Gas sampling device

Abstract

The invention discloses a gas sampling device, which is characterized in that the gas sampling device comprises a gas sampling probe, a gas sampling bottle and a guiding device, wherein a motionless guide front end of the guiding device is connected with the gas sampling probe, and a cavity, of which the diameter conforms to that of the gas sampling bottle, is arranged in the movable guide; the front end of the movable guide is inserted into the back end of the motionless guide, and a guide pressure spring seat is arranged outside the motionless guide; the movable guide is connected with the guide pressure spring seat with screws through a long groove arranged in the motionless guide; the guide pressure spring is sleeved on the guide pressure spring seat; and the sampling probe is provided with a zero-gas inlet and outlet port; and a probe head is provided with a side hole. The invention has the advantages of simple and convenient installation, convenient operation and scientific sampling method. The sampling probe is provided with the zero-gas inlet and outlet port, so that the pressure in the bottle is kept unchanged in the sampling process. The front end of the sampling probe is sharp, thereby providing convenience for piercing to sample. The side hole at the probe end can prevent the rubber plug from blocking. The invention does not use an actuating mechanism to realize low carbon and environmental protection and is applicable to different detecting instruments to have the advantage of favorable compatibility.

Description

technical field [0001] The invention relates to a device for gas sampling, in particular to a gas sampling device for breath test samples used in medical diagnosis of diseases. Background technique [0002] At present, the breath test sample collection devices suitable for medically diagnosing diseases mostly use gas sampling bags and some automatic sampling devices, but these gas sampling bags and automatic gas sampling devices have the following problems: [0003] Disadvantages of the gas sampling bag: the sample gas collected by the gas sampling bag is a mixture of air and sample gas in the bag, and the purity of the sample gas is affected by the air content; when the gas sampling bag is connected to the gas circuit, the gas sampling bag must be removed first. The sealing cap is inconvenient to operate; when sampling, the sample gas is taken from the entrance of the sampling bag; when using the gas sampling bag to collect sample gas, the mouth of the air bag must be disin...

AI Technical Summary

Problems solved by technology

[0003] Disadvantages of the gas sampling bag: the sample gas collected by the gas sampling bag is a mixture of air and sample gas in the bag, and the purity of the sample gas is affected by the air content; when the gas sampling bag is connected to the gas circuit, the gas sampling bag must be removed first. The sealing cap is inconvenient to operate; when sampling, the sample gas is taken from the inlet of the sampling bag; when using the gas sampling bag to collect sample gas, the mouth of the air bag must be disinfected, which is troublesome

[0004] Disadvantages of gas sampling automatic device: high manufacturing cost and large volume; high degree of automation, suitable for large-scale testing and sampling, not suitable for on-the-go testing; automatic actuators are required, and the power consumption is large; usually integrated with testing instruments, no compatibility

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