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Current detecting device for pipeline

A technology of a current detection device and a current detection module, applied in the field of pipeline current detection, can solve the problems of inability to detect pipe sections, difficult external detection, interference with the normal operation of cathodic protection system, etc. Effect

Active Publication Date: 2018-07-24
CHINA SPECIAL EQUIP INSPECTION & RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pipelines in mountainous areas, submarine pipelines, and sections with large buried depths or directional drilling cannot be reached by personnel or external inspection equipment cannot detect pipe sections, so it is difficult to implement external inspections.
[0004] In addition, in the vicinity of power lines, railways and other cathodic protection facilities, external detection cannot avoid external interference and judge stray currents, etc.
[0005] In addition, the external detection method needs to detect the resistance voltage drop of the soil, and the detection process will interfere with the normal operation of the cathodic protection system

Method used

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Embodiment Construction

[0051] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0052] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0053] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

[0054] In all examples shown and discussed herein, any specific values ​​should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have dif...

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Abstract

The invention discloses a current detecting device for a pipeline. The current detecting device is used for detecting the current in the pipeline and comprises a driving module and a current detectingmodule, wherein the driving module is set for driving the current detecting module to move in the pipeline so as to change the contact range between the current detecting module and the inner wall ofthe pipeline; the current detecting module is set for detecting the current of the pipeline in the contact range. The current detecting device is arranged in the pipeline and detects the current by movement in the pipeline, so that the detection for the cathodic protection current of the pipeline is not limited by external geographical conditions; in addition, the applicability of the current detecting device for the pipeline is good.

Description

technical field [0001] The invention relates to the technical field of pipeline current detection, and more specifically, the invention relates to a pipeline current detection device arranged inside a pipeline for detection. Background technique [0002] Cathodic protection technology is a kind of electrochemical protection technology. Its principle is to apply an external current to the surface of the corroded metal structure, and the protected structure becomes a cathode, so that the electron migration that occurs in metal corrosion is inhibited, and the corrosion is avoided or weakened. occur. In order to prevent electrochemical corrosion, storage and transportation pipelines are usually protected by cathodic protection methods such as sacrificial anodes or external currents. Such as figure 1 As shown, during the operation of the cathodic protection system, a cathodic protection current will be formed on the pipe wall. The cathodic protection current on the pipeline 2 ...

Claims

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Application Information

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IPC IPC(8): C23F13/22
CPCC23F13/22C23F2213/32
Inventor 陈金忠马义来何仁洋李春雨王俊杰
Owner CHINA SPECIAL EQUIP INSPECTION & RES INST
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