Extensible long-distance multi-path gas sampling expansion device

Abstract

The invention provides an extensible long-distance multi-path gas sampling extension device, which comprises a direct-acting electromagnetic valve group, a quick-change connector, a multi-path I/O signal isolation amplifier, a wiring terminal module, a power supply module, a main control board, an inert material hose and a case, and is provided with six sampling gas inlets, the device is provided with six sampling gas inlets, the sampling gas inlets are respectively connected with the two direct-acting electromagnetic valve groups through the three-way adapter, the two direct-acting electromagnetic valve groups are respectively and directly connected with the sampling gas inlets and the to-be-sampled gas inlet, one of the two valve groups is used for sampling, and the other valve group is used for to-be-sampled gas, so that the purging waiting time of the next path of gas can be effectively reduced; the main control board is used for carrying out gas path on-off control on the electromagnetic valve, so that disordered switching of multiple gas paths is realized, the purpose of gas multi-path sampling is further achieved, and 1km long-distance sampling can be realized at most; the device is provided with a gas path expansion interface which can be connected with an expansion device to expand a sampling gas path according to actual requirements; the device is further provided with an external communication interface, and the gas circuit state can be monitored in real time and the gas circuit can be controlled to be switched on and off through related communication means; and the device is matched with an extensible long-distance multi-path gas sampling device (hereinafter referred to as a main control device) for use, the number of sampling gas paths can be expanded, and the utilization rate of an analytical instrument is improved.

Description

technical field [0001] The invention relates to the field of gas sampling, in particular to an expandable remote multi-channel gas sampling expansion device. Background technique [0002] Most of the multi-channel sampling currently involved in the field of atmospheric sampling is to analyze the existing collected samples, and it is impossible to perform long-distance sampling; and the existing multi-channel analysis device has no expansion device for the time being, and can only The number of channels is analyzed and tested, and the efficiency needs to be further improved. Contents of the invention [0003] The invention provides an expandable long-distance multi-channel gas sampling expansion device, which can expand 6 sampling points, and can superimpose multiple expansion devices according to needs, so as to achieve the required number of sampling points and greatly improve monitoring efficiency; and through correlation The communication means can remotely set the sam...

AI Technical Summary

Problems solved by technology

[0002] Most of the multi-channel sampling currently involved in the field of atmospheric sampling is to analyze the existing collected samples, and it is impossible to perform long-distance sampling;

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