A toter cleaning device

Abstract

This application discloses a cleaning device for a turnover box, relating to the field of tobacco machinery, including a blowing mechanism, an air supply mechanism, and a lifting mechanism. The blowing mechanism consists of an annular nozzle and a coaxial internal distribution chamber. The annular nozzle has circumferentially distributed first air jet holes on its outer periphery, and the bottom surface of the distribution chamber protrudes outwards with second air jet holes arranged thereon. The two are connected by a circumferential connecting pipe. The air supply mechanism connects an external air source to the top of the distribution chamber. The lifting mechanism drives the blowing mechanism to move vertically up and down. During operation, the first and second air jet holes work together to blow air, forming a multi-angle high-pressure airflow network in conjunction with the lifting motion, directly cleaning the screen surface and pore debris. Compared to manual brushing or air gun operation, this device, through gradient aperture design and automated lifting control, significantly shortens the cleaning time, replaces inefficient manual operation in high-temperature and high-noise environments, solves the problem of production interruption caused by low efficiency of manual cleaning, and reduces labor intensity and operational risks.

Description

Technical Field

[0001] This application relates to the field of tobacco machinery technology, and in particular to a turnover box cleaning device. Background Technology

[0002] In the tobacco processing industry, the turnover box is a key carrier in the vacuum rehumidification process. It is used to hold tobacco bales and transport them via logistics tracks to the vacuum rehumidification chamber for vacuuming and humidification. The turnover box has multiple screen structures, which serve to both fix the tobacco bales to ensure uniform steam penetration and facilitate the flow of moisture during processing. However, in the high-temperature and high-humidity steam environment, tobacco bales easily scatter debris upon contact with steam, and a large amount of tobacco leaf debris adheres to the screen surface. Especially during the cooling stage after vacuum rehumidification, residual moisture makes the debris adhere even more firmly, leading to screen blockage.

[0003] Currently, tobacco debris adhering to the screens of the turnover boxes needs to be cleaned manually. In practice, workers must climb to a high platform and use brushes, air guns, and other tools to clean each turnover box's screen layer by layer. Each production batch involves approximately 20 turnover boxes, and cleaning a single box takes about ten minutes. The total cleaning time for a single batch is long, causing frequent production interruptions and severely restricting processing efficiency. Furthermore, operators must work continuously in high-temperature (above 50°C) and high-noise (equipment operating noise exceeds 85 decibels) environments, resulting in high labor intensity and fatigue, further reducing cleaning quality and safety.

[0004] Therefore, this application proposes a turnover box cleaning device that can replace manual labor in cleaning turnover boxes and improve the cleaning efficiency of turnover boxes. Utility Model Content

[0005] The main purpose of this application is to provide a turnover box cleaning device, which aims to solve the technical problem of low efficiency in manual cleaning of turnover boxes.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A turnover box cleaning device, comprising:

[0008] The jetting mechanism includes an annular nozzle and a flow divider coaxially disposed on the inner circumference of the annular nozzle. The inner circumferential sidewall of the annular nozzle is connected to the sidewall of the flow divider through at least two circumferentially spaced connecting pipes. The outer circumferential sidewall of the annular nozzle is provided with a plurality of first jet holes spaced circumferentially. The bottom surface of the flow divider has an outward convex structure and a plurality of second jet holes are distributed circumferentially.

[0009] The gas supply mechanism has its input end connected to an external gas source and its output end connected to the top of the distribution chamber;

[0010] A lifting mechanism is provided on an external support device and its lifting end is fixedly connected to the air supply mechanism. It is used to drive the annular nozzle and the diversion chamber to rise / fall vertically in sync by driving the air supply mechanism.

[0011] As a further improvement of this application, along the circumferential region between two adjacent connecting pipes, the diameter of the first jet hole gradually increases from both ends to the middle; a preset angle is provided between the axis of each first jet hole and the central axis of the annular nozzle; the diameter of the second jet hole is smaller than the minimum diameter of the first jet hole.

[0012] As a further improvement of this application, the gas supply mechanism includes a gas pipeline and a pressure vessel; the gas pipeline is arranged vertically, with its bottom end connected to the top of the diversion chamber and its top end connected to the outlet of the pressure vessel, and the inlet of the pressure vessel connected to an external gas source.

[0013] As a further improvement of this application, the gas supply mechanism further includes a solenoid valve and a pressure relief valve. The solenoid valve is located at the top of the gas supply pipe; the pressure relief valve is located on the gas supply pipe and between the solenoid valve and the diversion chamber, and is used to automatically open and release pressure when the gas pressure in the gas supply pipe exceeds a set threshold.

[0014] As a further improvement of this application, the lifting mechanism includes a cylinder fixed to an external support device. The moving direction of the cylinder's movable end is parallel to the central axis of the annular nozzle and is connected to one end of a support plate. The other end of the support plate is fixedly connected to the side wall of the pressure vessel and the top of the gas delivery pipe through a first bracket and a second bracket, respectively. By driving the cylinder to extend and retract, the annular nozzle and the diversion chamber are driven to extend into or out of the turnover box in a vertical direction.

[0015] As a further improvement of this application, the turnover box cleaning device also includes a monitoring mechanism; the monitoring mechanism includes a pressure sensor disposed on the air supply pipe and a photoelectric sensor disposed on the support plate, the pressure sensor being used to monitor the air pressure in the air supply pipe in real time, and the photoelectric sensor being used to detect whether the turnover box has entered the preset working area below the annular nozzle.

[0016] As a further improvement of this application, the turnover box cleaning device further includes a control mechanism electrically connected to the cylinder, the solenoid valve, the pressure relief valve, the pressure sensor, and the photoelectric sensor respectively; the control mechanism has a pre-stored air pressure safety threshold and is configured to: when the photoelectric sensor detects that the turnover box has entered the working area and the pressure sensor detects that the air pressure is lower than the safety threshold, open the solenoid valve and drive the cylinder to extend; if the air pressure exceeds the limit, open the pressure relief valve; if the photoelectric sensor detects that the turnover box has left the working area, drive the cylinder to retract.

[0017] The technical solution provided in this application may include the following beneficial effects:

[0018] During use, this application utilizes a combination of circumferentially distributed first air jet holes in an annular nozzle and second air jet holes at the bottom of the diversion chamber to spray air. A lifting mechanism drives the spraying mechanism to move vertically, creating a multi-angle, full-area high-pressure airflow impact network that directly and automatically cleans the screen surface and pores. Compared to manual layer-by-layer brushing or fixed-point air gun cleaning, this device, through its gradient aperture design and continuous lifting mechanism, significantly shortens the cleaning time of the turnover box, completely replacing the inefficient manual work in high-temperature and high-noise environments. It solves the core problems of low efficiency and long processing time caused by manual cleaning, leading to frequent production interruptions, while also reducing labor intensity and operational risks. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of a turnover box cleaning device;

[0021] Figure 2 yes Figure 1 A three-dimensional structural diagram of the central jet blowing mechanism;

[0022] Figure 3 yes Figure 1 Right sectional view of the central jetting mechanism;

[0023] Figure 4 This is a partial three-dimensional structural diagram of a turnover box cleaning device;

[0024] Figure label:

[0025] 1. Injection mechanism; 11. Annular nozzle; 11a. First air jet hole; 12. Diverter chamber; 12a. Second air jet hole; 13. Connecting pipe; 14. Preset angle; 2. Air supply mechanism; 21. Air delivery pipe; 22. Pressure vessel; 23. Solenoid valve; 24. Pressure relief valve; 3. Lifting mechanism; 31. Cylinder; 32. Support plate; 33. First bracket; 34. Second bracket; 4. Monitoring mechanism; 41. Pressure sensor; 42. Photoelectric sensor. Detailed Implementation

[0026] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0031] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

[0032] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0033] Figure 1 An embodiment of a turnover box cleaning device of this application is shown, see [link to relevant documentation]. Figure 1 In this embodiment, the turnover box cleaning device includes: a blowing mechanism 1, an air supply mechanism 2, and a lifting mechanism 3.

[0034] Among them, see Figure 1 and Figure 2 The spraying mechanism 1 includes an annular nozzle 11 and a diversion chamber 12 coaxially disposed on the inner circumference of the annular nozzle 11. The inner circumferential sidewall of the annular nozzle 11 is connected to the sidewall of the diversion chamber 12 through at least two circumferentially spaced connecting pipes 13. The outer circumferential sidewall of the annular nozzle 11 is provided with a plurality of first air jet holes 11a spaced along the circumferential direction. The bottom surface of the diversion chamber 12 has an outward convex structure and a plurality of second air jet holes 12a are distributed circumferentially. The input end of the air supply mechanism 2 is connected to an external air source, and the output end is connected to the top of the diversion chamber 12. The lifting mechanism 3 is disposed on an external bearing device, and its lifting end is fixedly connected to the air supply mechanism 2, for driving the annular nozzle 11 and the diversion chamber 12 to rise / fall in the vertical direction synchronously by driving the air supply mechanism 2. In actual use, the combined action of the blowing mechanism 1 and the lifting mechanism 3 enables all-round automated blowing cleaning of debris on the surface of the turnover box screen, significantly improving cleaning efficiency and avoiding high-risk manual operation in high-temperature and high-noise environments. At the same time, the multi-directional air jet design of the annular nozzle 11 and the diversion chamber 12 can efficiently remove stubborn debris in the screen pores, ensuring the smooth circulation of the turnover box.

[0035] Further, see Figure 2 Along the circumferential region between two adjacent connecting pipes 13, the diameter of the first jet hole 11a gradually increases from both ends to the middle, and the diameter of the second jet hole 12a is smaller than the minimum diameter of the first jet hole 11a. Through the gradient increasing aperture layout, an alternating strong and weak airflow coverage network is formed in the annular nozzle 11 region between adjacent connecting pipes 13, effectively eliminating the jetting blind zone. Combined with the directional penetration of the high-pressure airflow with small aperture on the bottom surface of the diversion chamber 12 into the screen pores, it can simultaneously achieve rapid stripping of large particles and deep removal of fine particles, significantly improving the cleanliness of the screen.

[0036] Further, see Figure 3 Each first jet hole 11a has a preset angle 14 between its axis and the central axis of the annular nozzle 11. The preset angle 14 is [60°, 75°], which makes the inclined jet airflow form a composite impact component on the screen surface. The horizontal component can laterally peel off large areas of loose debris, while the vertical component enhances the longitudinal penetration of debris adhering to the screen hole wall. Combined with the circumferential rotation and lifting motion of the annular nozzle 11, three-dimensional debris removal is achieved, effectively solving the problem of secondary debris deposition caused by traditional vertical jetting.

[0037] It should be noted that a tilt angle of 60°-75° decomposes the single-hole airflow into horizontal and vertical components (e.g., at 60°, the horizontal component accounts for 50% and the vertical component accounts for 86.6%). The horizontal airflow can expand the coverage width of the single hole, while the vertical airflow enhances the local impact pressure. The two work together to improve the debris removal efficiency. If the included angle is <60°, the vertical component accounts for too high a proportion, which can easily cause debris to be pressed into the depth of the screen pores. If the included angle is >75°, the horizontal component accounts for too low a proportion, making it difficult to form an effective stripping airflow.

[0038] In an optional embodiment, the first jet hole 11a in the circumferential region between two adjacent connecting pipes 13 has a maximum diameter in the middle that is 1.2 to 1.5 times the diameter at both ends, forming a gradient distribution of airflow intensity that is strong in the middle and gradually weakens at both ends. This not only compensates for the pressure attenuation in the middle of the annular nozzle 11 caused by the diversion of the connecting pipe 13, preventing debris from accumulating in the gap of the connecting pipe 13 and forming a cleaning blind zone, but also maintains the airflow coverage density in the edge region through the smaller diameter at both ends, achieving a balanced distribution of circumferential airflow energy, thereby improving the debris removal rate while reducing air source consumption.

[0039] Further, see Figure 4The gas supply mechanism 2 includes a gas delivery pipe 21 and a pressure vessel 22. The gas delivery pipe 21 is arranged vertically, with its bottom end connected to the top of the distribution chamber 12 and its top end connected to the outlet of the pressure vessel 22. The inlet of the pressure vessel 22 is connected to an external gas source. By setting up the vertical gas delivery pipe 21 and the pressure vessel 22, the gas supply mechanism 2 can provide high-pressure gas to the blowing mechanism 1 with a stable and continuous airflow. The design of the vertical gas delivery pipe 21 reduces the bending resistance during gas transportation, reduces pressure loss, and ensures that the airflow is delivered to the distribution chamber 12 evenly and efficiently. The introduction of the pressure vessel 22 can store and buffer the pressure fluctuations of the external gas source, maintain the stability of the air pressure during blowing, and thus improve the continuity and reliability of the cleaning operation. This structure simplifies the gas path layout, facilitates coordinated operation with the lifting mechanism 3, and reduces the complexity of equipment maintenance.

[0040] It should be noted that the pressure vessel 22 dynamically adjusts the gas supply relationship between the external gas source input and the blowing mechanism 1 through an internal pressure balancing mechanism. Its core function is to buffer gas source pressure fluctuations and maintain the stability of the output gas pressure. During operation, the pressure vessel 22 compensates for instantaneous flow changes during the blowing process by absorbing or releasing gas in real time, ensuring that the airflow pressure between the diversion chamber 12 and the annular nozzle 11 is uniform and continuous.

[0041] Further, see Figure 4 The gas supply mechanism 2 also includes a solenoid valve 23 and a pressure relief valve 24. The solenoid valve 23 is located at the top of the gas supply pipe 21; the pressure relief valve 24 is located on the gas supply pipe 21, between the solenoid valve 23 and the diversion chamber 12, and is used to automatically open and release pressure when the gas pressure in the gas supply pipe 21 exceeds a set threshold. By setting the solenoid valve 23 and the pressure relief valve 24, the solenoid valve 23 precisely controls the gas flow to reduce energy consumption and achieve automated operation, while the pressure relief valve 24 automatically releases pressure when the gas pressure in the gas supply pipe 21 exceeds the limit, effectively preventing the risk of system overpressure, ensuring equipment safety and the stable and continuous cleaning process, while reducing the need for manual intervention.

[0042] Further, see Figure 4The lifting mechanism 3 includes a cylinder 31 fixed to an external support device. The moving end of the cylinder 31 moves parallel to the central axis of the annular nozzle 11 and is connected to one end of a support plate 32. The other end of the support plate 32 is fixedly connected to the side wall of the pressure vessel 22 and the top of the air supply pipe 21 via a first bracket 33 and a second bracket 34, respectively. By driving the cylinder 31 to extend and retract, the annular nozzle 11 and the diversion chamber 12 are driven to extend or retract vertically into or out of the turnover box. Through the linkage design of the cylinder 31 and the support plate 32, the blowing mechanism 1 is driven to precisely lift and lower along the central axis of the annular nozzle 11, ensuring that the blowing airflow vertically covers the surface of the turnover box screen. At the same time, it simplifies the mechanical transmission path, reduces motion deviation, improves the positioning accuracy and reliability of the cleaning operation, and adapts to the efficient cleaning needs of turnover boxes of different sizes.

[0043] Further, see Figure 4 The turnover box cleaning device also includes a monitoring mechanism 4. The monitoring mechanism 4 includes a pressure sensor 41 mounted on the air supply pipe 21 and a photoelectric sensor 42 mounted on the support plate 32. The pressure sensor 41 monitors the air pressure inside the air supply pipe 21 in real time, and the photoelectric sensor 42 detects whether the turnover box has entered the preset working area below the annular nozzle 11. By monitoring the air pressure inside the air supply pipe 21 in real time with the pressure sensor 41 and detecting the position of the turnover box with the photoelectric sensor 42, precise linkage control of air supply start / stop and lifting actions is achieved. This ensures the stability and safety of the blowing air pressure and ensures that the device only automatically starts when the turnover box is in place, effectively avoiding misoperation and energy waste, and improving the intelligence and efficiency of the cleaning process.

[0044] Furthermore, the turnover box cleaning device also includes a control mechanism electrically connected to the cylinder 31, solenoid valve 23, pressure relief valve 24, pressure sensor 41, and photoelectric sensor 42, respectively. The control mechanism has a pre-stored air pressure safety threshold and is configured to: when the photoelectric sensor 42 detects that the turnover box has entered the working area and the pressure sensor 41 detects that the air pressure is lower than the safety threshold, open the solenoid valve 23 and drive the cylinder 31 to extend; if the air pressure exceeds the limit, open the pressure relief valve 24; if the photoelectric sensor 42 detects that the turnover box has left the working area, drive the cylinder 31 to retract. Through the intelligent judgment of the air pressure threshold and the position of the turnover box by the control mechanism, the entire process of air supply, lifting, and pressure relief is automated and closed-loop controlled. This ensures that the cleaning process strictly follows the safe air pressure range, avoiding the risk of equipment overload or underpressure, and significantly improves the continuity of operation and energy utilization by dynamically responding to the entry and exit status of the turnover box, while completely eliminating the need for manual intervention.

[0045] In one optional embodiment, the control mechanism includes a programmable logic controller (PLC) and a matching input / output module. The PLC receives the air pressure signal from the pressure sensor 41 and the position signal from the photoelectric sensor 42 through a preset program, and generates control commands based on the air pressure safety threshold and the position status of the turnover box: when the turnover box enters the working area and the air pressure is lower than the threshold, the PLC triggers the solenoid valve 23 to open and drives the cylinder 31 to extend; if the air pressure exceeds the threshold, the pressure relief valve 24 is automatically activated; after the turnover box leaves, the PLC controls the cylinder 31 to retract and close the solenoid valve 23. In addition, the control mechanism can be expanded to integrate a human-machine interface (HMI) for real-time display of operating parameters and fault alarm information, and supports switching between manual and automatic modes, thereby realizing flexible control and remote monitoring of the cleaning process.

[0046] It should be noted that the core of this embodiment lies in constructing a highly efficient automated rejection system for defective cigarette packs through the synergistic application of standard components in the prior art (cylinder 31, solenoid valve 23, pressure relief valve 24, pressure sensor 41, photoelectric sensor 42, and control mechanism). The specific structures of the components (such as the piston-cylinder structure of cylinder 31, the coil-valve core assembly of solenoid valve 23, the valve body and spring adjustment mechanism of pressure relief valve 24, the pressure-sensitive element and circuit module of pressure sensor 41, the transmitter-receiver pair of photoelectric sensor 42, and the programmable logic controller (PLC) of the control mechanism) are all implemented using mature technologies known in the art. Their internal structure and manufacturing details have been widely disclosed in existing technical documents or commercial products, and therefore will not be repeated here.

[0047] For example, the method for cleaning a turnover box includes the following steps:

[0048] Step 1: System Initialization

[0049] 1) Equipment self-test: The control mechanism (such as PLC) starts the self-test program to check the communication status of solenoid valve 23, cylinder 31, pressure sensor 41, photoelectric sensor 42 and pressure relief valve 24, and confirm that each component is operating normally.

[0050] 2) Initial air pressure verification: The initial air pressure value in the air supply pipe 21 is read by the pressure sensor 41. If the air pressure is within the preset safety threshold range, the pressure relief valve 24 remains closed.

[0051] 3) The lifting mechanism 3 is reset, and the drive cylinder 31 is retracted to the initial height to ensure that the spraying mechanism 1 (annular nozzle 11 and diversion chamber 12) exits the working area of ​​the turnover box.

[0052] Step 2: Detection and triggering of the arrival of the turnover box

[0053] 1) Real-time position monitoring: The photoelectric sensor 42 continuously scans the conveyor line. When it detects that the turnover box has entered the preset working area below the annular nozzle 11, it sends a position signal to the control mechanism.

[0054] 2) Process start determination: After receiving the position signal, the control mechanism locks the position of the turnover box and activates the cleaning program.

[0055] Step 3: Dynamic air pressure adjustment and positioning of jetting mechanism 1

[0056] 1) Pressure threshold verification: The control mechanism reads data from pressure sensor 41 in real time.

[0057] If the air pressure is lower than the safety threshold, immediately open the solenoid valve 23 and supply air to the pressure vessel 22 from the external air source.

[0058] If the air pressure is normal, proceed directly to the blowing stage;

[0059] 2) The spraying mechanism 1 descends and controls the synchronous drive cylinder 31 to extend at a uniform speed, driving the annular nozzle 11 and the diversion chamber 12 to descend vertically until the first air jet hole 11a maintains a preset distance (adapted to the screen layer height) from the surface of the turnover box screen.

[0060] Step 4: Multi-directional jet cleaning execution

[0061] 1) Composite airflow injection maintains the solenoid valve 23 in the open state. High-pressure gas is distributed through the splitter chamber 12 to the first jet hole 11a (orifice gradient design) of the annular nozzle 11 and the second jet hole 12a (small-aperture high-pressure airflow) at the bottom of the splitter chamber 12, forming a multi-angle impact airflow:

[0062] First jet hole 11a: Inclined jet (60°-75°) covers the screen surface, stripping away loose debris;

[0063] Second air jet 12a: Vertical jetting penetrates the screen mesh to remove deep, stubborn debris;

[0064] 2) Dynamic height adjustment: The control mechanism controls the cylinder 31 to lift and lower in stages according to the preset program or real-time feedback (such as cleaning progress signal), covering different height areas of the screen layer by layer to ensure no blind spots in cleaning.

[0065] Step 5: Pressure Safety Monitoring and Abnormal Handling

[0066] 1) Real-time air pressure feedback: Pressure sensor 41 continuously monitors the air pressure in air supply pipe 21, and the data is transmitted to the control mechanism in real time.

[0067] 2) Overpressure protection mechanism: If the air pressure exceeds the safety threshold:

[0068] Immediately trigger pressure relief valve 24 to open and release pressure until the air pressure returns to a safe range;

[0069] If the air pressure remains abnormal after depressurization (such as continuous overpressure or air source failure), the control mechanism closes solenoid valve 23 and triggers an audible and visual alarm, terminating the cleaning process.

[0070] Step 6: Cleaning complete and equipment reset

[0071] 1) Turntable removal detection: After the photoelectric sensor 42 detects that the turnover box has been completely removed from the working area, it sends a signal to the control mechanism;

[0072] 2) When the air supply stops and the mechanism resets, the control mechanism closes the solenoid valve 23 to cut off the air supply; the drive cylinder 31 retracts the blowing mechanism 1 to the initial height, preparing for the next cleaning cycle.

[0073] Step 7: Anomaly Handling and Manual Intervention

[0074] 1) Fault alarm and locking: If air pressure runaway, sensor failure or mechanical jamming is detected, the control mechanism will immediately lock the equipment and display the fault code and suggested handling measures through the human-machine interface (HMI).

[0075] 2) Manual mode switching: Operators can switch to manual mode via the HMI and perform the following operations:

[0076] Forcefully reset cylinder 31 to its original position;

[0077] Manually adjust the air pressure threshold or the blowing duration;

[0078] Restore automatic operation after restarting the system or troubleshooting.

[0079] In this embodiment, the turnover box cleaning device achieves fully automated and efficient cleaning through the multi-directional gradient air jet design of the annular nozzle 11 and the diversion chamber 12, the dynamic air pressure regulation of the pressure vessel 22 and the pressure relief valve 24, and the closed-loop linkage control of the photoelectric and pressure sensor 41, completely replacing the high-risk manual operation. The synergistic effect of its tilting nozzle and lifting mechanism 3 can accurately cover the screen surface and pores, improving the cleaning efficiency by more than 3 times compared to manual cleaning. At the same time, through air pressure threshold management, abnormal alarm and modular design, it significantly reduces energy consumption and maintenance costs, adapts to the continuous production needs of turnover boxes of different sizes, and provides a safe, intelligent and highly compatible solution for the tobacco processing industry.

[0080] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by this application; the dimensions of the drawings are not related to the specific physical object, and the physical object dimensions can be arbitrarily changed.

Claims

1. A pallet cleaning apparatus, characterized by, include: The jetting mechanism (1) includes an annular nozzle (11) and a flow divider (12) coaxially disposed on the inner circumference of the annular nozzle (11). The inner circumferential sidewall of the annular nozzle (11) is connected to the sidewall of the flow divider (12) through at least two circumferentially spaced connecting pipes (13). The outer circumferential sidewall of the annular nozzle (11) is provided with a plurality of first jet holes (11a) spaced circumferentially. The bottom surface of the flow divider (12) has an outward convex structure and a plurality of second jet holes (12a) are distributed circumferentially. The gas supply mechanism (2) has its input end connected to an external gas source and its output end connected to the top of the diversion chamber (12); The lifting mechanism (3) is located on the external support equipment and its lifting end is fixedly connected to the air supply mechanism (2). It is used to drive the annular nozzle (11) and the diversion chamber (12) to rise / fall in the vertical direction simultaneously by driving the air supply mechanism (2).

2. The tote cleaning apparatus of claim 1, wherein, Along the circumferential region between two adjacent connecting pipes (13), the diameter of the first jet hole (11a) gradually increases from both ends to the middle; a preset angle (14) is provided between the axis of each first jet hole (11a) and the central axis of the annular nozzle (11); the diameter of the second jet hole (12a) is smaller than the minimum diameter of the first jet hole (11a).

3. The tote cleaning apparatus of claim 1, wherein, The gas supply mechanism (2) includes a gas transmission pipe (21) and a pressure vessel (22); the gas transmission pipe (21) is arranged in a vertical direction, with its bottom end connected to the top of the diversion chamber (12) and its top end connected to the outlet of the pressure vessel (22), and the inlet of the pressure vessel (22) connected to an external gas source.

4. The tote cleaning apparatus of claim 3, wherein, The gas supply mechanism (2) also includes a solenoid valve (23) and a pressure relief valve (24). The solenoid valve (23) is located at the top of the gas supply pipe (21). The pressure relief valve (24) is located on the gas supply pipe (21) and between the solenoid valve (23) and the diversion chamber (12). It is used to automatically open and release pressure when the gas pressure in the gas supply pipe (21) exceeds a set threshold.

5. The turnover box cleaning device according to claim 4, characterized in that, The lifting mechanism (3) includes a cylinder (31) fixed on an external support device. The moving direction of the cylinder (31) is parallel to the central axis of the annular nozzle (11) and connected to one end of a support plate (32). The other end of the support plate (32) is fixedly connected to the side wall of the pressure vessel (22) and the top end of the gas delivery pipe (21) through the first bracket (33) and the second bracket (34), respectively. By driving the cylinder (31) to extend and retract, the annular nozzle (11) and the diversion chamber (12) are driven to extend into or out of the turnover box in the vertical direction.

6. The tote cleaning apparatus of claim 5, wherein, It also includes a monitoring mechanism (4); the monitoring mechanism (4) includes a pressure sensor (41) installed on the gas pipe (21) and a photoelectric sensor (42) installed on the support plate (32). The pressure sensor (41) is used to monitor the gas pressure in the gas pipe (21) in real time, and the photoelectric sensor (42) is used to detect whether the turnover box enters the preset working area below the annular nozzle (11).

7. The tote cleaning apparatus of claim 6, wherein, It also includes a control mechanism electrically connected to the cylinder (31), the solenoid valve (23), the pressure relief valve (24), the pressure sensor (41), and the photoelectric sensor (42), respectively. The control mechanism has a pre-stored air pressure safety threshold and is configured to: when the photoelectric sensor (42) detects that the turnover box enters the working area and the pressure sensor (41) detects that the air pressure is lower than the safety threshold, open the solenoid valve (23) and drive the cylinder (31) to extend; if the air pressure exceeds the limit, open the pressure relief valve (24); if the photoelectric sensor (42) detects that the turnover box leaves the working area, drive the cylinder (31) to retract.

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