Patent ID: 11971349
Assignee: NCS TESTING TECHNOLOGY CO., LTD
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A combined oxygen, nitrogen and hydrogen joint determination device based on thermal conductivity-infrared technique, comprising a melting and extraction system, an analytical gas transmission system, a signal detection system and a signal analysis system;
the melting and extraction system comprises a carrier gas introduction pipeline, a chamber valve, an impulse furnace and a dust filter communicated in sequence, wherein the carrier gas introduction pipeline is connected with two intake tubes and configured for introducing different carrier gases, the carrier gas introduction pipeline comprises an intake switching valve, a carrier gas valve, a purifying furnace and a carrier gas purification reagent tube connected in sequence, the carrier gas purification reagent tube is in fluid communication with the chamber valve, and the intake switching valve is connected with two intake tubes and configured for introducing different carrier gases; and the two intake tubes are respectively a first air tube and a second air tube, and high-purity He is introduced into the first air tube as a carrier gas, and high-purity N2 is introduced into the second air tube as a carrier gas;
the analytical gas transmission system comprises a flush valve, a bypass valve, a mass flowmeter and a first switching valve communicated in sequence, wherein the flush valve is in fluid communication with the dust filter, the bypass valve is in fluid communication with the chamber valve, the first switching valve is respectively connected with a converter and a second switching valve, the converter is in fluid communication with the second switching valve, the analytical gas transmission system also comprises a reference valve and a needle valve, the reference valve is in fluid communication with the chamber valve, and the needle valve is in fluid communication with the reference valve;
the signal detection system comprises an infrared (IR) cell, an analysis purification reagent tube and a thermal conductivity (TC) cell communicated in sequence, wherein the IR cell is in fluid communication with the second switching valve, and the TC cell is in fluid communication with the needle valve;
the signal analysis system comprises a controller and a processor, wherein the controller is electrically connected with the processor, and the controller is electrically connected with the IR cell and the TC cell respectively; and the chamber valve, the flush valve, the bypass valve, the first switching valve, the second switching valve, the reference valve and the needle valve are all electrically controlled valves and are electrically connected with the controller respectively, and the controller is configured to the open and close the different gas paths by controlling the opening and closing of the different electrically controlled valves so as to realize joint determination modes of different gases.