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Inorganic nano compound and preparation method and application thereof

An inorganic nano-composite technology, applied in the installation of electrical components, cable accessories, cables, etc., can solve the problems of poor operating conditions of cable accessories, high cable co-channel ratio, partial discharge, etc., to reduce the intensity of partial discharge, The effect of high conductivity and uniform electric field

Active Publication Date: 2012-07-25
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All of these may lead to the formation of local high electric field points at the interface between the XLPE (cross-linked polyethylene) insulation layer and the cable accessories, thereby generating partial discharges and further leading to insulation accidents
(2) The operating conditions are poor. At present, the common trench rate of the entire urban power grid cable is high. A large number of cables share a cable trench, which causes serious heat generation, and most cables are in overload operation for a long time. The problem of water accumulation in cable trenches in summer is also very serious, resulting in Cable accessories are in very bad condition
(3) Under the action of long-term cold and heat cycle, the cable accessories will form a small air gap between the main insulation layer and the sheath, which will also easily lead to partial discharge
Searching domestic and foreign literature databases, there is no report on the use of inorganic nano-coatings to improve the partial discharge resistance of cable accessories. For the application of nano-coatings on the XLPE main insulation surface of cable terminals to improve the service life of cable terminals, domestic and foreign Neither patent literature nor non-patent literature has reported

Method used

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  • Inorganic nano compound and preparation method and application thereof
  • Inorganic nano compound and preparation method and application thereof
  • Inorganic nano compound and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Add 10 parts of nano-silica-coated nano-titanium dioxide, 0.5 part of nano-alumina, 0.5 part of nano-silicon dioxide, and 0.5 part of nano-zinc oxide into the mixing container, and disperse and mix evenly by grinding and ultrasonic dispersing machine , the ultrasonic power is 200W, and the frequency is 20kHz.

[0045] (2) Add the mixture prepared above with 20 parts of acetone, 20 parts of diethylene glycol and 1 part of polyethylene glycol into a container with a stirrer, a thermometer and a reflux condenser, and further disperse and mix evenly by grinding and ultrasonic dispersing machine , to obtain a nanoparticle dispersion, wherein the stirring speed is 1500 rpm, the ultrasonic power is 200W, the frequency is 20kHz, and the time is 30min.

[0046] (3) Filter the above-mentioned nanoparticle dispersion with a 800-mesh filter, then add 0.5 parts of ethylene glycol monobutyl ether and 0.5 part of ethanolamine to the above-mentioned filtrate and stir evenly, with a...

Embodiment 2

[0054] (1) Add 15 parts of nano-titanium dioxide coated with nano-silica, 2 parts of nano-alumina, 2 parts of nano-silicon dioxide, and 2 parts of nano-zinc oxide into the mixing container, and disperse and mix evenly by grinding and ultrasonic dispersing machine , the ultrasonic power is 500W, and the frequency is 24kHz.

[0055] (2) Add the mixture prepared above with 80 parts of carbon tetrachloride and 2 parts of oxidized polyethylene glycol into a container with a stirrer, a thermometer and a reflux condenser, and further disperse and mix evenly by grinding and ultrasonic dispersing machine, A nanoparticle dispersion was obtained, wherein the stirring speed was 2000 rpm, the ultrasonic power was 500 W, the frequency was 24 kHz, and the time was 60 min.

[0056] (3) The above-mentioned nanoparticle dispersion is filtered with a 1000-mesh filter screen, then 1 part of propylene glycol ether and 1 part of ammonia are added to the above-mentioned filtrate and stirred evenly, ...

Embodiment 3

[0064] (1) Add 12 parts of nano-titanium dioxide coated with nano-silica, 1 part of nano-alumina, 1 part of nano-silicon dioxide, and 1 part of nano-zinc oxide into the mixing container, and disperse and mix evenly by grinding and ultrasonic dispersing machine , the ultrasonic power is 300W, and the frequency is 22kHz.

[0065] (2) Add the mixture prepared above with 40 parts of salicyl alcohol, 20 parts of xylitol and 1 part of polyacrylamide into a container with a stirrer, thermometer and reflux condenser, and further disperse and mix by grinding and ultrasonic dispersing machine Uniformly, to obtain a nanoparticle dispersion, wherein the stirring speed is 1500 rpm, the ultrasonic power is 300W, the frequency is 22kHz, and the time is 50min.

[0066] (3) The above-mentioned nanoparticle dispersion is filtered with a 900-mesh filter screen, then 1 part of ethylene glycol and 1 part of potassium hydroxide are added to the above-mentioned filtrate and stirred evenly, the stirr...

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Abstract

The invention discloses an inorganic nano compound and a preparation method and application thereof. The inorganic nano compound is characterized in that the preparation method of the inorganic nano compound comprises the steps of adding 10-15 weight parts of nano silica coated nano titanium oxide, 0.5-2 weight parts of nano alumina, 0.5-2 weight parts of nano silica and 0.5-2 weight parts of nano zinc oxide into a mixing container, grinding and carrying out ultrasonic dispersion to be uniform; adding the above mixture and 40-80 weight parts of a solvent and 1-2 weight parts of a dispersant into a container, further dispersing to be uniform to obtain nano particle dispersion, filtering the nano particle dispersion with a filter screen of 800-1,000 meshes, adding 0.5-1 weight parts of a film-forming agent and 0.5-1 weight parts of a neutralizer into the above filtrate, stirring uniformly at a stirring speed of 500-600rpm to obtain the inorganic nano compound with a solid content of 2-7% and a pH value of 6-7.

Description

technical field [0001] The invention relates to an inorganic nano-composite agent and its preparation method and application, belonging to the field of cable accessory installation technology. It is used in the installation project of cross-linked polyethylene power cable terminals. Background technique [0002] Cable accessories are widely used in 6-35kV urban power grids, and the accident rate of cable accessories accounts for 39% of the total cable faults, seriously affecting the reliability of power supply. The accidents of the cable accessories have been investigated on site, and the main reasons are as follows: (1) On-site construction quality problems, such as: the installation of the stress cone is not in place, the tool accidentally leaves defects on the insulating layer when stripping the semi-conductive layer, and impurities are mixed in. All of these may lead to the formation of local high electric field points at the interface between the XLPE (cross-linked pol...

Claims

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Application Information

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IPC IPC(8): C08K9/10C08K3/22C08K3/36C08L23/06H02G15/00
Inventor 周凯赵威陶文彪李旭涛陶霰韬万利熊庆牟秋谷黄友聪潘荣超李顺
Owner SICHUAN UNIV
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