An electrostatic spark energy evaluation device and evaluation method under variable initial pressure in an inert atmosphere

Abstract

An electrostatic spark energy evaluation device and evaluation method under variable initial pressure in an inert atmosphere belong to the field of explosion safety science. The electrostatic spark energy evaluation device under variable initial pressure in an inert atmosphere includes an electric spark generating device, a data acquisition device and a gas distribution device. Through this device, the spark energy can be achieved at 32mJ-3J, the electrode gap at 0-10mm and the electrode angle at 180-90 o The continuous adjustment between them, at the same time, enables the replacement of electrodes of different materials and tip shapes. Through the gas distribution device, the initial pressure of the spark generating chamber can be adjusted within 0-5 bar and the establishment of various inert gas atmospheres in the spark generating chamber can be realized. Through the evaluation method of the electrostatic spark energy evaluation device under the variable initial pressure of the inert atmosphere, the electrostatic spark energy under different parameters can be evaluated within the energy range of 32mJ-3J.

Description

technical field [0001] An electrostatic spark energy evaluation device and evaluation method under variable initial pressure in an inert atmosphere belong to the field of explosion safety science. Background technique [0002] In the process of production and processing, fire and explosion accidents caused by static sparks occur frequently and cause great harm. The electrostatic spark discharge process is a dynamic energy release process, which is affected by many factors. These factors are mainly divided into two categories, circuit parameters and non-circuit parameters. Circuit parameters mainly include: energy (capacitance and voltage), load inductance, load resistance, etc. Non-circuit parameters mainly include: environmental variables (air pressure, gas composition, temperature, humidity, air flow speed, etc.), electrode parameters (gap, diameter , shape, material, etc.). Therefore, the evaluation of electrostatic spark energy for different energies, electrode paramet...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the existing electrostatic spark energy measurement devices are ignition energy measurement devices for combustible substances under normal temperature and pressure (CN101692081A, CN105891254A). These devices have few variable parameters except energy, or can not simultaneously realize multiple parameters on the same device. regulation (CN104897305A)

Among them, there is no simultaneous exploration of spark energy and shock wave characteristics.

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