Silicon oil detector, electric terminal assembly and silicon oil detector use method

A power terminal and detector technology, which is applied in the field of silicone oil detectors, can solve the problems that it is difficult to detect oil leakage of high-voltage cable accessories in time, the resistance change of the conductive layer is not very fast and significant, and the oil leakage alarm is not timely, etc., so as to achieve convenient observation and treatment, convenient oil leakage, and convenient use

Active Publication Date: 2014-08-06
TYCO ELECTRONICS (SHANGHAI) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) When the oil leakage wraps the conductive particles, the resistance change of the conductive layer is not very fast and significant. Therefore, the detection sensitivity is not enough, and it is easy to cause the oil leakage alarm to be untimely, and it is difficult to detect the oil leakage in the high-voltage cable fittings in time. Thus there is a hidden danger of serious power failure caused by oil leakage;
[0005] 2) When rainwater or other liquids drip onto the conductive layer, it will also change the resistance of the conductive layer. Therefore, when used outdoors, a special protective film that is waterproof but oil-permeable must be provided on the conductive layer , therefore, the structure is complex and the cost is high

Method used

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  • Silicon oil detector, electric terminal assembly and silicon oil detector use method
  • Silicon oil detector, electric terminal assembly and silicon oil detector use method
  • Silicon oil detector, electric terminal assembly and silicon oil detector use method

Examples

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Effect test

example 1

[0043] A layer of film was coated on and between the two electrodes with liquid silicone rubber containing conductive carbon black, placed in an oven to heat up to 160°C for 2 hours, and then cooled to room temperature. A silicone rubber coating containing 11.9 wt% conductive carbon black was obtained.

[0044] The resistance between the measurement electrodes was stable at 7.98kΩ at room temperature. Add a drop of silicone oil to the silicone rubber on the electrode, and within half an hour, the resistance increased from 7.98kΩ to 12.45kΩ and remained stable. The resistance value increased by 56.0%.

example 2

[0046] A layer of film was coated on and between the two electrodes with liquid silicone rubber containing conductive carbon black, placed in an oven to heat up to 160°C for 2 hours, and then cooled to room temperature. A silicone rubber coating containing 20.6 wt% conductive carbon black was obtained.

[0047] The resistance between the measurement electrodes was stable at 1.75kΩ at room temperature. Add a drop of silicone oil to the silicone rubber on the electrode, and within half an hour, the resistance increased from 1.75kΩ to 2.86kΩ and remained stable. The resistance value increased by 63.4%.

example 3

[0049] Coat a layer of thin film on and between the two electrodes with liquid silicone rubber containing silver powder, place it in an oven to heat up to 160°C, hold for 2 hours to solidify, and then cool to room temperature. A conductive silicone rubber coating containing 80.2 wt% silver powder was obtained.

[0050] The resistance between the electrodes was measured to be 0.21 kΩ at room temperature. When a drop of silicone oil was dropped on the silicone rubber, the resistance increased from 0.21kΩ to 0.41kΩ within half an hour and remained stable. The resistance value increased by 95.2%.

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Abstract

The present invention relates to a silicon oil detector, an electric terminal assembly and a silicon oil detector use method. The invention discloses the silicon oil detector, which comprises an electric conduction layer, wherein the electric conduction layer adopts an organosilicon polymer material as a matrix material, the organosilicon polymer material is added with electric conduction particles, and the organosilicon polymer material swells when the electric conduction layer contacts silicon oil so as to increase electric resistance of the electric conduction layer. According to the present invention, when the organosilicon polymer base electric conduction layer contacts the silicon oil, the organosilicon polymer material rapidly swells, such that the electric resistance of the organosilicon polymer base electric conduction layer is significantly changed, and the alarm signal is sent according to the change of the electric resistance; the silicon oil detector has characteristics of strong response signal, rapid response and lasting response so as to conveniently and timely find the oil leakage phenomenon; and the organosilicon polymer base silicon oil detector is not affected by water, such that the organosilicon polymer base silicon oil detector is suitable for outdoor.

Description

technical field [0001] The invention relates to a silicone oil detector, in particular to a silicone oil detector for detecting silicone oil leaked from an outdoor power terminal filled with silicone oil. Background technique [0002] High-voltage outdoor power terminals filled with silicone oil can be used in 170kV high-voltage engineering fields, such as oil-filled high-voltage cable accessories. However, sometimes these outdoor power terminals are at risk of oil leakage, which can lead to serious power failures. At the same time, because these outdoor power terminals are often installed at a high position from the ground, it is difficult to detect these oil leaks in time. [0003] In the existing detectors for detecting oil leakage, whether there is oil leakage is generally detected according to the characteristic that the oil leakage wraps the surface of the conductive particles, so that the resistance of the conductive layer changes. Therefore, the existing oil detect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/04
CPCG01N27/12G01M3/045G01N27/20G01N27/126
Inventor 高婷黄忠喜杨立章伍静
Owner TYCO ELECTRONICS (SHANGHAI) CO LTD
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