An automatic purging system and a control method thereof

Abstract

The application discloses an automatic blowing system and a control method thereof. The automatic blowing system comprises a distribution vehicle blowing execution unit, a cloth vehicle blowing execution unit, an air path group and a control unit. The distribution vehicle blowing execution unit comprises at least one group of air knives, and the air knives in the same group are symmetrically arranged on the baffles on the two sides of the distribution vehicle. The cloth vehicle blowing execution unit comprises at least one group of nozzles, and the nozzles in the same group are symmetrically arranged on the supports on the two sides of the cloth vehicle. The air path group comprises an air source, an air path, an air knife electromagnetic valve and a nozzle electromagnetic valve. The air path is used for connecting the air source and the air knife and connecting the air source and the nozzle. The air knife electromagnetic valve is arranged on the air path between the air source and the air knife. The nozzle electromagnetic valve is arranged on the air path between the air source and the nozzle. The technical scheme of the application avoids the problems of high-altitude operation risk, low efficiency and mixed brand hidden danger existing in manual cleaning, and realizes automatic cleaning of the whole process, no dead angle and intrinsic safety.

Description

Technical Field

[0001] This invention relates to the field of tobacco production technology, and in particular to an automatic purging system and its control method. Background Technology

[0002] In the tobacco processing industry, storage cabinets are key equipment for material storage and batching. Their material distribution system typically consists of two parts: a distribution cart and a material distribution cart. The distribution cart moves laterally to distribute materials to different storage cabinets; the material distribution cart moves back and forth along the track on top of the cabinet to ensure uniform distribution of materials within the cabinet.

[0003] In actual production, as the distribution cart moves laterally and the material distribution cart moves longitudinally, due to mechanical limitations and material inertia, some residual material accumulates on the edge-pressing strips on both sides of the distribution cart and the material distribution cart. After each loading into the container, the distribution of residual material shows a clear pattern—it is almost entirely concentrated on the edge-pressing strips on both sides.

[0004] Current technologies generally employ manual cleaning: after the equipment is shut down, operators, wearing safety gear, climb from the platform to the 5-meter-high distribution and fabric carts, and use brooms or compressed air hoses for cleaning. This method has the following prominent problems: High safety risks: It involves working at heights, which carries the risk of falling and makes it impossible to achieve inherent safety.

[0005] Inefficiency: The manual cleaning process is cumbersome, and a single maintenance change takes as long as 8-10 minutes, which leads to prolonged equipment downtime / batch change time, becomes a bottleneck in production, and increases energy consumption.

[0006] Significant quality risks: Inadequate or untimely cleaning can lead to residual materials being mixed into subsequent batches, causing changes in the formula structure and affecting product quality. Summary of the Invention

[0007] This invention provides an automatic purging system and its control method, which solves the problems of high-altitude operation risks, low efficiency, and potential mix-up hazards in manual purging, and realizes automatic purging.

[0008] According to one aspect of the present invention, an automatic purging system is provided, comprising: a purging execution unit for a distribution vehicle, a purging execution unit for a fabric distribution vehicle, an air circuit assembly, and a control unit; The purging execution unit of the distribution vehicle includes at least one set of air knives, which are symmetrically arranged on the baffles on both sides of the distribution vehicle. The fabric carrier blowing execution unit includes at least one set of nozzles, which are symmetrically arranged on the brackets on both sides of the fabric carrier. The air circuit assembly includes an air source, an air circuit, an air knife solenoid valve, and a nozzle solenoid valve; the air circuit is used to connect the air source and the air knife, and to connect the air source and the nozzle; the air knife solenoid valve is used to be installed on the air circuit between the air source and the air knife; the nozzle solenoid valve is used to be installed on the air circuit between the air source and the nozzle. The control unit is electrically connected to the air knife solenoid valve and the nozzle solenoid valve respectively. When the material receiving end signal is received, it is used to obtain the basic parameters of the tobacco leaves and control the working mode of the air knife solenoid valve and the nozzle solenoid valve respectively according to the basic parameters of the tobacco leaves.

[0009] Optionally, the width of the air curtain of the air knife is greater than or equal to the width of the pressure strip of the distribution vehicle.

[0010] Optionally, the nozzle includes a universal adjustment bracket and a spray head; The nozzle is rotatably connected to the universal adjustment bracket; Each universal adjustment bracket includes two nozzles; one nozzle's spray range covers the inside of the baffle, and the other nozzle's spray range covers the outside of the baffle.

[0011] Optionally, the air circuit assembly may also include an air pressure regulating unit; The air pressure regulating unit is located between the air source and the air knife, and also in the air path between the air source and the nozzle; The control unit is connected in communication with the air pressure regulating unit and is also used to output an air pressure regulating signal to the air pressure regulating unit according to the basic parameters of the tobacco leaves in order to regulate the air pressure in the air circuit.

[0012] According to another aspect of the present invention, a control method for an automatic purging system is provided, which is applied in an automatic purging system; Control methods include: Upon receiving the material arrival end signal, acquire the basic parameters of the tobacco leaves; The operating modes of the air knife solenoid valve and the nozzle solenoid valve are controlled according to the basic parameters of the tobacco leaves.

[0013] Optionally, the operating modes of the air knife solenoid valve and the nozzle solenoid valve can be controlled separately according to the basic parameters of the tobacco leaves, including: The first purging time of the air knife and the second purging time of the nozzle are determined based on the basic parameters of the tobacco leaves. Control the first purging duration of the air knife activation; Control the nozzle to open for the second purging duration.

[0014] Optionally, the air circuit assembly may also include an air pressure regulating unit; The operating modes of the air knife solenoid valve and the nozzle solenoid valve are controlled according to the basic parameters of the tobacco leaves, including: The first purging pressure of the air knife and the second purging pressure of the nozzle are determined based on the basic parameters of the tobacco leaves. The air pressure regulation unit controls the air path between the air knife and the air source to the first purging pressure; The control air pressure regulating unit adjusts the air path between the nozzle and the air source to the second purging pressure.

[0015] Optional basic parameters for tobacco leaves include tobacco leaf moisture content and tobacco leaf morphology; The operating modes of the air knife solenoid valve and nozzle solenoid valve are controlled according to the tobacco leaf moisture content and tobacco leaf shape.

[0016] Optionally, upon receiving the material arrival end signal, basic parameters of the tobacco leaves are acquired, including: Upon receiving the material arrival end signal, read the material flow rate signal; When the material flow signal is zero and a preset delay time is maintained, the basic parameters of the tobacco leaves are obtained.

[0017] Optionally, after controlling the operating modes of the air knife solenoid valve and the nozzle solenoid valve according to the basic parameters of the tobacco leaves, the following additional features are also included: When the number of purging cycles is less than the preset number, the air knife solenoid valve continues to be controlled for purging, and the nozzle solenoid valve continues to be controlled for purging.

[0018] The technical solution of this invention avoids the problems of high-altitude operation risks, low efficiency, and mixed-sign hazards associated with manual cleaning, and solves the problem that existing automatic cleaning devices cannot simultaneously cover the distribution vehicle and the material distribution vehicle, thus achieving full-process, no-dead-angle, and inherently safe automatic cleaning.

[0019] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is an installation schematic diagram of a distribution vehicle purging execution unit according to an embodiment of the present invention; Figure 2 This is an installation diagram of a fabric cart purging execution unit according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a fabric cart blowing execution unit according to an embodiment of the present invention; Figure 4This is an electrical connection diagram of an automatic purging system according to an embodiment of the present invention; Figure 5 This is a flowchart of a control method for a first automatic purging system provided according to an embodiment of the present invention; Figure 6 This is a flowchart of a control method for a second automatic purging system provided according to an embodiment of the present invention; Figure 7 This is a flowchart of a control method for a third automatic purging system provided according to an embodiment of the present invention; Figure 8 This is a flowchart of a control method for a fourth automatic purging system provided according to an embodiment of the present invention; Figure 9 This is a flowchart of a control method for a fifth automatic purging system provided according to an embodiment of the present invention; Figure 10 This is a flowchart of a control method for a sixth type of automatic purging system provided according to an embodiment of the present invention. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0024] Figure 1 This is an installation diagram of a distribution vehicle purging execution unit according to an embodiment of the present invention. Figure 2 This is an installation diagram of a fabric cart blowing execution unit according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure of a fabric cart blowing execution unit according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the electrical connections of an automatic purging system according to an embodiment of the present invention. Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the automatic purging system includes: The distribution vehicle purging execution unit 1, the fabric carrier purging execution unit 2, the air circuit group 3, and the control unit 4; The distribution vehicle purging execution unit 1 includes at least one set of air blades 10, which are symmetrically arranged on the baffles on both sides of the distribution vehicle 51. The fabric carrier blowing execution unit 2 includes at least one set of nozzles 11, which are symmetrically arranged on the brackets on both sides of the fabric carrier 52. The air path assembly 3 includes an air source 31, an air path 32, an air knife solenoid valve 33, and a nozzle solenoid valve 34; the air path 32 is used to connect the air source 31 and the air knife 10, and to connect the air source 31 and the nozzle 11; the air knife solenoid valve 33 is used to be installed on the air path 32 between the air source 31 and the air knife 10; the nozzle solenoid valve 34 is used to be installed on the air path 32 between the air source 31 and the nozzle 11. The control unit 4 is electrically connected to the air knife solenoid valve 33 and the nozzle solenoid valve 34 respectively. When the material receiving end signal is received, the control unit 4 acquires the basic parameters of the tobacco leaves and controls the working mode of the air knife solenoid valve 33 and the nozzle solenoid valve 34 respectively according to the basic parameters of the tobacco leaves.

[0025] The distribution vehicle purging execution unit 1 can purge the material on the distribution vehicle 51. The distribution vehicle purging execution unit 1 includes at least one set of air knives 10, and each set includes at least two symmetrically arranged air knives 10. The distribution vehicle 51 includes baffles on both sides, and the air knives 10 of the same set are symmetrically arranged on the baffles on both sides and located inside the baffles. This allows the residual material on the pressing belts 6 on both sides of the distribution vehicle 51 to be accurately blown onto the surface of the conveyor belt of the distribution vehicle 51, and then the residual material is transported to the fabric storage by the conveyor belt.

[0026] The material carrier blowing execution unit 2 is used to blow away the material on the material carrier 52. The material carrier blowing execution unit 2 includes at least one set of nozzles 11, which can be used to spray gas. The nozzles 11 in the same set are symmetrically arranged on supports on both sides of the material carrier 52, and these supports can be suspended supports above the material carrier 52 body. Because the nozzles 11 are symmetrically arranged above the supports of the material carrier 52, the nozzles 11 can blow away the material at the edge of the material carrier 52, accurately blowing the residual material on the edge-pressing belt 6 of the material carrier 52 onto the surface of the conveyor belt.

[0027] The gas path assembly 3 is used to supply gas to the air knife 10 and the nozzle 11. The gas path assembly 3 includes an air source 31, an air path 32, an air knife solenoid valve 33, and a nozzle solenoid valve 34. The air path 32 is used to supply gas; gas output from the air source 31 is supplied to the air knife 10 through the air path 32, and gas output from the air source 31 is supplied to the nozzle 11 through the air path 32. The air knife solenoid valve 33 and the nozzle solenoid valve 34 are used to control the on / off state of the air path 32.

[0028] The control unit 4 is electrically connected to the air knife solenoid valve 33 and the nozzle solenoid valve 34 respectively, and can control the opening and closing of the air knife solenoid valve 33 and the nozzle solenoid valve 34 respectively.

[0029] Specifically, during material conveying, the distribution vehicle 51 moves laterally left and right, while the material distribution vehicle 52 reciprocates longitudinally. Upon receiving a signal indicating the end of material delivery, the material conveying stops. At this time, the material on both sides of the distribution vehicle 51 and the material distribution vehicle 52 can be purged. Therefore, the basic parameters of the tobacco leaves are received at this time, and different basic parameters result in different operating modes. These basic parameters may include tobacco leaf shape, moisture content, and other parameters. By controlling the operating modes of the air knife solenoid valve 33 and the nozzle solenoid valve 34 according to these basic parameters, the remaining material on the distribution vehicle 51 and the material distribution vehicle 52 can be purged.

[0030] The technical solution of this invention avoids the problems of high-altitude operation risks, low efficiency, and mixed-signage hazards that exist in manual cleaning, and solves the problem that existing automatic cleaning devices cannot simultaneously cover the distribution vehicle 51 and the material distribution vehicle 52, thus realizing automatic cleaning that is fully automated, without dead angles, and inherently safe.

[0031] Optional, continue to refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the width of the air curtain of the air knife 10 is greater than or equal to the width of the pressing strip 6 of the distribution vehicle 51 (not shown in the figure).

[0032] In order to ensure cleaning efficiency, the width of the air curtain of the air knife 10 is set to be greater than or equal to the width of the edge pressing belt 6 of the distribution vehicle 51, so as to cover the residual material on the edge pressing belt 6 during purging and improve purging efficiency.

[0033] In some embodiments, the air knife 10 may adopt a linear air outlet design to improve the purging effect.

[0034] Optional, continue to refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the nozzle 11 includes a universal adjustment bracket 111 and a nozzle head 112; The nozzle 112 is rotatably connected to the universal adjustment bracket 111; Each universal adjustment bracket 111 includes two nozzles 112; the spray range of one nozzle 112 includes the inside of the baffle, and the spray range of the other nozzle 112 includes the outside of the baffle.

[0035] The system includes a universal adjustment bracket 111 with two nozzles 112. Each nozzle 112 can rotate on the universal adjustment bracket 111 to change the spray direction. The spray range of one nozzle 112 includes the inner side of the baffle, which can be used to purge the inner side of the baffle. The spray range of the other nozzle 112 includes the outer side of the baffle, which can be used to purge the outer side of the baffle, forming an inner and outer purging layout.

[0036] For example, the nozzle 11 located inside the baffle is installed at an angle that is adjusted to tilt inward from the edge of the side plate of the fabric carrier 52 towards the surface of the conveyor belt, so that the fan-shaped airflow accurately blows the residual material on the edge pressing belt 6 back onto the surface of the conveyor belt, preventing it from splashing everywhere. The nozzle 11 located outside the baffle, facing outward, is used to clean up the smoke and dust that drifts out and adheres to the outside of the baffle of the fabric carrier 52, achieving comprehensive cleaning inside and out.

[0037] The technical solution of this invention provides two nozzles 112 on each universal adjustment bracket 111. The spray range of one nozzle 112 includes the inner side of the baffle, and the spray range of the other nozzle 112 includes the outer side of the baffle, thus achieving full coverage of the spray range. This can clean the residual material on the edge pressing belt and also clean the smoke and dust floating on the outer side of the baffle, achieving cleaning without dead angles.

[0038] Optional, continue to refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the air circuit group 3 also includes an air pressure regulating unit 7; The air pressure regulating unit 7 is located between the air source 31 and the air knife 10 and on the air passage 32 between the air source 31 and the nozzle 11; The control unit 4 is communicatively connected to the air pressure regulating unit 7 and is also used to output an air pressure regulating signal to the air pressure regulating unit 7 according to the basic parameters of the tobacco leaves, so as to regulate the air pressure in the air path 32.

[0039] The air pressure regulating unit 7 can be used to regulate the air pressure of the air source 31, thereby making the air pressure ejected from the air knife 10 and / or the nozzle 11 different, thus ensuring that the purging force of different materials is different.

[0040] Specifically, the required air pressure parameters for the current material are determined based on the basic parameters of the tobacco leaves, and an air pressure adjustment signal is output to the air pressure adjustment unit 7 based on the air pressure parameters to ensure the purging effect.

[0041] Based on the same inventive concept. Figure 5 This is a flowchart of a control method for a first automatic purging system according to an embodiment of the present invention, combined with... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, this embodiment of the invention provides a control method for an automatic purging system, which is applied in an automatic purging system; Control methods include: S10. Upon receiving the material arrival end signal, acquire the basic parameters of the tobacco leaves.

[0042] S11. Control the working modes of the air knife solenoid valve and the nozzle solenoid valve respectively according to the basic parameters of the tobacco leaves.

[0043] Specifically, during material conveying, the distribution vehicle 51 moves laterally left and right, while the material distribution vehicle 52 reciprocates longitudinally. Upon receiving a signal indicating the end of material delivery, the material conveying stops. At this time, the material on both sides of the distribution vehicle 51 and the material distribution vehicle 52 can be purged. Therefore, the basic parameters of the tobacco leaves are received at this time, and different basic parameters result in different operating modes. These basic parameters may include tobacco leaf shape, moisture content, and other parameters. By controlling the operating modes of the air knife solenoid valve 33 and the nozzle solenoid valve 34 according to these basic parameters, the remaining material on the distribution vehicle 51 and the material distribution vehicle 52 can be purged.

[0044] The technical solution of this invention avoids the problems of high-altitude operation risks, low efficiency, and mixed-signage hazards that exist in manual cleaning, and solves the problem that existing automatic cleaning devices cannot simultaneously cover the distribution vehicle 51 and the material distribution vehicle 52, thus realizing automatic cleaning that is fully automated, without dead angles, and inherently safe.

[0045] Based on the above embodiments, Figure 6 This is a flowchart of a control method for a second automatic purging system provided according to an embodiment of the present invention, combined with... Figure 1 Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, the control method includes: S20. Upon receiving the material arrival end signal, acquire the basic parameters of the tobacco leaves.

[0046] S21. Determine the first purging time of the air knife and the second purging time of the nozzle based on the basic parameters of the tobacco leaves.

[0047] S22, Control the first blowing duration of the air knife.

[0048] S23. Control the nozzle to open for the second purging duration.

[0049] Over-purging may generate dust and scattered materials, leading to secondary pollution, while incomplete purging may result in material residue. Therefore, different purging durations can be determined based on the different basic parameters of the tobacco leaves. The first purging duration corresponds to the purging duration of the air knife 10, and the second purging duration corresponds to the purging duration of the nozzle 11. During operation, the air knife 10 is first activated to purge the material in the distribution cart 51. After purging, the nozzle 11 is activated to purge the material in the spreading cart 52. This is because the material first arrives at the distribution cart 51 and is then transported to the spreading cart 52. The method of purging with the air knife 10 first and then with the nozzle 11 facilitates thorough cleaning of the material.

[0050] In some embodiments, since the air knife 10 and the nozzle 11 are symmetrically arranged, the right air knife 10 can be controlled to open for a first purging time first, and then the right nozzle 11 can be controlled to open for a second purging time; then the left air knife 10 can be controlled to open for a first purging time, and then the left nozzle 11 can be controlled to open for a second purging time. After all purging is completed, the air knife solenoid valve 33 and the nozzle solenoid valve 34 are closed.

[0051] The technical solution of this invention improves the removal rate of residual material in the pressing belt 6 by combining air knife 10 and nozzle 11 for blowing, fundamentally eliminating the quality risks of mixed brands and materials caused by residual material mixing into the next batch.

[0052] Based on the above embodiments, Figure 7 This is a flowchart of a control method for a third type of automatic purging system provided according to an embodiment of the present invention, combined with... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, the air circuit assembly 3 also includes an air pressure regulating unit 7; the control method includes: S30. Upon receiving the material arrival end signal, acquire the basic parameters of the tobacco leaves.

[0053] S31. Determine the first purging pressure of the air knife and the second purging pressure of the nozzle based on the basic parameters of the tobacco leaves.

[0054] The purging force varies depending on the basic parameters of the tobacco leaves. Therefore, the first purging pressure of the air knife 10 and the second purging pressure of the nozzle 11 are determined according to the basic parameters of the tobacco leaves, so as to ensure the purging effect without generating dust and scattered materials due to excessive purging.

[0055] S32, The control air pressure regulation unit adjusts the air path between the air knife and the air source to the first purging pressure.

[0056] S33, The control air pressure regulating unit adjusts the air path between the nozzle and the air source to the second purging pressure.

[0057] It is understandable that the first and second purging pressures corresponding to the basic parameters of tobacco leaves are different. A purging pressure database can be pre-established based on the basic parameters of tobacco leaves, and the corresponding first and second purging pressures can be automatically called when the basic parameters of tobacco leaves are obtained in real time, thereby achieving accurate purging of materials.

[0058] Based on the above embodiments, Figure 8 This is a flowchart of the control method for the fourth automatic purging system provided by an embodiment of the present invention, combined with... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 8 As shown, the basic parameters of tobacco leaves include tobacco leaf moisture content and tobacco leaf morphology; the control method includes: S40. Upon receiving the material arrival end signal, acquire the basic parameters of the tobacco leaves.

[0059] S41. Control the working mode of the air knife solenoid valve and the nozzle solenoid valve according to the tobacco leaf moisture content and tobacco leaf shape.

[0060] For example, when the tobacco leaf moisture content is 17% and the tobacco leaf shape is sheet-like, the first purging pressure can be 0.45 MPa, the second purging pressure can be 0.45 MPa, and the first purging time and the second purging time are both 2.5 s; when the tobacco leaf moisture content is 20% and the tobacco leaf shape is sheet-like, the first purging pressure can be 0.6 MPa, the second purging pressure can be 0.6 MPa, and the first purging time and the second purging time are both 3.5 s; when the tobacco leaf moisture content is 12.7% and the tobacco leaf shape is filamentous, the first purging pressure can be 0.3 MPa, the second purging pressure can be 0.3 MPa, and the first purging time and the second purging time are both 1.5 s; when the tobacco leaf moisture content is 12.3% and the tobacco leaf shape is filamentous, the first purging pressure can be 0.35 MPa, the second purging pressure can be 0.35 MPa, and the first purging time and the second purging time are both 1.5 s.

[0061] Based on the above embodiments, Figure 9 This is a flowchart of the control method for the fifth automatic purging system provided according to an embodiment of the present invention, combined with... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 9 As shown, the control method includes: S50. When receiving the material arrival end signal, read the material flow signal.

[0062] S51. When the material flow signal is zero and a preset delay time is continuously applied, the basic parameters of the tobacco leaf are obtained.

[0063] S52. Control the working modes of the air knife solenoid valve and the nozzle solenoid valve respectively according to the basic parameters of the tobacco leaves.

[0064] Specifically, the preset delay time varies depending on the basic parameters of the tobacco leaves. This delay time is related to dust and scattered materials. The different preset delay times for different basic parameters of the tobacco leaves ensure that the residual material is accurately blown back into the cabinet, while avoiding splashing and secondary pollution.

[0065] Based on the above embodiments, Figure 10 This is a flowchart of the control method for the sixth automatic purging system provided by an embodiment of the present invention, combined with... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 10 As shown, the control method includes: S60. Upon receiving the material arrival end signal, acquire the basic parameters of the tobacco leaves.

[0066] S61. Control the working modes of the air knife solenoid valve and the nozzle solenoid valve respectively according to the basic parameters of the tobacco leaves.

[0067] S62. When the number of purging cycles is less than the preset number, continue to control the air knife solenoid valve to purge and continue to control the nozzle solenoid valve to purge.

[0068] The number of purging cycles can be defined as the number of times the air knife 10 and nozzle 11 are cycled in the current state, meaning that the air knife 10 and nozzle 11 work in a sequential cycle. To ensure the purging effect, different preset number of cycles are set for different basic tobacco leaf parameters.

[0069] For example, when the tobacco leaf moisture content is 17% and the leaf shape is sheet-like, the first purging pressure can be 0.45 MPa, the second purging pressure can be 0.45 MPa, the first purging duration and the second purging duration are both 2.5 s, and the preset number of purgings is 2; when the tobacco leaf moisture content is 20% and the leaf shape is sheet-like, the first purging pressure can be 0.6 MPa, the second purging pressure can be 0.6 MPa, the first purging duration and the second purging duration are both 3.5 s, and the preset number of purgings is 3. When the tobacco leaf moisture content is 12.7% and the leaf shape is filamentous, the first purging pressure can be 0.3 MPa, the second purging pressure can be 0.3 MPa, the first purging duration and the second purging duration are both 1.5 s, and the preset number of purging cycles is 1. When the tobacco leaf moisture content is 12.3% and the leaf shape is filamentous, the first purging pressure can be 0.35 MPa, the second purging pressure can be 0.35 MPa, the first purging duration and the second purging duration are both 1.5 s, and the preset number of purging cycles is 2. Purging is stopped after the preset number of cycles is reached.

[0070] The technical solutions of the embodiments of the present invention have the following beneficial effects: Intrinsic safety: It completely eliminates the safety risks of employees working at heights, thus achieving "intrinsic safety".

[0071] Comprehensive coverage: It simultaneously covers the two major residue accumulation points, the distribution vehicle and the placing vehicle. The placing vehicle adopts an "inside and outside" nozzle layout, which can clean the residue on the pressing strip and the smoke and dust scattered on the outside of the baffle, achieving cleaning without dead corners.

[0072] Efficiency is doubled: the total time for a single card change and cleaning is ≤30 seconds (segmented cleaning by distribution vehicle and cloth vehicle), while manual cleaning takes an average of 8-10 minutes, thus improving efficiency; it also significantly reduces equipment downtime and energy consumption.

[0073] Preventing Mixed Batch: The combination of air knife and fan nozzles ensures 100% removal of residual material from the pressing edge, fundamentally eliminating the quality risks caused by residual material mixing into the next batch.

[0074] Precise energy saving: The dual-sided independent pressure adjustment function can set the air pressure separately according to the material characteristics, which saves compressed air consumption compared with the dual-sided same pressure solution.

[0075] Intelligent linkage: Based on the material signal delay trigger of the electronic scale, automatic coordination with the production cycle is achieved without manual intervention.

[0076] It can be manufactured and used in tobacco processing production lines, and can also be applied to other industries (such as food, chemical, and feed) with similar distribution car / material distribution car structures and residual material accumulation problems.

[0077] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0078] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An automatic purging system, characterized in that, include: The distribution vehicle purging actuator, the fabric spreading vehicle purging actuator, the air circuit assembly, and the control unit; The purging execution unit of the distribution vehicle includes at least one set of air blades, and the air blades in the same set are symmetrically arranged on the baffles on both sides of the distribution vehicle. The fabric carrier blowing execution unit includes at least one set of nozzles, which are symmetrically arranged on the brackets on both sides of the fabric carrier. The air circuit assembly includes an air source, an air circuit, an air knife solenoid valve, and a nozzle solenoid valve; the air circuit is used to connect the air source and the air knife, and to connect the air source and the nozzle; the air knife solenoid valve is used to be installed on the air circuit between the air source and the air knife; the nozzle solenoid valve is used to be installed on the air circuit between the air source and the nozzle. The control unit is electrically connected to the air knife solenoid valve and the nozzle solenoid valve respectively, and is used to acquire the basic parameters of the tobacco leaves when receiving the material arrival end signal, and control the working mode of the air knife solenoid valve and the nozzle solenoid valve respectively according to the basic parameters of the tobacco leaves.

2. The automatic purging system according to claim 1, characterized in that, The width of the air curtain of the air knife is greater than or equal to the width of the pressing strip of the distribution vehicle.

3. The automatic purging system according to claim 1, characterized in that, The nozzle includes a universal adjustment bracket and a nozzle head; The nozzle is rotatably connected to the universal adjustment bracket; Each of the universal adjustment brackets includes two nozzles; the spray range of one nozzle includes the inner side of the baffle, and the spray range of the other nozzle includes the outer side of the baffle.

4. The automatic purging system according to claim 1, characterized in that, The air circuit assembly also includes an air pressure regulating unit; The air pressure regulating unit is disposed between the air source and the air knife, and is also disposed in the air path between the air source and the nozzle; The control unit is communicatively connected to the air pressure regulating unit and is also used to output an air pressure regulating signal to the air pressure regulating unit according to the basic parameters of the tobacco leaves, so as to regulate the air pressure in the air path.

5. A control method for an automatic purging system, characterized in that, Applied in the automatic purging system according to any one of claims 1-4; The control method includes: Upon receiving the material arrival end signal, acquire the basic parameters of the tobacco leaves; The operating modes of the air knife solenoid valve and the nozzle solenoid valve are controlled according to the basic parameters of the tobacco leaves.

6. The control method according to claim 5, characterized in that, The operating modes of the air knife solenoid valve and the nozzle solenoid valve are controlled according to the basic parameters of the tobacco leaves, including: The first purging duration of the air knife and the second purging duration of the nozzle are determined based on the basic parameters of the tobacco leaves. Control the air knife to activate for the first purging duration; Control the nozzle to open for the second purging duration.

7. The control method according to claim 5, characterized in that, The air circuit assembly also includes an air pressure regulating unit; The operating modes of the air knife solenoid valve and the nozzle solenoid valve are controlled according to the basic parameters of the tobacco leaves, including: The first purging pressure of the air knife and the second purging pressure of the nozzle are determined based on the basic parameters of the tobacco leaves. The air pressure regulating unit controls the air path between the air knife and the air source to adjust to the first purging pressure; The air pressure regulating unit controls the air path between the nozzle and the air source to adjust to the second purging pressure.

8. The control method according to claim 5, characterized in that, The basic parameters of the tobacco leaves include the moisture content and morphology of the tobacco leaves. The operating modes of the air knife solenoid valve and the nozzle solenoid valve are controlled according to the tobacco leaf moisture content and the tobacco leaf morphology.

9. The control method according to claim 5, characterized in that, Upon receiving the material arrival end signal, acquire the basic parameters of the tobacco leaves, including: Upon receiving the material arrival end signal, read the material flow rate signal; When the material flow signal is zero and a preset delay time is maintained, the basic parameters of the tobacco leaves are obtained.

10. The control method according to claim 5, characterized in that, After controlling the operating modes of the air knife solenoid valve and the nozzle solenoid valve according to the basic parameters of the tobacco leaves, the method further includes: When the number of purging cycles is less than the preset number, the air knife solenoid valve is controlled to continue purging, and the nozzle solenoid valve is controlled to continue purging.

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