Liquid level volatile gas detection device for water body with frequently-changed water level

Abstract

The invention discloses a liquid level volatile gas detection device for a water body with the frequently-changed water level. The liquid level volatile gas detection device comprises floating plates and gas collection chambers with the open lower portions, a collection chamber sealing cover is arranged on the upper portions of the gas collection chambers in a matched mode, a lifting support comprises a base, a lifting arm, a lifting rope and a lifting motor, and a liquid level height sensing device is arranged in each floating plate and comprises a liquid level sensor, a wireless signal transceiver and a battery; the liquid level volatile gas detection device further comprises two symmetrically-arranged site clearing structures, a site clearing motor device and an intelligent control device, the intelligent control device comprises a controller, and the controller is connected with the lifting motor and a regulating motor separately and controls operation of the lifting motor and the regulating motor. The liquid level volatilization gas detection device has the advantages that the internal pressure and the external pressure of the gas collection chambers are balanced, the detection precision is high, the detected water surface can be cleaned, the intelligence degree is high, the water surface height can be detected, and all-weather continuous automatic detection can be achieved.

Description

technical field [0001] The invention belongs to the technical field of gas sampling devices, and in particular relates to a liquid surface volatile gas detection device suitable for water bodies with frequent water level changes. Background technique [0002] At present, the in-situ sampling method for volatile gases in sewage is mainly the closed air chamber method. That is, a closed container with a certain unit area is covered on the surface of the sewage to be tested to keep the water surface sealed, and the volatilization of the gas to be detected on the surface of the sewage in the closed container is measured within a unit of time. Due to the closed air chamber structure sampling, the gas in the airtight chamber needs to be pumped into the detection device for detection, resulting in a decrease in the air pressure in the airtight chamber, changing the surface environment of the water body to be tested, and affecting the accuracy of the detection results. Secondly, th...

AI Technical Summary

Problems solved by technology

Due to the sampling of the closed air chamber structure, the gas in the airtight air chamber needs to be pumped out to the detection device for detection, resulting in a decrease in the air pressure in the airtight air chamber, changing the surface environment of the water body to be tested, and affecting the accuracy of the test results.

Secondly, the existing closed air chamber structure has a low degree of intelligence, requires manual guarding, and has a low degree of freedom

In addition, the existing airtight chamber method is to prepare an airtight container in advance and directly cover it on the water surface of the sewage to be tested, and there is no vent hole at the upper end of the airtight container, so that the air in the container cannot be discharged from the airtight container, and the airtight container is placed on the water surface At the moment, the gas composition in the container is very different from the gas composition on the water surface, which causes a large deviation between the detected initial value and the actual value, reducing the accuracy of the measurement

When there are miscellaneous aquatic plants on the water surface, it is difficult for the airtight air chamber structure to completely cover the water surface, resulting in sampling failure

[0003] For water bodies with unstable liquid levels, such as urinals in livestock and poultry farming, whenever a new stream of sewage is discharged into the urinal, the water level will rise accordingly, and every time a stream of sewage is discharged, the water level will decrease accordingly. For such a water body whose water level changes frequently, the automation device that controls the displacement in a fixed amount of time will have a height deviation when placing the airtight container, which may cause the airtight container to be suspended in the air without being placed on the water surface, or the airtight container may be lowered too much. Too much, causing the suspension rope of the automation device to be contaminated by sewage

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