Tobacco charging machine barrel wall material recycling and intelligent cleaning system and method

Abstract

The invention discloses a material recovery and intelligent cleaning system and method for a barrel wall of a tobacco charging machine, and belongs to the technical field of tobacco processing equipment. The system comprises a material recovery device, an intelligent cleaning device and an electric control cabinet which are mounted outside a roller; the material recovery device is composed of a compressed air injection device and a variable-frequency air blower, the compressed air injection device injects compressed air to the inner wall of the rotary roller through a pressurizing nozzle capable of axially moving so as to blow off adhered materials, and the variable-frequency air blower sends the blown-off dry materials out of the roller for recovery through controlled airflow; the intelligent cleaning device comprises two roller cleaning devices horizontally installed above the discharging end of the roller and obliquely installed below the feeding end of the roller, and a water supply module for supplying water to the roller cleaning devices. According to the invention, automatic recovery of adhered materials and comprehensive and automatic cleaning of the roller are realized, the safety risk that a worker enters the roller is avoided, and the cleaning efficiency and the material utilization rate are improved.

Description

Technical Field

[0001] This invention relates to the field of tobacco processing equipment technology, specifically to a system and method for recovering and intelligently cleaning materials from the cylinder wall of a tobacco feeder. Background Technology

[0002] In tobacco processing, the feeder is a key piece of equipment used to evenly spray liquid materials such as sugars and flavorings onto tobacco leaves. Its core component is a rotating drum with rakes on its inner wall to scoop up and scatter the tobacco leaves, promoting liquid penetration. However, during the feeding process, some tobacco leaves adhere firmly to the inner wall of the drum, the rakes, and the end panels at both ends of the drum (i.e., the front and rear chambers) due to the stickiness of the moisture and sugars.

[0003] Existing technologies primarily address this issue in two ways: one is through manual cleaning by operators entering the drum after shutdown, and the other is by relying on a simple cleaning device built into the drum. Manual cleaning presents significant safety hazards: the drum's interior is narrow, filled with rakes, and the drum walls are slippery during cleaning, making injuries or slips highly likely. Furthermore, it is inefficient and labor-intensive. The built-in cleaning device is typically limited in function, only capable of rinsing part of the drum's inner wall, failing to effectively clean residual material between the rakes or the walls at both ends of the drum. Moreover, the resulting soot and water mix and become waste, which is directly discharged into the drain, resulting in considerable material waste.

[0004] A search revealed existing technologies, such as Chinese patent CN201420341822.1, which discloses a feeding machine cylinder wall cleaning device. This device uses a rotating brush to mechanically scrape the cylinder wall, which can achieve cleaning, but does not solve the problem of recovering adhering materials, and the mechanical contact may cause wear to the equipment. In addition, there are existing technologies that use high-pressure airflow to treat cylinder wall adhering materials online, but the functions are relatively simple and fail to integrate material recovery, deep cleaning and intelligent control. They cannot safely, efficiently and automatically solve the problems of material waste and comprehensive cleaning during shutdown maintenance.

[0005] Therefore, how to safely, efficiently, and automatically recover adhering materials and complete all-round cleaning of the roller has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] The primary objective of this invention is to overcome the aforementioned deficiencies of the prior art and provide a tobacco feeder cylinder wall material recovery and intelligent cleaning system and method. This system can automatically and safely recover tobacco material adhering to the inner wall, rake nails and end face of the cylinder after the production batch is completed, and transport it back to the production line to avoid material waste. Another objective of this invention is to perform all-round, high-pressure automatic cleaning of the inside of the cylinder after material recovery, completely eliminating the safety risks of manual entry into the cylinder for cleaning, and significantly improving cleaning efficiency and quality.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a tobacco feeder cylinder wall material recovery and intelligent cleaning system, comprising:

[0008] A drum, the inner side of which is equipped with rakes, and which can rotate around its axis;

[0009] A material recovery device is installed outside the drum to blow off and send the tobacco material adhering to the inner wall of the drum out of the drum.

[0010] An intelligent cleaning device is installed on the outside of the drum for high-pressure water cleaning of the inner wall of the drum;

[0011] And an electrical control cabinet, which is electrically connected to the material recycling device and the intelligent cleaning device respectively, for controlling the two to run automatically in sequence according to a preset program;

[0012] The material recovery device includes a compressed air jetting device disposed outside the drum and a variable frequency blower. The compressed air jetting device is used to spray compressed air onto the inner wall of the drum to blow off the material, and the variable frequency blower is used to send airflow into the drum to send the blown-off material out of the drum.

[0013] The intelligent cleaning device includes a drum cleaning device disposed outside the drum, and a water supply module for supplying water to the drum cleaning device.

[0014] Preferably, the compressed air injection device includes:

[0015] The mounting base is fixedly installed above the feed end of the roller; the mounting base is the side wall of the feed groove of the roller or the frame;

[0016] A horizontally mounted carriage 1 on the installation base;

[0017] A slide table slidably mounted on the slide frame;

[0018] A jetting assembly is fixedly connected to the slide and can move along the slide along an axial direction. The jetting assembly includes an air duct and a pressurized nozzle installed at the end of the air duct.

[0019] A geared motor is fixedly installed at one end of the slide, and the output shaft of the geared motor is connected to the slide through a transmission mechanism to drive its movement;

[0020] The air duct is connected to an external compressed air source via a connecting pipe.

[0021] Preferably, a manual ball valve and a solenoid valve controlled by the electrical control cabinet are sequentially installed on the connecting pipe between the air duct and the external compressed air source.

[0022] Preferably, the pressurizing nozzle is a conical rotating nozzle.

[0023] Preferably, the air outlet of the variable frequency blower is divided into a first branch and a second branch through a pipeline. The first branch is connected to the feed end sidewall of the drum, and the second branch is connected to the discharge end sidewall of the drum.

[0024] Preferably, solenoid valve two and solenoid valve three, which are controlled by the electrical control cabinet, are respectively installed on the first branch and the second branch.

[0025] Preferably, the drum cleaning device includes:

[0026] Mounting rack;

[0027] The second slide is mounted on the mounting frame;

[0028] A second slide table is slidably mounted on the second slide frame;

[0029] A water spraying assembly is fixedly connected to the slide table 2 and can move along the axis of the slide table 2 together with it. The water spraying assembly includes a water spraying pipe and a water spraying nozzle installed at one end of the water spraying pipe. The water spraying nozzle is a four-cone rotating nozzle, and each cone surface has a spray hole.

[0030] A second geared motor is fixedly installed at the two ends of the slide. The output shaft of the second geared motor is connected to the second slide via a transmission mechanism to drive its movement.

[0031] The other end of the spray pipe is provided with a water receiving end and is connected to the water supply module through a metal hose.

[0032] Preferably, the number of the cylinder cleaning devices is two;

[0033] One of them has its mounting bracket horizontally fixed to the frame or housing at the discharge end of the roller and located above the discharge end, so that the movement trajectory of the water spray nozzle is parallel to the roller axis.

[0034] Another type has its mounting bracket fixed at an angle to the frame or housing at the feed end of the roller and located below the feed end, so that the movement trajectory of the water spray nozzle is inclined to the roller axis.

[0035] Preferably, the water supply module includes a water storage tank, a filter, a water pump, and a water supply pipeline; the inlet of the water pump is connected to the water storage tank via the water supply pipeline, the filter, and the outlet is connected to the water inlet of the cylinder cleaning device via a high-pressure hose.

[0036] The water storage tank is equipped with a float level gauge, and a water supply pipe is installed on the top of the water storage tank;

[0037] An electric ball valve controlled by the electrical control cabinet is installed on the high-pressure hose between the water pump and the water inlet.

[0038] A method for recovering and intelligently cleaning the material on the cylinder wall of a tobacco feeder used in the above system includes the following steps automatically executed by the electrical control cabinet according to a preset program:

[0039] S1. Material recovery steps: Control the start of the geared motor of the compressed air blowing device to drive the booster nozzle to extend into the rotating drum and move along its axial direction. At the same time, control the opening of solenoid valve 1 to spray compressed air into the inner wall of the drum to blow off the adhering material. Subsequently, control the start of the variable frequency blower and control the opening of solenoid valve 2 and / or solenoid valve 3 to send airflow into the drum and send the blown-off material out of the drum for recovery.

[0040] S2. Intelligent cleaning steps: After the material recycling step is completed, the water pump of the water supply module is started and the electric ball valve is opened; the two reduction motors of the two drum cleaning devices are started respectively, driving their respective water spray nozzles to move back and forth along their corresponding movement trajectory, and high-pressure water jets are sprayed onto the inner wall of the drum for cleaning through the water spray nozzles.

[0041] Compared with the prior art, the beneficial effects of the present invention are:

[0042] 1. In this invention, by setting up a material recovery device and an intelligent cleaning device controlled by an electrical control cabinet program, after the production batch is completed, the compressed air jetting device first precisely sprays compressed air onto the inner wall, rake nails and end face of the rotating drum to blow off the adhering material. Then, the directional airflow generated by the variable frequency blower sends the blown-off dry material out of the drum and back to the production line. This solves the problems of high safety hazards, low efficiency and material waste in traditional manual cleaning methods, realizes the automated and lossless recovery of adhering materials, and improves the utilization rate of raw materials.

[0043] 2. In this invention, by setting axially movable drum cleaning devices above the discharge end and below the feed end on the outside of the drum, the drum cavity, rake gaps, and front and rear end faces are automatically cleaned by high-pressure water jet after material recovery. This solves the problems of limited cleaning range and poor effect of self-contained cleaning devices, as well as the high labor intensity and safety risks of manual cleaning. It achieves high-quality automated cleaning of the inside of the drum without dead corners and eliminates the need for personnel to enter the drum.

[0044] 3. In this invention, multiple functional modules such as compressed air blowing, variable frequency blower feeding, and high-pressure water cleaning are integrated into a unified electrical control system. The electrical control cabinet controls the sequential start-up and shutdown of each device, the opening and closing of valves, and the actions of actuators according to a preset program. This solves the problems of existing technologies, such as single function, cumbersome operation, and inability to achieve full-process automation. It realizes "one-click" intelligent operation from material recovery to equipment cleaning, which greatly improves equipment maintenance efficiency and process standardization. By designing a precision moving mechanism including a slide, slide table, and geared motor for the blowing and cleaning devices, and using conical rotating nozzles and four-conical rotating nozzles, it ensures that the sprayed medium can uniformly and fully cover the entire inner surface of the drum. This solves the problem of coverage blind spots in fixed blowing or cleaning, and achieves efficient and uniform action on complex drum wall structures, ensuring thorough recovery and cleaning. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the connection structure of the roller in this invention; Figure 3 This is a schematic diagram of the structure of the hollow compressed air injection device of the present invention; Figure 4 This is a schematic diagram of the structure of the middle cylinder cleaning device of the present invention; Figure 5 This is a schematic diagram of the connection structure of the water supply module in this invention.

[0046] In the diagram: 1. Drum; 2. Compressed air jet cleaning device; 3. Drum cleaning device; 4. Electric ball valve; 5. Water pump; 6. Filter; 7. Water storage tank; 8. Electrical control cabinet; 9. Variable frequency blower; 10. High-pressure hose; 201. Booster nozzle; 202. Air duct; 203. Slide table one; 204. Carriage one; 205. Gear motor one; 206. Solenoid valve one; 207. Manual ball valve; 208. 1. Mounting base; 210. Connecting pipes; 301. Spray nozzle; 302. Spray pipe; 303. Second slide; 304. Second slide; 305. Second geared motor; 306. Water inlet; 308. Mounting bracket; 309. Feed pump; 701. Float level gauge; 702. Water supply pipe; 901. First branch; 902. Second branch; 903. Second solenoid valve; 904. Third solenoid valve. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the description herein is for illustrative purposes only and is not intended to limit the scope of the invention.

[0048] Please see Figures 1 to 5This invention provides a material recovery and intelligent cleaning system for the drum wall of a tobacco feeder. The system is installed externally to the drum 1 of an existing tobacco feeder, and is relatively independent of the original equipment's power and control system. It achieves automated operation through electrical control integration.

[0049] Example 1: System Overall Structure and Layout

[0050] The system mainly includes a material recycling device, an intelligent cleaning device, and a centrally controlled electrical control cabinet 8.

[0051] The roller 1 is the core component of the feeder, and its inner wall is evenly distributed with rakes for turning the tobacco leaves. The two ends of the roller 1 are the discharge ends. Figure 1 Left side (i.e., the anterior chamber) and feed end ( Figure 1 On the right side (i.e., the rear chamber), a drive unit (not shown in the figure) rotates around its horizontal axis. The normal feeding speed is generally 8-15 rpm. When this system is working, the drum 1 maintains a low rotation speed (e.g., 3-8 rpm) so that different parts of the inner wall can be exposed to the spraying area in sequence.

[0052] The electrical control cabinet 8 is fixedly installed at the equipment site. Internally, it uses a programmable logic controller (PLC) as its core and is equipped with a human-machine interface (HMI), motor drivers, relay groups, and analog / digital input / output modules. Through pre-laid control and power cables, the I / O points of the electrical control cabinet 8 are connected to: the start / stop and speed control terminals of the first geared motor 205 and the second geared motor 305; the coils of the first solenoid valve 206, the second solenoid valve 903, the third solenoid valve 904, and the electric ball valve 4; the main control circuit of the variable frequency blower 9 and the water pump 5; and it receives level signals from the float level gauge 701.

[0053] The PLC is programmed with a control program that implements the automation method of this invention. The program includes two main routines: "Material Recycling" and "Intelligent Cleaning". When the operator triggers the "Material Recycling" command through the HMI, the PLC first outputs a signal to start the drum 1 to rotate at low speed. Then, it sequentially controls the geared motor 205 to drive the pressurized nozzle 201 to move. At the same time, it opens the solenoid valve 206 to spray. After completion, it starts the variable frequency blower 9 and opens the corresponding branch solenoid valves to feed and recycle materials.

[0054] The "intelligent cleaning" routine sequentially starts the water pump 5, opens the electric ball valve 4, and controls the two geared motors 305 to drive the water spray nozzles 301 to move back and forth for cleaning. The execution conditions, timing, and interlock logic of all steps are set in the program, and the electrical control cabinet 8 controls the process execution in real time through cyclic scanning.

[0055] Example 2: Specific Implementation of the Material Recovery Device

[0056] The core task of the material recovery device is to blow off and send out the dry tobacco material that is attached to the inner wall of the drum 1 and the rake nails. This device is completed by the air compressor blowing device 2 and the variable frequency blower 9 working together.

[0057] Compressed air jet device 2: Its function is to generate a high-speed, concentrated jet of compressed air to physically peel off the adhering material.

[0058] like Figure 3 As shown, the entire device is fixed to an existing structure above the feed end of the drum 1, such as the side wall of the feed trough or the main frame, via a rigid mounting base 208. A slide 204 is horizontally fixed on the mounting base 208. A slide table 203 is engaged with the slide 204 via a linear bearing or a slider and can slide along the axial direction of the slide 204 (i.e., parallel to the axis of the drum 1). A geared motor 205 is fixed to one end of the slide 204 by bolts, and its output shaft is connected to the slide table 203 via a transmission mechanism, thereby driving the slide table 203 to perform reciprocating linear motion.

[0059] Taking lead screw drive as an example, the specific implementation method of its transmission mechanism is as follows:

[0060] The transmission mechanism mainly consists of a lead screw, nut, coupling, bearing and bearing housing, and guide components.

[0061] The lead screw is horizontally positioned, with its axis parallel to the axial centerline of the slide 204. One end of the lead screw is directly connected to the output shaft of the geared motor 205 fixed to the end of the slide 204 via a coupling, and is driven to rotate by the geared motor 205; the other end of the lead screw is supported by a bearing in a bearing seat fixed to the other end of the slide 204, ensuring smooth lead screw transmission and accurate axial positioning.

[0062] The nut is precisely fitted with the lead screw, and the nut is rigidly connected to the slide table 203 through a connecting block, so that the linear motion of the nut can be directly transmitted to the slide table 203.

[0063] To ensure that the slide table 203 and its connected spray assembly do not twist during movement, a light shaft is also provided on the slide frame 204 parallel to the lead screw as a guide rod. A linear bearing or sliding bushing is installed on the slide table 203 or the aforementioned connecting block. The linear bearing or sliding bushing cooperates with the guide rod to form a sliding guide pair.

[0064] Its working principle is as follows: When the electrical control cabinet 8 starts the geared motor 205, the output shaft of the geared motor 205 drives the lead screw to rotate through the coupling. The nut meshing with the lead screw converts the rotational motion into linear motion along the lead screw axis under the action of the rotating lead screw. Since the nut is fixed to the slide table 203 through the connecting block, and the rotation of the slide table 203 is constrained by the guide rod, the slide table 203 will strictly follow the lead of the lead screw and make precise and stable reciprocating linear motion on the slide frame 204, thereby driving the fixed air duct 202 and the booster nozzle 201 to extend into or out of the roller 1 and complete the axial scanning operation. By programming and controlling the direction and speed of the geared motor 205 through the electrical control cabinet 8, the moving direction, speed and stroke of the booster nozzle 201 can be precisely controlled.

[0065] It is worth mentioning that the transmission mechanism is not limited to the lead screw type, but can also be a common linear transmission method such as a synchronous belt and synchronous pulley mechanism or a gear and rack mechanism.

[0066] In this embodiment, a spray assembly is fixedly connected to the slide table 203, including an air duct 202 and a booster nozzle 201 installed at the end of the air duct 202 (extending into the roller end); the air duct 202 is preferably a stainless steel pipe with sufficient rigidity and pressure resistance. The booster nozzle 201 is preferably a conical rotating nozzle, which can rotate at high speed after compressed air is introduced, diffusing the concentrated airflow into a conical coverage surface, effectively expanding the effective area of ​​single-point spraying and improving the purging efficiency.

[0067] Specifically, in this embodiment, the inlet end of the air duct 202 is connected to the connecting pipe 210 via a pressure-resistant flexible pipe (such as a PU pipe). The connecting pipe 210 is connected to an external compressed air source in the workshop (normal pressure 0.6-0.8MPa). In this air path, a manual ball valve 207 and a solenoid valve 206 are connected in series. The manual ball valve 207 is a maintenance isolation valve and is normally open. The solenoid valve 206 is controlled by the electrical control cabinet 8 and is used to open and close the compressed air under an automatic program. The geared motor 205 is also controlled by the electrical control cabinet 8 and can drive the booster nozzle 201 to move from one end of the roller 1 to the other end at a speed set by the program (such as 0.1-0.3m / s).

[0068] In this embodiment, the variable frequency blower 9 is used to generate a directional and adjustable airflow to "envelop" and send the blown-off dry material out of the drum 1.

[0069] Specifically, the airflow design is as follows: the outlet of the variable frequency blower 9 (whose power can be selected according to the drum volume, such as 5.5-11kW) is divided into two paths through the air duct: the first branch 901 is connected to the reserved interface on the side wall or end cover of the feed end of the drum 1, and the airflow direction is towards the discharge end; the second branch 902 is connected to the reserved interface on the side wall or end cover of the discharge end of the drum 1, and the airflow direction can be designed as an auxiliary disturbance or to form a certain convection with the main airflow direction as needed. This design can flexibly select the air supply mode according to the material adhesion and process requirements, including supplying air only from the feed end, or supplying air from both ends at the same time to form a through airflow.

[0070] On the first branch 901 and the second branch 902, solenoid valve 2 903 and solenoid valve 3 904, which are controlled by the electrical control cabinet 8, are installed respectively to select which air path to open. The motor of the variable frequency blower 9 is driven by the frequency converter in the electrical control cabinet 8, and the air volume and air pressure can be adjusted according to the program settings.

[0071] Example 3: Specific Implementation of the Intelligent Cleaning Device

[0072] The intelligent cleaning device is activated after material recovery, responsible for thoroughly high-pressure water cleaning of the inner wall of drum 1, the rake nails, and both end faces. The device consists of two drum cleaning units 3 and a water supply module.

[0073] Cylinder cleaning device 3: Its function is to carry the high-pressure water nozzle and make it move along a specific trajectory to achieve full coverage cleaning.

[0074] like Figure 4 As shown, the core of each cylinder cleaning device 3 is a linear motion mechanism similar to the compressed air blowing device 2. It includes a mounting bracket 308 on which a slide 304 is fixed. A slide 303 is slidably mounted on the slide 304 and driven by a reduction motor 305 fixed at one end through a transmission mechanism. Fixed to the slide 303 is a water spray assembly, including a water spray pipe 302 and a water spray nozzle 301 installed at its end. The other end of the water spray pipe 302 is provided with a water inlet 306 for connecting to a water supply pipeline. To enhance the impact force of the cleaning water flow and improve the cleaning effect on stubborn stains, a pressurization unit can be set in the water inlet path of the water spray pipe 302. Specifically, a preferred embodiment is to set a feed pump 309 in series at the water inlet 306. The inlet of the feed pump 309 is connected to the high-pressure hose 10 from the water supply module through a quick connector, and its outlet is directly connected to the water inlet 306 of the water spray pipe 302. Therefore, the high-pressure water flow delivered from the main booster pump 5 will be pressurized a second time by the feed pump 309 before entering the spray pipe 302, thereby raising the water pressure to a higher predetermined working pressure. Finally, this ultra-high pressure water flow is delivered to the spray nozzle 301 through the spray pipe 302 and impacts the inner wall of the drum with extremely high kinetic energy, achieving powerful crushing and removal of the root of the rake nail, gaps and dried material stains.

[0075] The key feature of this embodiment is that the two cleaning devices are installed in different orientations, respectively targeting the front chamber (discharge end) and rear chamber (feed end) of drum 1:

[0076] The first cleaning device (for the front chamber) has its mounting bracket 308 horizontally fixed on the frame or housing above the discharge end of the drum 1. This allows the movement trajectory of its slide 304 and water spray nozzle 301 to be parallel to the axis of the drum 1, enabling it to extend horizontally and primarily clean the inner wall of the cylindrical section of the drum 1, the rake nails, and the end face of the front chamber.

[0077] The second cleaning device (for the rear chamber) has its mounting bracket 308 fixed at a certain angle (e.g., 15-30° angle with the horizontal plane) on the frame or housing below the feed end of the drum 1. This makes the movement trajectory of its water spray nozzle 301 inclined to the drum axis, enabling it to focus on cleaning the rear chamber end face and the adjacent inner wall of the drum from below and upward, solving the problem of the rear chamber being low and difficult to clean vertically.

[0078] Specifically, the water spray nozzle 301 is a four-cone rotating nozzle, the core of which is a nozzle that can rotate at high speed under the drive of high-pressure water. Fine spray holes are evenly distributed on the four conical surfaces around it. This structure can form an umbrella-shaped high-pressure water curtain with a large coverage area, strong impact force, uniform coverage, and can effectively clean the roots and gaps of the rake nails.

[0079] Furthermore, in this embodiment, the water supply module is used to provide a stable, clean, and high-pressure water source for the cleaning device.

[0080] like Figure 5 As shown, the water supply module includes a water storage tank 7, a filter 6, a water pump 5, and water supply pipes connecting them. The water storage tank 7 provides buffering and water storage, and is equipped with a float level gauge 701 to monitor the water level and automatically replenish water through the top water supply pipe 702 when the water level is low (the water supply valve can be linked for control). The water flows through the filter 6 (with an accuracy of, for example, 100 microns) to remove impurities and protect subsequent high-pressure components. The water pump 5 (pressure selectable from 10-20 MPa) is the core power source, increasing the pressure of the water from normal pressure to high pressure.

[0081] The outlet of the water pump 5 is connected in parallel to the water inlet 306 of the two cylinder cleaning devices 3 via a high-pressure resistant hose 10. An electric ball valve 4, controlled by the electrical control cabinet 8, is installed near the nozzle on the main pipeline or branch pipeline to precisely control the supply and cut-off of high-pressure water in the program. The geared motor 305 is also controlled by the electrical control cabinet 8 to drive the nozzle to move.

[0082] Example 4: System Automated Workflow and Method

[0083] The intelligent control logic of the electrical control cabinet 8 is not only reflected in starting and stopping the equipment according to a preset sequence, but also in its built-in program for judging the status of the operation process, optimizing parameters, and monitoring safety. Specifically, it is reflected in the following aspects:

[0084] During the material recovery stage, the program does not solely rely on timed control. In a preferred embodiment, the electrical control cabinet 8 can determine whether the pressure-boosting nozzle 201 has completed scanning the entire inner wall of the roller 1 based on its movement stroke signal. Upon confirmation of completion, the program automatically proceeds to the next stage—starting the variable frequency blower 9 for material feeding and recovery. This feedback control, based on the actual actions of the actuators, ensures the accuracy and reliability of the process flow. Similarly, in the intelligent cleaning stage, the cleaning time can be set to a fixed value or designed to automatically end after the two water spray nozzles 301 complete a preset number of reciprocating cycles, achieving precise management of the cleaning workload.

[0085] To achieve thorough cleaning, the PLC program coordinates the rotational speed of the drum 1 with the axial movement speed of the water spray head 301. The program can set the drum 1 to rotate at a constant low speed, while controlling the geared motor 305 to drive the water spray head 301 to move at a matching speed. By accurately calculating the relationship between the coverage angle of the water curtain and the moving speed and the circumferential rotation speed of the drum, it ensures that within one axial stroke of the nozzle, the high-pressure water curtain it sprays can cover every area of ​​the inner circumference of the drum, avoiding cleaning blind spots.

[0086] The control program includes multiple safety interlock logics, including: a) The geared motor 305 is only allowed to drive the spray nozzle 301 to move or retract when it is confirmed that the electric ball valve 4 is closed or there is no high pressure in the water supply pipeline, to prevent accidental splashing of high-pressure water; b) Before the variable frequency blower 9 starts, the program will check whether the solenoid valve 206 has been reliably closed to avoid compressed air interfering with the directionality of the airflow; c) By monitoring the signal of the float level gauge 701, the cleaning program is automatically paused and an alarm is triggered when the water level in the water tank 7 is too low, to prevent the water pump 5 from running dry and being damaged. In addition, the program can also monitor the operating current of each motor in real time, and immediately stop the machine and trigger an alarm when an overload occurs, prompting maintenance personnel to check.

[0087] The human-machine interface (HMI) provides a user-friendly parameter setting window. Operators can select different working modes, such as "standard recycling + cleaning," "deep cleaning," and "recycling only," based on the adhesion characteristics of different batches of tobacco leaves or different cleaning requirements. They can also adjust key parameters, such as blowing pressure, blower frequency, cleaning water pressure, nozzle movement speed, and cleaning time. These parameters are stored in the PLC, allowing for one-click activation of the same mode the next time, achieving a balance between flexible and standardized operations.

[0088] Through the intelligent control program that integrates status feedback, motion coordination, safety monitoring and parameterized management, this system has truly achieved a leap from "automatic execution of a single action" to "intelligent management of the entire cleaning process", ensuring that the operation process is efficient, safe, reliable and repeatable.

[0089] Based on the above system, a method for material recovery and intelligent cleaning of the cylinder wall of a tobacco feeder, automatically executed by the electrical control cabinet 8 according to a preset program, includes the following steps:

[0090] S1, Material Recovery Stage:

[0091] The operator selects to start the "Material Recovery" program on the HMI of electrical control cabinet 8. Electrical control cabinet 8 first confirms that roller 1 is in a low-speed rotation state (or issues a command to start its low-speed rotation).

[0092] The electrical control cabinet 8 starts the geared motor 205 of the compressed air jet device 2, driving the booster nozzle 201 to extend horizontally into the inside of the drum 1 from the standby position (usually outside the drum).

[0093] When the nozzle reaches the starting position, the electrical control cabinet 8 opens the solenoid valve 206, and compressed air (e.g., 0.6MPa) is ejected at high speed from the rotating booster nozzle 201, forming a cone-shaped air curtain that impacts the inner wall of the roller.

[0094] The geared motor 205 drives the booster nozzle 201 to move at a constant speed along the axis of the drum at a set speed. At the same time, the drum continues to rotate slowly, so that the compressed air jet can scan the entire inner wall of the drum, the rake nails and the end faces of both ends in sequence, and blow off the adhering dry material completely.

[0095] After the nozzle completes one stroke, solenoid valve 206 closes, and the nozzle returns to the standby position. Subsequently, the electrical control cabinet 8 starts the variable frequency blower 9 and opens the corresponding solenoid valve 903 or solenoid valve 904 according to the preset mode (such as "front air supply" mode).

[0096] A strong directional airflow (adjustable speed) enters the drum 1, which conveys the dried material that has been blown off and gathered at the bottom of the drum along the drum axis, and finally discharges it from its outlet end. The material is then recycled to the production line through a downstream pneumatic conveying or vibrating trough system.

[0097] S2, Intelligent Cleaning Stage:

[0098] After the material recycling phase is completed, or when manually triggered by the operator, the electrical control cabinet 8 will automatically switch to the "intelligent cleaning" program.

[0099] The electrical control cabinet 8 first starts the water pump 5 of the water supply module. After the water pressure stabilizes, it opens the electric ball valve 4, and high-pressure water (such as 15MPa) begins to be supplied.

[0100] Simultaneously, the electrical control cabinet 8 starts the geared motors 305 of the two drum cleaning devices 3 respectively. The water spray nozzle 301 of the first cleaning device located above the discharge end moves horizontally back and forth, and the high-speed rotating water curtain sprays covers the front end face of the cleaning chamber and the inner wall of the drum body; the water spray nozzle 301 of the second cleaning device located below the feed end moves back and forth along an inclined trajectory, and the water curtain sprays focuses on cleaning the rear end face and adjacent areas.

[0101] The movement of the two nozzles is coordinated with the slow rotation of the drum to ensure that the high-pressure water jet covers all inner surfaces and rakes without any blind spots. The wastewater generated during cleaning is naturally discharged from the discharge end as the drum rotates and enters the workshop drainage system.

[0102] After the preset cleaning time is reached, the electrical control cabinet 8 sequentially shuts off the electric ball valve 4, the water pump 5, and each geared motor 305, and the nozzles retract. The system issues a cleaning completion signal, and the maintenance work for the entire batch is automatically completed.

[0103] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A material recovery and intelligent cleaning system for the cylinder wall of a tobacco feeder, characterized in that, include: The drum (1) has rake nails on the inner side of its cylinder wall and can rotate around its axis; The material recycling device is installed outside the drum (1) and is used to blow off the tobacco material adhering to the inner wall of the drum (1) and send it out of the drum (1). An intelligent cleaning device is installed on the outside of the roller (1) for high-pressure water cleaning of the inner wall of the roller (1); And an electrical control cabinet (8), which is electrically connected to the material recycling device and the intelligent cleaning device respectively, for controlling the two to run automatically in sequence according to a preset program; The material recovery device includes an air compressor jetting device (2) disposed outside the drum (1) and a variable frequency blower (9). The air compressor jetting device (2) is used to spray compressed air into the inner wall of the drum (1) to blow off the material, and the variable frequency blower (9) is used to send airflow into the drum (1) to send the blown-off material out of the drum (1). The intelligent cleaning device includes a drum cleaning device (3) disposed outside the drum (1) and a water supply module for supplying water to the drum cleaning device (3).

2. The tobacco feeder cylinder wall material recovery and intelligent cleaning system according to claim 1, characterized in that, The compressed air injection device (2) includes: The mounting base (208) is fixedly installed above the feed end of the roller (1); A slide (204) is horizontally mounted on the mounting base (208); A slide table (203) is slidably disposed on the slide frame (204); A jetting assembly is fixedly connected to the slide table (203) and can move axially along the slide frame (204) together with it. The jetting assembly includes an air duct (202) and a pressurized nozzle (201) installed at the end of the air duct (202). A geared motor (205) is fixedly installed at one end of the slide (204). The output shaft of the geared motor (205) is connected to the slide (203) through a transmission mechanism to drive its movement. The air duct (202) is connected to an external compressed air source via a connecting pipe (210).

3. The tobacco feeder cylinder wall material recovery and intelligent cleaning system according to claim 2, characterized in that, On the connecting pipe (210) between the air duct (202) and the external compressed air source, a manual ball valve (207) and a solenoid valve (206) controlled by the electrical control cabinet (8) are sequentially installed.

4. The tobacco feeder cylinder wall material recovery and intelligent cleaning system according to claim 3, characterized in that, The pressurized nozzle (201) is a conical rotating nozzle.

5. The tobacco feeder cylinder wall material recovery and intelligent cleaning system according to claim 1, characterized in that, The outlet of the variable frequency blower (9) is divided into a first branch (901) and a second branch (902) through a pipeline. The first branch (901) is connected to the feed end side wall of the roller (1), and the second branch (902) is connected to the discharge end side wall of the roller (1).

6. The tobacco feeder cylinder wall material recovery and intelligent cleaning system according to claim 5, characterized in that, Solenoid valve 2 (903) and solenoid valve 3 (904) controlled by the electrical control cabinet (8) are respectively installed on the first branch (901) and the second branch (902).

7. The tobacco feeder cylinder wall material recovery and intelligent cleaning system according to claim 1, characterized in that, The cylinder cleaning device (3) includes: Mounting bracket (308); The second slide (304) is mounted on the mounting bracket (308). Slide table 2 (303) is slidably disposed on slide frame 2 (304); A water spraying assembly is fixedly connected to the slide table 2 (303) and can move along the slide frame 2 (304) together with it. The water spraying assembly includes a water spray pipe (302) and a water spray nozzle (301) installed at one end of the water spray pipe (302). The water spray nozzle (301) is a four-cone rotating nozzle, and each cone surface is provided with a spray hole. A geared motor 2 (305) is fixedly installed at the end of the slide 2 (304). The output shaft of the geared motor 2 (305) is connected to the slide 2 (303) through a transmission mechanism to drive its movement. The other end of the water spray pipe (302) is provided with a water receiving end (306), and is connected to the water supply module through a metal hose.

8. The tobacco feeder cylinder wall material recovery and intelligent cleaning system according to claim 7, characterized in that, The number of the cylinder cleaning devices (3) is two; One of them has its mounting bracket (308) horizontally fixed on the frame or housing of the discharge end of the roller (1) and located above the discharge end, so that the movement trajectory of the water spray nozzle (301) is parallel to the axis of the roller (1). Another one has its mounting bracket (308) fixed at an angle to the frame or housing of the feed end of the roller (1) and located below the feed end, so that the movement trajectory of the water spray nozzle (301) is inclined to the axis of the roller (1).

9. A tobacco feeder cylinder wall material recovery and intelligent cleaning system according to claim 8, characterized in that, The water supply module includes a water storage tank (7), a filter (6), a water pump (5), and a water supply pipeline; the inlet of the water pump (5) is connected to the water storage tank (7) through the water supply pipeline via the filter (6), and the outlet is connected to the water receiving end (306) of the cylinder cleaning device (3) through a high-pressure hose (10); The water storage tank (7) is equipped with a float level gauge (701), and the top of the water storage tank (7) is equipped with a water supply pipe (702). An electric ball valve (4) controlled by the electrical control cabinet (8) is installed on the high-pressure hose (10) between the water pump (5) and the water inlet (306).

10. A method for recovering and intelligently cleaning the material on the cylinder wall of a tobacco feeder based on the system described in any one of claims 1-9, characterized in that, The following steps are automatically executed by the electrical control cabinet (8) according to a preset program: S1. Material recovery steps: Control the start of the geared motor (205) of the compressed air blowing device (2), drive the booster nozzle (201) to extend into the rotating drum (1) and move along its axial direction, and at the same time control the opening of the solenoid valve (206) to spray compressed air into the inner wall of the drum (1) to blow off the adhering material; then control the start of the variable frequency blower (9), and control the opening of the solenoid valve (903) and / or the solenoid valve (904) to send airflow into the drum (1) and send the blown material out of the drum (1) for recovery; S2, Intelligent cleaning steps: After the material recycling step is completed, start the water pump (5) of the water supply module and control the electric ball valve (4) to open; The two geared motors (305) of the two drum cleaning devices (3) are started respectively, driving their respective water spray nozzles (301) to move back and forth along their corresponding movement trajectory, and spraying high-pressure water jets onto the inner wall of the drum (1) for cleaning through the water spray nozzles (301).

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