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Formula and process of high-performance high-gradient arrester valve piece

A lightning arrester, high gradient technology, applied in the direction of overvoltage protection resistors, varistors, etc., can solve the problems of poor comprehensive performance, lower firing temperature, difficult actual production, etc., to achieve high 2ms square wave current capacity, The effect of power consumption at low Kct and low temperature

Inactive Publication Date: 2018-07-03
XIAN TIANGONG ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These patents achieve high-gradient technical routes, some are adding rare earth metal oxides, some are lowering the firing temperature, some are using high-energy ball milling or nano-materials, and some are using chemical co-precipitation to prepare composite additives. Due to difficult control of the process, high cost and comprehensive performance It is difficult to apply to actual production due to different reasons such as poor performance; in addition, there is no data on power consumption at high temperature in these patents

Method used

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  • Formula and process of high-performance high-gradient arrester valve piece

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preparation example Construction

[0030] A preparation process of a high gradient arrester valve disc, the specific steps are as follows:

[0031] Calcined material preparation-slurry preparation-spray granulation-press molding-debinding, pre-firing-firing-spray glass glue-glaze firing, heat treatment-grinding, cleaning, drying-spray Aluminum electrode.

Embodiment 1

[0034] In the high-performance high-gradient arrester valve plate of this embodiment, the weight percentages of the zinc oxide varistor ceramic components are as follows: 90.52% ZnO, 1.8% Bi 2 O 3 ,4.2% Sb 2 O 3 , 1.0% NiO, 1.0% Co 3 O 4 ,1.0% MnCO 3 ,0.1% Cr 2 O 3 ,0.2% SiO 2 , 0.15% of silver glass powder, 0.03% of Al(NO 3 ) 3 *9H 2 O. The production process is carried out in accordance with the following steps.

[0035] 1) Preparation of calcined material

[0036] Weigh Bi with an electronic balance according to the formula 2 O 3 ,Sb 2 O 3 ,NiO,Co 3 O 4 ,MnCO 3 ,Cr 2 O 3 ,SiO 2 , Silver glass powder and Al(NO 3 ) 3 *9H 2 O. First use a stirring ball mill to mix Bi 2 O 3 ,Sb 2 O 3 ,NiO,Co 3 O 4 ,MnCO 3 ,Cr 2 O 3 ,SiO 2 The silver glass powder is ground to 1.5 microns, and then the ball-milled slurry is dried and mixed evenly, then put into the corundum sagger and calcined in a pusher kiln at 800℃, and finally the calcined material is ground with a stirring ball mill To about 0.5...

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Abstract

The invention discloses a formula and process of a high-performance high-gradient arrester valve piece. The valve piece is prepared by virtue of a conventional bismuth zinc oxide component system andconventional raw material and clinker process, the weight proportions of Bi2O3 to Sb2O3 and Cr2O3 to SiO2 are optimized, a sintered thermal treatment process and a low-temperature glass glaze sintering process are introduced, and the size of a leaved edge of an aluminum electrode is controlled, so that a series of high performance such as low leakage current and pressure ratio, high 2ms square wave discharge current capacity, high-temperature low power consumption and aging-accelerated low Kct are achieved. By utilizing the conventional raw material and clinker process, the pressure ratio, leakage current, high-temperature low power consumption and aging-accelerated low Kct of the high-gradient valve piece are reduced, the 2ms square wave discharge current capacity is improved, the high-performance valve piece is provided for a miniaturized GIS arrester, and various properties of the GIS arrester are substantially improved, so that the operational reliability and protection level of the GIS arrester are improved.

Description

Technical field [0001] The invention belongs to the technical field of lightning arresters for electric power systems, and is a formula and process for high-performance and high-gradient arrester valves. Background technique [0002] In order to realize the miniaturization of the arrester, Imataki and others of Mitsubishi Corporation proposed the idea of ​​a high-gradient zinc oxide arrester valve in 1984. Japan's Mitsubishi, Hitachi and Toshiba companies developed high-gradient zinc oxide arresters with a gradient of 400V / mm in 1997 and successfully applied them to GIS arresters, greatly reducing the volume of GIS arresters and making the design and installation of GIS arresters easier And the cost is lower. After continuous improvement, Toshiba and other companies have greatly improved the performance of the high-gradient arrester valve. The current energy density of the 2ms square wave flow can reach 300J / cm3, and the 10kA pressure ratio of the 100mm diameter valve is about 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/453C04B41/90H01C7/12
CPCC04B35/453C04B41/009C04B41/52C04B41/90C04B2235/3241C04B2235/3277C04B2235/3279C04B2235/3294C04B2235/3298C04B2235/3418C04B2235/36C04B2235/442C04B2235/443C04B2235/96H01C7/12C04B41/5022C04B41/4543C04B41/5155
Inventor 葛平安伍建新
Owner XIAN TIANGONG ELECTRIC