A dual-capacity gas differential pressure injection-suction balanced mixed-flow quantitative sampling device

Abstract

The invention discloses a dual-capacity gas differential pressure jet pumping and balanced mixing quantitative sample injection device and relates to the technical field of quantifying devices. The dual-capacity gas differential pressure jet pumping and balanced mixing quantitative sample injection device comprises a case, a dual-capacity gas quantifying tube and a carrier gas vacuum distribution valve, wherein the dual-capacity gas quantifying tube comprises a 5mL / 20mL conversion six-way valve, a sampling / sample injection conversion six-way valve sample injection channel and four quantifying tubes connected with pipe orifices of the 5mL / 20mL conversion six-way valve and the sampling / sample injection conversion six-way valve; and the carrier gas vacuum distribution valve comprises a micro-positive pressure reducing valve and a jet pumping and mixing valve. The total time of quantitative sample injection of a single sample is short, and the used labor is low; a detection sample is conveyed through a pipe, and the sample consumption is low, so that the liquefied gas sampling inspection work of a quality supervision department is greatly facilitated, and the laboratory environment and the security are greatly improved; and a gross error caused by artificial quantifying of a syringe method is eliminated through the quantifying tubes with the constant volume, so that the accuracy and repeatability of the detection result are ensured.

Description

technical field [0001] The invention relates to the technical field of quantitative devices, in particular to a dual-capacity gas differential pressure injection-suction balanced mixed-flow quantitative sampling device. Background technique [0002] Low-pressure liquefied gas and mixed gas have been widely used in various aspects of production and life. The sulfur content in its components is a restrictive index. It is very necessary to accurately and quickly measure the sulfur content in the components of low-pressure liquefied gas and mixed gas. , and the accurate and fast determination of the sulfur content in the components of low-pressure liquefied gas and mixed gas is firstly to re-gasify the liquid low-pressure liquefied gas and mixed gas into normal pressure or slightly positive pressure unsaturated gaseous low-pressure liquefied gas and mixed gas, and After being measured by a quantitative device, it is sent to an instrument to analyze the sulfur content. [0003] ...

AI Technical Summary

Problems solved by technology

[0003] The existing quantitative device measurement process is generally the syringe injection method, which is easy to cause gross errors in the sampling and injection instrument detection. Whether the total sulfur content in the sample is measured by the electric quantity method or the ultraviolet fluorescence detection method, the syringe is used as a sampling valve to quantify The method of tube, whether it is the volume of each sample or the rate of sample injection, is not easy to control manually by the inspectors, and requires high proficiency in the operation of the inspectors. A sample often needs to be tested multiple times to remove outlier data. It can complete the inspection work, and the analysis and sampling efficiency is low, which affects the accuracy and repeatability of the analysis data

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