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Decoupling device used for steel pipe protection project

A pipeline and engineering technology, applied in the field of decouplers, can solve problems such as electrochemical corrosion of pipelines, damage to pipeline insulation, endangering personal safety, etc., and achieve the effects of good thermal conductivity, improved service life, and high protection level.

Active Publication Date: 2009-10-21
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

The induced electromotive force and overvoltage will cause electrochemical corrosion to the pipeline, accelerate the corrosion of the pipeline, damage the equipment connected to the pipeline, especially the cathodic protection device, cause the insulation layer of the pipeline to be damaged, and endanger personal safety
[0003] At present, there are some devices, such as drainers, which can limit the magnitude of induced electromotive force and the magnitude of electrostatic voltage generated by capacitive coupling on the pipeline due to the mutual inductance coupling of the transmission line pair, but it has little effect on the overvoltage generated by the current through resistive coupling. There is no protective function, and it may even damage itself
With the continuous increase of the length of oil and gas transmission pipelines in the petroleum and petrochemical industry, its status in the construction of the national economy continues to increase, and the existing protective devices cannot meet the needs of the petroleum and petrochemical industry.

Method used

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  • Decoupling device used for steel pipe protection project
  • Decoupling device used for steel pipe protection project
  • Decoupling device used for steel pipe protection project

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: as figure 2 with image 3 As shown, the present invention includes a thyristor 1 (triac is selected), a metal support 2 , a coupling trigger device 3 , a surge protection device 4 , a corrosion-resistant shell 5 , a sealing packing 6 , ports and leads 7 . The control electrode of the thyristor 1 is connected to the reactance element of the coupling trigger device 3 , the thyristor 1 and the coupling trigger device 3 are connected in parallel with the surge protection device 4 , and both ends of the surge protection device 4 lead out to ports. The surge protection device includes a gas discharge tube and a varistor with a flow capacity of 100kA and a starting voltage of 60V. The thyristor is fixed on the metal support 2, the thyristor 1, the metal support 2, the coupling trigger device 3 and the surge protection device 4 are all put into the corrosion-resistant casing 5, and the corrosion-resistant casing 5 and other components The gap is filled with the...

Embodiment 2

[0016] Embodiment 2: Except that the start-up voltage of the surge protection device is 75V, the rest is the same as that of Embodiment 1. Its protective performance: it can limit the overvoltage on the pipeline within the safe voltage of the human body, limit the peak value of the induced voltage within ten volts, and can discharge 100kA lightning current and 5kA short-term (0.6s) power frequency current; the enclosure protection level— —IP68.

Embodiment 3

[0017] Embodiment 3: Except that the start-up voltage of the surge protection device is 90V, the rest is the same as that of Embodiment 1. Its protective performance: it can limit the overvoltage on the pipeline within the safe voltage of the human body, limit the peak value of the induced voltage within ten volts, and can discharge 100kA lightning current and 5kA short-term (0.6s) power frequency current; the enclosure protection level— —IP68.

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PUM

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Abstract

The invention provides an isolator used for steel pipeline protection works. the isolator comprises controlled silicon (1), a coupling trigger (3), a surge protector (4) and a port; a control electrode of the controlled silicon (1) is connected to a reactance element of the coupling trigger (3); the controlled silicon (1) is in parallel connection with the surge protector (4) through the coupling trigger (3); ports are led out form two ends of the surge protector (4). The invention can prevent adverse impact caused by overvoltage and induced electromotive force which are generated on the pipelines by various sorts of coupling, improves the service life of a pipework and protects devices which are connected with the pipelines; meanwhile, the invention can exclude adverse impact caused by grounding stray power current, and reduces interference of the power current on communication lines.

Description

technical field [0001] The invention belongs to the field of decouplers, in particular to a decoupler for pipeline protection. Background technique [0002] In the oil and gas pipeline system of the petroleum and petrochemical industry, due to the induction of current through space (mutual inductance coupling), the electrostatic induction of voltage through space (capacitive coupling), and the coupling of current into the ground (resistance coupling), induction will occur on pipelines and storage tanks. EMF and overvoltage. The induced electromotive force and overvoltage will cause electrochemical corrosion to the pipeline, accelerate the corrosion of the pipeline, damage the equipment connected to the pipeline, especially the cathodic protection device, cause the insulation layer of the pipeline to be damaged, and endanger personal safety. [0003] At present, there are some devices, such as drainers, which can limit the magnitude of induced electromotive force and the mag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/00H02H9/04H02H9/06C23F13/02
Inventor 刘旭解子燕王富元张祥贵
Owner 武汉爱劳高科技有限责任公司