, the testing sample is electrically connected with a cable, the interconnecting part of the testing sample and the cable is subjected to insulation and anti-corrosion treatment, one end of the reference electrode extends into the upper cavity and is electrically connected with a cable, the interconnecting part of the end of the reference electrode and the cable is subjected to insulation and anti-corrosion treatment, the other end of the reference electrode contacts with soil, and the cables both extend out from the top of the insulation shell.
Description
[0001] Field of Invention [0002] The invention relates to the technical field of cathodic protection detection, in particular to a cathodic protection polarization test probe and a test method for buried pipelines, which are mainly used for measuring the cathodic protection polarization potential of buried steel pipelines. [0003] Background technique [0004] Cathodic protection has been widely used as a cost-effective method to prevent corrosion of buried steel pipelines. Polarization potential is a key parameter of cathodic protection, which marks the degree of cathodic polarization and is an important tool to monitor and control the effect of cathodic protection. important indicators. Therefore, accurate measurement of polarization potential is of great significance to ensure the effective implementation of cathodic protection technology. [0005] After the buried steel pipeline adopts cathodic protection, the IR drop caused by the current flowing in the soil will b...
Claims
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IPC IPC(8): G01N17/04
Inventor 杜艳霞张雷路民旭
Owner UNIV OF SCI & TECH BEIJING