Multipoint gas monitoring device

Abstract

The invention provides a multipoint gas monitoring device. The multipoint gas monitoring device comprises a selective sampling drum, multiple sampling connecting pipes, a rotary connecting pipe, a driving part, a first gas detection unit, a first power unit and a second power unit, wherein one ends of multiple sampling connecting pipes are arranged on the air inlet surface of the selective sampling drum and form a circle, one end of the rotary connecting pipe is contacted with the air inlet surface of the selective sampling drum, the other end of the rotary connecting pipe is communicated withthe first gas detection unit, the driving part is connected with the rotary connecting pipe in a driving way and used for driving the air inlet end of the rotary connecting pipe to do circular rotation around the circle formed by multiple sampling connecting pipes on the air inlet surface and be sequentially connected with the rotary connecting pipe and each sampling connecting pipe, the first power unit is connected with the selective sampling drum, and the second power unit is connected in a gas circuit communicated with the rotary connecting pipe. The multipoint gas monitoring device provided by the invention has the advantages that uninterrupted sampling detection is carried out on content of water and oxygen, harmful gases and cleanliness of ingredients of gases at different positions, measurement accuracy is high, size is small, and 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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