Sealed storage and transportation device for replacement type positive-pressure sampling tube

Abstract

The invention discloses a sealed storage and transportation device for a replacement type positive-pressure sampling tube. The sealed storage and transportation device comprises a barrel and a sealingcover, and is characterized in that a baffle is arranged in the barrel and divides the barrel into two independent chambers, namely a storage chamber and a gas chamber; the sealing cover covers the barrel; and a first one-way valve for filling compressed gas is arranged at the bottom of the barrel. According to the device, clean compressed air is filled in advance, and air in a space for storingthe sampling tube is completely replaced by the clean compressed air during use, so that the space for storing the sampling tube cannot cause any pollution to the sampling tube; and moreover, the space for storing the sampling tube can be in a positive-pressure state, and external air can be prevented from entering the space even if leakage exists, so that data are completely accurate, operation errors in a process are completely avoided, and the device has substantial significance for the air detection industry.

Description

technical field [0001] The invention relates to the field of detection equipment, in particular to a replacement positive pressure sampling tube sealing storage device. Background technique [0002] The sampling tube refers to a tool for quickly measuring the concentration of harmful gases in the air. Among them, the more commonly used one for environmental testing is the activated carbon adsorption tube, which is composed of a metal (usually stainless steel) or glass tube. The tube is filled with adsorption material (such as graphitized carbon black), and the two ends are covered by rubber caps; when in use, remove the rubber caps at both ends to absorb the air in the field, and then seal it with the rubber cap and bring it back to the experiment Laboratory testing to determine the air content of the site. [0003] However, the rubber caps at both ends of the metal or glass tubes are very poorly sealed. When bringing them back to the laboratory from the field, they are pac...

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Problems solved by technology

[0003] However, the rubber caps at both ends of the metal or glass tubes are very poorly sealed. When bringing them back to the laboratory from the field, they are packed into a storage box or plastic bag to bring them back. During this process, due to the poor seal of the rubber caps at both ends of the sampling tube, the outside air can easily enter the sampling tube again, causing pollution to the sampling tube after the sample has been collected; the polluted sampling tube will seriously affect the quality of the sampling tube. Accuracy of data; for example, there is no problem with the air quality at the site, but because the outside air will enter the sampling tube during transportation, the directly adsorbed material components in the sampling tube will increase, and the final test result is the result of the on-site The result of the adsorbed substances plus the composition of the air substances during road transportation is quite different from the facts. Therefore, it is quite necessary to seal the sampling tube after collecting the samples.

[0004] Although there are storage boxes that are sealed and stored, there is a problem of leakage after all. As long as the outside air enters the storage box, it will pollute the sampling tubes, and most of the time, even after the collected sampling tubes have been transported to the laboratory, due to The construction period, equipment occupancy, etc., can not be tested immediately. It can only be stored at low temperature first. Under low temperature conditions, the thermal expansion of different materials is different, and the leakage problem is more obvious. Therefore, the current result is that even if the transportation process It can ensure that the contamination of the sampling tube is very small, but the leakage problem during refrigeration cannot be solved

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