Stray current protection method based on multi-point synchronous monitoring and field drainage test
A stray current, on-site technology, used in measuring devices, material analysis by electromagnetic means, instruments, etc., can solve the problem of inability to solve the problem of synchronous monitoring of dynamic DC stray currents of buried pipelines, deviation of stray current inflow and outflow rules, and inability to solve problems. Reflect the inflow and outflow laws and other issues, and achieve the effect of ensuring a wide range and high efficiency, improving effectiveness and accuracy, and high-quality drainage design.
Inactive Publication Date: 2021-02-09
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
At present, there are certain problems in the well-known various on-site stray current monitoring technologies, which cannot solve the problem of synchronous monitoring of dynamic DC stray currents in buried pipelines, resulting in certain problems in the analysis of the inflow and outflow of stray currents. The deviation does not reflect the law of inflow and outflow at the same time
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Embodiment 1
[0047] This embodiment provides a dynamic DC stray current protection design method for buried pipelines based on multi-point synchronous monitoring and on-site drainage tests, including the following steps:
[0048] (1) Install stray current test pieces and reference electrodes at selected monitoring points in the dynamic stray current interference pipe section;
[0049] (2) Connect the test piece line, reference electrode line and pipeline line to the UDL-2 data logger; among them, the UDL-2 data logger sets the parameter as 1s to record a value, the cycle period is 20s, power off The time is 3s; adopt the test piece power-off method, and use the UDL-2 data recorder to conduct 24-hour synchronous and continuous monitoring of the energization potential of the buried pipeline along each test point, the test piece power-off potential and the test piece DC current density;
[0050] (3) After obtaining the stray current interference parameters of the subway at different positions...
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The invention provides a stray current protection method based on multi-point synchronous monitoring and a field drainage test, and relates to the technical field of buried pipeline monitoring. The method can improve the effectiveness and accuracy of dynamic direct current stray current monitoring of a buried pipeline, and has the advantages of wide coverage, high efficiency, high accuracy and good effect. The method comprises the following steps of: S1, selecting a plurality of monitoring points at a current interference pipe section for monitoring and analyzing to obtain distribution data ofa main inflow point and a main outflow point of the current interference pipe section; S2, according to the distribution data of the main inflow point and the main outflow point, selecting the installation position of a temporary drainage ground bed to carry out an on-site feed drainage test; and S3, formulating a drainage scheme of the stray current according to a test result and carrying out drainage. The technical scheme provided by the invention is suitable for the drainage process of the buried pipeline.
Description
【Technical field】 [0001] The invention relates to the technical field of buried pipeline monitoring, in particular to a stray current protection method based on multi-point synchronous monitoring and field drainage test. 【Background technique】 [0002] In recent years, with the continuous development of traffic and transportation industry, the interference of subway dynamic DC stray currents on buried pipe sections has become increasingly prominent. Drainage, as an effective measure to alleviate dynamic DC stray current interference, has been widely used in buried pipelines such as water, oil and gas transmission. However, to determine and study the inflow and outflow laws of dynamic DC stray currents, as well as the drainage measures for the inflow and outflow laws, it is necessary to carry out monitoring of dynamic DC stray currents in buried pipelines. The monitoring time of this kind of dynamic stray current generally takes more than 24 hours, not only the current inten...
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IPC IPC(8): G01N27/00
CPCG01N27/00
Inventor 杜艳霞张雷车昆梁毅王竹
Owner UNIV OF SCI & TECH BEIJING