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Method and special unit for measuring electrostatic safety of nonmetallic materials

A non-metallic material, electrostatic safety technology, applied in the direction of testing dielectric strength, etc., can solve the problems of experimental error, incomplete direct measurement of the electrostatic safety performance of the sample, etc., and achieve the effect of accurate test results.

Inactive Publication Date: 2015-01-28
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the above-mentioned problems in testing and evaluating the electrostatic safety performance of non-metallic materials, the use of this test method does not completely and directly measure the electrostatic safety performance of the sample, resulting in certain experimental errors.

Method used

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  • Method and special unit for measuring electrostatic safety of nonmetallic materials
  • Method and special unit for measuring electrostatic safety of nonmetallic materials
  • Method and special unit for measuring electrostatic safety of nonmetallic materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 and figure 2 As shown, a special equipment for measuring the electrostatic safety performance of non-metallic materials, including:

[0034] A dust wind flow generation system; including air compression equipment, an air storage tank, an air dryer, an air filter and a dust generator connected sequentially through pipelines, and a valve and a flow meter are sequentially arranged between the air filter and the dust generator ;

[0035] An electrostatic generator box; including a test box 1 with an explosion-proof diaphragm on the inner wall and a temperature and humidity sensor, the test box 1 is connected to the dust generator through a pipeline 2, and the box 1 is provided with a pole 3 and An operating table 4 hinged to the pole 3 for fixing the sample, the operating table 4 is provided with an electrostatic sensor 5;

[0036] An electrostatic discharge box; including a test box 1 provided with an explosion-proof diaphragm and a temperature and hum...

Embodiment 2

[0041] A method for measuring the electrostatic safety performance of non-metallic materials by using the above-mentioned measuring device; comprising the following steps:

[0042] a. Determine the experimental parameters: the temperature of the collected non-metallic materials is 20°C, the humidity is 30%, the dust concentration is 30%, the wind speed is 40m / s, the methane concentration is 6%, the oxygen concentration is 21%, and the The environmental parameters have been stable, and the collected values ​​are used as experimental parameters;

[0043] b. Fix the sample: tilt the sample to be tested on the electrostatic sensor on the operating table, and seal the electrostatic generating box;

[0044] c. Adjust the discharge electrode gap in the electrostatic discharge box, seal the electrostatic discharge box, and inject explosive gas into the electrostatic discharge box, and set the ambient temperature of the static electricity generation box and the electrostatic discharge ...

Embodiment 3

[0052] A method for measuring the electrostatic safety performance of non-metallic materials by using the above-mentioned measuring device; comprising the following steps:

[0053] a. Determine the experimental parameters: temperature and humidity, dust concentration, wind speed, explosive gas concentration, oxygen concentration;

[0054] A non-metallic material is about to be used in a certain coal mine. Under normal circumstances, the relevant data of the underground environment of the coal mine are as follows:

[0055] temperature range: 0～40℃ Humidity range: 5～98% Dust concentration range: 0~1000mg / m 3 Wind speed range: 0~50m / s Methane concentration: 5～16% Oxygen concentration: 20～30%

[0056] Determine the experimental parameters:

[0057]

[0058] b. Fix the sample: tilt the sample to be tested on the electrostatic sensor on the operating table, and seal the electrostatic generating box;

[0059] c. Adjust the discharg...

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Abstract

The invention belongs to the field of coal mining and particularly relates to a method and a special unit for measuring electrostatic safety of nonmetallic materials. The special unit comprises a dust and air generation system, an electrostatic generating box, an electrostatic discharge box, a dust treatment system and an explosive gas receiver, which are connected in sequence. The special unit further comprises an explosive gas detector connected with the electrostatic discharge box. The problem that the electrostatic safety of nonmetals cannot be directly measured by the existing measurement means which has large test errors is solved. Simulation on nonmetals application environment for testing the live performance of the nonmetals according to the principle of frictional electricity is provided for the first time. Measurement by the unit and method is accurate, direct and visual. Certain technical references for the study on live performance of nonmetals are provided.

Description

technical field [0001] The invention belongs to the field of coal mining, in particular to a method for measuring the electrostatic safety performance of non-metallic materials and special equipment. Background technique [0002] 90% to 95% of the particles floating in the air are positively and negatively charged. The charge of dust particles depends not only on the particle size and density of the dust, but also on the temperature and humidity of the environment at that time. When charged dust is close to non-metallic materials (especially polymer materials) with poor electrostatic safety performance, the non-metallic materials are absorbed and accumulated or triboelectrically generated to form charged objects, which can cause electrostatic potentials as high as tens to hundreds Thousand volts, due to the large contact area between fine dust and oxygen, when the electrostatic voltage meets the discharge conditions, a discharge phenomenon will occur, and the discharge spark...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
Inventor 孔令刚周植鹏巨广刚杨华运雷文龙李少辉郭洪祥王范树卢宁
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD