Glue supply device and method for cigarette making machine

Abstract

The invention discloses a cigarette making machine glue supply device and method, and belongs to the technical field of tobacco machinery. The device comprises a glue barrel, a movable barrel cover unit and a glue solution conveying unit. The movable barrel cover unit comprises a cover body, a sealing gasket, an electromagnetic valve, an air pressure adjusting pump and a liquid level detector, and reliable sealing and bubble elimination are achieved by establishing a negative pressure environment. And the glue solution conveying unit is used for conveying the glue solution to the glue supply gear pump. The glue barrel is rapidly replaced through the design of the movable barrel cover, potential safety hazards caused by traditional disassembly and cleaning are avoided, and the glue barrel has the advantages of being safe to operate and easy and convenient to maintain.

Description

Technical Field

[0001] This application relates to the field of tobacco machinery technology, specifically to a glue supply device and method for a cigarette machine. Background Technology

[0002] As a key piece of equipment in the tobacco manufacturing process, the performance of cigarette machines directly affects the quality of cigarette products, material consumption, and production efficiency. Among the many subsystems of a cigarette machine, the adhesive supply system is responsible for stably and evenly supplying adhesive to the cigarette forming area, and its reliability is crucial. Currently, the industry commonly uses positive pressure adhesive supply technology in mainstream models such as the ZJ116. This solution relies on a specially designed metal adhesive supply tank. By continuously introducing compressed air at a constant pressure into the tank, the air pressure forces the adhesive liquid inside the tank through a delivery pipeline to a high-speed spray nozzle, thereby completing the coating operation on the cigarette paper seam.

[0003] However, this traditional glue supply model, centered on dedicated metal glue drums, has revealed a structural flaw in long-term application. Because the glue supply system and the drum are rigidly and permanently connected, and the drum itself is part of the system's pressure vessel, a cumbersome drum-changing operation is required every time the glue is used up. Operators must first disassemble the air and glue lines connected to the drum lid, then move the heavy empty metal drum to the cleaning area for a thorough manual scrubbing with plenty of water and tools to ensure cleanliness for the next use. This process not only poses significant occupational safety risks to operators due to the weight of the 25 kg metal drum and the slippery environment caused by residual glue, but also constitutes a huge, repetitive human burden, becoming a pain point restricting production line efficiency and humanized management.

[0004] Therefore, this application proposes a glue supply device and method for cigarette machines, which can fundamentally eliminate the safety risks and heavy labor faced by operators during glue tank replacement and maintenance. Summary of the Invention

[0005] The main objective of this application is to provide a glue supply device and method for cigarette machines, so as to solve the safety and efficiency bottlenecks in the glue tank replacement process of traditional glue supply systems.

[0006] To achieve the above objectives, this application provides a cigarette machine glue supply device, comprising: Glue bucket; The removable lid unit includes a lid body that snaps onto the opening of the glue bucket, a sealing gasket disposed on the inner edge of the lid body, and a solenoid valve, a pressure regulating pump, and a liquid level detector disposed on the outer end face of the lid body. The solenoid valve and the pressure regulating pump are respectively connected to the sealed space formed by the lid body and the glue bucket through air passages formed in the lid body, for evacuating or replenishing air in the sealed space. The detection end of the liquid level detector extends into the sealed space for detecting the liquid level in the glue bucket. The adhesive delivery unit is used to deliver the adhesive in the enclosed space to the adhesive supply gear pump of the cigarette machine.

[0007] Beneficial effects: This application utilizes an innovative design with a relocatable lid unit, integrating the lid, sealing gasket, solenoid valve, pressure regulating pump, and level detector into a single, relocatable functional module, enabling plug-and-play replacement of the glue canister. This not only fundamentally eliminates the safety risks and heavy operational burden associated with the traditional glue supply system requiring disassembly and cleaning of the glue canister, but also, through the coordinated operation of the pressure regulating pump and controlled solenoid valve, allows for more precise and reliable establishment and release of negative pressure seal between the lid and the glue canister. This design enables the system to quickly generate a stable negative pressure to assist in sealing and defoaming when needed, and to restore a normal pressure environment during the glue supply phase, creating conditions for stable subsequent glue delivery. This further enhances the operational safety, control flexibility, and operational reliability of the glue supply system while preventing glue skinning and leakage.

[0008] As a further improvement of this application, the adhesive delivery unit includes a first delivery pump, a suction pipe, and a delivery pipe; the input end of the suction pipe passes through the cover and extends into the sealed space, and its output end is connected to the inlet of the first delivery pump; the outlet of the first delivery pump is connected to the input end of the delivery pipe, and the output end of the delivery pipe is used to deliver adhesive to the adhesive supply gear pump.

[0009] Beneficial effects: This application, by specifically defining the structural composition and connection relationship of the adhesive delivery unit, organically integrates the adhesive extraction pipe, the first delivery pump, and the delivery pipe to form a complete and closed adhesive delivery path from the sealed space of the adhesive drum to the adhesive supply gear pump. This not only supports the quick drum-changing function of the removable drum lid unit but also ensures the continuity and stability of the adhesive during delivery, fundamentally eliminating problems such as adhesive skinning and uneven supply caused by supply interruptions or pressure fluctuations. Simultaneously, the closed pipeline design minimizes the intrusion of impurities and adhesive leakage, providing a crucial guarantee for the efficient and reliable operation of the entire adhesive supply system.

[0010] As a further improvement of this application, the adhesive delivery unit further includes an adhesive tank and an adhesive supply pipe; the adhesive tank is installed higher than the adhesive supply gear pump; the side wall of the adhesive tank is provided with an inlet, which is connected to the output end of the adhesive supply pipe; the bottom of the adhesive tank is provided with an outlet, which is connected to the inlet of the adhesive supply gear pump through the adhesive supply pipe.

[0011] Beneficial effects: This application constructs a stable gravity-fed adhesive supply system by adding a high-level adhesive tank between the adhesive delivery pipe and the adhesive supply gear pump. The constant pressure generated by the liquid level difference continuously supplies adhesive to the gear pump, which not only solves the problem of adhesive surface crusting caused by compressed air contact in traditional pressure adhesive supply methods, but also avoids pressure pulsation through stable static pressure delivery, improving the uniformity and consistency of adhesive application at the cigarette joint.

[0012] As a further improvement of this application, the adhesive container is mounted on the cigarette machine equipment by a fixing bracket; the top of the adhesive container is provided with an openable and closable end cap, and a filter is installed inside it.

[0013] Beneficial effects: By installing a filter inside the adhesive tank, this product effectively intercepts impurities in the adhesive. Combined with the top-openable and closable end cap design, the filter can be cleaned and maintained quickly without disassembling the pipeline, greatly improving the convenience of maintenance operations while ensuring filtration efficiency.

[0014] As a further improvement of this application, the cigarette machine glue supply device further includes a rapid glue discharge unit; the rapid glue discharge unit includes a second delivery pump and an electrically controlled drain valve; the inlet of the second delivery pump is connected to the glue supply pipe through a three-way connector, and the outlet of the second delivery pump is connected to the electrically controlled drain valve.

[0015] Beneficial effects: This application establishes a highly efficient and rapid glue discharge channel through the coordinated operation of a second delivery pump and an electrically controlled drain valve. When cleaning or emptying the pipeline is required, the flow-limited glue supply gear pump can be bypassed, and the medium can be discharged quickly and directly through the large-diameter drain valve, greatly improving equipment maintenance efficiency and production preparation speed.

[0016] As a further improvement of this application, the cigarette machine glue supply device further includes a control unit electrically connected to the solenoid valve, the air pressure regulating pump, the liquid level detector, the first delivery pump, and the second delivery pump respectively; the control unit is used to control the air pressure regulating pump to establish a negative pressure seal when the cover is fastened, to control the air pressure regulating pump to release the negative pressure seal and generate a replacement prompt when the liquid level detector detects a low glue level, and to control the first delivery pump and the second delivery pump to work together to perform rapid glue discharge when a glue discharge command is received.

[0017] Beneficial effects: This application achieves full automation of the glue supply process through integrated control of air pressure regulation, liquid level monitoring, glue delivery, and rapid glue discharge functions. The system can intelligently determine when to replace the glue tank and automatically perform operations such as seal establishment, vacuum defoaming, glue supply switching, and pipeline cleaning. This not only eliminates human error but also optimizes equipment utilization through precise coordination of various actuators.

[0018] Furthermore, to achieve the above objectives, this application provides a method for supplying adhesive to a cigarette machine, applied to the adhesive supply device for a cigarette machine as described above, the method comprising: Step S1: In response to the glue supply start signal, control the solenoid valve to close and control the air pressure regulating pump to evacuate the air in the sealed space enclosed by the cover and glue tank to establish and maintain a negative pressure environment of -0.05MPa to -0.1MPa. Step S2: After maintaining the negative pressure environment for a preset period of time, control the air pressure regulating pump to stop pumping air, and at the same time control the solenoid valve to open, so that the air pressure in the sealed space is restored to normal pressure. Step S3: Control the adhesive delivery unit to deliver adhesive to the adhesive supply gear pump of the cigarette machine; Step S4: Based on the detection data of the liquid level detector, when the liquid level value is lower than the preset threshold, control the adhesive delivery unit to stop working and issue a replacement prompt.

[0019] Beneficial effects: This application clearly separates the glue supply preparation stage from the stable operation stage by establishing a negative pressure seal, restoring normal pressure, and finally initiating the delivery process in an orderly control flow. Reliable sealing and elimination of glue air bubbles are achieved under negative pressure. Subsequently, the system is restored to normal pressure by opening a solenoid valve before glue delivery is initiated. This ensures that the glue delivery process takes place under stable normal pressure, avoiding the potential adverse effects of negative pressure on glue pumping, thus guaranteeing more stable glue supply pressure and flow. Simultaneously, precise liquid level monitoring triggers timely replacement prompts, further optimizing system energy efficiency and operational stability while ensuring continuous glue supply quality.

[0020] As a further improvement to this application, step S4, based on the detection data of the liquid level detector, controls the adhesive delivery unit to stop working and issues a replacement prompt when the liquid level value is lower than a preset threshold, including: Step S41: Continuously acquire the liquid level value detected by the liquid level detector; Step S42: When the liquid level is lower than a preset threshold, control the first delivery pump 31 to stop working and issue a warning signal to replace the glue bucket.

[0021] Beneficial effects: This application refines the liquid level monitoring and response process to construct a precise early warning mechanism for glue drum replacement. It can promptly detect the glue depletion status and automatically execute a series of linked operations, such as stopping glue supply and issuing alarms, avoiding equipment idling or product quality issues caused by glue interruption. It also provides operators with ample response time, making drum replacement operations more efficient and orderly.

[0022] As a further improvement to this application, the method further includes: Step S5: In response to the glue discharge command, control the glue delivery unit to discharge the medium in the pipeline.

[0023] Beneficial effects: This application establishes a rapid adhesive discharge step, activating a dual-pump collaborative working mode when maintenance is required, forming a highly efficient pipeline cleaning channel. This significantly increases the speed of media evacuation from the pipeline, transforming the traditional slow cleaning method relying on low-flow nozzles into rapid, centralized discharge, shortening equipment downtime for maintenance, and improving the overall utilization efficiency of the production line. Attached Figure Description

[0024] 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.

[0025] Figure 1 A schematic diagram of a three-dimensional structure of a glue supply device for a cigarette machine. Figure 1 ; Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure of the relocatable bucket lid unit Figure 1 ; Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure of the relocatable bucket lid unit Figure 2 ; Figure 4 A schematic diagram of a three-dimensional structure of a glue supply device for a cigarette machine. Figure 2 ; Figure 5 yes Figure 4 A three-dimensional structural diagram of the intermediate adhesive liquid tank; Figure 6 This is a schematic flowchart of one embodiment of a method for supplying adhesive to a cigarette rolling machine. Figure label: 1. Glue bucket; 2. Removable bucket lid unit; 21. Lid body; 22. Sealing gasket; 23. Solenoid valve; 24. Air pressure regulating pump; 25. Liquid level detector; 3. Glue delivery unit; 31. First delivery pump; 32. Glue extraction pipe; 33. Glue delivery pipe; 34. Glue tank; 341. Fixing frame; 342. End cap; 343. Filter; 35. Glue supply pipe; 4. Rapid glue discharge unit; 41. Second delivery pump; 42. Electrically controlled drain valve. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are merely some, not all, of the embodiments of this application. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0027] Example 1 Figure 1 An embodiment of a glue supply device for a cigarette machine according to this application is shown. See also Figure 1 In this embodiment, the glue supply device for the cigarette machine includes a glue tank 1, a movable lid unit 2, and a glue delivery unit 3.

[0028] Among them, see Figures 2 to 3 The removable lid unit 2 includes a lid body 21 that snaps onto the opening of the glue container 1, a sealing gasket 22 disposed on the inner edge of the lid body 21, and a solenoid valve 23, a pressure regulating pump 24, and a liquid level detector 25 disposed on the outer end face of the lid body 21. The solenoid valve 23 and the pressure regulating pump 24 are respectively connected to the sealed space enclosed by the lid body 21 and the glue container 1 through air passages formed in the lid body 21. When the lid body 21 is snapped onto the glue container 1 and a seal needs to be established, the solenoid valve 23 is first closed, and then the pressure regulating pump 24 is started to evacuate the sealed space, establishing and maintaining a negative pressure environment of -0.05MPa to -0.1MPa for a predetermined period of time. During this negative pressure maintenance phase, atmospheric pressure tightly presses the lid body 21 against the opening of the glue container 1 to form a reliable seal, while air bubbles in the glue expand, rise, and burst, thereby being effectively eliminated. When the predetermined negative pressure maintenance time ends, i.e., the debubbling action is completed, the control air pressure regulating pump 24 stops working, and at the same time, the control solenoid valve 23 opens, allowing outside air to enter the sealed space, thereby restoring the internal air pressure to normal. At this time, the cap 21 and the glue tank 1 are maintained connected by a mechanical structure, and the system is ready to proceed to the subsequent glue supply process. When it is necessary to replace the empty glue tank 1, since the internal and external pressures have been balanced, the cap 21 can be easily removed from the glue tank 1.

[0029] It should be noted that the plastic container 1 uses a standard-sized plastic container commonly used in cigarette factories. The structure of the lid 21 is compatible with the opening size of the standard plastic container 1, achieving plug-and-play compatibility. This avoids the problem of repeated cleaning required by traditional metal plastic containers 1, fundamentally eliminating safety hazards during disassembly and cleaning.

[0030] Preferably, the cover 21 can be injection molded from engineering plastic, which has high structural strength and light weight, making it easy for operators to handle. The sealing gasket 22 can be made of food-grade silicone material, which has good elasticity and corrosion resistance, and can form a reliable sealing interface between the cover 21 and the opening of the glue container 1.

[0031] Optionally, the solenoid valve 23 can be a two-position, two-normally closed solenoid valve, which has a fast response speed, good sealing performance, and can accurately control the connection between the closed space and the outside atmosphere.

[0032] Optionally, the pressure regulating pump 24 can be a diaphragm pump, which is characterized by its small size and low noise, and its pumping speed can meet the requirement of establishing the required vacuum level within 10 seconds. The pump body works in conjunction with the sealing gasket 22 to establish a stable negative pressure environment, ensuring both sealing reliability and defoaming of the adhesive.

[0033] Preferably, a pressure detection device can also be installed on the cover 21 to work in conjunction with the pressure regulating pump 24 to monitor the pressure value of the sealed space in real time, provide accurate pressure feedback to the control system, and ensure that the negative pressure environment is maintained within the optimal working range.

[0034] Optionally, the level detector 25 can be an ultrasonic level sensor with a detection accuracy of ±1mm, which can accurately identify the remaining amount of adhesive and provide a basis for automatic adhesive supply control.

[0035] Preferably, the liquid level detector 25 can be an explosion-proof ultrasonic sensor with an IP67 housing protection rating, which can effectively prevent adhesive from seeping in and ensure long-term stable operation in humid environments.

[0036] Further, see Figure 4 The adhesive delivery unit 3 includes a first delivery pump 31, a suction pipe 32, and a delivery pipe 33. The input end of the suction pipe 32 passes through the cover 21 and extends into the sealed space, while the output end is connected to the inlet of the first delivery pump 31. The outlet of the first delivery pump 31 is connected to the input end of the delivery pipe 33, and the output end of the delivery pipe 33 is used to deliver adhesive to the adhesive supply gear pump. This delivery path forms a complete closed system, preventing adhesive leakage and impurity contamination.

[0037] Optionally, the section of the glue-drawing tube 32 that extends into the glue container 1 can be made of a rigid material, with its end just touching the bottom of the container 1 to ensure sufficient glue extraction; the portion exposed above the lid 21 can be made of a flexible tube, allowing operators to easily move the lid 21 when changing the glue container 1. This ensures both glue extraction efficiency and ease of operation.

[0038] Preferably, the first delivery pump 31 can be fixed to the cigarette machine equipment via a mounting bracket to ensure the stability of the pump body during operation. The pump body is made of corrosion-resistant material, which can adapt to the chemical properties of the adhesive and ensure long-term reliable operation.

[0039] Further, see Figure 5 The adhesive delivery unit 3 also includes an adhesive tank 34 and an adhesive supply pipe 35. The adhesive tank 34 is installed higher than the adhesive supply gear pump. An inlet is located on the side wall of the adhesive tank 34, which connects to the output end of the adhesive supply pipe 33. An outlet is located at the bottom of the adhesive tank 34, which connects to the inlet of the adhesive supply gear pump via the adhesive supply pipe 35. This high-level installation utilizes the liquid level difference to generate a stable gravity-driven adhesive supply pressure, avoiding the adhesive skinning problem caused by traditional pressure-based adhesive supply methods.

[0040] Optionally, the adhesive container 34 is mounted on the cigarette making machine via a mounting bracket 341 to ensure its stability during operation. The mounting bracket 341 is adjustable, allowing for height adjustment to suit different equipment models.

[0041] Preferably, the adhesive container 34 can be made of transparent polycarbonate material, making it easy to observe the adhesive content inside. An inlet is provided on the upper side wall of the container, which can be connected to the output end of the adhesive delivery pipe 33 via a quick-connect coupling, facilitating disassembly and maintenance.

[0042] Optionally, the glue tank 34 is equipped with an openable and closable end cap 342, which contains a filter 343 for filtering out impurities in the glue. The filter 343 has a large surface area design, which extends the cleaning cycle and reduces the maintenance frequency.

[0043] Preferably, filter 343 can adopt a multi-layer composite filter structure, including a primary stainless steel filter and a high-efficiency nylon filter, with an effective filtration area of ​​250cm². The filter features a detachable design, facilitating regular cleaning and replacement, ensuring filtration effectiveness while improving maintenance convenience.

[0044] Further, see Figure 4 The cigarette machine glue supply device also includes a rapid glue discharge unit 4. The rapid glue discharge unit 4 includes a second delivery pump 41 and an electrically controlled drain valve 42. The inlet of the second delivery pump 41 is connected to the glue supply pipe 35 via a tee connector, and the outlet of the second delivery pump 41 is connected to the electrically controlled drain valve 42. When the pipeline needs cleaning, the second delivery pump 41 works in conjunction with the first delivery pump 31 to form a high-flow glue discharge channel, shortening the traditional pipeline cleaning time.

[0045] Optionally, the inlet of the second delivery pump 41 is connected to one interface of a tee connector via a connecting pipe, and the outlet is connected to an electrically controlled drain valve 42 via a discharge pipe. This allows the rapid glue discharge unit 4 to operate independently during normal glue supply without interference.

[0046] Preferably, the second delivery pump 41 can be a diaphragm pump of the same specifications as the first delivery pump 31, to ensure the commonality of parts and reduce spare parts inventory and maintenance costs.

[0047] Optionally, the electrically controlled drain valve 42 can be a solenoid valve with a response time of less than 100 milliseconds, enabling rapid opening and closing of the drain channel. The valve body is made of corrosion-resistant material to ensure long-term reliable operation in adhesive environments.

[0048] Furthermore, the cigarette machine glue supply device also includes a control unit electrically connected to the solenoid valve 23, the air pressure regulating pump 24, the liquid level detector 25, the first delivery pump 31, and the second delivery pump 41. The control unit coordinates the operation of each component through a preset program: when a signal indicating that the cover 21 is engaged is detected, the solenoid valve 23 and the air pressure regulating pump 24 are automatically controlled to close / start; when a low liquid level signal is received, the glue delivery unit is stopped and a replacement prompt is issued; when a glue discharge command is received, the two delivery pumps are simultaneously started to perform rapid glue discharge. This intelligent control significantly reduces the workload of operators and improves the stability of system operation.

[0049] Preferably, the control unit can be a programmable logic controller (PLC) to achieve precise coordinated control of various actuators through modular design. It can also be equipped with a touch-screen human-machine interface (HMI) to display the system's operating status in real time, set process parameters, and query historical data, facilitating monitoring and adjustment by operators.

[0050] It should be noted that this application focuses on the collaborative working principle among core components such as the control unit, solenoid valve 23, air pressure regulating pump 24, liquid level detector 25, first delivery pump 31, and second delivery pump 41. The specific mechanical structure of each component adopts conventional design in this field and will not be described in detail here.

[0051] In this embodiment, a complete intelligent glue supply system is formed through the organic cooperation of the movable lid unit 2, the glue delivery unit 3, the rapid glue discharge unit 4, and the control unit. This system enables rapid replacement of the glue container 1 through the movable lid unit 2, eliminating the safety hazards of disassembly and cleaning; it eliminates air bubbles in the glue while ensuring reliable sealing through a control logic of negative pressure sealing, maintaining defoaming, and restoring normal pressure; it ensures long-term stability of glue delivery through gravity-based glue supply after restoring normal pressure; and it improves maintenance efficiency through the rapid glue discharge unit 4. The coordinated work between the components improves the overall system's operational safety, ease of maintenance, and operational reliability, solving many problems existing in traditional glue supply systems.

[0052] Example 2 To achieve intelligent control of the adhesive supply process in cigarette making machines, based on the above embodiments, see... Figure 6 This embodiment provides a method for supplying adhesive to a cigarette machine, which is applied to the adhesive supply device for a cigarette machine as described above.

[0053] Specifically, the adhesive supply method includes the following steps: In step S1, in response to the glue supply start signal, the solenoid valve 23 is closed and the air pressure regulating pump 24 is controlled to evacuate the air from the sealed space enclosed by the cover 21 and the glue tank 1, establishing and maintaining a negative pressure environment of -0.05MPa to -0.1MPa.

[0054] In actual operation, the glue supply start signal can be triggered by the operator via the start button on the control panel, or it can be automatically generated by the sensor that detects the complete engagement of the cover 21 and the glue tank 1. After receiving the start signal, the control unit first outputs a command to close the solenoid valve 23 to isolate the sealed space from the outside atmosphere, and then drives the air pressure regulating pump 24 to start working. Air is pumped into the sealed space through the air passage inside the cover 21 to establish a stable negative pressure environment.

[0055] The process of establishing and maintaining a negative pressure environment plays a crucial role. First, the negative pressure environment uses atmospheric pressure to tightly press the cover 21 against the opening of the glue container 1, forming a reliable seal to prevent glue leakage and the entry of outside air. Second, under this negative pressure condition, dissolved gases in the glue are released, and tiny bubbles expand, rise, and burst under the pressure difference, thus being eliminated and preventing quality problems such as cigarette popping caused by bubbles from the source.

[0056] Step S2: After maintaining the negative pressure environment for a preset period of time, control the air pressure regulating pump 24 to stop pumping air, and at the same time control the solenoid valve 23 to open, so that the air pressure in the sealed space returns to normal pressure.

[0057] Maintaining a negative pressure environment for a preset period is essential for effective defoaming and stable sealing. Upon reaching the preset time, the control unit simultaneously executes two commands: first, it stops the air pressure regulating pump 24; second, it opens the solenoid valve 23. After the solenoid valve 23 opens, outside air quickly enters the sealed space, allowing the internal pressure to smoothly return to a state consistent with the external atmospheric pressure. This step marks the end of the "seal establishment and defoaming stage," and the system transitions to a stable atmospheric pressure state ready for adhesive supply.

[0058] Step S3: Control the adhesive delivery unit 3 to deliver adhesive to the adhesive supply gear pump of the cigarette machine.

[0059] After the system returns to normal pressure, the control unit immediately activates the glue supply mode. The first delivery pump 31 starts working, drawing glue from the bottom of the glue tank 1 through the suction pipe 32 and delivering it to the glue tank 34, which is installed at a higher position, via the delivery pipe 33. The glue tank 34 acts as a buffer and filter unit, and its internal filter 343 effectively removes impurities from the glue. Since the glue tank 34 is installed higher than the glue supply gear pump, the glue flows naturally towards the glue supply gear pump under gravity. This gravity-based glue supply method, performed under normal pressure, avoids the additional load or flow interference that negative pressure may cause to the pump, thus ensuring the extreme stability of the glue supply pressure and flow rate. It also eliminates the problem of glue surface skinning caused by compressed air contact in traditional pressure glue supply methods.

[0060] Step S4: Based on the detection data of the liquid level detector 25, when the liquid level value is lower than the preset threshold, control the adhesive delivery unit 3 to stop working and issue a replacement prompt.

[0061] The liquid level detector 25 continuously monitors the liquid level in the glue tank 1 throughout the glue supply process and transmits the real-time data to the control unit. When the detected liquid level is lower than a preset threshold, the control unit determines that the glue is about to run out. At this time, the control unit first controls the first delivery pump 31 to stop running, interrupting the glue supply; then it triggers the audible and visual alarm device and clearly displays a prompt to replace the glue tank 1 on the control panel. This automated early warning mechanism ensures the continuity of glue supply operations, avoids production interruptions or equipment idling that may be caused by glue running out, and allows operators sufficient preparation and response time.

[0062] Further, in step S4, based on the detection data of the liquid level detector 25, when the liquid level value is lower than a preset threshold, the adhesive delivery unit 3 is controlled to stop working and a replacement prompt is issued, including: Step S41: Continuously acquire the liquid level value detected by the liquid level detector 25.

[0063] The liquid level detector 25 collects liquid level data 10 times per second, and the control unit processes and stores this data in real time. A digital filtering algorithm is used to eliminate measurement errors caused by adhesive fluctuations or equipment vibrations, ensuring the accuracy and reliability of the liquid level data. Real-time liquid level information is simultaneously displayed on the human-machine interface of the control unit, allowing operators to easily monitor the remaining adhesive level.

[0064] Step S42: When the liquid level is lower than a preset threshold, control the first delivery pump 31 to stop working and issue a warning signal to replace the glue tank 1.

[0065] Furthermore, the adhesive supply method also includes the following steps: Step S5: In response to the glue discharge command, control the glue delivery unit 3 to discharge the medium in the pipeline.

[0066] When pipeline cleaning or equipment maintenance is required, the operator triggers a drain command via the drain button on the control panel. Upon receiving the command, the control unit simultaneously starts the first delivery pump 31 and the second delivery pump 41, and opens the electrically controlled drain valve 42. The two delivery pumps work together to create a high-flow-rate drain channel, allowing the adhesive or cleaning fluid in the pipeline to be quickly discharged from the electrically controlled drain valve 42. This dual-pump collaborative design shortens the traditional pipeline cleaning time, improves equipment maintenance efficiency, and reduces production preparation time.

[0067] In this embodiment, the adhesive supply method creatively optimizes the stages of seal establishment, bubble elimination, and stable delivery through a progressive control process from negative pressure sealing and defoaming to atmospheric pressure stable adhesive supply. It not only inherits the operational safety and maintenance convenience brought by the removable lid, but also achieves precise switching of working states by introducing the precise control of the solenoid valve 23, ensuring optimal stability and energy efficiency during the adhesive delivery stage. The entire method is logically rigorous and highly automated, solving the systemic pain points of traditional adhesive supply modes in terms of safety, quality, and efficiency, and providing a highly efficient and reliable adhesive supply solution for modern cigarette production. The above description is merely a preferred 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.

Claims

1. A glue supply device for a cigarette rolling machine, comprising a glue tank, characterized in that, Also includes: The removable lid unit includes a lid body that snaps onto the opening of the glue bucket, a sealing gasket disposed on the inner edge of the lid body, and a solenoid valve, a pressure regulating pump, and a liquid level detector disposed on the outer end face of the lid body. The solenoid valve and the pressure regulating pump are respectively connected to the sealed space formed by the lid body and the glue bucket through air passages formed in the lid body, for evacuating or replenishing air in the sealed space. The detection end of the liquid level detector extends into the sealed space for detecting the liquid level in the glue bucket. The adhesive delivery unit is used to deliver the adhesive in the enclosed space to the adhesive supply gear pump of the cigarette machine.

2. The cigarette machine glue supply device according to claim 1, characterized in that, The adhesive delivery unit includes a first delivery pump, a suction pipe, and a delivery pipe; the input end of the suction pipe passes through the cover and extends into the sealed space, and its output end is connected to the inlet of the first delivery pump; the outlet of the first delivery pump is connected to the input end of the delivery pipe, and the output end of the delivery pipe is used to deliver adhesive to the adhesive supply gear pump.

3. The cigarette machine glue supply device according to claim 2, characterized in that, The adhesive delivery unit also includes an adhesive tank and an adhesive supply pipe; the adhesive tank is installed higher than the adhesive supply gear pump; the side wall of the adhesive tank has an inlet that is connected to the output end of the adhesive supply pipe; the bottom of the adhesive tank has an outlet that is connected to the inlet of the adhesive supply gear pump through the adhesive supply pipe.

4. The cigarette machine glue supply device according to claim 3, characterized in that, The adhesive container is mounted on the cigarette rolling machine via a mounting bracket; the top of the adhesive container is equipped with an openable and closable end cap, and a filter is installed inside.

5. The cigarette machine glue supply device according to claim 3, characterized in that, It also includes a rapid glue discharge unit; the rapid glue discharge unit includes a second delivery pump and an electrically controlled drain valve; the inlet of the second delivery pump is connected to the glue supply pipe through a three-way connector, and the outlet of the second delivery pump is connected to the electrically controlled drain valve.

6. The cigarette machine glue supply device according to claim 5, characterized in that, It also includes a control unit electrically connected to the solenoid valve, the air pressure regulating pump, the liquid level detector, the first delivery pump, and the second delivery pump, respectively; the control unit is used to control the air pressure regulating pump to establish a negative pressure seal when the cover is fastened, to control the air pressure regulating pump to release the negative pressure seal and generate a replacement prompt when the liquid level detector detects a low level of adhesive, and to control the first delivery pump and the second delivery pump to work together to perform rapid adhesive discharge when a discharge command is received.

7. A method for supplying adhesive to a cigarette machine, applied to the adhesive supply device for a cigarette machine as described in claims 1 to 6, characterized in that, The method includes: Step S1: In response to the glue supply start signal, control the solenoid valve to close and control the air pressure regulating pump to evacuate the air in the sealed space enclosed by the cover and glue tank to establish and maintain a negative pressure environment of -0.05MPa to -0.1MPa. Step S2: After maintaining the negative pressure environment for a preset period of time, control the air pressure regulating pump to stop pumping air, and at the same time control the solenoid valve to open, so that the air pressure in the sealed space is restored to normal pressure. Step S3: Control the adhesive delivery unit to deliver adhesive to the adhesive supply gear pump of the cigarette machine; Step S4: Based on the detection data of the liquid level detector, when the liquid level value is lower than the preset threshold, control the adhesive delivery unit to stop working and issue a replacement prompt.

8. The method according to claim 7, characterized in that, Step S4, based on the detection data of the liquid level detector, when the liquid level value is lower than a preset threshold, control the adhesive delivery unit to stop working and issue a replacement prompt, including: Step S41: Continuously acquire the liquid level value detected by the liquid level detector; Step S42: When the liquid level is lower than a preset threshold, control the first delivery pump to stop working and issue a warning signal to replace the glue tank.

9. The method according to claim 7, characterized in that, Also includes: Step S5: In response to the glue discharge command, control the glue delivery unit to discharge the medium in the pipeline.

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