ELECTRIC DISCHARGE IMITATOR OF CALIBRATION GAS MIXTURES Russian patent published in 2015 - IPC C01B13/11 

FIELD: instrumentation.

SUBSTANCE: invention relates to the field of industrial safety and gas analytical instrument making in part of production of instruments and devices used to perform periodical verification and calibration of gas control instruments to test availability of toxic and explosive gases in air of the production zone of industrial enterprises. An electric discharge imitator of calibration gas mixtures comprises a discharge chamber with inlet and outlet holes, inside of which there are high-voltage electrodes placed. Besides, outside the chamber there is a source of high voltage pulses connected to electrodes and an exciter of atmospheric air flow via the discharge chamber. At the same time the device is placed in a portable screened body, in the cavity of which there is a source of power supply for a spark low-frequency discharge rigidly placed, and an exciter of gas flow. Besides, in the cavity of the body there is a discharge chamber, having a shape of a T-shaped tube, via the long side of which atmospheric air is pumped via the long side by the gas flow exciter. At the same time in its middle on the inner side in the hole with the diameter of D2=3 mm formed by another short tube, joined perpendicularly to the first one, a spark discharge is periodically ignited between the central strand and the body of the chamber connected to the armature of a coaxial cable RK-50, inserted tightly into a short tube with an inner diameter D2 for the distance of L2 aflush with the inner surface of the long tube with inner diameter D1, connected via a silicon tube reaching out from the body of the imitator with length of 800 mm with the inner diameter 4 mm with an inlet nozzle of the inspected gas detector, via a chamber of sensors of which the gas and air mix is pumped, being sampled from the zone of discharge, in the space of which excited atoms, molecules and ions arise, action of which at gas sensitive sensors NO, NO₂, Cl₂, CO, C₃ and others is equivalent to action of gas mixtures of these gases of fixed concentrations in air or other neutral dissolving gas in respect to the sensor, produced in generators of calibration gas mixtures, or action of calibration gas mixtures standardised according to GOST in high pressure vessels.

EFFECT: mobility of a portable device and increased efficiency of calibration and adjustment of gas detectors both under conditions of commercial production and in case of periodical maintenance of gas detectors under conditions of technical services, and in organisations that purchase gas detectors to ensure safety of production with availability of toxic substances in air of a production zone.

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