CN211794294U - Plasticizer sprays real-time quantitative online detection subassembly of volume - Google Patents
Plasticizer sprays real-time quantitative online detection subassembly of volume Download PDFInfo
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- CN211794294U CN211794294U CN202020094830.6U CN202020094830U CN211794294U CN 211794294 U CN211794294 U CN 211794294U CN 202020094830 U CN202020094830 U CN 202020094830U CN 211794294 U CN211794294 U CN 211794294U
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Abstract
The utility model provides a real-time quantitative online detection component for plasticizer spraying amount, which comprises a plasticizer storage device, a supply pump, a spraying box, a supply pipeline, a return pipeline, a speed measuring sensor and a breadth measuring sensor; the supply pipeline is provided with a supply flowmeter and/or the supply pump is a supply metering pump; here, it can be broadly understood that: the supply metering may be obtained by a supply flow meter, or may be obtained by setting a supply pump as a supply metering pump; in some embodiments of the present invention, the supply line is provided with a supply flow meter and the supply pump is a supply metering pump, and the detection is performed simultaneously. A backflow flowmeter is arranged on the backflow pipeline; the speed measuring sensor is used for measuring the running speed of the tows; the spread measuring sensor is used for measuring the spread width of the tows.
Description
Technical Field
The utility model relates to a tobacco industry filter rod on-line production, concretely relates to real-time quantitative online detection subassembly of plasticizer spraying volume.
Background
In the tobacco industry at home and abroad, the filter stick forming process is an important component of the whole cigarette manufacturing process. The filter stick mainly comprises the following components: acetate fiber tows, a plasticizer, forming paper and glue. The filter stick process mainly comprises the following steps: opening and adding plasticizer (tow unpacking and positioning, tow extraction, opening, plasticizer addition), forming (tow strip forming, gluing, rolling, lap glue application) and outputting (cutting, conveying, dishing and solidification). The opening link has the following functions and technical tasks: 1) obtaining good opening and providing production yield; 2) stabilizing the stentering; 3) controlling the amount of the tows entering the forming process and conveying the tows to a forming link from a plasticizer device; the plasticizer is added to the filter stick, so that the hardness and the elasticity of the filter stick are improved, the cutting, compounding, twisting and other processing performances of the filter stick are improved, and the sensory requirements of consumers are further met. Therefore, the stability of the process links is one of key nodes of the filter stick process, is the basis of the stability of the physical indexes of the filter stick, and is also the main focus of the tobacco industry on researching the physical indexes of the filter stick and controlling the process of the filter stick.
In the aspect of plasticizer application, in recent years, a plasticizer adding mode device in a forming machine in the tobacco industry at home and abroad is basically updated from an original brush type to a current spraying type, namely a common technical scheme, namely a plasticizer quantitative spraying device (CN 200920068158.7). However, since this control method is an open-loop control and is not a complete closed-loop control, the amount of on-line plasticizer spraying cannot be actually detected quantitatively in real time. For this case, it is still helpful to verify in two ways during the actual production process, method one: an online dry and wet rod sampling measurement method (research and application [ J ] of a cigarette filter rod plasticizer content detection sampling method, China high and new technology enterprises, 2013(05):46-48.) includes the steps of firstly closing a plasticizer spraying system device, taking a 'dry rod' (namely a formed filter rod without a plasticizer), completely removing the dry rods except for sampling in the composition, then opening the plasticizer spraying system device, and taking a 'wet rod'. And dividing the weight of the wet rod and the weight of the dry rod by the count to obtain the average value of the addition amount of a batch of samples, and then using the average value to calibrate the open-loop calibration amount of the device. Obviously, the method has the disadvantages of manual intervention in the process, high waste consumption and possibility of defective products flowing into the next process in the sampling process. The second method is to perform measurement by chromatography, and the experimental mode of the chromatography is as follows: and (3) taking the filter stick after the sampling machine stably operates, tearing and spreading the filter stick after obtaining the filter stick, putting the filter stick into a sealed experimental bag, and putting the experimental bag into a chromatograph for detecting the triacetyl glycerine of the filter stick. The time is approximately: for 15 hours. The chromatography can only be carried out in a laboratory, has long time, has severe requirements on the environment in the detection process, and therefore, the technology (a method for measuring the content of the triacetin in the filter stick based on an LC-MS/MS technology, CN 201810946490.2; a quantitative detection method of the triacetin in the filter stick, CN201910369042.5) cannot be popularized on a machine (namely an online production process). The above principles are generally to be understood, with only a few differences in the materials, methods, and steps of the experiments.
In about 2000 years, the microwave technology began to be applied in the tobacco industry in large quantities, and in countries represented by germany, the first time of microwave application was opened on cigarette making machine equipment. Similarly, in the filter rod forming process stage of cigarette manufacturing, 1 case of plasticizer on-line measurement based on microwave method has been disclosed (CN1635840A), the core principle of the method is to perform the quality of acetate fiber tow without plasticizer and with plasticizer before the first-stage opening and before the final cutting, and then perform the quality per unit length to calculate the difference, which is the quality of fiber tow, but the method is not applied at all in tobacco industry, and there are mainly 3 points: 1) the device measures the quality of a unit length before primary opening and before final cutting, and the method has the core problems that the crimping degrees of the tows of the unit length before the primary opening and before the final cutting are different or can not be consistent all the time (the crimping degree is an important index of the acetate tows, although the method also explains the coordination of the crimping degree through speed, the method is infeasible in practice because the crimping degree is not feedback controlled by a sensor, so that the crimping degrees of the front and the rear can not be consistent in real time, even if the method is used for speed control, the crimping degree is always changed in the actual production process because the crimping degree of the acetate tow bag at the front end is changed), and once the crimping degree of the fiber tows is changed, the front and the rear of the unit length are unequal, the difference is meaningless, and the quality of the plasticizer within the unit length is converted based on the difference, so that the quality is more unreliable, and even counteraction is generated; in other words, the method is designed with the assumed degree of curling constant; 2) the second reason is that, as is well known in the tobacco industry, the use of equipment according to the disclosed method is carried out unless the forming machine is elongated and modified; 3) the method for calculating the difference value by subtracting the two sensors has the advantages that the time lag is large, the time lag is calculated according to the length of about 5 meters of a forming machine, the time lag is about 3 meters of movement distance, the calculation is carried out according to the movement speed of 400 meters/minute of a common KDF2 forming machine, and at least 2 seconds are needed; 4) the price is high, which is not beneficial to application.
However, with the improvement of the requirements of the whole cigarette process index, the requirements on the forming process are increased day by day, so the stability of the plasticizer content of the filter stick produced by a machine station is more and more important.
SUMMERY OF THE UTILITY MODEL
For promoting the high quality development of tobacco industry, to prior art's not enough, combine vision technique and flow measurement technique, the utility model provides a plasticizer sprays real-time quantitative on-line measuring subassembly of volume, and the device can feed back and guide the addition of on-line production process plasticizer better in real time.
The utility model provides a real-time quantitative online detection component for plasticizer spraying amount, which comprises a plasticizer storage device, a supply pump, a spraying box, a supply pipeline, a return pipeline, a speed measuring sensor and a breadth measuring sensor;
a spraying nozzle is arranged above the spraying box, the plasticizer storage device conveys the plasticizer to the spraying nozzle through a supply pump and a supply pipeline, the top end of the spraying box is opened to receive the plasticizer sprayed by the spraying nozzle, and a through spraying area is formed in the spraying box and is used for the transverse penetration of the tows;
one end of the return pipeline is communicated with the bottom of the spraying box, and the other end of the return pipeline is communicated with the plasticizer storage device;
the supply pipeline is provided with a supply flowmeter and/or the supply pump is a supply metering pump; here, it can be broadly understood that: the supply metering may be obtained by a supply flow meter, or may be obtained by setting a supply pump as a supply metering pump; in some embodiments of the present invention, the supply line is provided with a supply flow meter and the supply pump is a supply metering pump, and the detection is performed simultaneously.
A backflow flowmeter is arranged on the backflow pipeline;
the speed measuring sensor is used for measuring the running speed of the tows;
the spread measuring sensor is used for measuring the spread width of the tows.
In some embodiments, the spread measurement sensor is positioned perpendicular to the direction of movement of the tow.
In some embodiments, the speed measuring sensor is parallel to the direction of movement of the tow.
In some embodiments, the supply flow meter and the return flow meter are both E + H mass flow meters 83A.
In some embodiments, the span measuring sensor is a kirschner width gauge.
In some embodiments, the feed metering pump employs a servo-driven pump.
The timing and quantitative detection assembly provided by the utility model can realize real-time measurement, and the feedback speed is faster than that of gas chromatography; the quantitative measurement can be carried out, and the feedback accuracy is higher than that of a manual dry and wet rod method; the plasticizer is not influenced by the change of opening parameters and can be constantly measured in unit length; the time lag is very short, the theoretical minimum time lag being the plasticizer flow time from inlet to outlet, and must generally be less than 1 second.
Therefore, based on the points, the method can be directly used for the online quality control of the actual production process of the filter stick, and the process has no filter stick consumption.
Drawings
FIG. 1 is a schematic structural diagram of a system for real-time quantitative detection of the amount of sprayed plasticizer according to the present invention;
FIG. 2 is a block diagram of the flow chart of the method for real-time quantitative detection of the amount of sprayed plasticizer provided by the present invention;
fig. 3 is a schematic diagram comparing the method provided by the present invention with a wet and dry stick, gas chromatography method.
Detailed Description
For better understanding of the technical solutions and objects of the present invention, the following embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1
The embodiment is selected to be implemented on a KDF2 type filter rod making machine which is most common in the tobacco industry.
Referring to fig. 1, the present embodiment provides a system for real-time and quantitative detection of plasticizer spraying amount, which includes a plasticizer storage device 1, a supply metering pump 2, a spraying tank 14, a supply pipeline, a return pipeline 13, a supply flowmeter 3, a return flowmeter 4, a speed measuring sensor 6 and a span measuring sensor 5;
a spraying nozzle 12 is arranged above the spraying box 14, the plasticizer storage device 1 conveys the plasticizer to the spraying nozzle 12 through a supply metering pump 2 and a supply pipeline, the top end of the spraying box 14 is opened to receive the plasticizer sprayed by the spraying nozzle 12, and a through spraying area is formed in the spraying box 14 for the transverse penetration of the tows;
one end of the return pipeline 13 is communicated with the bottom of the spraying box 14, the other end of the return pipeline is communicated with the plasticizer storage device 1, and a return flow meter 4 is arranged on the return pipeline;
the speed measuring sensor 6 is used for measuring the running speed of the tows;
the spread measuring sensor 5 is used for measuring the spread width of the tows;
in order to ensure better reliability and precision and realize stability guarantee, in the embodiment, the following specific characteristics are adopted:
the plasticizer supply metering pump 2 adopts a servo drive pump to realize accurate metering, the backflow flow meter 4 adopts an E + H mass flow meter 83A, the span measuring sensor 5 of the tows 11 adopts a Ginzhi vision-based width measuring instrument, and the speed measuring sensor 6 of the formed tows 11 can be a linear sensor.
The spread measuring sensor 5 of the tow 11 is a Ginz width measuring instrument and is positioned in the vertical direction of the moving direction of the tow 11;
the linear sensor of the speed measuring sensor 6 of the tow 11 is positioned in the parallel direction of the moving direction of the tow 11.
Wherein, the plasticizer storage device is used for storing the plasticizer, and can be in the form of a storage barrel and the like.
Example 2
The embodiment is selected to be implemented on a KDF2 type filter rod making machine which is most common in the tobacco industry.
Referring to fig. 1, the present embodiment provides a system for real-time and quantitative detection of plasticizer spraying amount, which includes a plasticizer storage device 1, a supply pump 2, a spraying tank 14, a supply pipeline, a return pipeline 13, a supply flowmeter 3, a return flowmeter 4, a speed measuring sensor 6 and a span measuring sensor 5;
a spraying nozzle 12 is arranged above the spraying box 14, the plasticizer storage device 1 conveys the plasticizer to the spraying nozzle 12 through the supply pump 2 and the supply pipeline, the top end of the spraying box 14 is opened to receive the plasticizer sprayed by the spraying nozzle 12, and a through spraying area is formed in the spraying box 14 for the tows to transversely penetrate through;
one end of the return pipeline 13 is communicated with the bottom of the spraying box 14, the other end of the return pipeline is communicated with the plasticizer storage device 1, and the supply pipeline and the return pipeline are respectively provided with a supply flowmeter 3 and a return flowmeter 4;
the speed measuring sensor 6 is used for measuring the running speed of the tows;
the spread measuring sensor 5 is used for measuring the spread width of the tows;
in order to ensure better reliability and precision and realize stability guarantee, in the embodiment, the following specific characteristics are adopted:
the plasticizer supply flow meter 3 may be an E + H mass flow meter 83A, the reflux flow meter 4 may be an E + H mass flow meter 83A, the spread measuring sensor 5 of the tow 11 may be a kenshi vision-based width measuring instrument, and the speed measuring sensor 6 of the molded tow 11 may be a linear sensor.
A supply flow meter 3E + H mass flow meter 83A located after the plasticizer supply pump 2 and before the plasticizer spray nozzle 12;
the supply flowmeter 4E + H mass flowmeter 83A is positioned on the return pipeline 13 of the plasticizer spraying device;
the spread measuring sensor 5 of the tow 11 is a Ginz width measuring instrument and is positioned in the vertical direction of the moving direction of the tow 11;
the linear sensor of the speed measuring sensor 6 of the tow 11 is positioned in the parallel direction of the moving direction of the tow 11.
Example 3
Example 3
The embodiment is selected to be implemented on a KDF2 type filter rod making machine which is most common in the tobacco industry.
Referring to fig. 1, the present embodiment provides a system for real-time and quantitative detection of plasticizer spraying amount, which includes a plasticizer storage device 1, a supply metering pump 2, a spraying tank 14, a supply pipeline, a return pipeline 13, a supply flowmeter 3, a return flowmeter 4, a speed measuring sensor 6 and a span measuring sensor 5;
a spraying nozzle 12 is arranged above the spraying box 14, the plasticizer storage device 1 conveys the plasticizer to the spraying nozzle 12 through a supply metering pump 2 and a supply pipeline, the top end of the spraying box 14 is opened to receive the plasticizer sprayed by the spraying nozzle 12, and a through spraying area is formed in the spraying box 14 for the transverse penetration of the tows;
one end of the return pipeline 13 is communicated with the bottom of the spraying tank 14, the other end of the return pipeline is communicated with the plasticizer storage device 1, and the supply pipeline and the return pipeline are respectively provided with a supply flowmeter 3 and a return metering gauge 4;
the speed measuring sensor 6 is used for measuring the running speed of the tows;
the spread measuring sensor 5 is used for measuring the spread width of the tows;
in order to ensure better reliability and precision and realize stability guarantee, in the embodiment, the following specific characteristics are adopted:
the plasticizer supply metering pump 2 adopts a servo drive pump to realize accurate metering, the plasticizer supply pipeline flowmeter 3 adopts an E + H mass flowmeter 83A, the plasticizer return pipeline sensor 4 adopts an E + H mass flowmeter 83A, the span measuring sensor 5 of the tows 11 adopts a Ginzhi vision-based width measuring instrument, and the speed measuring sensor 6 of the formed tows 11 can be a linear sensor.
A plasticizer supply flow meter 3E + H mass flow meter 83A located after the servo drive pump of the plasticizer supply metering pump 2 and before the plasticizer spray nozzle 12;
the backflow meter 4E + H mass flow meter 83A is positioned on the plasticizer backflow pipeline 13;
the spread measuring sensor 5 of the tow 11 is a Ginz width measuring instrument and is positioned in the vertical direction of the moving direction of the tow 11;
the linear sensor of the speed measuring sensor 6 of the tow 11 is positioned in the parallel direction of the moving direction of the tow 11.
Example 4
Based on the system provided by embodiment 1, 2 or 3, referring to fig. 2, this embodiment provides a method for quantitatively detecting the spraying amount of a plasticizer in real time in the on-line production process of a filter stick, and the method includes the following steps:
step 1: the plasticizer storage device 1 is preheated, the production is started,the plasticizer supply metering pump servo drive pump 2 is opened according to the initial metering value, and the flow begins to be metered; or obtaining the supply flow rate value s based on the detection of the reflux flowmeter1；
Step 2: the equipment is started, the tows 11 enter a plasticizer spraying area 14, and a speed measuring sensor 6 measures the running speed v of the tows 11;
and step 3: the spread measuring sensor 5 measures the spread width d of the tow 11;
and 4, step 4: the plasticizer returns to the plasticizer storage device 1 through the return hole 13 and the plasticizer return line sensor 4, and a return flow value s is obtained in the process2；
And 5: the data of all the above sensors per unit time t are captured, and the amount of spraying s of the plasticizer per unit area per unit time is calculated from the following modelavg。
savg＝(s1-s2)/(v*t)*d
In this example, s1＝2930mg，s2＝431mg，v＝670(cm/s),t＝1(s),d＝16cmm
Desavg＝(2930-431)/670*16
savg＝0.233(mg/cm2)
Of course, the plasticizer content of a single filter stick in 12cm may be calculated to be about 44.76mg within 1 second per unit time in the present embodiment.
In order to make the technical staff in the industry understand the utility model better, the time interval t in this embodiment is selected to be 1 second, actually 0.1 second, or 0.2 second, etc., and then converted into a single filter stick based on the product of the speed and the time, which are all feasible, and the real-time performance is strong, and the control detection time lag is at most one time interval t. And since the measurement here is after opening, it is obvious that the spraying amount per unit area is independent of the curling degree because it is in the process section after opening of the forming machine.
To verify the practicability of the method, please refer to fig. 3, we sample 10 times at different time points, and record the detection value of the method during the 10 times, and then compare the data sampled by the gas chromatography and the online dry-wet rod sampling method at the 10 time points, which cannot be compared; the measurement device and method based on CN1635840A have no application case in the domestic tobacco industry, and comparison cannot be carried out, and the results are shown in Table 1:
TABLE 1
As can be seen from fig. 3, the deviation of the designed method of the present invention is significantly less than the wet-dry stick comparison method compared to the most accurate gas chromatography.
To this end, the explanation of one unit time of the present embodiment is completed, and then, such calculation may be performed every 1 second, and the plasticizer spraying amount may be measured on-line in real time.
As can be seen from the figure, the method has absolute precision advantage compared with the dry and wet rod sampling method, has obvious time progress advantage for gas chromatography (which is taken as an off-line inspection standard), has small deviation degree, only has a difference of 1.36mg at most, and realizes real-time quantitative detection.
According to the process of the embodiment, the plasticizer applying device can be implemented only by installing the inlet flowmeter, the outlet flowmeter and the span width detector, so that technical personnel in the industry can understand the technical scheme conveniently, and the plasticizer applying device has high popularization and application values for the industry.
Claims (6)
1. The real-time quantitative online detection assembly for the spraying amount of the plasticizer is characterized by comprising a plasticizer storage device (1), a supply pump (2), a spraying box (14), a supply pipeline, a return pipeline (13), a speed measuring sensor (6) and a span measuring sensor (5);
a spraying nozzle (12) is arranged above the spraying box (14), the plasticizer storage device (1) conveys the plasticizer to the spraying nozzle (12) through a supply pump (2) and a supply pipeline, the top end of the spraying box (14) is opened to receive the plasticizer sprayed by the spraying nozzle (12), and a through spraying area is formed in the spraying box (14) for the transverse penetration of the tows (11);
one end of the return pipeline (13) is communicated and connected with the bottom of the spraying box (14) and the other end is communicated with the plasticizer storage device (1),
the supply pipeline is provided with a supply flowmeter (3) and/or the supply pump (2) is a supply metering pump;
a backflow flowmeter is arranged on the backflow pipeline;
the speed measuring sensor is used for measuring the running speed of the tows;
the spread measuring sensor is used for measuring the spread width of the tows.
2. The plasticizer spray amount real-time quantitative on-line detecting assembly according to claim 1, wherein said spread measuring sensor (5) is disposed perpendicular to the direction of movement of the tow.
3. The plasticizer spray amount real-time quantitative on-line detecting assembly as claimed in claim 1, wherein said speed measuring sensor is located parallel to the direction of movement of the tow.
4. The real-time quantitative online detection assembly for the spraying amount of the plasticizer according to claim 1, wherein the supply flow meter and the return flow meter are both 4E + H mass flow meters 83A.
5. The assembly as claimed in claim 1, wherein the span measuring sensor is a Ginz width measuring device.
6. The plasticizer spray amount real-time quantitative online detection assembly according to claim 1, wherein the supply metering pump employs a servo-driven pump.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113933433A (en) * | 2021-10-25 | 2022-01-14 | 浙江中烟工业有限责任公司 | Verification method for filter stick plasticizer applying system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113933433A (en) * | 2021-10-25 | 2022-01-14 | 浙江中烟工业有限责任公司 | Verification method for filter stick plasticizer applying system |
| CN113933433B (en) * | 2021-10-25 | 2024-05-17 | 浙江中烟工业有限责任公司 | Verification method for filter rod plasticizer application system |
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