Multipoint gas monitoring device

Abstract

The invention provides a multi-point gas monitoring device, comprising: a selective sampling cylinder, a plurality of sampling connecting pipes, a rotating connecting pipe, a driving part, a first gas detection unit, a first power unit, a second power unit, and a plurality of sampling One end of the connecting pipe is installed on the air inlet surface of the selective sampling cylinder and forms a circle, one end of the rotating connecting pipe is in contact with the air inlet surface of the selective sampling cylinder, the other end communicates with the first gas detection unit, and the driving part is connected with the rotating The tube drive connection is used to drive the intake end of the rotary connection tube to rotate around the circle formed by a plurality of sampling connection tubes on the air intake surface, and connect the rotary connection tube and each sampling connection tube in turn. The first power unit and The sampling barrel is selected to be connected, and the second power unit is connected to the gas path connected with the rotating connecting pipe. The present invention can carry out uninterrupted sampling detection on the components of the gas at different positions, such as the content of water and oxygen, harmful gases, and cleanliness. And the measurement accuracy is high, the volume is small, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, and in particular relates to a multi-point gas monitoring device. Background technique [0002] The traditional ambient gas monitoring system is a single-point sampling detector, and the gas nozzle that collects the ambient gas is placed at the position that needs to be monitored. If there are multiple locations to be detected, there are generally two detection methods at present: the first detection method uses a single-point sampling detector for detection, and the detection method is to place the gas nozzle at a detection point and detect After the completion, place the gas nozzle at another detection point for detection. Since the position of the sampling gas nozzle needs to be moved, this detection method is not suitable for multi-point detection in a closed environment; or multiple single-point sampling detection The detector detects multiple detection points simultaneousl...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that in the pipeline where the solenoid valve is closed, the gas in the pipeline is in a static state. When the solenoid valve is turned on, the gas trapped in the pipeline needs to be completely replaced before it can be accurately detected. The gas at the location of the monitoring point

In addition, since a valve island is connected to multiple air pipes, the corresponding air pipes in the valve island have gas in each air pipe, and when detecting the gas in the air pipe closest to the total outlet end of the valve island, the gas is easily absorbed by the air pipe in the valve island. The gas pollution that stays far away from the total outlet affects the accuracy of detection

Moreover, the existing gas sampler has a large volume

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