A method of frequency regulation for an air separator

Abstract

The application discloses a frequency adjusting method of a winnower, which is used for adjusting the instantaneous frequency of the winnower in a cut tobacco winnower production line. After the tobacco material flows through a cut tobacco machine, the winnower frequency adjusting method comprises the following steps: obtaining a frequency setting value of the winnower, a flow setting value of the tobacco material and a second flow value of the tobacco material when flowing through a second detection position, wherein the second detection position is located between a discharge port of the cut tobacco machine and a feeding port of the winnower; calculating an instantaneous frequency value of the winnower according to the frequency setting value, the flow setting value, the second flow value and a first adjusting function; and updating the frequency of the winnower to the calculated instantaneous frequency value. The application can adjust the frequency of the winnower according to the flow change of the tobacco material at the discharge port of the cut tobacco machine, so that the cut tobacco and the tobacco stem in the tobacco material can be completely separated.

Description

TECHNICAL FIELD

[0001] The present application relates to the tobacco processing technical field, and particularly relates to a frequency adjusting method of an air separator. BACKGROUND

[0002] In the tobacco industry, the tobacco air separator is located downstream of the cut tobacco dryer and is mainly used for screening and removing the stems in the tobacco. The working principle of the air separator is to separate the lighter tobacco from the heavier stems by air. In the prior art, the frequency and flow rate of the air separator are fixed values set according to the brand of the tobacco, for example, the frequency set value of the air separator for a certain brand of tobacco is 37 Hz and the flow rate set value is 50 kg / min. However, the moisture value of the tobacco before drying is a fluctuating value, which leads to unstable flow rate of the tobacco at the outlet of the cut tobacco dryer. The air separator operates at a fixed frequency set value and cannot change according to the flow rate of the tobacco at the outlet of the cut tobacco dryer. When the flow rate of the tobacco at the outlet of the cut tobacco dryer decreases and the frequency of the air separator is too large, the content of stems in the tobacco at the outlet of the air separator increases, which increases the rate of defective tobacco. When the flow rate of the tobacco at the outlet of the cut tobacco dryer increases and the frequency of the air separator is too small, the tobacco cannot be completely separated from the stems, which causes waste of tobacco. SUMMARY

[0003] The present application aims to solve the technical problem that the frequency of the air separator cannot be automatically adjusted according to the flow rate of the tobacco at the outlet of the cut tobacco dryer. The present application provides a frequency adjusting method of an air separator, which can adjust the frequency of the air separator according to the flow rate of the tobacco at the outlet of the cut tobacco dryer, so that the tobacco and the stems can be completely separated.

[0004] To solve the above technical problem, the embodiments of the present application disclose a frequency adjusting method of an air separator, which is used for adjusting the instantaneous frequency of the air separator in a cut tobacco air separation production line, wherein the tobacco flows into the air separator after passing through the cut tobacco dryer, and the frequency adjusting method of the air separator comprises the following steps:

[0005] obtaining a frequency set value of the air separator, a flow rate set value of the tobacco and a second flow rate value of the tobacco when flowing through a second detection position, wherein the second detection position is located between the outlet of the cut tobacco dryer and the inlet of the air separator;

[0006] calculating an instantaneous frequency value of the air separator according to the frequency set value, the flow rate set value, the second flow rate value and a first adjusting function; and updating the frequency of the air separator to the calculated instantaneous frequency value.

[0007] Optionally, the first adjusting function is:

[0008]

[0009] wherein F2 is an instantaneous frequency value of the winnower, V2 is the second flow value, F is a frequency setting value, and V is a flow setting value.

[0010] Optionally, obtaining the second flow value comprises:

[0011] obtaining a first moisture value of the tobacco material when flowing through a first detection position, a first flow value of the tobacco material when flowing through the first detection position, and a second moisture value of the tobacco material when flowing through a second detection position, wherein the first detection position is located in a section before the tobacco material enters the cut-tobacco machine.

[0012] calculating the second flow value according to the first moisture value, the second moisture value, the first flow value, and a second adjustment function.

[0013] Optionally, the second adjustment function is:

[0014]

[0015] wherein V1 is the first flow value, M1 is the first moisture value, V2 is the second flow value, and M2 is the second moisture value.

[0016] Optionally, the method for constructing the second adjustment function comprises:

[0017] establishing a first relationship between the tobacco material quality before cutting and the dry tobacco material quality before cutting;

[0018] establishing a second relationship between the tobacco material quality after cutting and the dry tobacco material quality after cutting;

[0019] establishing a third relationship between the tobacco material quality before cutting and the first flow value;

[0020] establishing a fourth relationship between the tobacco material quality after cutting and the second flow value;

[0021] constructing the second adjustment function according to the first relationship, the second relationship, the third relationship, and the fourth relationship, wherein the dry tobacco material quality before cutting is the mass of the dry substance of the tobacco material before entering the cut-tobacco machine after removing the moisture, and the dry tobacco material quality after cutting is the mass of the dry substance of the tobacco material output by the cut-tobacco machine after removing the moisture.

[0022] Optionally, when the tobacco material enters the winnower, the frequency of the winnower is updated to the calculated instantaneous frequency value.

[0023] Optionally, the method for determining that the tobacco material has entered the winnower comprises: determining that the tobacco material has entered the winnower when the tobacco material enters the second detection position and delays for a time T, wherein the time T is the time required for the tobacco material to run from the second detection position to the winnower.

[0024] Optionally, the first detection position is provided with an electronic belt scale, and the electronic belt scale is used for detecting the first flow value.

[0025] Optionally, a first moisture meter is arranged above the electronic belt scale, and the first moisture meter is used for detecting a first moisture value.

[0026] Optionally, a second moisture meter is arranged at the second detection position, and the second moisture meter is used for detecting a second moisture value.

[0027] Optionally, the first detection position is located at a material inlet of the cut tobacco dryer, and the second detection position is located at a material outlet of the cut tobacco dryer.

[0028] Compared with the prior art, the present application has the following beneficial effects:

[0029] According to the frequency set value of the winnower, the flow set value of the tobacco material, the second flow value of the tobacco material when flowing through the second detection position and the first adjustment function, the embodiment of the present application calculates the instantaneous frequency value of the winnower, wherein the second flow value is the independent variable, and the instantaneous frequency value is the dependent variable, and the instantaneous frequency value of the winnower can change with the change of the second flow value, so that the frequency adjustment of the winnower is realized, the output wind power of the winnower is adjusted, the cut tobacco and the tobacco stem can be completely separated, and the high stem rate in the cut tobacco or the waste of the cut tobacco caused by the inadaptation of the wind power and the flow of the tobacco material is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 A flow chart of the winnower frequency adjustment method according to an embodiment of the present application is shown;

[0031] Figure 2 A structure schematic diagram of the cut tobacco winnowing production line according to an embodiment of the present application is shown.

[0032] Reference signs:

[0033] 1. cut tobacco dryer, 11. material inlet, 12. material outlet, 2. winnower, 3. first detection position, 4. second detection position, 5. electronic belt scale, 6. first moisture meter, 7. second moisture meter. DETAILED DESCRIPTION

[0034] The advantages and effects of the present application can be easily understood by those skilled in the art from the description of the present application. Although the present application will be described in connection with the preferred embodiments, this is not intended to limit the features of the present application to those embodiments. On the contrary, the purpose of describing the application in connection with the embodiments is to cover other alternatives or modifications that can be extended based on the claims of the present application. In order to provide a better understanding of the present application, many specific details will be included in the following description. The present application can also be implemented without using these details. In addition, in order to avoid confusion or ambiguity of the present application, some specific details will be omitted in the description. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0035] It should be noted that in the present specification, similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0036] In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0037] The terms "first", "second", and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present embodiment, it should also be noted that unless otherwise explicitly specified and limited, the terms "provided", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present embodiment can be understood according to the specific circumstances.

[0039] In order to make the purpose, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below in combination with the drawings.

[0040] The present application provides a frequency adjustment method of an air separator, which is used to adjust the instantaneous frequency of an air separator 2 in a cut tobacco air separation production line, wherein, as shown in Figure 2 The tobacco material flows into the air separator 2 after the cut tobacco machine 1, as shown in Figure 1As shown, the adjustment method of the winnower frequency comprises:

[0041] Step S1: obtaining a frequency setting value, a flow setting value of the winnower 2 and a second flow value of the tobacco material when flowing through the second detection position 4, wherein the second detection position 4 is located between the discharge port 12 of the cut tobacco drying machine 1 and the inlet port 11 of the winnower 2;

[0042] Specifically, the tobacco material is not all the tobacco material on the production line, but the detected part of the tobacco material; and the detection of the tobacco material is not continuous, but is performed once at intervals and the frequency of the winnower 2 is adjusted. The frequency setting value and the flow setting value are fixed values set according to the brand and type of the tobacco material, for example, the frequency setting value of a certain brand of tobacco material is 37 Hz and the flow setting value is 50 kg / min.

[0043] Step S2: calculating an instantaneous frequency value of the winnower 2 according to the frequency setting value, the flow setting value, the second flow value and a first adjustment function;

[0044] Step S3: updating the frequency of the winnower 2 to the calculated instantaneous frequency value.

[0045] According to the frequency setting value, the flow setting value and the second flow value of the tobacco material when flowing through the second detection position 4 and the first adjustment function, the embodiment of the present application calculates the instantaneous frequency value of the winnower 2; wherein the second flow value is the independent variable and the instantaneous frequency value is the dependent variable, the instantaneous frequency value of the winnower 2 can change with the change of the second flow value, the frequency adjustment of the winnower 2 is realized, and then the output wind force adjustment of the winnower 2 is realized, so that the tobacco and the stem in the tobacco material can be completely separated, and the high stem rate in the tobacco or the waste of the tobacco caused by the inadaptation of the wind force and the flow of the tobacco material is avoided.

[0046] Further, the first adjustment function is:

[0047]

[0048] Wherein, F2 is the instantaneous frequency value of the winnower 2, V2 is the second flow value, F is the frequency setting value, and V is the flow setting value. The first adjustment function indicates that the instantaneous frequency value F2 of the winnower 2 is in a positive proportional relationship with the size of the second flow value V2, and the ratio of the instantaneous frequency value F2 of the winnower 2 to the second flow value V2 is equal to the ratio of the frequency setting value F to the flow setting value V.

[0049] Further, obtaining the second flow value comprises:

[0050] The first moisture value of the tobacco material when flowing through the first detection position 3, the first flow value of the tobacco material when flowing through the first detection position 3, and the second moisture value of the tobacco material when flowing through the second detection position 4 are obtained; wherein the first detection position 3 is located in the interval section before the tobacco material enters the cut tobacco drying machine 1; the tobacco material before entering the cut tobacco drying machine 1 is the pre-cut tobacco material, the tobacco material output from the cut tobacco drying machine 1 is the post-cut tobacco material, the sum of the mass of the moisture contained in the pre-cut tobacco material and the mass of the dry tobacco material is the pre-cut tobacco material mass, and the sum of the mass of the moisture contained in the post-cut tobacco material and the mass of the dry tobacco material is the post-cut tobacco material mass; the first moisture value is the percentage of the mass of the moisture contained in the pre-cut tobacco material in the pre-cut tobacco material mass, the second moisture value is the percentage of the mass of the moisture contained in the post-cut tobacco material in the post-cut tobacco material mass, and the first flow value is the flow value of the pre-cut tobacco material;

[0051] The second flow value is calculated according to the first moisture value, the second moisture value, the first flow value, and the second adjustment function.

[0052] Specifically, the first detection position 3 is located at the material inlet 11 of the cut tobacco drying machine 1, and the second detection position 4 is located at the material outlet 12 of the cut tobacco drying machine 1.

[0053] Further, the first detection position 3 is provided with an electronic belt scale 5, and the electronic belt scale 5 is used to detect the first flow value.

[0054] Further, the second detection position 4 is provided with a second moisture instrument, and the second moisture instrument is used to detect the second moisture value.

[0055] Further, a first moisture instrument 6 is arranged above the electronic belt scale 5, and the first moisture instrument 6 is used to detect the first moisture value.

[0056] Further, the second adjustment function is:

[0057]

[0058] Wherein, V1 is the first flow value, M1 is the first moisture value, V2 is the second flow value, and M2 is the second moisture value. Figure 2In the shown cuttage and winnowing production line, X shows the direction of tobacco material running, the front end of the cuttage machine 1 inlet 11 is provided with an electronic belt scale 5, which is used to detect the first flow value to control the tobacco material flow at the inlet end (i.e. the first flow value), so that the tobacco material can be stably input into the cuttage machine 1 at a uniform flow; however, the rear end of the cuttage machine 1 is not provided with an electronic belt scale 5, so the second flow value cannot be directly detected; if an electronic belt scale 5 is additionally installed between the cuttage machine 1 and the winnowing machine 2, the engineering quantity is large, the investment cost is high, and the space in the production workshop is limited and the production line cannot be transformed. Part of the water in the tobacco material after the cuttage machine 1 will be lost, so that the second flow value is smaller than the first flow value; therefore, the second flow value can be calculated by detecting the first moisture value and the second moisture value of the tobacco material before and after the cuttage, and the first moisture instrument 6 is arranged at the first detection position 3 and the second moisture instrument is arranged at the second detection position 4, so that the detection of the first moisture value and the second moisture value can be realized.

[0059] Further, the construction method of the second adjustment function comprises:

[0060] establishing a first relationship between the tobacco material quality before cuttage and the dry tobacco material quality before cuttage;

[0061] W1 = W d + W1M1

[0062] establishing a second relationship between the tobacco material quality after cuttage and the dry tobacco material quality after cuttage;

[0063] W2 = W d + W2M2

[0064] establishing a third relationship between the tobacco material quality before cuttage and the first flow value;

[0065] W1 = V1t

[0066] establishing a fourth relationship between the tobacco material quality after cuttage and the second flow value;

[0067] W2 = V2t

[0068] wherein, in the above first to fourth relationships, W1 represents the tobacco material quality before cuttage, W2 represents the tobacco material quality after cuttage, W d represents the mass of the dry tobacco material before cuttage and the mass of the dry tobacco material after cuttage (the mass of the dry tobacco material before and after cuttage is constant), M1 is the first moisture value, M2 is the second moisture value, V1 is the first flow value, V2 is the second flow value, and t is the running time of the tobacco material;

[0069] The second adjustment function is constructed according to the first relationship, the second relationship, the third relationship and the fourth relationship. Specifically, the mass of the dry tobacco material before cuttage is equal to the mass of the dry tobacco material after cuttage, so that the fifth relationship can be obtained from the first relationship and the second relationship:

[0070] W1(1-M1) = W2(1-M2)

[0071] The third and fourth relationships are substituted into the fifth relationship to obtain the second adjustment function.

[0072] Further, when the tobacco material enters the aspirator 2, the frequency of the aspirator 2 is updated to the calculated instantaneous frequency value.

[0073] Further, the method for determining that the tobacco material enters the aspirator 2 includes that the tobacco material enters the second detection position 4 and is determined to have entered the aspirator 2 after a delay of T time, wherein the T time is the time required for the tobacco material to travel from the second detection position 4 to the aspirator 2. In this embodiment, the tobacco material travel speed is fixed, and the distance between the second detection position 4 and the aspirator 2 is also fixed, so the time T required for the tobacco material to travel from the second detection position 4 to the aspirator 2 is fixed. Specifically, when the second moisture meter detects the second moisture value, the frequency of the aspirator 2 is updated to the calculated instantaneous frequency value after a delay of T time.

[0074] Further, the cut tobacco aspirating production line further includes a control system electrically connected with the first moisture meter 6, the second moisture meter, the electronic belt scale 5, and the aspirator 2, and the control system includes a storage unit for storing the flow set value, the frequency set value, the first adjustment function, and the second adjustment function; an interaction unit electrically connected with the storage unit, for selecting the flow set value and the frequency set value; and a processing unit electrically connected with the storage unit, the interaction unit, the first moisture meter 6, the second moisture meter, the electronic belt scale 5, and the aspirator 2, for calling the flow set value, the frequency set value, the first adjustment function, and the second adjustment function in the storage unit, and for receiving the first moisture value, the second moisture value, and the first flow value, and calculating the instantaneous frequency value of the aspirator 2 according to the first adjustment function and the second adjustment function, and sending the calculated instantaneous frequency value to the aspirator 2.

[0075] The working principle of the aspirator frequency adjustment method disclosed in the embodiments of the present application is as follows:

[0076] The tobacco material enters the first detection position 3, the electronic belt scale 5 detects the first flow value of the tobacco material, the first moisture meter 6 detects the first moisture value of the tobacco material, and the first flow value and the first moisture value are fed back to the control system; the tobacco material loses part of the moisture through the drying process of the drying machine 1, the tobacco material is output from the discharge port 12 of the drying machine 1 and enters the second detection position 4, the second moisture meter detects the second moisture value of the tobacco material, and the second moisture value is fed back to the control system; the control system calculates the instantaneous frequency value of the winnower 2 according to the first adjustment function and the second adjustment function; when the material runs to the winnower 2, the control system sends the instantaneous frequency value to the winnower 2, updates the frequency of the winnower 2 to the calculated instantaneous frequency value, and completes the frequency adjustment of the winnower 2.

[0077] While the application has been illustrated and described in detail in the drawings and foregoing description, the same should be considered as illustrative and not restrictive in character, since the application includes all modifications or equivalents falling within the spirit or scope of the application.

Claims

1. A method of frequency regulation of an air bender for regulating the instantaneous frequency of an air bender (2) in a cut tobacco air bender production line, wherein, The tobacco material flows into the winnower (2) after the cut tobacco machine (1), and the frequency adjustment method of the winnower comprises: obtaining a frequency setting value of the winnower (2), a flow setting value of the tobacco material, and a second flow value of the tobacco material when flowing through a second detection position (4), wherein the second detection position (4) is located between an outlet (12) of the cut tobacco machine (1) and an inlet (11) of the winnower (2); calculating an instantaneous frequency value of the winnower (2) according to the frequency setting value, the flow setting value, the second flow value, and a first adjustment function; updating the frequency of the winnower (2) to the calculated instantaneous frequency value; the first adjustment function is: ， wherein F2 is the instantaneous frequency value, V2 is the second flow value, F is the frequency setting value, and V is the flow setting value; obtaining the second flow value comprises: obtaining a first moisture value of the tobacco material when flowing through a first detection position (3), a first flow value of the tobacco material when flowing through the first detection position (3), and a second moisture value of the tobacco material when flowing through the second detection position (4), wherein the first detection position (3) is located in a section before the tobacco material enters the cut tobacco machine (1); calculating the second flow value according to the first moisture value, the second moisture value, the first flow value, and a second adjustment function; the second adjustment function is: ， wherein V1 is the first flow value, M1 is the first moisture value, V2 is the second flow value, and M2 is the second moisture value; the method for constructing the second adjustment function comprises: establishing a first relationship between the mass of the tobacco material before cutting and the mass of dry tobacco material before cutting; establishing a second relationship between the mass of the tobacco material after cutting and the mass of dry tobacco material after cutting; establishing a third relationship between the mass of the tobacco material before cutting and the first flow value; establishing a fourth relationship between the mass of the tobacco material after cutting and the second flow value; constructing the second adjustment function according to the first relationship, the second relationship, the third relationship, and the fourth relationship, wherein the mass of the tobacco material before cutting is the mass of the tobacco material before entering the cut tobacco machine (1), the mass of the tobacco material after cutting is the mass of the tobacco material after being output from the cut tobacco machine (1), the mass of dry tobacco material before cutting is the mass of dry material of the tobacco material before entering the cut tobacco machine (1) after removing moisture, and the mass of dry tobacco material after cutting is the mass of dry material of the tobacco material output from the cut tobacco machine (1) after removing moisture.

2. The method of claim 1, wherein the frequency of the air separator is adjusted by, The frequency of the winnower (2) is updated to the calculated instantaneous frequency value when the tobacco material enters the winnower (2).

3. The method of claim 2, wherein the frequency of the air separator is adjusted by, The method for determining that the tobacco material enters the winnower (2) comprises: starting timing when the tobacco material runs to the second detection position (4), and determining that the tobacco material enters the winnower (2) when the timing time reaches a preset time, wherein the preset time is the time required for the tobacco material to run from the second detection position (4) to the winnower (2).

4. The method of claim 1, wherein the frequency of the air separator is adjusted by, The first detection position (3) is provided with an electronic belt scale (5) for detecting the first flow value.

5. The method of claim 4, wherein the frequency of the air separator is adjusted by, The electronic belt scale (5) is provided with a first moisture meter (6) above, and the first moisture meter (6) is used for detecting the first moisture value.

6. The method of claim 1, wherein the frequency of the air table is adjusted by, The second detection position (4) is provided with a second moisture meter, and the second moisture meter is used for detecting the second moisture value.

7. The method of claim 1, wherein the frequency of the air separator is adjusted by, The first detection position (3) is located at the inlet (11) of the cut tobacco dryer (1), and the second detection position (4) is located at the outlet (12) of the cut tobacco dryer (1).

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