Device and method for preparing insulating oil immersed insulating paper

A technology of insulating oil and insulating paper, which is applied in the preparation of test samples, paper, papermaking, etc. It can solve the problems of oil-paper insulation performance, easy breakdown, and large test dispersion, so as to eliminate test interference and reduce other problems. Effects of factors to ensure the accuracy of the test

Pending Publication Date: 2019-03-19
NORTH CHINA ELECTRICAL POWER RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Oil-paper composite insulation is the main insulation system of oil-immersed transformers. When preparing oil-paper insulation systems, there are many substances that affect the insulation performance of oil-paper and are not related to the characteristics of oil and paper materials, such as moisture, air and various impurities. When researching the insulation performance of oil-paper, those skilled in the art do not want other factors to intervene so as to affect the test results, or cause the test dispersion to be too large. Considering that insulating oil (such as vegetable oil) has a greater kinematic viscosity, it is difficult to fully impregnate the paper, and A certain amount of air will be dissolved in the oil. At this time, there is also air in the pores that are not impregnated on the paper. The dielectric constant of the air is close to 1, and the electric strength of the air is lower than that of the insulating oil, so it is easier to break down and affect the insulation of the oil paper. Performance can make a big difference

Method used

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  • Device and method for preparing insulating oil immersed insulating paper

Examples

Experimental program
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Effect test

Embodiment 1

[0050] This embodiment provides a device for preparing insulating oil-impregnated insulating paper, wherein the schematic structural diagram of the device for preparing insulating oil-impregnated insulating paper is as follows figure 1 shown, from figure 1 It can be seen that it includes:

[0051] Suction filtration unit (not shown in the figure), first vacuum drying degassing and dehydration unit (not shown in the figure), second vacuum drying degassing and dehydration unit (not shown in the figure), vacuum sealed tank 1, Oil pool 2, the third vacuum drying degassing and water removal unit (not shown in the figure) and insulating oil storage tank 3;

[0052] The suction filter unit is used to filter the insulating oil to remove impurities therein, and the filter used in the suction filter unit is an organic filter with a pore size of 0.45 μm; in this embodiment, the suction filter unit can be a suction filter bottle;

[0053] The first vacuum drying and degassing and dehyd...

Embodiment 2

[0061] This embodiment provides a method for preparing vegetable oil-impregnated insulating paper, wherein the method is realized by using the device for preparing insulating oil-impregnated insulating paper provided in Example 1, and the method includes the following steps:

[0062] (1) Cut the insulating paper to a suitable size, put it into a vacuum drying oven and dry it at a temperature of 90° C. for 24 hours to degas and remove water;

[0063] Use a suction filter bottle to filter the vegetable oil to remove impurities contained therein, then put the filtered vegetable oil into another vacuum drying oven and dry it under vacuum at 60°C for 24 hours to degas it , except water;

[0064] Put the pretreated insulating paper and the pretreated vegetable oil into the oil pool and the insulating oil storage tank respectively and insert the oil pipe into the insulating oil storage tank;

[0065] (2) Open the vacuum pump and the vacuum valve of the vacuum pump to vacuumize the v...

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Abstract

The invention provides a device and method for preparing insulating oil immersed insulating paper. The device comprises a vacuum sealing tank, an oil pool and an insulating oil storage tank; the oil pool is arranged in the vacuum sealing tank and is used for holding insulating oil and insulating paper; an air hole is formed in the top of the vacuum sealing tank, and a vacuum pump is connected withthe air hole; an oil inlet is formed in the upper part of the side wall of the vacuum sealing tank, and the insulating oil storage tank is connected with the oil pool by the oil inlet by virtue of anoil pipe so that the insulating oil in the insulating oil storage tank is injected into the oil pool; and the oil pipe is provided with an oil inlet valve. The invention further provides the method for preparing the insulating oil immersed insulating paper. The device is equipment capable of achieving an effect of sufficiently immersing oil and is capable of eliminating experimental disturbance,reducing experimental errors and guaranteeing experimental precision as much as possible; and by using the method, the reliability of the insulating oil immersed insulating paper can be further improved, influences from other factors can be reduced, and over-high dispersion possibly existing during an experiment can be reduced.

Description

technical field [0001] The invention relates to a device and method for preparing insulating oil-impregnated insulating paper, and belongs to the technical field of insulating paper production and equipment used for production. Background technique [0002] Oil-paper composite insulation is the main insulation system of oil-immersed transformers. When preparing oil-paper insulation systems, there are many substances that affect the insulation performance of oil-paper and are not related to the characteristics of oil and paper materials, such as moisture, air and various impurities. When studying the insulation properties of oil-paper, those skilled in the art do not want other factors to intervene so as to affect the test results, or cause the test dispersion to be too large. Considering that insulating oil (such as vegetable oil) has a greater kinematic viscosity, it is difficult to fully impregnate the paper, and A certain amount of air will be dissolved in the oil. At thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H23/32D21H23/66D21H25/06G01N1/31
CPCG01N1/31D21H23/32D21H23/66D21H25/06
Inventor 郭绍伟郝震马继先龙凯华邬彦威覃颔袁文迁周远翔廖炫凯
Owner NORTH CHINA ELECTRICAL POWER RES INST
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