Test stubs and how they work

Abstract

A test pile comprises a hollow pile body. The lower portion of the pile body is located underground, and the pile body is located above or beside an underground pipeline. A test block pipe is installed in the pile body. A cabin door is arranged on the pile body. A wiring board is installed in the pile body. A test block is installed in the test block pipe. A reference electrode is installed in the pile body. The test block, the reference electrode and the pipeline are connected with the wiring board. The lower portion of the test pile is inserted underground, the test block is installed in the test block pipe, the reference electrode is installed in the lower end of the test pile, and therefore the lower portion of the test pile can be used as a reference pipe, and it is unnecessary to additionally install a reference pipe; installation and layout are simple, and the cost of whole pipeline cathode protection engineering is also reduced. When the reference electrode is calibrated, a working electrode for calibration can be conveyed to an underground position through the test pile, the working electrode is made to be close to the reference electrode to be calibrated as much as possible, and calibration is more accurate; the reference electrode to be calibrated can also be taken out to an overground position from the underground position along an inner cavity of the test pile, the reference electrode directly gets close to the working electrode on the ground, calibration is conducted, and therefore calibration accuracy is improved; moreover, the reference electrode and the test block can be taken out from the underground position and are convenient to replace and maintain.

Description

technical field [0001] The invention relates to the technical field of cathodic protection, in particular to a test pile for detecting the cathodic protection state of pipelines and a working method thereof. Background technique [0002] The test pile is mainly used for pipeline potential detection and detection of cathodic protection system protection effect of metal structures such as large steel structure storage tanks and pipelines. In order to improve the detection accuracy and eliminate the IR drop, the test pile passes through the switch and the set test piece and reference electrode to detect the polarization potential of the pipeline. In order to ensure the accuracy of polarization potential detection, it is necessary to calibrate the reference electrode regularly. There are two main ways to calibrate the reference electrode: one is to directly use the portable reference electrode as the reference electrode and place it on the ground. Calibrate the reference electr...

AI Technical Summary

Problems solved by technology

However, the test pile is generally set in a remote location along with the pipeline, and it is very difficult for the operator to reach the site. After the last test is completed, the operator tends to forget to close the switch, so that the test piece will not be polarized when it arrives at the site next time. , and cannot be detected, even if the switch is closed immediately after arriving at the site, it will take several hours for the test piece to be fully polarized. The operation error of forgetting to close the switch in the last detection will seriously affect the cathodic protection potential detection of the entire pipeline If the polarization is not sufficient, it will also affect the measurement accuracy of the polarization potential

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