Self-adaptive multi-size cigarette suction resistance ventilation rate measurement module

Abstract

The utility model provides a suction resistance ventilation rate measuring module with a self-adaptive multi-size cigarette, which comprises a measuring head main body, a latex film unit and a latex film opening and closing valve, and the inner diameter of a latex film in the latex film unit is smaller than the diameter of the cigarette with the minimum specification; the negative pressure ends of the latex film opening and closing valves are connected with a negative pressure control valve set, and the negative pressure control valve set is used for outputting different negative pressures and distributing the negative pressures to the latex film opening and closing valves so as to change the latex film wrapping force in the latex film units. The suction resistance and ventilation rate measurement module with the self-adaptive multi-size cigarettes has the advantages that the latex film can be universal, and the wrapping force can be adjusted.

Description

Technical Field

[0001] This utility model relates to the field of tobacco detection technology, specifically, to a module for measuring the suction resistance and ventilation rate of cigarettes with adaptive multi-size cigarettes. Background Technology

[0002] When testing cigarettes of different thicknesses, the cigarette filter rod testing station usually requires changing different test heads. The testing station typically needs to be equipped with three types of test heads: coarse, medium, and fine. The latex tubes in the test heads are also divided into three types: coarse, medium, and fine. At the same time, the wrapping force of the latex film relies entirely on the wrapping force of the latex film in its natural state to tightly wrap the cigarette being tested. Different types of latex films have different wrapping forces due to their shape, size, thickness, etc., which will affect the measurement of the cigarette's suction resistance and ventilation.

[0003] Specifically, in YCT446--2012 General Technical Conditions for Cigarette Suction Resistance and Filter Pressure Drop Testing Equipment, Section 4.4.2 stipulates that the inner diameter of the wrapping latex film should be 0.5-1.0 mm smaller than the cigarette to be tested. This provision is actually to ensure that the wrapping latex film can effectively seal the cigarette and that the wrapping force is not so great as to wrinkle the cigarette.

[0004] Therefore, in principle, the latex film used to wrap slim cigarettes can also ensure the airtightness of thick and medium cigarettes. However, due to its small pore size, there may be a problem of excessive wrapping force, which can also interfere with the ventilation rate of the internal structure of the cigarette filter rod.

[0005] For the reasons mentioned above, if we want to use a latex film of a certain size to clamp cigarette filter rods of various sizes, in addition to the issue of sealing, the main thing to consider is the issue of wrapping force.

[0006] Therefore, how to solve the problem of enveloping force has become an urgent technical issue.

[0007] In order to solve the above problems, people have been seeking an ideal technological solution. Utility Model Content

[0008] The purpose of this invention is to address the shortcomings of existing technologies by providing a measurement module for the suction resistance and ventilation rate of cigarettes with adaptive multi-size cigarettes, which enables the latex film to be universal and allows for adjustable wrapping force.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is: a suction resistance ventilation rate measurement module with adaptive multi-size cigarettes, including a test head body, a latex diaphragm unit and a latex diaphragm opening and closing valve, wherein the inner diameter of the latex diaphragm in the latex diaphragm unit is smaller than the diameter of the smallest size cigarette.

[0010] The negative pressure end of the latex membrane opening and closing valve is connected to a negative pressure control valve group. The negative pressure control valve group is used to output different negative pressures and distribute them to each latex membrane opening and closing valve to change the latex membrane wrapping force in the latex membrane unit.

[0011] Based on the above, the negative pressure end pipeline of the latex diaphragm valve is combined and then uniformly connected to the negative pressure control valve group.

[0012] Based on the above, the negative pressure control valve group includes a fourth two-position three-way valve and a fifth two-position three-way valve. The output side of the fourth two-position three-way valve is used to connect to each latex diaphragm opening and closing valve. The first input port of the fourth two-position three-way valve is connected to the first negative pressure source. The second input port of the fourth two-position three-way valve is connected to the output side of the fifth two-position three-way valve. The first input port of the fifth two-position three-way valve is connected to the second negative pressure source. The second input port of the fifth two-position three-way valve is connected to the third negative pressure source.

[0013] Based on the above, the number of latex diaphragm opening and closing valves is at least three.

[0014] Based on the above, the latex diaphragm valve is a two-position three-way valve.

[0015] Based on the above, the negative pressure of the first negative pressure source is -10 kPa to -30 kPa, preferably -20 kPa.

[0016] Based on the above, the negative pressure of the second negative pressure source is -30kPa to -60kPa, preferably -50kPa.

[0017] Based on the above, the negative pressure of the third negative pressure source is -60kPa to -84kPa, preferably -80kPa.

[0018] This utility model has substantial features and progress compared to the prior art. Specifically, this utility model has the following advantages:

[0019] This invention utilizes the basic structure of existing cigarette testing heads, replacing the latex film with the smallest possible size. This type of latex film can be directly adapted for use with slim cigarettes. When using thick and medium cigarettes, its small aperture structure ensures a tight seal. Furthermore, by using the existing latex film opening and closing valve in conjunction with a set of negative pressure control valves for outputting different negative pressures, the pressure at the latex film can be adjusted. This allows the sealing force of the latex film to be balanced while ensuring sufficient sealing, ultimately making this testing head suitable for use with cigarettes of various sizes, thus achieving versatility. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the suction resistance ventilation rate measurement module with adaptive multi-size cigarettes in this utility model.

[0021] Figure 2 This is a schematic diagram of the latex film unit in this utility model.

[0022] In the diagram: 1. Test head body; 2. Latex membrane unit; 3. Cigarette; 4. Latex membrane; 5. Latex membrane support; 6. Negative pressure hole. Detailed Implementation

[0023] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0024] like Figure 1 and Figure 2 As shown, a suction resistance ventilation rate measurement module with adaptive multi-size cigarettes includes a test head body 1, a latex diaphragm unit 2, and a latex diaphragm opening and closing valve. The inner diameter of the latex diaphragm in the latex diaphragm unit 2 is smaller than the diameter of the smallest size cigarette.

[0025] Taking a practical example, the latex film specifications usually correspond to three cigarette specifications, namely, thick cigarettes, medium cigarettes, and thin cigarettes. In this embodiment, the latex film units corresponding to thick and medium cigarettes are discarded, and only the latex film unit of thin cigarettes and the matching test head are used for unified adaptation.

[0026] The basic principle of the latex film unit for slim cigarettes is to use the small pores of the latex film to wrap around the outside of the slim cigarette, seal it, and then use it for testing. There are usually three of them, distributed as shown in the figure. They are mainly used to isolate the beginning and end, as well as the paper ventilation channel and the mouthpiece ventilation channel, so that they do not interfere with each other.

[0027] The latex film unit 2 typically includes a latex film support 5 and a detachable latex film 4. The latex film support 5 has a through hole in its center for lining the latex film. The latex film support has a negative pressure hole 6 on its side, which is connected to a latex film opening and closing valve. Through the negative pressure, the latex film is deformed, and the diameter is increased. The original function was to eliminate the wrapping force during the insertion and removal of the cigarette. After the diameter is increased, the cigarette is no longer constrained and can be easily removed. In this embodiment, the function of changing the force is added.

[0028] In this embodiment, the latex diaphragm valve is configured as three valves, each a two-position three-way valve, named First Two-Position Three-Way Valve, Second Two-Position Three-Way Valve, and Third Two-Position Three-Way Valve. (See attached...) Figure 1 The negative pressure end pipelines are MV1, MV2 and MV3 respectively. After being combined, they are connected to the negative pressure control valve group. In this embodiment, the negative pressure control valve group includes two two-position three-way valves, named the fourth two-position three-way valve and the fifth two-position three-way valve, as shown in the figure, MV4 and MV5 respectively. The negative pressure control valve group is used to output different negative pressures and distribute them to each latex membrane opening and closing valve to change the latex membrane wrapping force in the latex membrane unit.

[0029] Specifically, the output side of the fourth two-position three-way valve MV4 is used to connect to each latex diaphragm valve, the first input port of the fourth two-position three-way valve MV4 is connected to the first negative pressure source, the second input port of the fourth two-position three-way valve MV4 is connected to the output side of the fifth two-position three-way valve, the first input port of the fifth two-position three-way valve MV5 is connected to the second negative pressure source, and the second input port of the fifth two-position three-way valve MV5 is connected to the third negative pressure source.

[0030] Based on the commonly used thick, medium, and thin cigarettes in the industry, the negative pressure sources that need to be adapted can be designed as follows: the negative pressure of the first negative pressure source A is -10kPa to -30kPa, preferably -20kPa; the negative pressure of the second negative pressure source B is -30kPa to -60kPa, preferably -50kPa; and the negative pressure of the third negative pressure source C is -60kPa to -84kPa, preferably -80kPa.

[0031] In actual operation, the working principle is as follows:

[0032] First, assemble the test head and check whether each negative pressure source is starting normally.

[0033] The installation process is the same for all: close MV1, MV2 and MV3, close MV4 and open MV5. The negative pressure of the third negative pressure source C takes effect, which is the maximum negative pressure, and fully opens the latex film to facilitate the loading and unloading of cigarettes.

[0034] When testing the absorption resistance and ventilation rate of slim cigarettes, since the latex membrane is set according to the specifications of slim cigarettes and is consistent with the traditional design, the negative pressure source does not need to be connected and all valves are in the off state, so normal measurement of slim cigarettes can be carried out.

[0035] When testing the draw resistance and ventilation rate of the cigarette, MV4 and MV5 are normally open, and negative pressure A is connected. The negative pressure A is designed to be -20kPa, so that the encapsulation force of the latex film wrapping the cigarette is within a moderate range, and will not cause the cigarette to be over-wrapped, thus affecting the ventilation rate and draw resistance.

[0036] When testing the suction resistance and ventilation rate of coarse cigarettes, MV4 is normally open and MV5 is closed, and negative pressure B is activated. Negative pressure B is designed to be -50kPa, providing a slightly larger negative pressure to moderately reduce the wrapping force of the latex film in order to maintain the normal ventilation capacity of coarse cigarettes.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A suction resistance ventilation rate measurement module with adaptive multi-size cigarette holders, comprising a test head body, a latex diaphragm unit, and a latex diaphragm opening and closing valve, characterized in that: The inner diameter of the latex film in each latex film unit is smaller than the diameter of the smallest cigarette stick. The negative pressure end of the latex membrane opening and closing valve is connected to a negative pressure control valve group. The negative pressure control valve group is used to output different negative pressures and distribute them to each latex membrane opening and closing valve to change the latex membrane wrapping force in the latex membrane unit.

2. The draw resistance ventilation rate measurement module with self- adaptation to multiple cigarette sizes of claim 1, wherein: The negative pressure end pipelines of the latex diaphragm valves are combined and then uniformly connected to the negative pressure control valve group.

3. The draw resistance ventilation rate measurement module with self- adaptation to multiple cigarette sizes of claim 1 or 2, wherein: The negative pressure control valve group includes a fourth two-position three-way valve and a fifth two-position three-way valve. The output side of the fourth two-position three-way valve is used to connect to each latex diaphragm opening and closing valve. The first input port of the fourth two-position three-way valve is connected to the first negative pressure source. The second input port of the fourth two-position three-way valve is connected to the output side of the fifth two-position three-way valve. The first input port of the fifth two-position three-way valve is connected to the second negative pressure source. The second input port of the fifth two-position three-way valve is connected to the third negative pressure source.

4. The draw resistance ventilation rate measurement module with self- adaptation to multiple cigarette sizes of claim 3, wherein: The number of latex diaphragm opening and closing valves is at least three.

5. The draw resistance ventilation rate measurement module with self- adaptation to multiple cigarette sizes of claim 4, wherein: The latex diaphragm valve is a two-position three-way valve.

6. The draw resistance ventilation rate measurement module with self- adaptation to multiple cigarette sizes of claim 3 or 4 or 5, wherein: The negative pressure of the first negative pressure source is -10 kPa to -30 kPa.

7. The draw resistance ventilation rate measurement module with self- adaptation to multiple cigarette sizes of claim 3 or 4 or 5, wherein: The negative pressure of the second negative pressure source is -30kPa to -60kPa.

8. The draw resistance ventilation rate measurement module with self- adaptation to multiple cigarette sizes of claim 3 or 4 or 5, wherein: The negative pressure of the third negative pressure source is -60 kPa to -84 kPa.

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