A device for on-line determination of stem content in tobacco shred in a primary tobacco shred air classifier

Abstract

The utility model discloses a kind of online determination devices of stem signature content in cut tobacco of primary tobacco leaf air separator, rack is equipped with air separation separator and cyclone separator;The feed inlet of air separation separator is connected with the stem filament mixture discharge port of primary tobacco leaf air separator through conveyor, and the discharge port below the bottom of air separation separator is equipped with tobacco stem storage weighing hopper, and the tobacco stem storage weighing hopper is supported and weighed by first weighing sensor;The feed inlet of cyclone separator is connected with the top air outlet of air separation separator through connecting pipeline, and the air outlet of centrifugal fan of cyclone separator is sealed butt joint with the feed inlet of air separation separator through air return pipeline, and the discharge port of the bottom of cyclone separator is connected with unloader, and the discharge port below the bottom of unloader is equipped with cut tobacco storage weighing hopper, and the cut tobacco storage weighing hopper is supported and weighed by second weighing sensor.The utility model has the advantages that the stem filament mixture of primary tobacco leaf air separator is separated and weighed in real time online.

Description

Technical Field

[0001] This utility model relates to the technical field of cigarette processing equipment, and in particular to an online device for determining the stem content in tobacco shreds of a primary leaf shred air separator. Background Technology

[0002] In tobacco processing, the primary leaf shred air separator is one of the key pieces of equipment. Its main function is to separate the stems from the tobacco shreds using the weight difference between the shredded tobacco and the stems through air separation, thereby improving the purity and processing quality of the tobacco. The stems removed by the primary leaf shred air separator are mixed with tobacco shreds, forming a stem-shred mixture, which exits from the stem-shred mixture outlet of the primary leaf shred air separator. The stem content in the stem-shred mixture removed by the primary leaf shred air separator is a core indicator of the air separation effect. An excessively high stem content will seriously affect the combustibility, flavor, and appearance quality of cigarettes; therefore, accurate detection of the stem content in the stem-shred mixture is necessary.

[0003] Currently, the tobacco industry primarily uses offline testing to detect the stem content in the stem mixture removed by the primary leaf air separator. This involves operators periodically taking samples manually from the stem mixture outlet of the primary leaf air separator, then bringing the samples back to the laboratory for manual sieving and weighing to calculate the stem content. This method has several significant drawbacks: First, it is highly delayed, as there is a time lag between sampling and obtaining results. By the time the results show excessive stem content, a large amount of substandard tobacco has already been produced. Second, it lacks representativeness, as manual sampling is intermittent and cannot reflect real-time fluctuations in stem content, easily leading to significant discrepancies between test results and actual production conditions. Third, it is labor-intensive, as manual sampling, sieving, and weighing require substantial manpower and are inefficient. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an online measuring device for the content of stems in tobacco shreds of a primary leaf shred air separator. This device enables real-time online separation and measurement of the stem mixture removed by the primary leaf shred air separator, allowing for more accurate and timely adjustment of equipment process parameters, while also reducing labor intensity and improving detection efficiency.

[0005] This utility model is achieved through the following technical solution: An online determination device for the stem content in tobacco shreds of a primary leaf shred air separator includes a frame, on which an air separator and a cyclone separator are installed. A conveyor is installed outside the feed inlet on one side of the air classifier. The feed inlet of the conveyor is connected to the discharge outlet of the stem mixture of the first-stage leaf air classifier. The discharge outlet of the conveyor is sealed and connected to the feed inlet of the air classifier. A tobacco stem storage weighing hopper is installed below the discharge outlet at the bottom of the air classifier. The tobacco stem storage weighing hopper is supported and weighed by a first weighing sensor installed on the frame. The feed inlet of the cyclone separator is connected to the air outlet at the top of the air classifier via a connecting pipe. The air outlet of the centrifugal fan of the cyclone separator is sealed and connected to the feed inlet of the air classifier via a return air pipe. The discharge outlet at the bottom of the cyclone separator is connected to a discharge device. Below the discharge outlet at the bottom of the discharge device is a tobacco shred storage weighing hopper. The tobacco shred storage weighing hopper is supported and weighed by a second weighing sensor installed on the frame.

[0006] As a preferred embodiment of the above-mentioned online determination device for the content of stems in tobacco shreds in a primary leaf shred air separator, the air separator is a baffle-type air separator with an internal zigzag flow channel, and the feed inlet of the baffle-type air separator is located on the rear side of the baffle-type air separator near the top.

[0007] As a preferred embodiment of the above-mentioned online determination device for the content of stems in tobacco shreds in a primary leaf shred air separator, the conveyor is a screw conveyor, which is located behind the baffle-type air separator, and the conveying channel of the screw conveyor is inclined with the front higher than the back.

[0008] As a preferred embodiment of the above-mentioned online determination device for the content of stems in tobacco shreds in a primary leaf shred air separator, both the tobacco shred storage weighing hopper and the tobacco stem storage weighing hopper are funnel-shaped. A tobacco shred storage support ring and a tobacco stem storage weighing support ring are respectively fixed around the conical section of the tobacco shred storage weighing hopper and the tobacco stem storage weighing support ring. The tobacco stem storage weighing support ring is supported by two first weighing sensors set on the frame, and the tobacco shred storage support ring is supported by two second weighing sensors set on the frame.

[0009] As a preferred embodiment of the above-mentioned online determination device for the content of stems in tobacco shreds in a primary leaf shred air separator, the bottom discharge ports of the tobacco shreds storage weighing hopper and the tobacco stems storage weighing hopper are respectively equipped with slide valves.

[0010] As a preferred embodiment of the above-mentioned online determination device for the content of stems in tobacco shreds in a primary leaf shred air separator, the air separator and the cyclone separator are arranged side by side on the frame.

[0011] As a preferred embodiment of the above-mentioned online determination device for the content of stems in tobacco shreds in a primary leaf air separator, the unloader is a star-shaped unloader, which is installed on the frame.

[0012] This invention has the following advantages over the prior art: This invention provides an online device for determining the stem content in tobacco shreds from a primary leaf shred air separator. By incorporating an air separator and a cyclone separator, and connecting the air separator inlet to the stem-shred mixture outlet of the primary leaf shred air separator via a conveyor, it achieves online separation of tobacco stems and shreds from the stem-shred mixture removed by the primary leaf shred air separator. Separate weighing hoppers for tobacco stems and shreds, along with corresponding weighing sensors, enable online weighing of the separated tobacco stems and shreds, achieving real-time online determination of the stem content. This solves the lag problem of traditional offline detection methods, providing a reliable basis for timely adjustment of the primary leaf shred air separator parameters and effectively improving the stability of tobacco processing quality. Furthermore, this invention features a compact structure, convenient use and maintenance, eliminates the need for manual offline detection, reduces labor intensity, and improves detection efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the internal structure of the baffle-type air separator of this utility model.

[0015] Figure 3 This is a schematic diagram of the cyclone separator part of this utility model.

[0016] Figure 4 This is a schematic diagram of the installation structure of the two material storage weighing hoppers and the corresponding weighing sensors of this utility model.

[0017] Figure 5 This is a schematic diagram of the bottom slide valve of the two material weighing hoppers of this utility model.

[0018] Labels in the diagram: 1. Frame; 2. Cyclone separator; 3. Tobacco stem storage weighing hopper; 4. First weighing sensor; 5. Bending flow channel; 6. Bending flow air separator; 7. Screw conveyor; 8. Connecting pipe; 9. Centrifugal fan; 10. Return air duct; 11. Rotary rotary valve; 12. Tobacco shred storage weighing hopper; 13. Second weighing sensor; 14. Tobacco shred storage support ring; 15. Tobacco stem storage weighing support ring; 16. Manual slide gate valve. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. These embodiments are implemented based on the technical solution of this utility model and provide detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the following embodiments.

[0020] See Figures 1 to 5This embodiment provides an online device for determining the stem content in tobacco shreds in a primary leaf shred air separator, including a frame 1, on which an air separator and a cyclone separator 2 are installed, arranged side by side on the frame 1.

[0021] A conveyor is provided outside the feed inlet on one side of the air classifier. The feed inlet of the conveyor is connected to the discharge outlet of the stem mixture of the first-stage leaf air classifier. The discharge outlet of the conveyor is sealed and connected to the feed inlet of the air classifier. A tobacco stem storage weighing hopper 3 is provided below the discharge outlet at the bottom of the air classifier. The tobacco stem storage weighing hopper 3 is supported and weighed by the first weighing sensor 4 set on the frame 1.

[0022] In this embodiment, the air separator is a baffle-type air separator 6 with an internally designed zigzag flow channel 5. The zigzag flow channel 5 extends the material throughput time, improving sorting efficiency. The bottom of the baffle-type air separator 6 is mounted on the frame 1 via a flange connection. The feed inlet of the baffle-type air separator 6 is located on the rear side near the top of the baffle-type air separator 6. The conveyor is a screw conveyor 7, located behind the baffle-type air separator 6. The conveying channel of the screw conveyor 7 is inclined at the front and lower at the rear. The feed inlet of the screw conveyor 7 and the outlet of the stem-fiber mixture of the first-stage blade air separator, as well as the outlet of the screw conveyor 7 and the feed inlet of the baffle-type air separator 6, can be connected via flanges.

[0023] The inlet of the cyclone separator 2 is connected to the top outlet of the air classifier via a connecting pipe 8. The outlet of the centrifugal fan 9 of the cyclone separator 2 is sealed to the inlet of the air classifier via a return air pipe 10. The return air pipe 10 provides the airflow required for the baffle-type air classifier 6 and facilitates the separation and conveying of tobacco shreds. A discharge device is connected to the bottom outlet of the cyclone separator 2. The discharge device is a star-shaped discharge device 11. The top of the star-shaped discharge device 11 is connected to the bottom outlet of the cyclone separator 2 via a flange connection, and the bottom of the star-shaped discharge device 11 is mounted on the frame 1 via a flange connection. A tobacco shred storage weighing hopper 12 is located below the bottom outlet of the discharge device. The tobacco shred storage weighing hopper 12 is supported and weighed by a second weighing sensor 13 mounted on the frame 1.

[0024] In this embodiment, both the tobacco shreds weighing hopper 12 and the tobacco stem weighing hopper 3 are funnel-shaped. A tobacco shreds support ring 14 and a tobacco stem weighing support ring 15 are fixed to the periphery of the conical sections of the tobacco shreds weighing hopper 12 and the tobacco stem weighing hopper 3, respectively. The tobacco stem weighing support ring 15 is supported by two first weighing sensors 4 mounted on the frame 1, and the tobacco shreds support ring 14 is supported by two second weighing sensors 13 mounted on the frame 1. The bottom outlets of the tobacco shreds weighing hopper 12 and the tobacco stem weighing hopper 3 are respectively equipped with slide valves, which can be manual slide valves 16, for unloading materials from the tobacco shreds weighing hopper 12 and the tobacco stem weighing hopper 3.

[0025] During operation, the stem and shred mixture rejected by the primary leaf air separator exits from the stem and shred mixture outlet and is conveyed from back to front by the screw conveyor 7. Driven by the process gas in the return air duct 10, the stem and shred mixture at the inlet of the baffle-type air separator 6 is conveyed forward into the zigzag channel 5 of the baffle-type air separator 6. In the zigzag channel 5, the tobacco stems and shreds are separated. The heavier tobacco stems fall into the tobacco stem weighing hopper 3 below, while the lighter shreds enter the cyclone separator 2 through the connecting pipe 8. The cyclone separator 2 uses the principle of centrifugal force and inertial separation to separate the shreds and air. The shreds fall from below the cyclone separator 2 through the star-shaped unloader 11 into the shredded tobacco weighing hopper 12, while the air rises into the return air duct 10 for recycling. Weighing sensors installed below the tobacco stem weighing hopper 3 and the tobacco shred weighing hopper 12 can collect the weight of tobacco stems and shreds in real time, thereby calculating the current stem content and providing a basis for timely adjustment of the parameters of the primary leaf and shred air separator.

[0026] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An online device for determining the stem content in tobacco shreds of a primary leaf shred air separator, characterized in that: Includes a frame (1), on which an air separator and a cyclone separator (2) are installed; A conveyor is provided outside the feed inlet on one side of the air separator. The feed inlet of the conveyor is connected to the discharge outlet of the stem mixture of the first-stage leaf air separator. The discharge outlet of the conveyor is sealed and connected to the feed inlet of the air separator. A tobacco stem storage weighing hopper (3) is provided below the discharge outlet at the bottom of the air separator. The tobacco stem storage weighing hopper (3) is supported and weighed by the first weighing sensor (4) set on the frame (1). The feed inlet of the cyclone separator (2) is connected to the top air outlet of the air classifier via the connecting pipe (8). The air outlet of the centrifugal fan (9) of the cyclone separator (2) is sealed and connected to the feed inlet of the air classifier via the return air pipe (10). The discharge port at the bottom of the cyclone separator (2) is connected to a discharge device. Below the discharge port at the bottom of the discharge device, there is a tobacco storage weighing hopper (12). The tobacco storage weighing hopper (12) is supported and weighed by the second weighing sensor (13) set on the frame (1).

2. The online device for determining the stem content in tobacco shreds of a primary leaf shred air separator as described in claim 1, characterized in that: The air classifier is a baffle-type air classifier (6) with a built-in zigzag flow channel (5). The feed inlet of the baffle-type air classifier (6) is located on the rear side of the baffle-type air classifier (6) near the top.

3. The online device for determining the stem content in tobacco shreds of a primary leaf shred air separator as described in claim 2, characterized in that: The conveyor is a screw conveyor (7), which is located behind the baffle-type air separator (6), and the conveying channel of the screw conveyor (7) is inclined with the front higher than the back.

4. The online device for determining the stem content in tobacco shreds of a primary leaf shred air separator as described in claim 1, characterized in that: The tobacco shreds storage weighing hopper (12) and the tobacco stems storage weighing hopper (3) are both funnel-shaped. Tobacco shreds storage support ring (14) and tobacco stems storage support ring (15) are fixed on the outer periphery of the conical section of the tobacco shreds storage weighing hopper (12) and the tobacco stems storage weighing hopper (3), respectively. The tobacco stems storage support ring (15) is supported by two first weighing sensors (4) set on the frame (1), and the tobacco shreds storage support ring (14) is supported by two second weighing sensors (13) set on the frame (1).

5. The online device for determining the stem content in tobacco shreds of a primary leaf shred air separator as described in claim 4, characterized in that: The bottom outlets of the tobacco shreds weighing hopper (12) and the tobacco stem weighing hopper (3) are respectively equipped with slide valves.

6. The online device for determining the stem content in tobacco shreds of a primary leaf shred air separator as described in claim 1, characterized in that: The air separator and the cyclone separator (2) are arranged side by side on the frame (1).

7. The online device for determining the stem content in tobacco shreds of a primary leaf shred air separator as described in claim 1, characterized in that: The unloader is a star-shaped unloader (11), which is mounted on the frame (1).

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