CN113171986A - Method for automatically controlling stem removing amount of air separator - Google Patents
Method for automatically controlling stem removing amount of air separator Download PDFInfo
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- CN113171986A CN113171986A CN202110545415.7A CN202110545415A CN113171986A CN 113171986 A CN113171986 A CN 113171986A CN 202110545415 A CN202110545415 A CN 202110545415A CN 113171986 A CN113171986 A CN 113171986A
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- air
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- dust removal
- winnowing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/04—Control arrangements
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B5/00—Stripping tobacco; Treatment of stems or ribs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
- B07B9/02—Combinations of similar or different apparatus for separating solids from solids using gas currents
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Abstract
The invention discloses a method for automatically controlling the stem removing amount of an air classifier, which is characterized in that an anemoscope is added in a dust removing pipeline of a primary air classifying box and a secondary air classifying box, the anemoscope collects an analog signal and converts the analog signal into a digital signal, the digital signal is converted into an air speed signal according to the measuring range of the anemoscope, and then the actual value of the air quantity of the air classification is obtained through calculation; the PID controller of the bottom layer electric control system calculates the opening ratio cv of the electric air valve according to the actual value of the air selection quantity and a preset air selection quantity set value; the PID controller of the bottom layer electric control system converts the opening proportion cv of the electric air valve into a digital quantity current signal, configures the digital quantity current signal into an analog signal through hardware configuration, inputs the analog signal into the electric air valve of the pipeline and controls the opening degree of the electric air valve of the dust removal pipeline. The invention adds an anemometer to measure the actual value of the winnowing air quantity, and controls the dust removal air valve through the PID controller to enable the actual winnowing air quantity to be matched with the set value of the air quantity so as to achieve the purpose of controlling the rejection rate of the cut tobacco stems.
Description
Technical Field
The invention relates to the technical field of cigarette quality control, in particular to a method for automatically controlling the stem removing amount of an air separator.
Background
FS43B full-dedusting fan blade silk two-stage air separator provides air separation power by a dust separator dedusting fan, adopts a flexible air separation principle of combining bleaching and flotation in a secondary air separation box, and separates stems in tobacco products in a mode of air separation without air conveying. The full-dedusting fan blade and shred two-stage winnowing machine has the advantages of fast tobacco shred shaping and simple equipment structure, but has the defects that winnowing kinetic energy is provided by a deduster, air quantity is not detected by a metering instrument, the air quantity is changed by manually and manually adjusting the opening degree of a dedusting air valve in the production process to meet the requirement of removing stems of tobacco shreds, however, the manual adjusting method cannot effectively judge the stem removing effect in time, the stem removing rate of the tobacco shreds cannot reach the standard due to adjustment lag, and the stability and controllability of the stem removing rate of the tobacco shreds cannot be ensured.
Disclosure of Invention
The invention aims to provide a method for automatically controlling the stem removing amount of an air separator, which is used for solving the problems that the stem removing effect cannot be effectively judged in time, the stem removing rate of tobacco shreds does not reach the standard due to lag adjustment, and the stable and controllable stem removing rate of the tobacco shreds cannot be ensured in the manual adjusting method in the prior art.
The invention solves the problems through the following technical scheme:
a method for automatically controlling the stem removing amount of an air classifier comprises the following steps:
step S1: anemometers are added in dust removing pipelines of a first-stage winnowing box and a second-stage winnowing box of the full dust removal air seal winnowing machine, the anemometers are connected with a programmable controller AI module, the programmable controller AI module is used for converting analog signals collected by the anemometers into digital quantity signals, converting the digital quantity signals into wind speed signals according to the measuring range of the anemometers, and calculating according to the wind speed signals and the ventilation area of the pipeline to obtain the actual value of winnowing air volume;
step S2: the PID controller of the bottom layer electric control system receives the actual value of the air separation volume output by the AI module and calculates the opening ratio cv of the electric air valve according to the actual value of the air separation volume and a preset air separation volume set value;
step S3: the PID controller of the bottom layer electric control system converts the opening proportion cv of the electric air valve into a digital quantity current signal, configures the digital quantity current signal into an analog signal through hardware configuration, inputs the analog signal into the electric air valve of the pipeline and controls the opening degree of the electric air valve of the dust removal pipeline.
The preset air quantity set value of the air separation is obtained by the following steps:
the upper computer automatically identifies the production brand in the production work order when the production work order is loaded from the mes system;
and searching the corresponding relation between the production brand stored in the mes system and the set values of the air separation air quantity in the dust removing pipelines of the primary air separation box and the secondary air separation box to obtain the set value of the air separation air quantity.
The calculation method for calculating the actual value of the air quantity of the air separation by the AI module comprises the following steps:
step A1: receiving an analog current signal output by an anemometer and converting the analog current signal into a digital quantity signal;
step A2: converting the digital quantity signal into a wind speed signal V according to the range of the anemometer by scale conversioni；
Step A3: will wind speed signal ViConverting to obtain a primary and a secondary winnowing boxesAverage wind speed V of the dust removal pipeline:
V＝A+BVi
wherein, A and B are wind speed correction coefficients;
step A4: calculating the ventilation area of the dust removal pipeline of the first-stage winnowing box and the second-stage winnowing box as follows: f ═ pi (d/2)2, d is the diameter of the dust removal pipeline of the primary and secondary winnowing boxes;
step A5: calculating the air volume L of the pipeline according to the average wind speed V and the ventilation area of the dust removal pipeline of the primary and secondary air separation boxes: L3600V F.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the invention calculates the actual value of the winnowing air quantity by adding a first-stage winnowing box anemoscope and a second-stage winnowing box anemoscope, and controls a dedusting air valve by a bottom-layer electric control system PID controller to enable the actual winnowing air quantity to be matched with the set value of the dedusting air quantity of a first-stage winnowing box and a second-stage winnowing box in an automatic loading production execution system (mes) formula work order, so that the aim of automatically controlling the rejection rate of tobacco shred stems is fulfilled.
(2) According to the invention, the air volume change caused by the influence of external factors can be automatically and rapidly adjusted by adjusting the air volume of the primary and secondary air sorting boxes of the full dust removal air two-stage air separator, the defect that the tobacco shred stem removing rate does not reach the standard due to the fact that the stem removing effect cannot be timely and effectively judged and factors such as adjustment lag and the like are caused by manually adjusting the air volume by means of manually observing the stem removing amount is avoided, the method for ensuring the stability and the controllability of the tobacco shred stem removing rate has the advantages of simplicity in control, low hardware investment cost and stability and reliability in realizing effect.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a structural diagram of a two-stage air classifier with fully dedusting fan blades and wires;
wherein, 1-flexible inlet auxiliary connection equipment, 2-primary air separation box, 3-primary air separation electric air valve, 4-primary air separation anemograph, 5-primary dust removal pipeline, 6-secondary dust removal pipeline, 7-secondary air separation anemograph, 8-secondary air separation electric air valve, 9-flexible air separation outlet auxiliary connection equipment, 10-secondary air separation blanking device, 11-secondary air separation rectangular pipe, 12-interstage auxiliary connection equipment and 13-secondary air separation box.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Example (b):
referring to fig. 1 and 2, a method for automatically controlling the stem removing amount of an air classifier is described by taking an FS43 full dust removal fan blade silk two-stage air classifier as an example: FS43 full dust removal fan blade silk two-stage air separator has a one-level wind selector case 2, there is one-level selection by winnowing electric air valve 3 one-level selection by winnowing in one-level wind selector case 2 and the entrance of 5 connection of one-level dust removal pipeline, five times pipeline diameter distance department newly increases one-level selection by winnowing anemoscope 4 behind the 5 first return bend of one-level dust removal pipeline, one-level wind selector case 2 ejection of compact airlock is assisted with the flexible selection by winnowing ejection of compact and is linked to each other equipment 9, the opposite side and the flexible entry of one-level wind selector case 2 are assisted with allied equipment 1 and are connected, 2 secondary separation casees of one-level wind selector case are assisted with allied equipment 13 through stage and are linked to each other equipment 12 and second grade wind selector case 13. Second grade selection by winnowing case 13 selection by winnowing mouth links to each other with second grade selection by winnowing quarter bend 11, second grade selection by winnowing quarter bend 11 links to each other with second grade selection by winnowing blanking ware 10, second grade selection by winnowing blanking ware 10 discharge end is assisted with flexible selection by winnowing export and is linked to each other with second grade dust removal pipeline 6, second grade selection by winnowing blanking ware 10 dust removal mouth links to each other with second grade dust removal pipeline 6, second grade selection by winnowing electric air valve 8 has 6 entrances of second grade dust removal pipeline, five times pipeline diameter distance department newly increases second grade selection by winnowing anemoscope 7 behind the first return bend of second grade dust removal pipeline 6, second grade selection by winnowing case 13 lower extreme is the stalk and rejects the mouth.
And carrying out a large number of tests according to different brands of products and the air quantity of the dust removal pipeline to obtain a corresponding value of the set value of the winnowing air quantity and the stem removing rate corresponding to the production brand.
And (3) inputting the primary and secondary air separation volume and the corresponding value of the production brand into each brand formula parameter of a mes (manufacturing execution system) system database, and loading a primary and secondary air separation volume set value corresponding to the brand in the production formula when the upper computer loads a production worksheet from the mes system.
The method for measuring the set value is the same as the method for actually detecting the air quantity value, and comprises the following steps:
the primary air separation anemoscope 4 and the secondary air separation anemoscope 7 adopt 4-20ma analog quantity signal acquisition and are connected to an AI input module added in the control module. In the control program of the control module, the input analog quantity current signal is configured with a corresponding digital quantity signal through hardware configuration, and the corresponding relation is as follows:
the 4ma analog quantity signal corresponds to digital quantity 6553;
the 20ma analog quantity signal corresponds to the digital quantity 32767.
The converted digital quantity signal is converted into a wind speed signal according to the range of the anemometer by a written scale conversion function block program, for example, the scale conversion program relation of the anemometer with the range of 30m/s is as follows:
the digital quantity 6553 corresponds to the wind speed of 0 m/s;
the digital quantity 32767 corresponds to a wind speed of 30 m/s.
The converted digital quantity signal is converted into an anemoscope signal V according to the range of the anemoscope by programming a scale conversion function block programi1,Vi2. Calculating formula according to average wind speed: calculating an average anemometer wind speed value by taking V as A + BVi (m/s) (V is the average anemometer wind speed, Vi is a wind speed signal, and A and B values are wind speed correction coefficients);
calculate the pipeline draught area through a second grade wind selector dust removal pipeline pipe diameter and do: f ═ pi (d/2) 2;
according to an air volume calculation formula: L3600V F. And calculating air outlet values L1 and L2.
During actual measurement, data corresponding to air separation air quantity and stem removal rate of the early-stage test brand M1 are recorded in mes formula parameters in advance, wherein the set values of the primary air separation air quantity and the secondary air separation air quantity are a1 and a 2. When the brand M1 is produced, the upper computer loads all the recipe parameters in the brand M1 through mes (manufacturing execution system), wherein the primary air volume setting value a1 and the primary air volume setting value a2 in the recipe parameters are loaded into the parameters of the underlying electric control system and automatically loaded as the primary air volume setting value. And a PID control program is added in the bottom layer electric control program, and the output cv value (the opening ratio value of the electric air valve is 0-100%) is automatically calculated through the sp value (the set value a1, a2) and the pv value (the air selection air quantity L1, L2). The PID output cv value is converted into a digital output value by writing a scale conversion function block program, and the corresponding relation is as follows: the opening degree of 0% corresponds to a numerical value of 6553, and the opening degree of 100% corresponds to a numerical value of 32767. The output digital quantity current signal and the corresponding analog signal are configured through hardware configuration in a control program, and the corresponding relation is as follows: digital quantity 6553 corresponds to a 4ma analog quantity signal; the digital quantity 32767 corresponds to a 20ma analog quantity signal. As shown in the figure five, the pipeline electric air valve with analog input control is connected with the analog output module, the output quantity of the air valve is automatically adjusted through PID, the opening degree of the dust removal pipeline electric air valve is adjusted through digital-to-analog conversion and an output current signal of the analog output module, so that the air quantity value of the primary and secondary air separation boxes is adjusted, and the stem removing rate of each batch is guaranteed to reach the standard.
Although the present invention has been described herein with reference to the illustrated embodiments thereof, which are intended to be preferred embodiments of the present invention, it is to be understood that the invention is not limited thereto, and that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure.
Claims (3)
1. A method for automatically controlling the stem removing amount of an air classifier is characterized by comprising the following steps:
step S1: anemometers are added in dust removing pipelines of a first-stage winnowing box and a second-stage winnowing box of the full dust removal air seal winnowing machine, the anemometers are connected with a programmable controller AI module, the programmable controller AI module is used for converting analog signals collected by the anemometers into digital quantity signals, converting the digital quantity signals into wind speed signals according to the measuring range of the anemometers, and calculating according to the wind speed signals and the ventilation area of the pipeline to obtain the actual value of winnowing air volume;
step S2: the PID controller of the bottom layer electric control system receives the actual value of the air separation volume output by the AI module and calculates the opening ratio cv of the electric air valve according to the actual value of the air separation volume and a preset air separation volume set value;
step S3: the PID controller of the bottom layer electric control system converts the opening proportion cv of the electric air valve into a digital quantity current signal, configures the digital quantity current signal into an analog signal through hardware configuration, inputs the analog signal into the electric air valve of the pipeline and controls the opening degree of the electric air valve of the dust removal pipeline.
2. The method as claimed in claim 1, wherein the predetermined value of the blowing rate is obtained by:
the upper computer automatically identifies the production brand in the production work order when the production work order is loaded from the mes system;
and searching the corresponding relation between the production brand stored in the mes system and the set values of the air separation air quantity in the dust removing pipelines of the primary air separation box and the secondary air separation box to obtain the set value of the air separation air quantity.
3. The method for automatically controlling the stem removing amount of the air classifier as claimed in claim 1, wherein the calculation method for calculating the actual value of the air volume of the air classifier by the AI module of the programmable controller is as follows:
step A1: receiving an analog current signal output by an anemometer and converting the analog current signal into a digital quantity signal;
step A2: converting the digital quantity signal into a wind speed signal V according to the range of the anemometer by scale conversioni；
Step A3: will wind speed signal ViAnd (3) converting to obtain the average wind speed V of the dust removal pipelines of the primary and secondary air separation boxes:
V＝A+BVi
wherein, A and B are wind speed correction coefficients;
step A4: calculating the ventilation area of the dust removal pipeline of the first-stage winnowing box and the second-stage winnowing box as follows: f ═ pi (d/2)2, d is the diameter of the dust removal pipeline of the primary and secondary winnowing boxes;
step A5: calculating the air volume L of the pipeline according to the average wind speed V and the ventilation area of the dust removal pipeline of the primary and secondary air separation boxes: L3600V F.
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Cited By (1)
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| CN114027543A (en) * | 2021-11-19 | 2022-02-11 | 红云红河烟草(集团)有限责任公司 | Method for accurately controlling rejection rate of stem slivers in stem shred winnowing process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114027543A (en) * | 2021-11-19 | 2022-02-11 | 红云红河烟草(集团)有限责任公司 | Method for accurately controlling rejection rate of stem slivers in stem shred winnowing process |
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Application publication date: 20210727 |