Sampling method for HY-MK05B dew point detection module

Abstract

The invention relates to the technical field of gas detection equipment, in particular to a sampling method for an HY-MK05B dew point detection module. The method comprises the following steps: a gasinlet is connected and fixed to a clamping sleeve joint through threads, and a gas outlet is fixed to a gas outlet channel through threads; sample gas enters a filter cavity from the gas inlet below,and a filter unit in the filter cavity fully filters oil substances and particulate matters in the sample gas; the filtered sample gas vertically and upwards reaches a measuring cavity; and after a dew point transmitter measures the components of the sample gas, the sample gas is transversely discharged from the gas outlet at 90 degrees. By adopting the system, the dew point transmitter can be effectively protected, and the service life of the dew point transmitter is greatly prolonged; a good and standard detection environment is created for the dew point transmitter, so that dew point detection data of the sample gas is real and credible; and the sampling structure and the gas main pipeline are of a split structure, and fault maintenance and related gas circuit fault judgment are facilitated.

Description

technical field [0001] The invention relates to the technical field of gas detection equipment, in particular to a sampling method for a HY-MK05B dew point detection module. Background technique [0002] The HY-MK05B dew point detection module is mainly used for the dew point detection of the outlet gas of the locomotive compressed air dryer. The dew point (moisture content) of the sample gas is detected by collecting the outlet gas of the dryer. The main measurement principle is the resistance-capacitance principle or the electrochemical principle. The measuring devices are collectively referred to as dew point transmitters. Using a dew point transmitter to monitor the water content of the sample gas online has good compatibility and stability, but the impurities in the sample gas will affect the detection results to a certain extent. The oil impurities in the sample gas will be adsorbed on the surface of the probe to form an oil film, which will prevent the contact betwee...

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Problems solved by technology

Using a dew point transmitter to monitor the water content of the sample gas online has good compatibility and stability, but the impurities in the sample gas will affect the test results to a certain extent

The oil impurities in the sample gas will be adsorbed on the surface of the probe to form an oil film, which will prevent the contact between the dew point probe and the water molecules in the sample gas, resulting in a large measurement error of the dew point transmitter

The dust particles in the sample gas will mix with water or oil, and the mixture will deposit and adhere to the probe part of the dew point transmitter or various links of the gas circuit system, which may cause dew point measurement errors and affect the flow rate of the sample gas. The probe heating system itself is wrong, causing overheating or short circuit, burning the dew point transmitter probe

The dew point detection system currently applied to the locomotive dryer is not equipped with a sample gas filter unit

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