Sample preparation mold and sample preparation method for electrical performance test of external insulation anti-pollution flashover coating

Abstract

This application provides a sample preparation mold for the electrical performance test of the external insulation anti-fouling flashover coating, including a frame, a front steel plate, a rear steel plate, a left steel plate, a right steel plate, a bottom steel plate, a ball screw pair in an up and down direction, and a ball screw pair in a left and right direction. Lead screw pair, left power unit, right power unit, steel blade; this application also provides a sample preparation method for the electrical performance test of the external insulation anti-fouling flashover coating, which is realized by using the above-mentioned sample preparation mold; it can solve the problem of traditional sample preparation. The sample obtained by the method is prone to the problems of uneven thickness, uneven surface and a large number of bubbles; and the influence of the surface humidity of the sample on the sample is reduced, and the accuracy of the coating in the electrical insulation performance test is improved; and Multiple samples can be produced at one time, reducing the influence of the paint manufacturing process on the samples, improving the repeatability of the test, and reducing errors; in order to finally provide accurate electrical insulation performance data for the external insulation anti-pollution flashover coating to be tested. Base.

Description

technical field [0001] The invention relates to the field of electrical insulation performance test research of an external insulation anti-pollution flashover coating, in particular to a sample preparation mold and a sample preparation method for the electrical performance test of an external insulation anti-pollution flashover coating. Background technique [0002] External insulation anti-fouling flashover coatings have been widely used in power transmission and transformation projects in my country due to their good hydrophobicity, hydrophobicity migration, electrical insulation, and on-site molding. Due to serious air pollution in some heavy industrial areas and other reasons, external insulation anti-pollution flashover coatings need to be continuously developed and upgraded. [0003] The newly developed external insulation anti-fouling flashover coating needs to be tested for electrical insulation performance. According to the standard "DL / T 627-2012 Room Temperature C...

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Problems solved by technology

The pouring method pours the anti-fouling flashover coating directly on the mold to make the coating level naturally. However, this method is prone to uneven coating thickness due to uneven pouring during the pouring process, and the bubbles during pouring cannot fully overflow, resulting in The coating is prone to the problem of a large number of bubbles

[0005] The dipping method directly immerses the substrate (commonly used copper sheet) into the anti-fouling flashover coating, drips dry in the air, and repeatedly dips to achieve the required thickness of the test. However, due to the method of dripping and drying, the sample is prone to flow. , wire drawing phenomenon, and the impregnation method cannot obtain thicker samples

[0006] At present, in the prior art, the test sample preparation method and the vacuum degassing device (patent number: 201410779376.7) of normal temperature curing silicone rubber coatings adopt vacuum degassing method to accelerate the preparation of samples. This method is only suitable for silicone rubber coating and cannot Avoid the rapid volatilization of other anti-fouling flash coating solvents to make the surface of the sample uneven

In addition, a PRTV paint detection sample preparation mold and its sample preparation method (patent number: 201710743428.9) This method proposes a simple PRTV sample preparation mold, which is similar to the traditional pouring method, only increasing the number of grooves, and cannot avoid the traditional Uneven thickness caused by the method, surface unevenness caused by air bubble exclusion, etc.

[0007] Therefore, the above-mentioned prior art cannot meet the requirements of uniform coating thickness, smooth surface and no bubbles of the electrical insulation performance test sample of the external insulation anti-pollution flashover coating; moreover, the above-mentioned methods all require that the surface of the sample be Long-term exposure to the air, the water molecules in the air are easy to form a water film on the surface, which affects the results of the electrical insulation performance test of the sample, especially the dielectric properties of the sample; finally, the above-mentioned traditional methods can only produce However, since every step of the coating manufacturing process will affect the final coating, and then affect the electrical performance test results of the sample, it is difficult to repeat each step accurately during the sample manufacturing process, which will affect the final electrical performance. The test results cause errors, and the repeatability of the test is poor

[0008] Therefore, how to solve the problems that the coating obtained by the traditional sample preparation method is prone to uneven thickness, uneven surface and a large number of bubbles;

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