Sampling pump cleaning device with automatic control function and cleaning method

Abstract

The invention discloses a sampling pump cleaning device with an automatic control function. The sampling pump cleaning device comprises a cleaning pipeline and a control unit; the first end of the cleaning pipeline is connected with cleaning liquid, and the second end of the cleaning pipeline is connected with a sampling pump through an electrically operated valve, wherein the cleaning liquid canbe pumped into the sampling pump through one port of the electrically operated valve via the second end of the cleaning pipeline and is used for cleaning the sampling pump; and the control unit is connected with the electrically operated valve and used for controlling the electrically operated valve to be opened or closed. The device for cleaning the sampling pump is convenient to use and capableof being automatically controlled. In addition, the invention further discloses a cleaning method of the sampling pump cleaning device with the automatic control function.

Description

technical field [0001] The invention relates to the technical field of sampling pump cleaning of ambient air sampling equipment, in particular to a sampling pump cleaning device with automatic control and a cleaning method. Background technique [0002] 1. Volatile organic compound VOC sampling equipment is mainly used in environmental protection, sanitation, labor, security inspection, military, scientific research, education and other departments for the collection of various volatile gases. The general principle of VOC sampling equipment is generated by the sampling pump The negative pressure is used to collect gas VOC, and there are other pollutants in the gas collected under normal working conditions, resulting in residual pollutants in the sampling pump during the work of the sampling pump, which will cause instability and damage to the flow of the sampling pump after accumulation , air leakage, etc., have a serious impact on the normal operation of the sampling equipm...

AI Technical Summary

Problems solved by technology

[0002] 1. Volatile organic compound VOC sampling equipment is mainly used in environmental protection, sanitation, labor, security inspection, military, scientific research, education and other departments for the collection of various volatile gases. The general principle of VOC sampling equipment is generated by the sampling pump The negative pressure is used to collect gas VOC, and there are other pollutants in the gas collected under normal working conditions, resulting in residual pollutants in the sampling pump during the work of the sampling pump, which will cause instability and damage to the flow of the sampling pump after accumulation , air leakage, etc., have a serious impact on the normal operation of the sampling equipment, so cleaning the sampling pump is of great significance to the durability and practicability of the sampling equipment

[0003] 2. The traditional cleaning method of sampling equipment is to manually insert alcohol and other cleaning fluids into the sampling nozzle interface. This cleaning process is very complicated and the cleaning effect is not good.

[0004] 3. The traditional cleaning method needs to clean the entire sampling gas path of the sampling equipment, which is easy to form residues of cleaning fluid and pollutants, causing secondary pollution and affecting the normal sampling work of the VOC sampling equipment

[0005] 4. Many circuit sensors are connected in parallel in the sampling gas path of VOC sampling equipment. When cleaning in traditional cleaning methods, there is a risk of cleaning liquid infiltrating into the electronic components of the sensor, which affects the accuracy and service life of the sensor.

[0006] 5. The traditional sampling equipment cleaning method has slow response speed and long feedback time when adjusting the cleaning pressure and cleaning state, and cannot accurately control the cleaning process of the sampling pump

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