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A gas sampling device

A gas sampling and sealing cylinder technology, applied in sampling devices, measuring devices, sampling, etc., can solve the problems of easy loss of sealed bags, inconvenient users, unreliable sealing performance, etc.

Active Publication Date: 2020-09-01
CHONGQING YIJU DOOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, after the pharmaceutical cage of the above-mentioned semi-passive air sampler is filled with granular adsorbent, the granular adsorbent is exposed to the air. In order to prevent the granular adsorbent from contacting the air before sampling, it is necessary to install the semi-passive air sampler. In the sealed bag, because the sealed bag is in a sealed state by tightening the mouth of the bag, its sealing performance is not reliable; in addition, because the sealed bag and the semi-passive air sampler are not integrated, the sealed bag is easy to lose, will cause inconvenience to users

Method used

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  • A gas sampling device
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Experimental program
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Embodiment 1

[0032] Such as figure 1 , figure 2As shown, the gas sampling device includes a base 10, a wind cylinder 20 fixed on the base 10, and a sealing cylinder 30. The base 10 in the first embodiment is made of metal. The air cylinder 20 is sleeved on the outer periphery of the sealing cylinder 30 , so that an air passage 22 is formed between the air cylinder 20 and the sealing cylinder 30 , and the lower part of the air cylinder 20 is provided with an air inlet 21 communicating with the air passage 22 . A material storage cylinder 40 is slidably connected in the sealing cylinder 30 , and the material storage cylinder 40 can slide up and down vertically on the upper part of the sealing cylinder 30 . A piston 41 is slidably connected in the storage tube 40, the top of the storage tube 40 is open, and the opening is closed by a cover threaded with the storage tube 40; the storage tube 40 is used to store the granular adsorbent, and the present embodiment The granular adsorbent in the...

Embodiment 2

[0041] Such as image 3 As shown, the difference between the second embodiment and the first embodiment is: in the second embodiment, the air guide mechanism is a heater, and the heater includes a resistance wire 63 arranged in the air duct 22, and the resistance wire 63 is supported by a copper sheet 62, And the copper sheet 62 protrudes from the base 10 , so that the resistance wire 63 can be communicated with the power supply through the copper sheet 62 . In addition, because the copper sheet 62 passes through the base body, the base body in this embodiment is made of ceramics. The heating of the resistance wire 63 will heat the air in the air duct 22, and the hot air will be continuously discharged from the upper part of the air duct 22, while the cold air will enter the air duct 22 through the air inlet 21 at the bottom of the air duct 20, so that the external air is constantly being drawn into the air duct 22. Suction in the air duct 22.

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Abstract

The present invention relates to a gas sampling apparatus, and specifically discloses a gas sampling apparatus, which comprises a base, a wind cylinder and a sealing cylinder, wherein the wind cylinder and the sealing cylinder are fixed on the base, a wind duct is formed between the wind cylinder and the sealing cylinder, a gas inlet hole is arranged on the lower portion of the wind cylinder, a material storage cylinder is slidably connected in the sealing cylinder, the lower portion of the sealing cylinder comprises an inlet section, a throat channel and a diffusion section, a wind dischargehole communicated to the diffusion section is arranged on the base, a piston capable of sliding in the material storage cylinder is arranged in the material storage cylinder, and is fixedly connectedto a pushing rod, the bottom portion of the material storage cylinder is detachably connected to an agent cage capable of passing through the throat channel, the material storage cylinder and the agent cage are communicated through a one-way valve, the side wall of the agent cage is made of an iron wire mesh, the bottom portion of the agent cage is provided with a sealing plate matched with the throat channel, the side wall of the throat channel is provided with a suction hole for communicating the throat channel and the wind duct, and a wind guide mechanism for making the gas flow pass through the wind duct in an accelerated manner. According to the present invention, after the gas sampling apparatus completes the air sampling, the closed space is formed between the bottom portion of thestorage cylinder and the sealing plate so as to avoid the pollution on the collected sample.

Description

technical field [0001] The invention relates to a gas sampling device, in particular to a gas sampling device. Background technique [0002] VOC refers to various organic compounds with a boiling point of 50-260°C under normal pressure, mainly including: benzene, toluene, xylene, ethylbenzene, styrene, etc. [0003] The air sampler is a kind of auxiliary instrument, which can collect or extract the measured volatile organic compounds (VOC) in the detected ambient air, and can detect the VOC concentration in the detected ambient air when used in conjunction with a gas chromatograph and other instruments . Air containers such as sampling bags, sampling air bags, etc. are not included. [0004] Because building materials, decoration materials, furniture, and home appliances use a large amount of materials containing VOC and formaldehyde during production, they will gradually be released during subsequent use to pollute the indoor air environment. At present, the detection me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/24
CPCG01N1/2273
Inventor 黄昭和
Owner CHONGQING YIJU DOOR