Debubbling and drying apparatus for dipping insulative media of power capacitors

A technology of power capacitors and insulating mediums, applied in the direction of fixed capacitor dielectrics, capacitors, capacitor manufacturing, etc., can solve problems such as unsatisfactory heat dissipation effect and affect the stability of power capacitors, avoid internal corrosion and expansion, and improve thermal stability. and service life, high temperature and low temperature performance

Inactive Publication Date: 2008-09-03
上海贵宝机电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The insulating media used for impregnation include paraffin, mineral oil, silicone oil, vegetable oil, resin, sulfur hexafluoride gas, etc. The most prominent disadvantage of these insulating media is that the heat dissipation effect is not ideal, and the stability of the power capacitor is affected when working in a high temperature environment. sex

Method used

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  • Debubbling and drying apparatus for dipping insulative media of power capacitors
  • Debubbling and drying apparatus for dipping insulative media of power capacitors

Examples

Experimental program
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Embodiment 1

[0015] The electrical grade polypropylene film coated with a layer of aluminum film on one side is used as the electrode material, and the polybutene emulsion with an average molecular weight ≈ 1000 is used as the impregnated insulating medium to make a power capacitor. Electrode rolling, insulating medium filling, sealing, vacuuming and other processes in the power capacitor shell are as usual; it is only because of the trace moisture and air bubbles contained in the polybutene emulsion that it is difficult to use a vacuum pump after sealing. Therefore, before the polybutene emulsion is filled and filled, it is processed on the negative pressure defoaming and drying device provided by the present invention, and the temperature of the hot water used for defoaming and drying is controlled at 85°C.

Embodiment 2

[0017] As shown in the accompanying drawings, the casing 11 and the umbrella-shaped defoaming mechanism 5 of the defoaming drying device provided by the present invention are made of stainless steel, and the casing 11 is provided with a spacer 7, which can pass hot water or steam, and can also use electric heating. The umbrella-shaped defoaming mechanism is welded and fixed with four supporting frames 6 and the inner wall of the casing 11. The outer side of the box body 11 can be covered with heat insulating material.

[0018] The properties of polyisobutylene emulsion are similar to those of polybutene emulsion, and the examples are omitted.

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Abstract

Emulsion of polybutene or polyisobutylene with average molecular weight 600-2400 is adopted as insulating medium. Debubbling and drying equipment preprocesses the said emulsion before it is filled and dipped. The debubbling and drying equipment includes cabinet, feed pipe, extraction pipe, umbrella type debubbling mechanism faced to feed pipe, evacuation tube and heat source inside spacer of cabinet. Hot water, steam or electrical heater can be as heat source, and temperature of heat source is 55 deg.C-85deg.C. Advantages of polybutene or polyisobutylene are: high chemical stability, high and low temperature resistant, temperature of operating environment-50 deg.C-85deg.C, and good performances of electrical property, insulation property, water resistance etc. as well as innocuous, flavorless and fast heat dispersion. The debubbling and drying equipment raises purity of emulsion, prevents corrosion and expansion so as to increase thermal stability and service life.

Description

technical field [0001] The invention relates to the manufacture of a power capacitor used in a power system, in particular to a defoaming and drying device used when an insulating medium of the power capacitor is impregnated. Background technique [0002] A power capacitor is a high-power capacitor, usually made of insulating paper as a dielectric, aluminum foil or other metal foils, such as metallized polypropylene film, as an electrode, and impregnated in an insulating medium. Power capacitors are widely used in power systems and high-voltage experimental devices to improve the power factor of the power system, reduce the power loss of the transmission line, and improve the stability of the power system. [0003] The self-healing low-voltage shunt power capacitor developed in recent years is made of electrical-grade polypropylene film coated with a layer of metal film on one side as the electrode, immersed in different types of insulating media, and made into a power capac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G4/018H01G13/00
Inventor 杨金保林锡洪高夏琴杨蓉
Owner 上海贵宝机电有限公司
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