A gas autosampler

Abstract

The invention discloses an automatic gas sample feeder. The automatic gas sample feeder comprises a propeller, a transmission device, a sample chain and a sample feeding cone, wherein the propeller comprises a stepping motor I, a screw rod, a sliding block and an optical shaft which are sequentially connected; the sliding block is capable of moving along the optical shaft; the sliding block is connected with an L-shaped pressing block; the transmission device comprises a stepping motor II and a driving gear; the driving gear is matched with a driven gear by virtue of a belt; the driven gear is connected with a transmission gear by virtue of a transmission shaft; the sample chain comprises at least one cylinder; a spring hoop is fixed on one end of the cylinder; the cylinder is arranged in a gear position of the transmission gear; an injector is fixed on the other end of the spring hoop; an outlet of the injector passes through the cylinder and extends to the other end of the cylinder; one end of the L-shaped pressing block is capable of pushing a push rod of the injector and pressing a one-way valve connected with the outlet of the injector into the cone of the sample feeding cone. According to the automatic gas sample feeder, the injector is directly used as a sample feeding bottle, the transfer times can be reduced; the pollution possibility can be reduced; meanwhile, the sample chain is capable of increasing and reducing the gear number according to the requirements; the motors control for feeding the samples for multiple times, so that the samples can be automatically fed by unmanned operation.

Description

technical field [0001] The invention relates to a gas automatic sampler, belonging to a sampler in the field of ecological environment. Background technique [0002] Gas samples are different from liquid or solid samples, because they are more likely to be lost, the measurement is mainly realized through manual sampling (except for online instruments). In the analysis of gas components, sampling is one of the main sources of quantitative analysis errors, especially It is an analysis of manual sample injection. Different operators have different injection speeds and pressures. Even if the same operator injects samples before and after, it is difficult to maintain consistency. [0003] In addition, the samples have to go through the steps of collection, transportation, sampling and determination. The process is cumbersome, and most of them are manual operations, which will also introduce a lot of uncertainty. At present, hard bottles are used as sample bottles for collection a...

AI Technical Summary

Problems solved by technology

[0002] Gas samples are different from liquid or solid samples, because they are more likely to be lost, the measurement is mainly achieved through manual sampling (except for online instruments). In the analysis of gas components, sampling is one of the main sources of quantitative analysis errors, especially It is an analysis of manual sample injection. Different operators have different sample injection speeds and pressures. Even if the same operator injects samples before and after, it is difficult to maintain consistency.

[0003] In addition, the samples have to go through the steps of collection, transportation, sampling and determination. The process is cumbersome, and most of them are manual operations, which will also introduce a lot of uncertainty. At present, hard bottles are used as sample bottles for collection and sampling, and vacuum is used before sampling. When sampling, the sample gas is pressed into the bottle to generate a certain positive pressure. When the sample is injected, it is injected into the sample inlet of the instrument under the action of pressure. However, it is difficult to keep the pressure in the sample bottle consistent. Different pressures will make the volume in the quantitative loop The difference is an important reason for the poor repeatability of the sample, and the incomplete cleaning of the container and poor air tightness will also affect the results.

There is currently no low-cost, reliable gas autosampler available

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