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Pipeline grounding device isolator with anti-corrosion capability

A grounding device and isolator technology, applied in the field of isolators, can solve the problems of increasing the burden of forced current cathodic protection devices, limited insulation layer thickness, unfavorable safe operation, etc., and achieves excellent acid, alkali and salt corrosion resistance, convenient construction, and good The effect of hydrophobicity and self-cleaning ability

Inactive Publication Date: 2008-07-09
武汉爱劳高科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limited thickness of the insulating layer covered on the buried steel pipeline, the voltage that the insulating layer can withstand is only tens of kilovolts. Overvoltage to thousands of kilovolts, the insulation layer will be destroyed by the overvoltage, and the corrosion of buried steel pipelines at the location where the insulation layer is damaged is accelerated, which is not conducive to safe operation
If the grounding device is added every certain distance on the buried steel pipeline, it can effectively protect the insulating layer on it, but because the grounding device will discharge the current of the forced current cathodic protection device to the ground, it will aggravate the forced current cathodic protection device. burden

Method used

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  • Pipeline grounding device isolator with anti-corrosion capability

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Effect test

Embodiment 1

[0015] The structure of the pipeline grounding device isolator with anti-corrosion performance is shown in Figure 1 and Figure 2: it includes a large-flow gas discharge tube 1, which is covered with a polymer silicone rubber layer 2, and the two are cylindrical as a whole. Electrodes 3 are led out from both sides of the large through-flow gas discharge tube 1, forming the main part of the isolator. Electrode 3 uses corrosion-resistant material and is a rigid electrode. One side of the electrode 3 is placed with 2 stainless steel hexagonal nuts used for wiring by the user.

Embodiment 2

[0017] The pipeline grounding device isolator with anti-corrosion performance, its structure is shown in Figure 3 and Figure 4: the overall volume and large flow gas discharge tube 1 of embodiment 2 are larger than that of embodiment 1, and the large flow gas discharge tube 1 and its covering The polymer silicone rubber layer 2 is in the shape of a spindle as a whole. Others are the same as in Example 1.

Embodiment 3

[0019] The structure of the isolator for pipeline grounding device with anti-corrosion performance is shown in Figure 5 and Figure 6: it includes a large-flow gas discharge tube 1, and electrodes 3 are drawn from both sides of the large-flow gas discharge tube 1, and the electrodes 3 are made of corrosion-resistant materials , and is a flexible electrode. The large through-flow gas discharge tube 1 and the electrode 3 are covered with a polymer silicone rubber layer 2 to form the main part of the isolator.

[0020] The isolator can be connected to the ground electrode of the buried steel pipeline, and has excellent performance.

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Abstract

The invention provides an isolator of a pipeline grounding device, which has antiseptic property. The isolator comprises a large throughflow gas-discharge tube (1), wherein an electric pole (3) is extended from the large throughflow gas-discharge tube (1), and the large throughflow gas-discharge tube (1) is covered with a macromolecule silicon rubber layer (2). The invention can isolate earth current in an impressed current cathodic protecting device through the grounding device, control excess voltage which is generated on the steel pipe insulating layer when thunder flows to the ground or failure happens that high voltage power transmission route connects ground, and the invention has corrosion resistance and convenient construction.

Description

technical field [0001] The invention belongs to the field of isolators, in particular to a pipeline grounding device isolator installed with a forced current cathodic protection device. Background technique [0002] In the petroleum and petrochemical industry, long-distance pipeline systems for oil and gas transportation mostly use buried steel pipelines. Due to the existence of electrochemical corrosion, the life of buried steel pipelines is shortened, which cannot meet the requirements of use. In order to increase the service life of the buried steel pipeline, it is usually covered with a certain thickness of insulating layer, and then a forced current cathodic protection device is installed on the pipeline to apply a forced negative potential. Through these two measures, it is possible to limit the electrochemical corrosion on the buried steel pipeline and prolong its service life. Due to the limited thickness of the insulating layer covered on the buried steel pipeline...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/06C23F13/12
Inventor 刘旭解子燕王富元张智
Owner 武汉爱劳高科技有限责任公司