A dual-fluid airflow separation tobacco stem leaf content detection device and detection method

Abstract

A dual-fluid airflow separation type tobacco stem leaf content detection device and detection method, the device comprises a frame, a dual-fluid airflow separation unit installed on the frame, and a rolling grinding unit and a weighing unit respectively corresponding to the inlet and outlet positions of the dual-fluid airflow separation unit; the dual-fluid airflow separation unit comprises a main airflow duct, an auxiliary airflow duct, and a fluidized separation chamber; the rolling grinding unit comprises a grinding belt, a grinding belt support plate, and a grinding plate, the upper surface of the grinding belt is processed with a grinding groove, and the grinding plate is arranged above the grinding belt and between the upper surface of the grinding belt to form a rubbing channel; the weighing unit is arranged below the dual-fluid airflow separation unit. The beneficial effects of the present invention are: the amount of leaves remaining on the tobacco stems can be determined by the cooperation of the rolling grinding unit, the dual-fluid airflow separation unit and the weighing unit, eliminating the tedious processes of manual stem and leaf separation, weighing calculation, etc., and it is convenient and quick to use, which greatly improves work efficiency.

Description

Technical Field

[0001] The invention relates to a double-fluid airflow separation type tobacco stem leaf content rate detection device and a detection method. Background Art

[0002] During the tobacco leaf processing, it is necessary to separate the tobacco stems from the tobacco leaves. However, due to the influence of equipment, environment and the material properties of the tobacco leaves themselves, a small amount of tobacco leaves will still be attached to the separated tobacco stems. The current method for detecting the content of tobacco leaves on the tobacco stems mainly relies on manual detection. The tobacco stems with tobacco leaves are first dried, and then the leaves on the stems are rubbed off by hand, and then weighed to measure the leaf content in the stems. This method requires a lot of manual operation, is inefficient, and is easily affected by human factors and affects the measurement results. Summary of the invention

[0003] The purpose of the present invention is to provide a dual-fluid airflow separation type tobacco stem leaf content detection device to solve the problem that traditional detection methods are inefficient and are greatly affected by human factors; the purpose of the present invention is also to provide a method for determining the leaf content in the stem, which can automatically and quickly detect the leaf content in the stem through the above-mentioned device.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] A double-fluid airflow separation type tobacco stem leaf content detection device comprises a frame, a double-fluid airflow separation unit installed on the frame, and a rolling grinding unit and a weighing unit respectively corresponding to the inlet and outlet positions of the double-fluid airflow separation unit;

[0006] The dual-fluid airflow separation unit comprises a main airflow duct, an auxiliary airflow duct, and a fluidized separation chamber. The main airflow duct is installed in the auxiliary airflow duct to form a main airflow chamber and an auxiliary airflow chamber surrounding the main airflow chamber. The lower ends of the two airflow chambers are separated by an annular partition, and the upper ends are communicated with each other through an inverted cone-shaped mesh cover. The fluidized separation chamber is arranged directly above the main airflow duct and is directly communicated with the main airflow duct, and is communicated with the auxiliary airflow duct through the inverted cone-shaped mesh cover. The upper pipe opening of the main airflow duct is the inlet of the material to be separated and corresponds to the unloading end of the grinding unit. A main airflow air inlet chamber is arranged below the main airflow duct, and an openable and closable pipe sealing plate is arranged on the lower pipe opening of the main airflow duct to control the connection with the main airflow air inlet chamber. The bottom of the main airflow air inlet chamber is a funnel-shaped material outlet and is sealed by a blanking sealing plate. An air inlet of the main airflow duct connected to the main airflow fan is arranged on the side wall of the main airflow air inlet chamber, and an air inlet of the auxiliary airflow duct connected to the auxiliary airflow fan is arranged on the pipe wall of the auxiliary airflow duct.

[0007] The rolling grinding unit includes a grinding belt driven by a motor, a grinding belt support plate, and a grinding plate. The upper surface of the grinding belt is processed with a grinding groove. The grinding plate is arranged above the grinding belt and between the upper surface of the grinding belt to form a kneading channel. The feeding end of the grinding belt is provided with a feeding hopper, and the discharging end of the grinding belt is connected to the upper pipe opening position of the main airflow pipeline in the dual-fluid airflow separation unit.

[0008] The weighing unit is arranged directly below the blanking sealing plate in the dual-fluid airflow separation unit, and is composed of an electronic balance and a tray.

[0009] The grinding plate is a plate with a certain hardness (can be a metal plate, PVC material, rubber material, etc.), with a certain degree of roughness on the surface, and cooperates with the grinding belt to rub the tobacco stems to simulate the state of people rubbing tobacco stems. The grinding plate is located at the feeding end side and has a wedge-shaped structure that is convenient for feeding; the grinding belt is a conveyor belt with grooves on the surface, and the depth of the grooves matches the diameter of the thinner tobacco stems (can be 1-3mm). The grinding belt is tilted, and the tilt angle is 10°-70°, preferably 15°-45°.

[0010] A control panel for displaying and manipulating the working status is arranged on one side of the frame. The control panel is connected to all the electrical components in the device and controls their operation.

[0011] The rolling grinding unit is arranged on the frame through a connecting frame. The discharge end of the rubbing belt in the rolling grinding unit is an embracing discharge port, which is directly connected to the side of the main airflow duct in a circular manner. Specifically, the discharge port of the grinding belt is semicircular, and a semicircular opening is cut on the side of the main airflow channel to match the semicircular shape of the discharge port. After the two are connected, the discharge port embraces the main airflow channel, and the mouth-to-mouth fit is perfect.

[0012] A method for detecting the leaf content in stems using the above device, grinding the tobacco stems by a rolling grinding mechanism to imitate the manual grinding method, fully fluidizing and separating the tobacco stems and tobacco leaves in the fluidization area where the main airflow and the auxiliary airflow are mixed through a dual-fluid airflow separation unit, and then controlling the tobacco stems and tobacco leaves to fall in sequence and be weighed successively, and finally the leaf content in the tobacco stems is obtained.

[0013] The specific steps of this detection method are as follows:

[0014] (1) Turn on the power, start the main airflow fan, auxiliary airflow fan, and drive the motor in the grinding unit;

[0015] (2) Weigh the total weight of tobacco stems with leaves m1;

[0016] (3) Place the tobacco stems with leaves into the feed hopper of the grinding unit;

[0017] (4) The tobacco stems with leaves will move forward on the grinding belt under the friction force of the grinding belt driven by the motor;

[0018] (5) After the tobacco stems with leaves enter the grinding area, they are rubbed by the grinding belt and the grinding plate to separate the tobacco leaves from the stems;

[0019] (6) The separated materials enter the dual-fluid airflow separation unit;

[0020] (7) After being fully fluidized in the separation unit, the tobacco stems gradually fall to the drop sealing plate at the bottom of the separation unit under the influence of gravity;

[0021] (8) Close the main airflow duct sealing plate, turn off the main airflow fan, open the material drop sealing plate, and the separated tobacco stems fall into the tray of the weighing unit;

[0022] (9) Weigh the weight of the tobacco stems m2;

[0023] (10) Calculate the leaf content in the stem T = m2 / m1.

[0024] More specifically, the rolling grinding unit is arranged on the upper part of the frame, and a feed hopper is arranged on one side of the unit. The tobacco stems containing leaves to be measured can be put into the unit from the feed hopper and then fall onto the grinding belt. The tobacco stems containing leaves are conveyed forward by the grinding belt and then enter the intersection area of ​​the grinding belt and the grinding plate and are rolled forward under the action of the friction force of the grinding plate. Then the leaves on the tobacco stems are separated, and the separated leaves and tobacco stems fall into the dual-fluid airflow separation unit below through the dropping port of the rolling grinding unit.

[0025] The dual-fluid airflow separation unit is arranged on one side of the frame, and the feed port of the dual-fluid airflow separation unit corresponds to the blanking port of the upper rolling grinding unit. The dual-fluid airflow separation unit is provided with a main airflow duct and an auxiliary airflow duct. After the two airflows enter the fluidization separation duct, the tobacco stems and the separated leaves falling therein can be fully fluidized in the fluidization chamber area. During the fluidization process, the tobacco stems will gradually fall to the sealing plate below through the main airflow duct under the action of gravity, and the tobacco leaves will circulate in the fluidization area and will not fall. The sealing plate is switched (switching refers to closing the sealing plate of the main airflow channel and opening the blanking sealing plate. At this time, the upper airflow cannot enter the channel due to the closure of the sealing plate of the main airflow channel, and only the auxiliary airflow is available. The upper airflow will become smaller, but the tobacco leaves will still be in a fluidized state at the top due to their relatively light weight), so that the tobacco stems fall onto the balance tray below for weighing. After the weighing is completed, the two airflows are stopped from entering, and the tobacco leaves fall into the tray below.

[0026] The tray of the weighing unit can be used to weigh the tobacco stems with leaves to be initially tested, and can also be used to weigh the tobacco stems and tobacco leaves after the stems and leaves are separated.

[0027] The beneficial effects of the present invention are: the amount of leaves remaining on the tobacco stems can be measured by the cooperation of the rolling grinding unit, the dual-fluid airflow separation unit and the weighing unit, eliminating the tedious process of manual stem-leaf separation, weighing and calculation, reducing labor, and being very convenient to use, greatly improving work efficiency. The significance of dual-airflow separation is that after the main airflow and the auxiliary airflow are mixed, the material can form a bubbling fluidized state in the fluidized zone. Compared with the single airflow, the dual-airflow fluidization separation is more sufficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front view of the present invention;

[0029] Figure 2 is an axonometric view of the present invention;

[0030] Figure 3 It is a cross-sectional view and a schematic diagram of the airflow direction of the grinding unit and the dual-fluid airflow separation unit of the present invention in the separated state (the pipeline sealing plate 1-3 is in the open state, and the blanking sealing plate 1-4 is in the closed state);

[0031] Figure 4 It is a cross-sectional view of the grinding unit and the dual-fluid airflow separation unit of the present invention in the discharge state after separation is completed (the pipeline sealing plate 1-3 is in a closed state, and the blanking sealing plate 1-4 is in an open state);

[0032] Figure 5 A top view of a dual-fluid airflow separation unit of the present invention;

[0033] Figure 6 It is an axonometric diagram of the grinding unit of the present invention;

[0034] Figure 7 This is an axonometric diagram of the grinding unit of the present invention to be assembled;

[0035] Figure 8 It is a schematic diagram of the cooperation between the grinding plate and the grinding belt of the present invention;

[0036] Figure 1-8 Middle: 1-dual fluid air flow separation unit, 1-1 fluidized separation chamber, 1-2 main air flow pipeline, 1-3 main air flow pipeline sealing plate, 1-4 blanking sealing plate, 1-5 main air flow pipeline air inlet, 1-6 auxiliary air flow pipeline air inlet, 1-7 auxiliary air flow pipeline, 1-8 inverted cone mesh cover (i.e. auxiliary air flow pipeline outlet), 1-9 annular partition ， Main air flow inlet chamber 1-10; 2-weighing unit, 2-1 tray, 2-2-balance; 3-auxiliary air flow fan; 4-main air flow fan; 5-control panel; 6-frame; 7-grinding unit, 7-1 feed hopper, 7-2 grinding plate, 7-3 driving mechanism, 7-4 discharge port, 7-5 grinding belt, 7-6 grinding belt support plate. DETAILED DESCRIPTION

[0037] The present invention is further described below in conjunction with the accompanying drawings:

[0038] like Figure 1-8 As shown: a dual-fluid airflow separation type tobacco stem leaf content detection device, comprising a frame 6, a dual-fluid airflow separation unit 1 installed on the frame, and a rolling grinding unit 7 and a weighing unit 2 corresponding to the inlet and outlet positions of the dual-fluid airflow separation unit respectively;

[0039] The dual-fluid airflow separation unit 1 includes a main airflow duct 1-2, an auxiliary airflow duct 1-7, and a fluidized separation chamber 1-1. The main airflow duct 1-2 is installed in the auxiliary airflow duct 1-7 to form a main airflow chamber and an auxiliary airflow chamber surrounding the main airflow chamber. The lower ends of the two airflow chambers are separated by an annular partition 1-9, and the upper ends are connected through an inverted cone mesh cover (i.e., the auxiliary airflow duct air outlet) 1-8. The fluidized separation chamber 1-1 is arranged directly above the main airflow duct 1-2 and is directly connected to the main airflow duct, and is connected to the auxiliary airflow duct through the inverted cone mesh cover 1-8. The upper pipe of the main airflow duct 1-2 The opening is the inlet for materials to be separated and corresponds to the unloading end of the grinding unit 7. A main airflow inlet chamber 1-10 is provided below the main airflow duct 1-2, and an openable and closeable duct sealing plate 1-3 is provided on the lower pipe opening of the main airflow duct to control the connection with the main airflow inlet chamber 1-10. The bottom of the main airflow inlet chamber is a funnel-shaped material outlet and is sealed by a blanking sealing plate 1-4. A main airflow duct air inlet 1-5 connected to the main airflow fan 4 is provided on the side wall of the main airflow inlet chamber 1-10, and an auxiliary airflow duct air inlet 1-6 connected to the auxiliary airflow fan 3 is provided on the pipe wall of the auxiliary airflow duct 1-7.

[0040] In the dual-fluid airflow separation unit, the main airflow enters the main airflow duct 1-2 through the main airflow duct air inlet 1-5. The main airflow duct 1-2 is arranged at the center of the dual-fluid airflow separation unit 1, and the upper part is connected to the fluidized separation chamber 1-1. The main airflow enters the fluidized separation chamber 1-1 through the main airflow duct 1-2. The auxiliary airflow duct air inlet 1-6 is arranged on one side of the dual-fluid airflow separation unit 1, and the auxiliary airflow enters the auxiliary airflow duct 1-7 through the auxiliary airflow duct air inlet 1-6. The auxiliary airflow duct 1-7 is arranged in a ring shape on the outside of the main airflow duct 1-2 to maintain air tightness with the main airflow channel 1-2. The auxiliary airflow duct outlet 1-8 is arranged on the upper inverted cone surface, and the cone surface is evenly distributed with small holes in vertical directions, so that the auxiliary airflow enters the fluidized separation chamber 1-1 through the small holes, and the two airflows of the main airflow duct 1-2 and the auxiliary airflow duct 1-7 converge in the fluidized separation chamber 1-1 (the airflow direction refers to Figure 3), so that the material rolls up and down in the fluidized separation chamber 1-1, which can fully break up the material and facilitate the falling of the tobacco stems, while the tobacco leaves continue to roll up and down, the main airflow duct sealing plate 1-3 is arranged at the lower end of the main airflow duct 1-2, and the blanking sealing plate 1-4 is arranged at the bottom of the dual-fluid airflow separation unit 1. When the tobacco stem separation is completed, the main airflow duct sealing plate 1-3 is closed, the main airflow fan 4 stops, the blanking sealing plate 1-4 is opened, and the tobacco stems fall into the tray below.

[0041] The rolling grinding unit 7 includes a grinding belt 7-5 driven by a motor 7-3, a grinding belt support plate, and a grinding plate 7-2. The upper surface of the grinding belt is processed with a grinding groove. The grinding plate is arranged above the grinding belt and between the upper surface of the grinding belt to form a kneading channel. The feeding end of the grinding belt is provided with a feed hopper 7-1, and the discharging end of the grinding belt is connected to the upper pipe opening position of the main airflow pipeline in the dual-fluid airflow separation unit 1.

[0042] The weighing unit 2 is arranged directly below the blanking sealing plate in the dual-fluid airflow separation unit 1 and is composed of an electronic balance 2-1 and a tray 2-2.

[0043] The grinding plate 7-2 is a plate with a certain hardness and a certain surface roughness. It cooperates with the grinding belt 7-5 to rub the tobacco stems to simulate the state of people rubbing tobacco stems. The grinding plate 7-2 is located on the feeding end side and has a wedge-shaped structure that is convenient for feeding. The grinding belt 7-5 is a conveyor belt made of silicone or soft rubber with grooves on the surface. The softness is close to that of the human palm, and the depth of the groove matches the diameter of the thinner tobacco stems. 。 The polishing belt is tilted, and the tilt angle is preferably 15°-45°.

[0044] A control panel 5 for displaying and manipulating the working status is arranged on one side of the frame 6. The control panel is connected to all the electrical components in the device and controls their operation.

[0045] The rolling grinding unit 7 is arranged on the frame through a connecting frame, and the discharging end of the grinding belt in the rolling grinding unit is an embracing discharging port, which is directly connected to the side of the main airflow duct in a circular interface 。

[0046] The working principle and process of each unit are described as follows in conjunction with the accompanying drawings:

[0047] In the rolling grinding unit 7, the feed hopper 7-1 is located at one end of the unit, and the tobacco stems with leaves to be measured enter from it. The grinding belt 7-5 conveys the tobacco stems with leaves forward under the action of the driving motor 7-3. When passing through the intersection area of ​​the grinding plate 7-2 and the grinding belt 7-5, the tobacco stems with leaves will be rolled forward under the friction of the grinding plate 7-2. In this process, the leaves in the tobacco stems with leaves will fall off and separate from the stems. The leaves and stems that fall off the stems enter the dual-fluid airflow separation unit 1 through the discharge port 7-4.

[0048] In the dual-fluid airflow separation unit 1, the leaves that have been separated from the tobacco stems entering from the discharge port 7-4 will enter the fluidized separation chamber 1-1 upward under the action of the two airflows that converge in the main airflow duct 1-2 and the auxiliary airflow channel 1-3. The material will tumble up and down in the fluidized separation chamber, and the tobacco stems will gradually fall through the main airflow duct 1-2 to the blanking sealing plate 1-4 under the influence of gravity.

[0049] When the dual-fluid airflow separation unit 1 is in the state of separating tobacco stems and leaves, the main airflow duct sealing plate 1-3 is in the open state, and the blanking sealing plate 1-4 is in the closed state. After the separation is completed, the main airflow duct sealing plate 1-3 is closed, the main airflow fan 4 is closed, the blanking sealing plate 1-4 is opened, and the tobacco stems fall into the tray below.

[0050] The use process of the present invention is as follows:

[0051] Take a certain amount of tobacco stems with leaves to be measured and place them on the electronic balance of the weighing unit, record the mass of the tobacco stems with leaves to be measured, and then place the weighed tobacco stems with leaves in the hopper of the rolling grinding unit.

[0052] After pressing the start button on the control panel, the main airflow fan and the auxiliary airflow fan start, and the tobacco stems with leaves will move forward on the grinding belt under the friction force of the grinding belt driven by the driving mechanism. When the tobacco stems with leaves pass through the contact area between the grinding plate and the grinding belt, they will be rolled forward under the friction force of the grinding plate. In this process, the leaves in the tobacco stems with leaves will fall off the stems, and both will continue to be transported forward by the grinding belt and fall into the dual-fluid airflow separation unit below at the drop-off port.

[0053] The leaves that have fallen off the tobacco stems and fall from the blanking port of the rolling grinding unit and enter through the feeding port of the airflow separation unit will enter the fluidized separation chamber upward under the action of the airflow, and tumble fully in the fluidized separation chamber. The tobacco stems fall onto the blanking sealing plate below under the action of gravity. After the separation is completed, the main airflow fan stops running, the main airflow duct sealing plate is closed, the blanking sealing plate is opened, the tobacco stems fall onto the tray below, the weight of the tobacco stems is weighed, and the control system calculates the corresponding leaf content in the stems of this batch of tobacco stems with leaves according to the formula.

[0054] After the calculation is completed, the auxiliary airflow fan stops running, the main airflow duct seal is opened, the tobacco leaves fall into the tray below, and the experiment ends.

Claims

1. A dual-fluid airflow separation type tobacco stem leaf content detection device, characterized in that: It includes a frame, a dual-fluid airflow separation unit installed on the frame, and a rolling grinding unit and a weighing unit corresponding to the inlet and outlet positions of the dual-fluid airflow separation unit respectively; The dual-fluid airflow separation unit comprises a main airflow duct, an auxiliary airflow duct, and a fluidized separation chamber. The main airflow duct is installed in the auxiliary airflow duct to form a main airflow chamber and an auxiliary airflow chamber surrounding the main airflow chamber. The lower ends of the two airflow chambers are separated by an annular partition, and the upper ends are communicated with each other through an inverted cone-shaped mesh cover. The fluidized separation chamber is arranged directly above the main airflow duct and is directly communicated with the main airflow duct, and is communicated with the auxiliary airflow duct through the inverted cone-shaped mesh cover. The upper pipe opening of the main airflow duct is the inlet of the material to be separated and corresponds to the unloading end of the grinding unit. A main airflow air inlet chamber is arranged below the main airflow duct, and an openable and closable pipe sealing plate is arranged on the lower pipe opening of the main airflow duct to control the connection and disconnection with the main airflow air inlet chamber. The bottom of the main airflow air inlet chamber is a funnel-shaped material outlet and is sealed by a blanking sealing plate. An air inlet of the main airflow duct connected to the main airflow fan is arranged on the side wall of the main airflow air inlet chamber, and an air inlet of the auxiliary airflow duct connected to the auxiliary airflow fan is arranged on the pipe wall of the auxiliary airflow duct. The rolling grinding unit comprises a grinding belt driven by a motor, a grinding belt support plate and a grinding plate. The upper surface of the grinding belt is processed with grinding grooves. The grinding plate is arranged above the grinding belt and between the upper surface of the grinding belt to form a kneading channel. The feeding end of the grinding belt is provided with a feeding hopper, and the discharging end of the grinding belt is connected to the upper pipe opening of the main airflow pipeline in the dual-fluid airflow separation unit; the grinding plate is a plate with a certain hardness and a certain surface roughness, and cooperates with the grinding belt to knead the tobacco stems to simulate the state of people kneading tobacco stems; the grinding belt is a conveyor belt with grooves on the surface, and the depth of the grooves matches the diameter size of the thinner tobacco stems; The weighing unit is arranged directly below the blanking sealing plate in the dual-fluid airflow separation unit, and is composed of an electronic balance and a tray.

2. The dual-fluid airflow separation type tobacco stem leaf content detection device according to claim 1, characterized in that: The grinding plate is located at the feeding end side and has a wedge-shaped structure that is convenient for feeding.

3. The dual-fluid airflow separation type tobacco stem leaf content detection device according to claim 1, characterized in that: The grinding belt is tilted, and the tilt angle is 10°-70° 。 4. The dual-fluid airflow separation type tobacco stem leaf content detection device according to claim 1, characterized in that: A control panel for displaying and controlling the working status is arranged on one side of the frame.

5. The dual-fluid airflow separation type tobacco stem leaf content detection device according to claim 4, characterized in that: The control panel is connected to all electrical components in the device and controls their operation.

6. The dual-fluid airflow separation type tobacco stem leaf content detection device according to claim 1, characterized in that: The rolling grinding unit is arranged on the main frame through a connecting frame, and the discharging end of the rubbing belt in the rolling grinding unit is an embracing discharging port, which is directly connected with the side of the main air flow pipeline in a circular shape.

7. A method for detecting the leaf content in stems using the device of claim 1, characterized in that: The tobacco stems are ground by a rolling grinding mechanism to simulate the manual grinding method. The tobacco stems and tobacco leaves are fully fluidized and separated in the fluidization area where the main airflow and the auxiliary airflow are mixed through a dual-fluid airflow separation unit. The tobacco stems and tobacco leaves are then controlled to fall down in sequence and weighed successively to finally obtain the tobacco stem leaf content.

8. The method for detecting the leaf content in stems according to claim 7, characterized in that: The specific steps are as follows: (1) Turn on the power, start the main airflow fan, auxiliary airflow fan, and drive the motor in the grinding unit; (2) Weigh the total weight of tobacco stems with leaves m1; (3) Place the tobacco stems with leaves into the feed hopper of the grinding unit; (4) The tobacco stems with leaves will move forward on the grinding belt under the friction force of the grinding belt driven by the motor; (5) After the tobacco stems with leaves enter the grinding area, they are rubbed by the grinding belt and the grinding plate to separate the tobacco leaves from the stems; (6) The separated materials enter the dual-fluid airflow separation unit; (7) After being fully fluidized in the separation unit, the tobacco stems gradually fall to the drop sealing plate at the bottom of the separation unit under the influence of gravity; (8) Close the main airflow duct sealing plate, turn off the main airflow fan, open the material drop sealing plate, and the separated tobacco stems fall into the tray of the weighing unit; (9) Weigh the weight of the tobacco stems m2; (10) Calculate the leaf content in the stem T = m2 / m1.

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