A pipeline cathodic protection potential inspection sheet test device and preparation method thereof

Abstract

The invention discloses a testing device for a pipeline cathodic protection potential test piece and a preparation method of the testing device and belongs to the field of pipeline protection. The testing device comprises a metal test piece, test lead wires, a universal meter, a protective shell, an insulator and a switch, wherein the test lead wires comprise a first test lead wire, a second testlead wire and a third test lead wire; the insulator is arranged inside the protective shell; the metal test piece is externally coated with the insulator; the lower surface of the metal test piece isflush with the lower end face of the protective shell and is exposed; the first test lead wire, the switch, the second test lead wire, the metal test piece, the third test lead wire and the universalmeter are sequentially and electrically connected; besides, the connecting end part of the second test lead wire and the metal test piece and the connecting end part between the third test lead wire and the metal test piece are respectively and externally coated with the insulator. According to the testing device, the morphology of leakage points of a pipeline surface coating can be accurately simulated, the influence of shielding effect and edge effect of the metal test piece on testing is avoided, and a cathodic protection potential of a to-be-tested pipeline can be obtained by accurate testing; in addition, the testing device has the advantages of simplicity and easiness in operation and long service life.

Description

technical field

[0001] The invention relates to the field of pipeline protection, in particular to a pipeline cathodic protection potential inspection sheet testing device and a preparation method thereof. Background technique

[0002] At present, the cathodic protection potential of buried pipelines is usually tested to monitor and control the cathodic protection effect of buried pipelines. The testing methods of cathodic protection potential of pipeline mainly include instantaneous power failure method, polarization probe method and inspection sheet method. Among them, the inspection sheet method is widely used due to the advantages of less external interference factors and simple operation.

[0003] GB / T 21448 "Technical Specifications for Cathodic Protection of Buried Steel Pipelines", GB / T 21246 "Measurement Method of Cathodic Protection Parameters for Buried Steel Pipelines", and SY / T 0029 "Technical Specifications for Application of Buried Steel Inspection Plates", et...

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