Gas constant pressure automatic sampling device for syringe type sample tube

Abstract

The invention discloses a set of syringe type sample tube gas constant pressure automatic sampling device, which is driven by a two-way cylinder piston to drive the syringe drive plate to push the syringe injection handle on the guide rod to perform linear precession, and is composed of a rotary cylinder and a rotary drive and a rotary gripper. Use hands together to control the rotation and switch action of the three-way guide valve of the syringe, cooperate with the combination of the sample guide valve, purge valve, and maintenance valve body on the gas connection pipeline, so that the collected greenhouse gas samples can be injected from the sample tube at a certain sampling rate. Enter the gas enrichment device through the sample tube valve. After the injection of a sample is completed, the two-way cylinder piston is released and returns, and the syringe driving plate quickly returns to the original initial position on the guide rod. At the same time, the rotary cylinder and the rotary drive combination will The three-way pilot valve of the syringe is closed, the remaining gas in the sample tube is reserved for repeated testing, and a complete sampling process is completed. The invention ensures the integrity, uniformity and speed of sample injection, saves time and effort, improves stability and accuracy, and has good use and popularization value.

Description

technical field [0001] The invention relates to a set of syringe type sample tube gas constant pressure automatic sampling device. Background technique [0002] People refer to gases that absorb surface infrared radiation and increase the temperature of the surface and near-surface atmosphere as greenhouse gases (Green house gas). In recent years, as the global climate continues to warm, people pay more and more attention to the greenhouse effect of greenhouse gases. Many companies at home and abroad have also successively developed greenhouse gas analysis and testing instruments, such as IsoPrime's TraceGas automatic online pre-concentration and purification system; SerCon's Cryoprep trace gas sample preparation system; Thermo's PreCon trace gas pre-concentration device, etc., all These devices all need to be connected with specific sample bottles for collecting samples, so that the collected gas samples can be sent to these devices for analysis and determination of variou...

AI Technical Summary

Problems solved by technology

For example, Thermo's PreCon trace gas pre-concentration device needs to use a 100ml special double-valve glass bottle with a valve, which is not convenient for field sampling; when the sample is injected, the purging He gas must be introduced to carry the sample gas from the sample bottle Enter the cold trap, so the utilization rate of the diluted 100ml sample is low, it takes a long time to enrich, and the required amount of the sample cannot be controlled by itself, and manual operation will affect the stability

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