Low pressure gas automatic sampling device and use method

An automatic sampling and low-pressure gas technology, which is applied in the field of detectors, can solve problems such as the difficulty in realizing low-pressure gas automatic sampling, achieve the effects of compressing space occupation, saving power devices, and overcoming difficult sealing
CN101339172AInactive Publication Date: 2009-01-07PEKING UNIV
0 Cites 23 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PEKING UNIV
Publication Date
2009-01-07
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to an automatic sampling device of a low-pressure gas sample and a use method thereof; the device of the invention comprises a shell, the internal part of which is provided with an air path system and a circuit system, and is characterized in that: the air path system comprises a sample air path system and an air path system; wherein, the air path system supplies power to the reciprocating motion of an air cylinder in the sample air path system; the sample air path system comprises a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a first T-cock, a second T-cock, a cross fan, a vacuum pump, a pressure sensor, a sampling can and a compression component; the air path system comprises a first three-way electromagnetic valve, a second three-way electromagnetic valve and an air cylinder; the compression component of the sample air path system is connected with the air cylinder of the air path system by a piston connecting rod; the circuit system comprises a single-chip microprocessor control unit and is electrically connected with the sample air path system and the air path system. The device and the method of the invention can be widely used for automatic sampling of a gas chromatograph, preventing the environment from causing pollution to the measured gas sample effectively.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of detectors, in particular to a low-pressure gas automatic sampling device for detecting the front end of a sample inlet of an analysis instrument and a use method thereof. Background technique

[0002] Volatile organic compounds (VOCs) are one of the main components of atmospheric compound pollution, and have attracted much attention because they are closely related to human life. The sampling analysis method is usually used for qualitative and quantitative analysis of VOCs species in the atmosphere. The standard method of the US Environmental Protection Agency is often used at home and abroad, that is, to directly collect air samples on site with vacuum sampling tanks, send the sampled gas back to the laboratory, and use gas chromatograph GC and its combination technology for qualitative and quantitative analysis. However, for the samples of the same sampling steel tank, after analyzing VOCs, it is usual...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More