CN201163253Y - A preparation system for cigarette smoke aerosol detection sample gas - Google Patents

Abstract

The utility model discloses a sample gas preparation system for cigarette smoke aerosol detection, which comprises a cigarette smoke generating device, a three-way valve and a waste discharge device. The cigarette smoke generating device includes a negative pressure generator and an electromagnetic valve. The solenoid valve is connected to the three-way valve through the gas pipeline, one outlet of the three-way valve is connected to the waste discharge device through the gas pipeline, and the other outlet is connected to the solenoid valve and the aerosol detection instrument through the gas pipeline in sequence. The system adopts a suitable gas path design, and realizes the monitoring of the particle size distribution of the aerosol in the cigarette smoke by using the existing aerosol detector.

Description

A preparation system for cigarette smoke aerosol detection sample gas

technical field

The utility model belongs to the technical field of detection, in particular to a sample gas preparation system for cigarette smoke aerosol detection.

Background technique

Existing aerosol detection instruments are usually used to measure the particle size distribution and the quality of each particle size in aerosols in the air.

According to the ISO standard of the cigarette industry, the test sample gas flow rate requirement is 17.5±0.15mL/s. If this kind of sample air flow is used to directly use the existing aerosol detector gas to detect the particle size distribution of flue gas aerosol, it cannot meet the requirements of the aerosol detector for the sample flow; the concentration of aerosol in the flue gas is much higher than that in the air In the above situation, the detector will be seriously overloaded, and detection and analysis cannot be carried out.

After conducting experimental research on a large number of domestic and foreign cigarettes, the applicant found that using existing aerosol detection instruments to detect aerosols in smoke usually requires a flow rate of less than 1.75mL/s. That is to say, when the flue gas flow rate is less than 1.75mL/s, the existing aerosol detection instrument can measure the flue gas aerosol results more accurately. Based on this point, the applicant hopes to design a system that can utilize the sample airflow detected by the existing aerosol detector.

Utility model content

The purpose of the utility model is to fill up the gap in the prior art and provide a sample gas preparation system for cigarette smoke aerosol detection.

The technical scheme of the utility model is:

Provided is a sample gas preparation system for cigarette smoke aerosol detection, including a cigarette smoke generating device, a three-way valve, and a waste discharge device. The cigarette smoke generating device includes a smoking machine and a solenoid valve, and the solenoid valve communicates with the The three-way valves are connected, one outlet of the three-way valve is connected to the waste discharge device through the gas pipeline, and the other outlet is connected to the electromagnetic valve and the aerosol detection instrument in sequence through the gas pipeline.

The waste discharge device includes a restricting hole, a negative pressure generator or a vacuum peristaltic pump, a compressed air intake pipe and a solenoid valve, and the solenoid valve is opened for 5s and closed for 55s.

The cigarette smoke generating device includes a smoking machine and a solenoid valve. The burning cigarette simulates the smoking process through the negative pressure generator and the solenoid valve. The solenoid valve is set according to the cigarette detection requirements, and is usually opened for 2s and closed for 58s. until the cigarette is smoked. The flue gas flows out through the solenoid valve and flows into the three-way valve. The smoking machine can also be replaced by a cigarette holder.

The beneficial effects of the utility model are:

The utility model provides a sample air flow preparation system which can be detected by an existing aerosol detector, and provides a technical basis for tobacco production enterprises to effectively detect and control the aerosol content in the flue gas.

At the same time, the utility model has the advantages of simple structure, convenient use, low manufacturing cost, high popularization value and standardization prospect.

Description of drawings

Fig. 1 structural representation of the utility model

Detailed ways

Further illustrate the utility model below in conjunction with accompanying drawing and specific embodiment.

Example 1

With the structure shown in Figure 1, a system for preparing sample gas for cigarette smoke aerosol detection includes a cigarette smoke generating device, a three-way valve and a waste discharge device.

The cigarette smoke generating device includes a smoking machine and a solenoid valve 1. The burning cigarette passes through the smoking machine and the solenoid valve 1 to simulate the smoking process. The solenoid valve 1 is set according to the cigarette detection requirements, usually open for 2s (connected with the smoking machine for 2s) ), turn off for 58s, and repeat until the cigarette is completely smoked. The flue gas flows out through the solenoid valve 1 and flows into the three-way valve.

One outlet of the three-way valve is connected to the exhaust device through a gas pipeline. The exhaust device includes a flow-restricting hole, a negative pressure generator or a vacuum peristaltic pump, a compressed air inlet pipeline and a solenoid valve 3, and the flue gas flowing out of the three-way valve First, it flows through a flow-limiting hole, and then flows into a negative pressure generator or a vacuum peristaltic pump. The compressed air flows into the negative pressure generator through a solenoid valve 3, and is adjusted to enter the negative pressure generator by setting the solenoid valve 3 to be opened for 5s and closed for 55s. The flow rate of the compressed air, thereby adjusting the flow rate (flow rate) of the flue gas F2 entering the negative pressure generator, and finally adjusting the flow rate of the flue gas flow F1 flowing into the aerosol detector from the solenoid valve 2 to 1 ~ 1.75mL/s, negative The pressure generator is provided with an exhaust pipe.

Through the system of the utility model, the airflow of the cigarette sample that can be detected by using the existing aerosol detector to detect the particle size distribution of the smoke aerosol can be successfully prepared.

Claims (2)

1, a kind of preparation system of cigarette flue gas aerosol test sample gas, it is characterized in that comprising cigarette smoke generating means, T-valve and waste discharge device, described cigarette smoke generating means comprises smoking machine and solenoid valve, solenoid valve is connected with T-valve by gas pipeline, outlet of T-valve is connected with the waste discharge device by gas pipeline, and another outlet is connected with the gasoloid detecting instrument with solenoid valve successively by gas pipeline.

2,, it is characterized in that described waste discharge device comprises metering hole, negative pressure generator or vacuum peristaltic pump, compressed air inlet pipe road and solenoid valve according to the preparation system of the described cigarette flue gas aerosol test sample of claim 1 gas.

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