Flue gas concentration measuring device with size-changeable measuring cavity

Abstract

The utility model provides a flue gas concentration measuring device with replaceable measuring cavities. The flue gas concentration measuring device comprises a rack, a light source, a receiver, at least two measuring cavities with different capacities, a measuring cavity switching mechanism and a measuring cavity air passage sealing mechanism, the light source and the receiver are oppositely and fixedly arranged on the front side and the rear side of the rack, and a measuring cavity replacement station is formed between the light source and the receiver. The measuring cavity switching mechanism drives the measuring cavity to move horizontally in the direction perpendicular to the light path, and the measuring cavity is switched at the measuring cavity replacement station. The measuring cavity air passage sealing mechanism comprises two groups of vertical moving mechanisms and two sealing plugs which are arranged above and below the measuring cavity replacement station, the two sealing plugs are respectively provided with an air inlet and an air outlet, and the two groups of vertical moving mechanisms respectively drive the two sealing plugs to seal openings at the upper end and the lower end of the measuring cavity; when the sealing plug seals the measuring cavity, the air inlet and the air outlet are communicated with the inside of the measuring cavity. The device has the advantages that measuring cavities with different volumes can be replaced, and the replacement process is rapid and stable.

Description

Technical Field

[0001] The utility model relates to the technical field of tobacco measurement. Specifically, it relates to a flue gas concentration measurement device with a replaceable measurement cavity size. Background Art

[0002] In the experiment of measuring the concentration of each puff of flue gas, each puff of smoke is sucked into a container with a fixed cavity, and then its concentration is measured. Therefore, the size of the cavity volume actually has an impact on the measurement result because the cavity size will affect the diffusion and distribution of the smoke. Therefore, it is relatively important to test the influence of measurement cavities with different volumes on the detection result.

[0003] The optical measurement method mainly includes the transmission method and the scattering method. Among them, the transmission method is mainly convenient for transformation. In the optical path design of the transmission method, the measurement cavity is usually arranged between the light source and the receiver. When testing the influence of the cavity on the measurement of the smoke concentration, it is necessary to frequently replace the measurement cavity.

[0004] For the above reasons, how to design a measurement system with a replaceable measurement cavity and how to achieve the rapid replacement of the measurement cavity are new problems that need to be solved.

[0005] In order to solve the above existing problems, people have been seeking an ideal technical solution. Summary of the Utility Model

[0006] The purpose of the utility model is to aim at the deficiencies of the prior art, so as to provide a flue gas concentration measurement device with a replaceable measurement cavity size that can replace measurement cavities with different volumes and has a fast and stable replacement process.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is: a flue gas concentration measurement device with a replaceable measurement cavity size, which includes a frame, a light source, a receiver, at least two measurement cavities with different capacities, a measurement cavity switching mechanism, and a measurement cavity airway sealing mechanism;

[0008] The light source and the receiver are fixedly arranged on the front and rear sides of the frame relatively, and a measurement cavity replacement station is formed between the light source and the receiver;

[0009] The measurement cavity switching mechanism drives at least two measurement cavities to move horizontally along the direction perpendicular to the optical path, and switches to be connected with the light source and the receiver at the measurement cavity replacement station to form a test path;

[0010] The airtight mechanism of the measurement cavity airway includes two sets of vertical moving mechanisms and two sealing plugs arranged above and below the replacement station of the measurement cavity. An air inlet and an air outlet are respectively arranged on the two sealing plugs. The two sets of vertical moving mechanisms respectively drive the two sealing plugs to close the openings at the upper and lower ends of the measurement cavity. When the sealing plugs close the measurement cavity, the air inlet and the air outlet are communicated with the inside of the measurement cavity.

[0011] Based on the above, the measurement cavity includes a cavity body and viewing windows arranged on the front and rear opposite sides of the cavity body.

[0012] Based on the above, the front and rear dimensions, the top opening dimension, and the bottom opening dimension of each measurement cavity are the same, and the heights of each measurement cavity are different, so that the volumes of each measurement cavity are different.

[0013] Based on the above, the measurement cavity switching mechanism includes a horizontal track, a horizontal linear driving mechanism, a horizontal slider, and a measurement cavity mounting rack. Each measurement cavity is horizontally mounted on the measurement cavity mounting rack, and the horizontal linear driving mechanism drives the horizontal slider to slide on the horizontal track.

[0014] Based on the above, the horizontal linear driving mechanism is a linear motor, a linear slide table, or a lead screw driving mechanism.

[0015] Based on the above, the vertical moving mechanism is a linear motor, a linear slide table, or a lead screw driving mechanism.

[0016] Based on the above, a flexible light-shielding structure is adopted at the docking positions of the peripheries of the viewing windows of the measurement cavity with the light source and the receiver for dynamic light shielding.

[0017] Based on the above, both the light source and the receiver are installed on the bracket with adjustable heights.

[0018] The present utility model has substantial features and progress compared with the prior art. Specifically, the present utility model has the following advantages:

[0019] By designing measurement cavities with different capacities and adjusting the supporting measurement cavity switching mechanism and the airtight mechanism of the measurement cavity airway, a measurement path for the flue gas concentration is formed by the real-time cooperation of measurement cavities with different capacities with the same set of light source and receiver. Under the same suction conditions, measurement cavities with different capacities are switched within a short time to obtain the influence of different cavities on the detection of the smoke concentration, providing a data basis for the construction of the measurement system. Description of the Drawings

[0020] Figure 1 is the overall structural schematic diagram of the flue gas concentration measurement device with replaceable measurement cavity sizes in the present utility model.

[0021] Figure 2 is the structural schematic diagram of the measurement cavity switching mechanism in the present utility model.

[0022] Figure 3 This is a schematic structural view of the air duct sealing mechanism of the measurement chamber cooperating with the measurement chamber in the present utility model.

[0023] Figure 4 This is a schematic view of the air duct sealing mechanism of the measurement chamber in the present utility model.

[0024] Figure 5 This is a side view of the flue gas concentration measuring device with a replaceable measurement chamber size in the present utility model.

[0025] In the figure: 1. Frame; 2. Light source; 3. Receiver; 4. Measurement chamber; 5. Measurement chamber switching mechanism; 6. Air duct sealing mechanism of the measurement chamber; 41. Cavity; 42. Window; 51. Horizontal track; 52. Horizontal linear drive mechanism; 53. Horizontal slider; 54. Measurement chamber mounting bracket; 61. Vertical movement mechanism; 62. Sealing plug; 63. Air inlet; 64. Air outlet. Specific embodiments

[0026] Next, through specific embodiments, the technical solutions of the present utility model will be further described in detail.

[0027] As Figures 1 - 5 shown, a flue gas concentration measuring device with a replaceable measurement chamber size includes a frame 1, a light source 2, a receiver 3, at least two measurement chambers 4 with different capacities, a measurement chamber switching mechanism 5, and an air duct sealing mechanism 6 of the measurement chamber.

[0028] The light source 2 and the receiver 3 are fixedly arranged on the front and rear sides of the frame 1 relatively, a measurement chamber replacement station is formed between the light source 2 and the receiver 3, the position of the measurement chamber replacement station is fixed, and measurement chambers 4 with different capacities can be moved to this position to cooperate with the light source 2 and the receiver 3 to form a measurement optical path.

[0029] The measurement chamber switching mechanism 5 drives at least two measurement chambers 4 to move horizontally along a direction perpendicular to the optical path, and switches and connects with the light source 2 and the receiver 3 at the measurement chamber replacement station to form a test path.

[0030] The air duct sealing mechanism 6 of the measurement chamber includes two groups of vertical movement mechanisms 61 arranged above and below the measurement chamber replacement station and two sealing plugs 62. An air inlet 63 and an air outlet 64 are respectively arranged on the two sealing plugs 62. The two groups of vertical movement mechanisms 61 respectively drive the two sealing plugs 62 to close the upper and lower openings of the measurement chamber 4. When the sealing plugs 62 close the measurement chamber 4, the air inlet 63 and the air outlet 64 are communicated with the inside of the measurement chamber 4.

[0031] The measurement chamber 4 is designed to include a cavity 41 and windows 42 provided on the front and rear opposite sides of the cavity 41. The top and bottom ends of the cavity 41 are open openings. The front-to-back dimensions, top opening dimensions, and bottom opening dimensions of each measurement chamber 4 are the same, and the heights of the measurement chambers 4 are different, such that the volumes of the measurement chambers 4 are different.

[0032] Since the measurement chamber 4 is switched to match the light source 2 and the receiver 3, to prevent light from escaping from the connection, a flexible light-shielding structure is used for dynamic light shielding at the docking positions of the outer periphery of the window of the measurement chamber 4 with the light source 2 and the receiver 3, that is, when reaching the working station, the flexible light-shielding structures are squeezed against each other to achieve light shielding. The flexible light-shielding structure can be made of sponge or rubber with a relatively high degree of flexibility. Sealing means preventing light from escaping.

[0033] The measurement chamber switching mechanism 5 includes a horizontal rail 51, a horizontal linear drive mechanism 52, a horizontal slider 53, and a measurement chamber mounting frame 54. Each measurement chamber 4 is horizontally mounted on the measurement chamber mounting frame 54, and the horizontal linear drive mechanism 52 drives the horizontal slider 53 to slide on the horizontal rail 51.

[0034] In this embodiment, the horizontal linear drive mechanism 52 is a linear motor or a linear slide or a lead screw drive mechanism; the vertical movement mechanism 61 is a linear motor or a linear slide or a lead screw drive mechanism.

[0035] In other preferred embodiments, the light source and the receiver are both mounted on the bracket in a height-adjustable manner for fine adjustment.

[0036] Principle of operation description:

[0037] First, control the measurement chamber switching mechanism 5 to move one of the measurement chambers 4 to the measurement chamber replacement working station to dock with the light source 2 and the receiver 3 on the front and rear sides, and then control the measurement chamber air duct sealing mechanism 6 to seal the upper and lower air ports of the measurement chamber 4 from the upper and lower ends to achieve relative sealing of the measurement chamber 4.

[0038] The air inlet 63 and the air outlet 64 on the sealing plug 62 are respectively connected to the smoking device and the smoking machine. Start the smoking machine, start the light source and the receiver, and suck the smoke into the measurement chamber by suction for concentration detection;

[0039] Under the condition of setting other parameters such as the suction frequency, suction time, and light source parameters, control the measurement chamber switching mechanism 5 to replace another measurement chamber 4 with a different capacity, and then read the measurement parameters to observe whether the measurement values change after only the capacity changes and what the change rules are, so as to form some basic data for research use and provide a reference basis for the actual detection work of cigarettes in the future.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the specific implementation manners of the present invention or make equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A flue gas concentration measuring device with a replaceable cavity size measurement, characterized in that: It includes a frame, a light source, a receiver, at least two measuring chambers with different capacities, a measuring chamber switching mechanism, and a measuring chamber air duct sealing mechanism; The light source and the receiver are fixedly arranged on the front and rear sides of the frame relatively, and a measuring chamber replacement station is formed between the light source and the receiver; The measuring chamber switching mechanism drives at least two measuring chambers to move horizontally along a direction perpendicular to the optical path, and switches at the measuring chamber replacement station to form a test path connected to the light source and the receiver; The measuring chamber air duct sealing mechanism includes two groups of vertical moving mechanisms and two sealing plugs arranged above and below the measuring chamber replacement station. An air inlet and an air outlet are respectively arranged on the two sealing plugs. The two groups of vertical moving mechanisms respectively drive the two sealing plugs to close the upper and lower openings of the measuring chamber. When the sealing plugs close the measuring chamber, the air inlet and the air outlet are communicated with the inside of the measuring chamber.

2. The flue gas concentration measuring device with a replaceable measuring cavity size according to claim 1, characterized in that: The measuring chamber includes a cavity and windows arranged on the front and rear opposite sides of the cavity.

3. The flue gas concentration measuring device with a replaceable measuring cavity size according to claim 1 or 2, characterized in that: The front and rear dimensions, top opening dimensions, and bottom opening dimensions of each measuring chamber are the same, and the heights of each measuring chamber are different, so that the volumes of each measuring chamber are different.

4. The flue gas concentration measuring device with a replaceable measuring cavity size according to claim 3, wherein: The measuring chamber switching mechanism includes a horizontal track, a horizontal linear driving mechanism, a horizontal slider, and a measuring chamber mounting rack. Each measuring chamber is horizontally mounted on the measuring chamber mounting rack, and the horizontal linear driving mechanism drives the horizontal slider to slide on the horizontal track.

5. The flue gas concentration measuring device with a replaceable measuring cavity size according to claim 4, characterized in that: The horizontal linear driving mechanism is a linear motor or a linear slide or a lead screw driving mechanism.

6. The flue gas concentration measuring device with a replaceable measuring cavity size according to claim 3, characterized in that: The vertical moving mechanism is a linear motor or a linear slide or a lead screw driving mechanism.

7. The flue gas concentration measuring device with a replaceable measuring cavity size according to claim 5 or 6, characterized in that: The periphery of the window of the measuring chamber and the docking parts of the light source and the receiver are dynamically shaded by a flexible light-shielding structure.

8. The flue gas concentration measuring device with a replaceable measuring cavity size according to claim 7, characterized in that: Both the light source and the receiver are installed on the frame with adjustable heights.

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