A method for compensating flavoring flow in cigarette production process

Abstract

The present invention discloses a method for compensating a flavoring flow rate in a cigarette production process, which belongs to the technical field of cigarette production, and includes: using a flavoring buffer tank equipped with a weighing module to monitor the actual flavoring flow rate in real time, and continuously recording the actual weight value of the flavor in the flavoring buffer tank; setting a theoretical flavoring flow rate, and continuously comparing the actual flavoring flow rate monitored in real time with the theoretical flavoring flow rate to obtain a flavoring flow rate deviation value; judging whether the flavoring flow rate deviation value reaches a deviation threshold value, and if so, correcting the actual flavoring flow rate according to the set compensation flow rate. The present invention can adjust the gear pump speed according to the flow rate deviation value, and realizes dynamic and precise control of the flavoring flow rate.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarette production, and more specifically, to a flavoring flow compensation method in a cigarette production process. Background Art

[0002] In the production of heated cigarettes, the rolling and joining processes usually cover the following two types: one is the disordered heating cigarette processing process. This process first processes various types of smoking materials, such as tobacco, thin sheets or other applicable materials into filaments, and then uses traditional flavoring machines to perform flavoring operations, and stores them after the flavoring is completed. In the rolling and joining process, the modified traditional cigarette machine is used to carry out the operation, so as to produce heated cigarettes with different styles and flavors. Under this process system, the flavoring mode adopts a centralized flavoring method. The second is the orderly heating cigarette processing process. This process requires the smoking material to be rewound into a reel shape first. In the actual production process, it goes through a series of fine processes such as unwinding, flattening, pressing and cutting, flavoring, bundling, cigarette paper wrapping, cigarette cutting and overlapping, and then produces heated cigarettes with different characteristics. Compared with the disordered heating cigarette processing process, there are many significant differences between the orderly heating cigarette processing process and the traditional cigarette processing process. For this reason, orderly heated cigarettes have become the key research direction in the current industry in many areas such as smoke material formulation technology, processing technology, quality control, flavoring technology, rolling equipment, and film base machine adaptability.

[0003] Especially for the sequential heating cigarette flavoring process, the current industry generally adopts the practice of applying flavoring after the slitting process in the unwinding and rolling process of the smoking material is completed and before the closing process begins. However, in the actual production practice, a prominent problem is exposed, that is, the flavoring accuracy is poor, and the instantaneous error often exceeds 10%. This problem has a direct negative impact on the unique style shaping and quality level assurance of the product. In-depth exploration of its main causes mainly focuses on the following two aspects:

[0004] On the one hand, the flavoring system uses the weight loss method in the flow measurement link. Specifically, in the production process, the gear pump is used to extract the liquid from the barrel for the flavoring operation, and the monitoring of the flavoring flow is to measure and characterize the dynamic changes in the weight of the fragrance liquid in the flavoring barrel through the weighing module. In this process, many factors such as the speed of the gear pump, the viscosity of the liquid itself, and the output pressure of the gear pump will cause different degrees of interference to the flavoring accuracy.

[0005] On the other hand, the fragrance addition during the unwinding and winding process belongs to the category of micro-flow fragrance addition. Its fragrance flow rate will change with the change of vehicle speed, and there is an obvious lag in the fragrance flow rate when tracking the change of vehicle speed. This lag will also have an adverse effect on the fragrance addition accuracy. Summary of the invention

[0006] An object of the present invention is to provide a method for compensating the flavoring flow rate in the cigarette production process, so as to solve the aforementioned problems of low flavoring accuracy, large instantaneous error, and inability to correct the flavoring flow rate.

[0007] According to a first aspect of the present invention, there is provided a method for compensating flavoring flow in a cigarette production process, comprising:

[0008] Real-time monitoring of actual aromatization flow;

[0009] Set the theoretical aromatherapy flow rate, continuously compare the actual aromatherapy flow rate monitored in real time with the theoretical aromatherapy flow rate, and obtain the aromatherapy flow rate deviation value;

[0010] Determine whether the flavoring flow deviation value reaches the deviation threshold, and if so, correct the actual flavoring flow according to the set compensation flow.

[0011] Optionally, a fragrance buffer tank equipped with a weighing module is used to monitor the actual fragrance flow in real time, and the actual weight value of the fragrance in the fragrance buffer tank is continuously recorded.

[0012] Optionally, the weighing module adopts a strain gauge sensor or a capacitive sensor, and the weighing module is connected to the bottom of the spice buffer tank through a mounting bracket.

[0013] Optionally, the actual fragrance flow rate is corrected according to the set compensation flow rate by adjusting the gear pump rotation speed.

[0014] Optionally, the actual aromatizing flow rate is corrected according to the set compensation flow rate by adjusting the gear pump speed, including:

[0015] When it is detected that the actual fragrance flow rate is lower than the theoretical fragrance flow rate, the speed of the gear pump is controlled to increase, thereby increasing the output of fragrance per unit time;

[0016] If it is detected that the actual fragrance flow rate is higher than the theoretical fragrance flow rate, the speed of the gear pump is reduced to reduce the output of the fragrance per unit time.

[0017] Optionally, the calculation of setting the compensation flow is achieved by the following sub-steps:

[0018] Calculate the appropriate flow rate L 瞬时 :

[0019] L 瞬时 = |;

[0020] Where L 瞬时 is the appropriate flow rate, unit, g / min; G i G is the weight of the spice in the spice buffer tank detected by the weighing module at a certain moment; i-1is the weight of the spice in the spice buffer tank detected by the weighing module at the last moment; t is the time interval between two weighings.

[0021] Calculate the instantaneous fragrance accuracy K:

[0022] K= |;

[0023] Where K is the fragrance accuracy, unit is %; L 瞬时 is the timely flow rate; L is the theoretical fragrance flow rate;

[0024] Perform flow compensation: when K ≤ the set accuracy threshold, the system does not make compensation. When K ≥ the set accuracy threshold, the system continuously detects K. When the K value is detected to be ≥ the set accuracy threshold for 30 consecutive seconds, the system starts flow compensation, adjusts the gear pump speed, and changes the output flow until the theoretical fragrance flow is reached. The compensation ends and the cycle continues.

[0025] Optionally, the set accuracy threshold is configured to be 0.5%.

[0026] Optionally, the theoretical flavoring flow rate is adjusted according to set characteristics of different cigarette products, and the set characteristics include: tobacco grade, flavor formula, aroma style, flavoring method and production speed.

[0027] Optionally, the actual fragrance flow, theoretical fragrance flow, fragrance accuracy, and gear pump speed information are displayed visually, and an audible and visual alarm is issued when the fragrance flow deviation exceeds a preset value, or the weighing module fails, or the gear pump body is abnormal.

[0028] The aroma flow compensation method in the cigarette production process disclosed in the present invention has the following technical effects:

[0029] Real-time monitoring of the actual flavoring flow rate and comparison with the theoretical flavoring flow rate can keep track of the difference between the actual flavoring situation and the ideal state. Through this continuous comparison, even the slightest flow deviation can be discovered in time to ensure that the amount of flavoring added to each cigarette is as close to the preset standard as possible.

[0030] The gear pump speed is adjusted according to the flow deviation value to achieve dynamic and precise control of the flavoring flow. When the actual flavoring flow is found to be lower than the theoretical value, the gear pump speed is immediately increased to quickly replenish the insufficient amount of flavors and avoid the weak aroma of cigarettes due to insufficient flavoring; on the contrary, if the flow is too high, reducing the speed can prevent the waste of flavors and excessive aroma. This flexible adjustment method based on real-time needs greatly improves the efficiency of the flavoring process and reduces the production of defective products.

[0031] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0033] Figure 1 A schematic flow chart of a method for compensating flavoring flow in a cigarette production process provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0034] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0035] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0036] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0037] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0038] The present invention proposes an embodiment of a method for compensating the flavoring flow rate in a cigarette production process. Specifically, Figure 1 shown, including:

[0039] Real-time monitoring of actual aromatization flow;

[0040] In the embodiment of the present invention, the actual aromatherapy flow rate is monitored in real time by using a fragrance buffer tank equipped with a weighing module, and the actual weight value of the fragrance in the fragrance buffer tank is continuously recorded. The fragrance buffer tank is provided with a flow guide structure and a buffer area to ensure that the fragrance is evenly distributed in the fragrance buffer tank, and avoid measurement errors caused by accumulation, uneven flow, etc.

[0041] In an embodiment of the present invention, the weighing module adopts a strain gauge sensor or a capacitive sensor, and the weighing module is connected to the bottom of the flavor buffer tank through a mounting bracket. The mounting bracket is made of a high-strength composite material with shock-absorbing, noise-reducing and corrosion-resistant properties, such as a carbon fiber reinforced composite material with a rubber shock-absorbing element.

[0042] Set the theoretical aromatherapy flow rate, continuously compare the actual aromatherapy flow rate monitored in real time with the theoretical aromatherapy flow rate, and obtain the aromatherapy flow rate deviation value;

[0043] The setting of the theoretical flavoring flow rate is based on a large number of scientific experiments and analysis of the characteristics of different cigarette products. For example, the ideal theoretical flavoring amount for each cigarette is determined to be about 0.05 ml. At the same time, considering the speed of the production line (assuming that the production line produces 800 cigarettes per minute), the theoretical flavoring flow rate is set to 40 ml / minute.

[0044] It is determined whether the deviation value of the fragrance flow rate reaches the deviation threshold value. If yes, the actual fragrance flow rate is corrected according to the set compensation flow rate. If not, the actual fragrance flow rate is continuously compared with the theoretical fragrance flow rate.

[0045] It should be noted that the aroma flow compensation method of the present invention constructs a closed-loop control system through real-time monitoring, precise comparison and dynamic adjustment. The actual aroma flow monitored in real time is continuously compared with the theoretical aroma flow, which can quickly and accurately obtain the aroma flow deviation value, and timely detect any slight deviation in the aroma process. The precise monitoring and comparison mechanism can ensure that the amount of aroma added to each cigarette is almost the same, maintaining the stable quality of the product aroma.

[0046] In an embodiment of the present invention, the actual aromatizing flow rate is corrected according to the set compensation flow rate by adjusting the gear pump speed; specifically including:

[0047] When it is detected that the actual fragrance flow rate is lower than the theoretical fragrance flow rate, the speed of the gear pump is controlled to increase, thereby increasing the output of fragrance per unit time;

[0048] If it is detected that the actual fragrance flow rate is higher than the theoretical fragrance flow rate, the speed of the gear pump is reduced to reduce the output of the fragrance per unit time.

[0049] It should be noted that once the gear pump receives a speed-up signal, its intelligent speed control device will start quickly, and accurately calculate the required speed increase based on the built-in algorithm and the specific value of the flow deviation. For example, if the theoretical perfuming flow rate is 50 ml per minute, and the actual monitored flow rate is only 48 ml, it is judged that the gear pump speed needs to be increased by 10%. Assuming the original speed is 800 rpm, the speed control device will quickly and smoothly increase the speed to 880 rpm, so that the output of the fragrance per unit time can be increased, and the flow gap can be made up in time. Once it is found that the actual perfuming flow rate exceeds the theoretical value, the speed control system will intervene immediately. Through calculation, if the original gear pump speed is 900 rpm, it needs to be reduced by 8% according to the flow deviation. The speed control device will accurately adjust the speed to 828 rpm to reduce the output of the fragrance per unit time.

[0050] In an embodiment of the present invention, the calculation of setting the compensation flow is implemented by the following sub-steps:

[0051] Calculate the appropriate flow rate L 瞬时 :

[0052] L 瞬时 = |;

[0053] Where L 瞬时 is the appropriate flow rate, unit, g / min; G i G is the weight of the spice in the spice buffer tank detected by the weighing module at a certain moment; i-1 is the weight of the spice in the spice buffer tank detected by the weighing module at the last moment; t is the time interval between two weighings.

[0054] It should be noted that G i and G i-1 Subtracting the two, the difference is the amount of spices reduced in the time interval, which directly reflects the actual mass of spices flowing out in the preset time. Dividing it by the time interval and taking the absolute value, we get the average mass of spices flowing out per unit time, that is, the timely flow rate. The timely flow rate can reflect the outflow rate of spices at each moment in the process of adding spices in real time, providing a key data basis for subsequent judgment of whether the adding spices is accurate.

[0055] Calculate the instantaneous fragrance accuracy K:

[0056] K= |;

[0057] Where K is the fragrance accuracy, unit is %; L 瞬时 is the appropriate flow rate; L is the theoretical fragrance flow rate; subtract the theoretical flow rate from the appropriate flow rate to get the difference between the two. This difference reflects the degree of deviation between the actual fragrance flow rate and the ideal value. Then divide it by the theoretical flow rate and multiply it by 100%. The fragrance accuracy obtained by taking the absolute value clearly presents the current fragrance accuracy in the form of a percentage. For example, if the value is very small, it means that the actual fragrance flow rate is very close to the theoretical flow rate and the fragrance accuracy is high; on the contrary, if the value is large, it means that there is a large deviation in the actual fragrance process and adjustment is required.

[0058] Flow compensation: When K≤set accuracy threshold, the system does not make compensation, because within this accuracy range, the deviation between the actual flavoring flow and the theoretical flow is extremely small, and the impact on the aroma quality of cigarette products can be ignored. At this time, the existing flavoring state can be maintained, avoiding unnecessary frequent adjustments and ensuring the stability of production. When K≥set accuracy threshold, the system continuously detects K for 30 seconds. Because in the production process, an occasional large deviation may be caused by short-term interference factors, such as the instantaneous jitter of the weighing module, the slight fluctuation of the pressure in the pipeline, etc., which does not necessarily require immediate adjustment. When the K value is detected to be ≥set accuracy threshold for 30 consecutive seconds, the system turns on flow compensation, adjusts the gear pump speed, changes the output flow, until the theoretical flavoring flow is reached, and the compensation ends. Then the system returns to the normal monitoring state, and calculates the flavoring accuracy again based on the timely flow and theoretical flow. The cycle can continuously ensure the flavoring accuracy in the cigarette production process, ensure that each cigarette can obtain uniform and accurate flavoring, and improve the overall quality of the product. Among them, the gear pump is a key component for conveying flavors in the flavoring system, and the change in speed directly affects the output of the flavor.

[0059] In the embodiment of the present invention, the set accuracy threshold is configured to be 0.5%. When it is necessary to explain, the set accuracy threshold is configured to be 0.5%, which can ensure that the flavoring accuracy of the cigarette product meets the high quality requirements while taking into account production efficiency and cost control.

[0060] In an embodiment of the present invention, the theoretical flavoring flow rate is adjusted according to set characteristics of different cigarette products, and the set characteristics include: tobacco grade, flavor formula, aroma style, flavoring method and production speed.

[0061] In an embodiment of the present invention, the actual flavoring flow, theoretical flavoring flow, flavoring accuracy, and gear pump speed information are visualized, and an audible and visual alarm is issued when the flavoring flow deviation exceeds a preset value, or the weighing module fails, or the gear pump body is abnormal. It should be noted that a liquid crystal display screen is used to present various key data in a visual form. Taking the actual flavoring flow as an example, its dynamic curve can accurately reflect the flow rate changes of the spices at every moment. When the production line encounters a situation such as the gradual narrowing of the pipeline due to the accumulation of impurities, the flow curve will show a slow downward trend, and the operator can predict the possible problem of insufficient flavoring in advance; on the contrary, after adjusting the gear pump speed to compensate for the flow, the curve will rise rapidly, intuitively showing the adjustment effect, allowing the operator to immediately confirm the effectiveness of the operation.

[0062] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings, but the above is only a preferred embodiment of the present invention. It should be noted that the technical features involved in the above embodiments and their preferred methods can be reasonably combined and matched into a variety of equivalent schemes by those skilled in the art without departing from or changing the design ideas and technical effects of the present invention; therefore, the present invention is not limited to the scope of implementation shown in the drawings, and all changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the specification and drawings, should be within the protection scope of the present invention.

Claims

1. A method for compensating flavoring flow in a cigarette production process, characterized in that: include: Real-time monitoring of actual aromatization flow; Set the theoretical aromatherapy flow rate, continuously compare the actual aromatherapy flow rate monitored in real time with the theoretical aromatherapy flow rate, and obtain the aromatherapy flow rate deviation value; Determine whether the flavoring flow deviation value reaches the deviation threshold, and if so, correct the actual flavoring flow according to the set compensation flow.

2. The method for compensating flavoring flow in a cigarette production process according to claim 1, characterized in that: The actual flavoring flow rate is monitored in real time using a flavor buffer tank equipped with a weighing module, and the actual weight value of the flavor in the flavor buffer tank is continuously recorded.

3. The method for compensating flavoring flow in a cigarette production process according to claim 2, characterized in that: The weighing module adopts a strain gauge sensor or a capacitive sensor, and the weighing module is connected to the bottom of the spice buffer tank through a mounting bracket.

4. The method for compensating flavoring flow in a cigarette production process according to claim 1, characterized in that: The actual fragrance flow is corrected according to the set compensation flow by adjusting the gear pump speed.

5. The method for compensating flavoring flow in a cigarette production process according to claim 4, characterized in that: By adjusting the gear pump speed, the actual aromatherapy flow rate is corrected according to the set compensation flow rate, including: When it is detected that the actual fragrance flow rate is lower than the theoretical fragrance flow rate, the speed of the gear pump is controlled to increase, thereby increasing the output of fragrance per unit time; If it is detected that the actual fragrance flow rate is higher than the theoretical fragrance flow rate, the speed of the gear pump is reduced to reduce the output of the fragrance per unit time.

6. The method for compensating flavoring flow in a cigarette production process according to claim 5, characterized in that: The calculation of setting the compensation flow is achieved through the following sub-steps: Calculate the appropriate flow rate L 瞬时 : L 瞬时 = |； Where L 瞬时 is the appropriate flow rate, unit, g / min; G i G is the weight of the spice in the spice buffer tank detected by the weighing module at a certain moment; i-1 is the weight of the spice in the spice buffer tank detected by the weighing module at the last moment; t is the time interval between two weighings; Calculate the instantaneous fragrance accuracy K: K= |； Where K is the fragrance accuracy, unit is %; L 瞬时 is the timely flow rate; L is the theoretical fragrance flow rate; Perform flow compensation: when K ≤ the set accuracy threshold, the system does not make compensation. When K ≥ the set accuracy threshold, the system continuously detects K. When the K value is detected to be ≥ the set accuracy threshold for 30 consecutive seconds, the system starts flow compensation, adjusts the gear pump speed, and changes the output flow until the theoretical fragrance flow is reached. The compensation ends and the cycle continues.

7. The method for compensating flavoring flow in a cigarette production process according to claim 6, characterized in that: The set accuracy threshold is configured to be 0.5%.

8. The method for compensating flavoring flow in a cigarette production process according to claim 1, characterized in that: The theoretical flavoring flow rate is adjusted according to the set characteristics of different cigarette products, and the set characteristics include: tobacco grade, flavor formula, aroma style, flavoring method and production speed.

9. The method for compensating flavoring flow in a cigarette production process according to any one of claims 1 to 8, characterized in that: The actual fragrance flow, theoretical fragrance flow, fragrance accuracy, and gear pump speed information are displayed visually, and sound and light alarms are given when the fragrance flow deviation exceeds the preset value, or the weighing module fails, or the gear pump body is abnormal.

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