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A snow-making and snow-covering method and snow-covered test object suitable for electrical tests

A technology for electrical testing and snowmaking, which is applied in applications, making ice, household appliances, etc. It can solve problems such as relatively high requirements for venues, equipment and temperature conditions, unsuitable repetitive electrical tests, and long snowmaking time, etc., to achieve the goal of using Easy maintenance, uniform snow coverage, and concentrated snow coverage

Active Publication Date: 2018-07-17
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the snowmaking method of the above-mentioned patent takes a long time to make snow, and has relatively high requirements on site, equipment and temperature conditions, so it is not suitable for electrical tests with strong repeatability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A snow-making and snow-covering method suitable for electrical tests, comprising the steps of:

[0028] (1) Freezing of icicles: In January 2016, under the condition that the outdoor temperature in winter was ≤-5°C, an iron bucket filled with 80% distilled water was frozen for 10 hours to obtain cylindrical ice cubes;

[0029] (2) Selection of snowmaking tools: use the 100-type angle grinder as the rotating power, the speed is 11000r / min, use the 125-type bowl-shaped wire wheel as the friction head, install the wire wheel on the angle grinder, and the wire wheel touches the ice ;

[0030] (3) Horizontal and direct snow covering: In a room with a temperature of 5°C, place the post insulator near the ice, turn on the angle grinder, rotate the wire wheel, and press the wire wheel on the side near the ice block from the post insulator , adjust the angle of the steel wire wheel to make the snow flow shoot out horizontally, and the snow flow directly covers a concentrated ar...

Embodiment 2

[0033] A snow-making and snow-covering method suitable for electrical tests, comprising the steps of:

[0034] (1) Freezing of icicles: In December 2015, under the condition of refrigerator temperature ≤ -5°C, put 70% of the volume of distilled water in an iron container and freeze for 3 hours to obtain cube ice cubes;

[0035] (2) Selection of snowmaking tools: use the 100-type angle grinder as the rotating power, the speed is 11000r / min, use the 125-type bowl-shaped wire wheel as the friction head, install the wire wheel on the angle grinder, and the wire wheel touches the ice ;

[0036] (3) Parabolic falling snow: In a room with a temperature of 2°C, place the post insulator 3 m away from the ice, turn on the wire wheel, and press the wire wheel on the far side of the ice block from the post insulator. Adjust the angle of the steel wire wheel so that the direction of the snow flow is obliquely upward, and the angle between the direction of the snow flow and the horizontal ...

Embodiment 3

[0039] A snow-making and snow-covering method suitable for electrical tests, comprising the steps of:

[0040] (1) Freezing of icicles: In December 2015, under the condition that the outdoor temperature in winter was ≤-5°C, the iron buckets were filled with 70% distilled water and frozen for 10 hours to obtain cylindrical ice cubes;

[0041] (2) Selection of snowmaking tools: use the 100-type angle grinder as the rotating power, the speed is 11000r / min, use the 125-type bowl-shaped wire wheel as the friction head, install the wire wheel on the angle grinder, and the wire wheel touches the ice ;

[0042] (3) Horizontal and direct snow cover: In a room with a temperature of 8°C, place the post insulator near the ice, turn on the angle grinder, rotate the wire wheel, and press the wire wheel on the side near the ice block from the post insulator , adjust the angle of the wire wheel to make the direction of the snow flow shoot horizontally, the snow flow directly covers a concent...

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Abstract

The invention belongs to the technical field of artificial snow, and in particular relates to a snow-making and snow-covering method and a snow-covering test object suitable for electrical tests. The snow-making and snow-covering method includes the following steps: freezing of ice cubes: freezing ice cubes outdoors or in a refrigerator in winter; selection of snowmaking tools: using an angle grinder as a rotating power, using a wire wheel as a friction head, and The steel wire wheel is installed on the angle grinder, and the steel wire wheel touches the ice cubes; making snow and covering snow: place the snow-covered sample near the ice cubes, turn on the angle grinder, and the steel wire wheel rotates, adjust the contact position between the steel wire wheel and the ice cube, and use The parabolic drop or the horizontal direct snow covering method is used to cover snow on the snow-covered sample. The snow covering density of the described snow covering sample is 0.08-0.15g / cm3, and the snow covering thickness is 3-8 cm. The snow-making and snow-covering method of the present invention performs snow-making and snow-covering under the condition that the ambient temperature is less than or equal to 10° C., the snow-covering speed is fast and the snow-covering time is short, and the obtained snow-covered test product meets the requirements of the electrical test.

Description

technical field [0001] The invention belongs to the technical field of artificial snow, and in particular relates to a snow-making and snow-covering method and a snow-covering test object suitable for electrical tests. Background technique [0002] The harm of snow weather to the power system is mainly reflected in the reduction of insulation performance of snow-covered insulators leading to flashover accidents and stress damage caused by severe snow accumulation on conductor poles and towers. The development of a fast, efficient, and close-to-real snow-making and snow-covering method suitable for electrical tests is beneficial to carrying out corresponding artificially simulated snowfall tests and preventing the damage caused by snowfall weather to power transmission and transformation equipment in power systems. [0003] Existing snowmaking equipment (snow cannon, spray snowmaking machine, snowflake machine, ice crusher, etc.) is generally developed based on the principle ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25C3/04
CPCF25C3/04
Inventor 卢明刘泽辉王黎明李剑超张楚岩庞锴艾文君李清王超寇晓括赵书杰杨威吕中宾
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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