Air-suction type space dust-charge test device

Abstract

An air-suction type space dust-charge test device belonging to the field of charge test devices comprises an external test cylinder and an internal test cylinder, wherein an insulation ring is arranged between the external test cylinder and the internal test cylinder; the internal test cylinder is connected with a BNC connector on the external test cylinder through a lead; the BNC connector is connected with a carrying-capacity output device; filtering material is arranged in the internal test cylinder; air suction nipples are respectively arranged at the bottoms of the internal test cylinder and the external test cylinder; a taper cylinder is arranged between the filtering material and the air suction nipples; and the air suction nipples are connected with an air suction device. The invention adopts flanges to couple pipelines or containers in sealed manner, and then suspended dusts in pipelines or containers can enter the dust-charge test device under the suction effect of the air suction device to overcome the inaccuracy of measurement caused by overlong length or diverse shapes of pipelines or containers, thus reducing the error of charge test result of the suspended dusts in space to the lowest point and ensuring the accuracy of the test result.

Description

technical field [0001] The invention belongs to the field of charge testing devices, in particular to an air-pumping space dust charge testing device. Background technique [0002] In recent years, dust explosion accidents in coal mines, electric power, textiles, grains and so on are not uncommon at home and abroad, seriously endangering human life and production safety, causing huge casualties and property losses. Most of these dust explosions are caused by the electrostatic accumulation and discharge of dust. In addition, in the industry, explosions caused by dust static electricity, especially the static electricity of hydrocarbon powders with low moisture content and polymer compound powders with high insulation, occur frequently, accounting for a certain proportion. [0003] According to reports, on March 15, 1987, a huge dust explosion occurred in the Harbin flax factory, killing 58 people, seriously injuring 177 people, and causing a direct economic loss of more than...

AI Technical Summary

Problems solved by technology

Non-contact electrometers generally have strict requirements on the test distance, and the application range is narrow

The contact electrometer cannot directly measure the amount of charge generated by the dust running in the pipeline or container.

Therefore, neither of them can meet the demand for testing the charge of charged dust in the state of space suspension.

[0006] At present, the probe method is a common method used to measure the charge of suspended dust in pipelines or containers. However, due to the various shapes of pipelines or containers and the long lines of pipelines or containers, the measurement error of the probe method is very large.

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