Tea vacuum packaging device with segmented air extraction function

Abstract

The utility model relates to tea processing equipment technical field provides a kind of tea vacuum packaging device with segmented air extraction function, including the packaging cavity for tea is placed, sealing assembly and vacuum packaging component, packaging cavity includes first air extraction area and second air extraction area, first air extraction area is communicated with first air passage, second air extraction area is communicated with second air passage, sealing assembly is sealed to the opening side of packaging cavity and forms sealing mouth, vacuum packaging component is equipped with double-end vacuum head, double-end vacuum head is wedged into first air passage and second air passage, and vacuum is extracted to first air passage and second air passage in turn in section;The utility model provides a kind of new tea vacuum packaging device, with the advantages of high practicality, good air extraction effect and high tea integrity.

Description

Technical Field

[0001] This utility model relates to the technical field of tea processing equipment, and in particular to a tea vacuum packaging device with segmented air extraction function. Background Technology

[0002] In the production and distribution of premium teas and mid-to-high-end loose teas, vacuum packaging has become the mainstream method for extending shelf life and maintaining aroma and shape integrity. Because tea leaves are thin, have a high gas content, and are loosely packed, if the negative pressure builds up too quickly during vacuuming or if the airflow directly acts on the bag opening area, problems such as tea leaves being sucked in by the high-speed airflow, increased breakage, blockage of the vacuuming channel, and high residual gas levels inside the bag can easily occur. This leads to damage to the finished product's appearance, unstable vacuum levels, and even sealing failure. Especially for high-end products sensitive to shape, such as white tea, bud tea, and flat-shaped premium green teas, the traditional "one-step" overall vacuuming method struggles to balance vacuuming efficiency with finished product quality.

[0003] For example, Chinese utility model patent CN201023688Y discloses a fully automatic multi-functional tea vacuum packaging machine, which integrates feeding, weighing, bag picking, vacuuming, and sealing into an automated small-package vacuum packaging device for tea. Through the coordinated operation of a robotic arm, vacuum chamber, and sealing device, it achieves continuous vacuuming and heat sealing of multiple packages, improving packaging efficiency. This solution focuses on feeding and bag picking, multi-package processing in the vacuum chamber, and overall machine automation. However, it still uses a single vacuum chamber for the overall vacuuming process, without specifically addressing the risk of tea scattering and clogging during the vacuuming process. This still results in significant disturbance to lightweight tea leaves.

[0004] For example, Chinese utility model patent CN212556956U describes a high-speed tea vacuum packaging machine. By setting through holes in a fixed block and cooperating with a vacuum pump and heating strip, the suction pipe and feeding box can be extended into the packaging cavity. After the tea is filled, the air inside the bag is directly extracted and heat-sealed, thus simplifying the process and increasing the packaging speed. This solution extends the suction pipe deep into the bag to improve suction efficiency, but the suction process is still a single-stage negative pressure establishment, lacking a phased flow restriction and buffering mechanism for the initial and later stages of suction. When dealing with loose and easily floating tea materials, there may still be situations where the local airflow is too rapid, the tea leaves adhere to the bag, or block the bag opening.

[0005] For example, Chinese utility model patent CN213620431U, a vacuum packaging machine for tea, proposes to improve the clamping stability and sealing quality of tea packaging cavities of different sizes during the vacuum packaging process by cooperating with an adjustable fixing mechanism and a heat sealing mechanism. Although such devices have made improvements in structural layout and clamping method, the air extraction path is still mainly based on a single cavity or a single path, without designing airflow guidance and segmented air extraction strategies based on the physical properties of tea, and lacking fine control over the airflow velocity distribution and negative pressure gradient during the air extraction process.

[0006] In addition, existing technologies in the field of vacuum packaging of tea still have the following common shortcomings: 1. The evacuation process is mostly a single-chamber, single-channel one-time whole evacuation, which makes it difficult to carry out segmented control of "pre-decompression - buffer - deep evacuation" according to the differences in the evacuation stage, which can easily lead to sudden negative pressure and excessive airflow disturbance. 2. Vacuum chambers typically lack specialized flow guiding, throttling, or zoned gas collection structures. The airflow directly acts on the opening of the packaging chamber or a localized area inside the bag, which can easily cause tea leaves to float, fly away, and clog the extraction port, affecting vacuum efficiency and the stability of the finished product. 3. To avoid broken and flying leaves, some equipment can only reduce the suction intensity or shorten the suction time, resulting in more residual gas in the bag and insufficient vacuum, making it difficult to balance high vacuum and tea quality protection. 4. Most existing devices are designed for general food or particulate materials, and lack targeted airflow engineering optimization for lightweight, easily floating, and shape-sensitive tea leaves. A structured solution based on "segmented airflow, gradual pressure change, and reconfiguration of the extraction path" has not yet been formed.

[0007] This utility model was developed to address the common problems in the field, such as sudden changes in air extraction leading to numerous tea fragments, frequent bag blockage, difficulty in maintaining stable vacuum levels, high residual gas rates, and the inability to achieve efficient air extraction while protecting the shape of the tea leaves. Utility Model Content

[0008] The purpose of this invention is to address the shortcomings of current methods by proposing a vacuum packaging device for tea with segmented air extraction function.

[0009] In order to overcome the shortcomings of the existing technology, the present invention adopts the following technical solution: A vacuum packaging device for tea with segmented vacuuming function includes a packaging cavity for placing tea, a sealing component, and a vacuum packaging component. The packaging cavity includes a first vacuuming area and a second vacuuming area. The first vacuuming area is connected to a first vacuuming channel, and the second vacuuming area is connected to a second vacuuming channel. The sealing component seals the opening side of the packaging cavity to form a sealing port. The vacuum packaging component is provided with a double-headed vacuum head. The double-headed vacuum head is wedged into the first vacuuming channel and the second vacuuming channel, and vacuums the first vacuuming channel and the second vacuuming channel in segments in sequence. The first suction area and the second suction area are located at the front and rear sections of the packaging cavity, respectively. The first suction area is connected to the first suction port through the first suction channel, and the second suction area is connected to the second suction port through the second suction channel.

[0010] Optionally, a limiting rib is provided in the middle of the packaging cavity, and the limiting rib is arranged along the length direction of the packaging cavity.

[0011] Optionally, the front and rear regions of the packaging cavity are connected by an airflow guiding structure, which is arranged along the inner wall of the packaging cavity.

[0012] Optionally, the sealing assembly includes a heat-sealing tape and a clamping device. The heat-sealing tape is used to heat-seal the bag opening after the air extraction process is completed, and the clamping device is used to clamp the opening of the packaging cavity during the air extraction process to ensure the airtightness of the bag opening.

[0013] Optionally, the packaging cavity is designed with flexible materials and deforms slightly during the evacuation process.

[0014] Optionally, the vacuum packaging component further includes an ejection assembly that ejects the sealing assembly from the packaging cavity.

[0015] Optionally, the vacuum packaging component includes a vacuum pump, which is connected to the first and second suction channels respectively.

[0016] Optionally, the vacuum pump is an adjustable-rate vacuum pump, which adjusts the pumping speed.

[0017] Optionally, the heating sealing strip is equipped with a heating element, which clamps and seals the opening of the packaging cavity.

[0018] Optionally, the heat-sealing strip is disposed at the edge of the opening side of the packaging cavity and is disposed along the length direction of the opening side of the packaging cavity.

[0019] The beneficial effects achieved by this utility model are: 1. By coordinating the front and rear segmented air extraction areas of the packaging cavity with the segmented air extraction control of the vacuum packaging components, the air extraction force is distributed to different areas and no longer concentrated on the bag opening area. This ensures that the entire device can prevent tea fragments from being instantly adsorbed to the bag opening, thereby reducing the risk of bag opening blockage and improving air extraction stability. 2. The quick extraction of the double-headed vacuum head by the pop-out component of the vacuum packaging component and the quick sealing of the air rod by the sealing component work together to create a tight time connection between the end of the vacuuming and the sealing action. This ensures that the entire device can complete the sealing before the vacuum state is broken, thus achieving the advantages of reliable sealing and long-lasting vacuum maintenance. 3. By combining the flow guide rib structure set in the packaging cavity with the double vacuum head of the vacuum packaging component, the air extraction process is changed from centralized air extraction to segmented directional air extraction. This ensures that the entire device can smoothly exhaust air during the air extraction stage and reduce the impact on the tea leaves, thereby achieving the advantages of intact tea leaves and reduced fragmentation. 4. Through the rapid withdrawal action of the vacuum packaging component's pop-out assembly and the rapid sealing action of the sealing component's air rod to adhere to the bag opening, the bag opening can be pressed and sealed in a very short time after the vacuuming is completed. This ensures that the entire device can prevent air backflow after the vacuuming is completed, resulting in the advantages of timely sealing and stable vacuum maintenance. 5. The suction nozzle clamping device on both sides of the packaging cavity works in conjunction with the action seat structure of the sealing component to ensure that the bag opening of the packaging cavity is always stably open during the filling stage, thus ensuring that the entire device can improve the tea filling efficiency and reduce the number of manual adjustments. 6. Through the coordinated operation of the segmented extraction zones within the packaging cavity, the sequential extraction structure of the dual-head vacuum heads in the vacuum packaging component, and the bag opening positioning structure provided by the sealing assembly before extraction, the extraction process is transformed from centralized extraction to segmented, slow-release extraction. This ensures stable exhaust during the extraction process, reduces the impact on the tea leaves, and thus achieves the advantages of maintaining the integrity of the tea leaves and minimizing fragmentation. Attached Figure Description

[0020] The present invention can be further understood from the following description taken in conjunction with the accompanying drawings. The components in the drawings are not necessarily drawn to scale, but rather the emphasis is on illustrating the principles of the embodiments. In different views, the same reference numerals designate the same parts.

[0021] Figure 1 This is a schematic diagram of the packaging cavity of this utility model.

[0022] Figure 2 This is a front view schematic diagram of the entire device of this utility model.

[0023] Figure 3 for Figure 2 Enlarged schematic diagram of part A in the middle.

[0024] Figure 4 This is a partial cross-sectional view of the entire device of this utility model.

[0025] Figure 5 for Figure 4 Enlarged schematic diagram of section B.

[0026] Figure 6 This is a side view of the entire device of this utility model.

[0027] Figure 7This is a cross-sectional view of the entire internal structure of the device according to this utility model.

[0028] Figure 8 for Figure 7 Enlarged schematic diagram of section C.

[0029] Figure 9 for Figure 7 Enlarged schematic diagram of section D in the middle.

[0030] Figure 10 for Figure 7 Enlarged schematic diagram of section E in the middle.

[0031] Explanation of reference numerals in the attached drawings: 1. Packaging cavity; 2. First suction channel; 3. Limiting rib; 4. Second suction channel; 5. Guide rib; 6. Tea feeding bucket; 7. Actuating air rod; 8. Housing; 9. Storage bucket; 10. Sliding groove; 11. Storage seat; 12. Moving plate; 13. Double-headed vacuum head; 14. Actuating cavity; 15. Pop-out air rod; 16. Support platform; 17. Suction pipe; 18. Limiting rod; 19. Support rod; 20. Suction pipe; 21. Vertical pole; 22. Vacuum pump; 23. Actuating seat; 24. Heating sealing strip; 25. Adsorption nozzle; 26. Opening and closing plate; 27. Air pipe; 28. Storage cavity; 29. ​​Opening and closing drive motor. Detailed Implementation

[0032] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the spirit of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustrative purposes only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.

[0033] according to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10As shown, this embodiment provides a tea vacuum packaging device with segmented vacuuming function, including a packaging cavity 1 for placing tea, a sealing assembly, and a vacuum packaging component. The packaging cavity 1 includes a first vacuuming area and a second vacuuming area. The first vacuuming area is connected to a first vacuuming channel 2, and the second vacuuming area is connected to a second vacuuming channel 4. The sealing assembly seals the opening side of the packaging cavity 1 to form a sealing opening. The vacuum packaging component is provided with a double-headed vacuum head 13. The double-headed vacuum head 13 is wedged into the first vacuuming channel 2 and the second vacuuming channel 4, and vacuums the first vacuuming channel 2 and the second vacuuming channel 4 in segments in sequence. The first suction area and the second suction area are located at the front and rear sections of the packaging cavity 1, respectively. The first suction area is connected to the first suction port through the first suction channel 2, and the second suction area is connected to the second suction port through the second suction channel 4.

[0034] By coordinating the front and rear segmented air extraction areas of the packaging cavity 1 with the segmented air extraction control of the vacuum packaging components, the air extraction force is distributed to different areas and no longer concentrated on the bag opening area. This ensures that the entire device can prevent tea fragments from being instantly absorbed to the bag opening, thereby reducing the risk of bag opening blockage and improving air extraction stability.

[0035] Optionally, a limiting rib 3 is provided in the middle of the packaging cavity, and the limiting rib 3 is arranged along the length direction of the packaging cavity 1.

[0036] like Figure 1 As shown, the first extraction zone (e.g.) Figure 1 (a dashed box in the middle) and the second extraction area (e.g.) Figure 1 There exists a deviation h between the dashed boxes (b) in the diagram, wherein the deviation can be adjusted according to the loading capacity to produce different packaging cavities 1; In this embodiment, the packaging cavity 1 is selected according to the capacity of the tea leaves being loaded. This is a common practice among those skilled in the art, and therefore will not be described in detail here.

[0037] Optionally, the vacuum packaging component includes a vacuum pump 22, which is connected to the first suction channel 2 and the second suction channel 4, respectively.

[0038] Optionally, the vacuum pump 22 is an adjustable-rate vacuum pump 22. The adjustable-rate vacuum pump 22 can adjust the pumping speed to adapt to the vacuum packaging requirements of different tea types and packaging cavity 1 sizes, ensuring stable airflow during the pumping process and no excessive interference to the tea.

[0039] The vacuum pump 22 is connected to the dual-head vacuum head 13 via a vacuum pipe 2720 17.

[0040] like Figure 2 As shown, the vacuum packaging component also includes a support rod 21 and a suction pipe 2720. One end of the support rod 21 is connected to the outer wall of the suction pipe 2720, and one end of the suction pipe 2720 is connected to the suction port of the vacuum pump 22. The other end of the suction pipe 2720 extends toward the vacuum pipe and is connected to the vacuum pipe, so that the suction pipe 2720 can be stably connected to the double-headed vacuum head 13 to form a stable vacuum suction channel.

[0041] The vacuum packaging component also includes a support rod 19, a support platform 16, a movable plate 12, and a limiting rod 18. One end of the support rod 19 is connected to the upper end face of the housing 8, and the other end of the support rod 19 is connected to the support platform 16. The support platform 16 is provided with a limiting hole. One end of the movable plate 12 is located above the support platform 16. One end of the limiting rod 18 is connected to the lower end face of the movable plate 12, and the other end of the limiting rod 18 extends vertically toward the side end face away from the movable plate 12 and passes through the limiting hole.

[0042] In addition, one end of the dual-head vacuum head 13 is disposed on the moving plate 12, and the other end of the dual-head vacuum head 13 extends toward the side away from the moving plate 12 and moves with the moving plate 12.

[0043] During the movement of the moving plate 12, the dual-headed vacuum head 13 is wedged into the first suction channel 2 and the second suction channel 4 of the packaging cavity.

[0044] In this embodiment, a storage base 11 is provided inside the housing 8, and the storage base 11 is located below the dual-head vacuum head 13. The storage base 11 has a storage cavity 28 for placing the packaging cavity 1.

[0045] Optionally, the vacuum packaging component further includes an ejection assembly that ejects the sealing assembly from the packaging cavity 1.

[0046] The pop-out assembly includes a pop-out air rod 15 and a booster pump (not shown in the figure). The booster pump is connected to the air inlet of the pop-out air rod 15 via an air pipe 27. The pop-out air rod 15 is disposed on the upper end surface of the support platform 16 and is positioned towards the side of the moving plate 12. The drive shaft of the pop-out air rod 15 is connected to the lower end surface of the moving end surface, so that the pop-out air rod 15 can lift and adjust the moving platform up and down in the direction of the drive shaft.

[0047] The tea vacuum packaging device also includes a power supply device and a controller, wherein the power supply device supplies power to the booster pump, the vacuum pump 22, and the controller.

[0048] The power supply device is used to convert the external mains power into the operating voltage of the vacuum pump 22, booster pump, sealing assembly, and controller, and to continuously provide stable power to the above-mentioned devices to ensure stable driving state during the evacuation and sealing process. Preferably, the power supply device converts the external mains power (such as AC220V) into a stable DC voltage (such as DC24V or DC36V) to meet the normal operating requirements of the booster pump, vacuum pump 22, and sealing assembly.

[0049] The controller is electrically connected to the booster pump, vacuum pump 22 and sealing assembly respectively. The controller's memory is pre-loaded with an execution program for segmented evacuation and sealing operations. The controller coordinates and controls the start-up and shutdown sequence and working status of the booster pump, vacuum pump 22 and sealing assembly according to the preset program, so that each device maintains coordinated and stable operation throughout the entire vacuum packaging cycle, ensuring the rhythm matching between segmented evacuation, sealing and bag removal operations.

[0050] Preferably, the power supply device includes a switching power supply module (e.g., MEANWELL LRS-150-24 switching power supply module), which converts the external mains power (AC220V) into a stable DC output voltage (DC24V) to provide working power for the booster pump, vacuum pump 22 and sealing assembly.

[0051] Preferably, the controller is a programmable logic controller (PLC) (e.g., Mitsubishi FX3U-32MR / ES-A type PLC), used to sequentially control the operation rhythm of the vacuum pump 22, the booster pump and the sealing assembly according to a preset program.

[0052] Optionally, the controller can also be replaced by a microcontroller control board (such as the STM32F103C8T6 microcontroller development board).

[0053] In this embodiment, the air inlet of the booster pump is connected to an external air source or a pre-set air tank inside the housing 8, and the air outlet of the booster pump is connected to the air inlet of the pop-up air rod 15 via an electromagnetic reversing valve, which is controlled by a controller.

[0054] Specifically, after the packaging cavity 1 contained in the packaging cavity 1 is evacuated in stages, the controller sends an action command to the electromagnetic reversing valve after detecting that the heating sealing strip 24 of the sealing assembly has completed the set sealing time and cooling holding time. This causes the booster pump to supply high-pressure gas to the pop-out air rod 15 in a short time, so that the drive shaft of the pop-out air rod 15 extends rapidly within a predetermined response time.

[0055] During the rapid extension of the drive shaft, the moving plate 12 is first moved upward, causing the dual-head vacuum head 13 to disengage from the first suction channel 2 and the second suction channel 4, cutting off the air connection between the suction channel and the packaging cavity 1. Subsequently, the moving plate 12 continues to move upward, causing the sealing assembly linked with it to rise in a direction away from the packaging cavity 1, so that a gap is formed between the sealed packaging cavity 1 and the inner wall of the packaging cavity 1, making it easier for the operator to directly remove the packaging cavity 1 and shorten the bag removal time.

[0056] Preferably, the controller determines the sealing completion time based on the temperature sensor of the sealing assembly or the vacuum change of the sealing station, and triggers the air supply action of the booster pump after a delay at that time, so that the extension action of the pop-out air rod 15 is timed with the heat sealing and cooling process of the sealing assembly, avoiding premature lifting before the seal has cooled and solidified, which would cause seal deformation.

[0057] Furthermore, the air inlet chamber of the pop-out air rod 15 is provided with a throttle orifice or a one-way throttle valve, so that the pop-out stroke adopts a rapid extension and slow retraction air path strategy: in the extension direction, the high-pressure gas output by the booster pump enters the pop-out air rod 15 through a low-resistance path, causing the drive shaft to quickly lift the moving plate 12 and the sealing assembly; in the retraction direction, the gas is slowly discharged through the throttle orifice, and the elastic force of the return spring makes the moving plate 12 and the sealing assembly fall back smoothly, avoiding the impact on the device due to free fall.

[0058] The dual-head vacuum head 13 is quickly extracted from the packaging cavity 1 by the pop-out component, which makes the response time of the booster pump driving the pop-out air rod 15 shorter. The lifting action of the sealing component can be completed in a very short time after sealing is completed, so that the segmented air extraction, heat sealing and pop-out bag removal form a tight rhythm coordination, thereby improving the working efficiency of the whole machine.

[0059] The drive shaft of the pop-out component is set in a direction parallel to the axis of the limiting rod 18.

[0060] In this embodiment, the pop-out component of the vacuum packaging component quickly pulls out the double-headed vacuum head 13 and the actuating air rod 7 of the sealing component quickly and tightly presses against the bag opening, so that there is a tight time connection between the end of the vacuuming and the sealing action. This ensures that the entire device can complete the sealing before the vacuum state is broken, thereby achieving the advantages of reliable sealing and long-lasting vacuum maintenance.

[0061] Optionally, the front and rear regions of the packaging cavity 1 are connected by an airflow guiding structure, which is arranged along the inner wall of the packaging cavity 1.

[0062] The airflow guiding structure is a guide rib 5 extending along the inner wall of the packaging cavity 1. The guide rib 5 extends along the length of the packaging cavity 1 and is used to guide the airflow inside the packaging cavity 1 to flow in the direction of the first and second air extraction areas during the air extraction process. This fixes the air extraction path and keeps the airflow direction consistent, avoiding local airflow swirling and turbulence that could impact the tea surface due to disordered air extraction direction, thereby reducing the generation of tea fragments.

[0063] The guide ribs 5 are made of flexible polyethylene (PE) or polypropylene (PP) material, preferably using the same film material as the main body of the packaging cavity 1, and are integrally formed during the hot-pressing process of packaging cavity 1 production. Through this integrally formed structure, the guide ribs 5 create a raised airflow channel inside the packaging cavity 1, forming a directional channel structure that runs through the entire packaging cavity 1. This provides a continuous air exhaust path during the evacuation phase, preventing the inner wall of the packaging cavity 1 from completely adhering to and squeezing the tea leaves during the later stages of evacuation, thus avoiding airflow blockage. This ensures a continuous and stable evacuation process, increases the speed of vacuum formation, and reduces residual gas rate.

[0064] The guide ribs 5 structure set in the packaging cavity 1 and the double-headed vacuum head 13 of the vacuum packaging component work together to change the gas extraction process from centralized gas extraction to segmented directional gas extraction. This ensures that the entire device can smoothly exhaust gas during the gas extraction stage and reduce the impact on the tea leaves, thereby achieving the advantages of intact tea leaves and reduced fragmentation.

[0065] Optionally, the packaging cavity 1 is designed with flexible materials and deforms slightly during the air extraction process to adapt to different shapes of packaging cavities 1 and tea types, ensuring that the gas can be evenly distributed during the air extraction process and avoiding excessive interference with the shape of the tea.

[0066] Multiple guide ribs 5 are arranged horizontally at intervals on the inner wall of the packaging cavity 1. A parallel flow channel structure for gas flow is formed between two adjacent guide ribs 5, so that the airflow during the suction process is directed to the first suction area and the second suction area along the flow channel. This makes the suction force dispersed inside the packaging cavity 1 rather than concentrated in a local area, avoiding the concentrated accumulation of tea leaves that are instantly absorbed to the bag opening area, and significantly reducing the risk of bag opening blockage.

[0067] The cross-section of the guide rib 5 is arc-shaped or trapezoidal. The arc-shaped or trapezoidal cross-section is used to improve the support strength of the rib to the inner wall of the packaging cavity 1 during the air extraction process. Through the support, the packaging cavity 1 is prevented from collapsing to the surface of the tea during the strong negative pressure stage, so that the tea is not flattened or excessively squeezed, reducing breakage caused by mechanical pressure, and improving the integrity of the tea shape and the quality of the finished product.

[0068] The directional airway structure formed by the guide ribs 5 on the inner wall of the packaging cavity 1 and the sequential air extraction path of the double-headed vacuum head 13 work together to ensure that the air extraction path is continuously unobstructed and the airflow distribution is more uniform. This ensures that the entire device can form a stable vacuum and effectively remove deep residual gas during the air extraction process, thereby achieving the advantages of stable vacuum and low residual gas rate.

[0069] By limiting the airflow direction and supporting the inner wall of the packaging cavity 1 through the guide ribs 5, the air extraction process is transformed from the traditional one-time concentrated rapid air extraction to a stable air extraction mode with guiding channels and pressure-relieving characteristics. This achieves high vacuum while protecting the integrity of the tea leaves, effectively improving the defects of existing technologies such as sudden air extraction leading to more tea fragments, frequent bag mouth blockage, difficulty in stabilizing vacuum, and high residual gas rate.

[0070] In this embodiment, the flexible support structure of the packaging cavity 1 works in conjunction with the vacuum packaging components, so that the air extraction speed and the internal structure buffer work together to avoid the tea leaves being flattened or scattered due to strong air extraction, thus ensuring that the entire device can maintain the integrity of the tea leaves while improving the air extraction efficiency.

[0071] Optionally, the sealing assembly includes a heat-sealing tape 24 and a clamping device. The heat-sealing tape 24 is used to heat-seal the bag opening after the air extraction process is completed, and the clamping device is used to clamp the opening of the packaging cavity 1 during the air extraction process to ensure the sealing of the bag opening.

[0072] The sealing components are symmetrically arranged on the side wall of the storage cavity 28, and the height of the sealing components needs to be set opposite to the outer edge of the opening direction of the packaging cavity 1. By using the heated sealing tape 24 and the clamping device, the sealing assembly seals the bag opening by heat pressing during the sealing process of the packaging cavity 1.

[0073] Among them, such as Figure 7 As shown, the side wall of the storage cavity 28 is provided with an action cavity 14; The sealing assembly also includes an actuating air rod 7 and an actuating seat 23. The output shaft of the actuating air rod 7 is connected to the actuating seat 23, and the air inlet of the actuating air rod 7 is connected to an external air source or a pre-set air storage tank inside the housing 8.

[0074] Meanwhile, one end of the actuating air rod 7 is disposed on the bottom wall of the actuating cavity 14 and extends toward the opening of the actuating cavity 14, and the output shaft of the actuating air rod 7 is connected to one side wall of the actuating seat 23.

[0075] After the dual-head vacuum head 13 completes the segmented evacuation of the first evacuation channel 2 and the second evacuation channel 4, the controller sends an action command to the booster pump, triggering the ejection component to drive the ejection air rod 15 to move. This causes the dual-head vacuum head 13 to quickly evacuate from the first evacuation channel 2 and the second evacuation channel 4 within a very short response time, thereby creating a complete isolation between the packaging cavity 1 and the outside world, preventing external air from flowing back into the packaging cavity 1 and disrupting the negative pressure environment the moment the evacuation is completed.

[0076] After the dual-head vacuum head 13 is completely withdrawn, the controller immediately sends a drive command to the actuating air rod 7, causing the actuating air rod 7 to push the actuating seat 23 and the sealing assembly to quickly approach the bag opening of the packaging cavity 1 within a very short response time, so that the heating sealing strip 24 of the sealing assembly quickly contacts and presses against the opening of the packaging cavity 1, realizing the instant heat sealing operation of the opening of the packaging cavity 1.

[0077] By rapidly pushing the actuating air spring 7, the sealing action is completed before the vacuum state inside the packaging cavity 1 is broken, preventing external air from flowing back into the packaging cavity 1 and reducing the vacuum level due to delayed sealing. This ensures that the negative pressure inside the packaging cavity 1 remains stable, resulting in a higher vacuum level and lower residual gas rate in the final vacuum packaging cavity 1, thus improving the effectiveness of vacuum packaging.

[0078] like Figure 7 As shown, the length of the actuating seat 23 is adapted to the width of the packaging cavity 1; meanwhile, the hot air bag and clamping device are disposed on the side wall of the actuating seat 23 facing the packaging cavity.

[0079] Optionally, the heat-sealing strip 24 is disposed at the edge of the opening side of the packaging cavity 1 and is disposed along the length direction of the opening side of the packaging cavity 1.

[0080] Optionally, the heat-sealing strip 24 is equipped with a heating element, which clamps and seals the opening of the packaging cavity 1. Figure 7 As shown, the length of the heating element is adapted to the length of the sealing opening of the packaging cavity 1, so that the heating element can seal the opening of the packaging cavity 1.

[0081] Preferably, the heating element is a ceramic heating element or a resistance wire heating element, which is embedded inside the heating sealing strip 24. It evenly transfers heat to the bag opening area of ​​the packaging cavity 1 through its heat-conducting surface. The heating element is electrically connected to the power supply device and is energized and heated under the driving force of the heating control signal output by the controller. This causes the surface of the heating sealing strip 24 to melt and press the heat-fused layer at the bag opening of the packaging cavity 1, thereby achieving a seal on the bag opening.

[0082] Furthermore, a temperature sensor (pattern type) is installed inside the heating sealing strip 24. The temperature sensor is used to detect and provide feedback on the heating temperature in real time, so that the controller can dynamically adjust the heating power and heating time to keep the sealing temperature within a suitable heat-melting range (e.g., 140℃~180℃). This avoids problems such as weak sealing due to insufficient heating, or damage to the aroma of tea or perforation of packaging materials due to overheating.

[0083] Preferably, the heated sealing strip 24 is fixedly connected to the actuating seat 23, and, driven by the actuating air rod 7, performs a pressing action on the bag opening of the packaging cavity 1, so that heating and pressure act synchronously to form a heat-pressed composite sealing structure, improving the sealing strength and airtightness. The actuating seat 23 is provided with a first placement cavity and a second placement cavity. The first placement cavity is for placing the clamping device, and the second placement cavity is for preventing the heated sealing strip 24 from entering.

[0084] like Figure 5 As shown, the heat-sealing tape 24 and the clamping device are arranged adjacent to each other. The clamping device is located near the edge of the packaging cavity 1, and the heat-sealing tape 24 is located slightly inside the edge of the opening of the packaging cavity 1.

[0085] When the dual-head vacuum head 13 is pulled out of the packaging cavity 1 and a stable negative pressure is formed inside the packaging cavity 1, the controller sends a synchronous drive command to the two actuating air rods 7, causing the two actuating air rods 7 to extend in the direction toward the middle of the storage cavity 28, driving the actuating seat 23 to move toward the middle of the storage cavity 28, thereby achieving bidirectional opposing compression at the bag opening position of the packaging cavity 1 (compressing toward the middle of the storage cavity 28, and achieving heat sealing operation during the compression process).

[0086] As the two actuators 23 move synchronously towards the center, the heating sealing strips 24 mounted on the actuators 23 simultaneously clamp and press towards the center from both sides of the bag opening in the packaging cavity 1. This ensures that the heating element on the heating sealing strips 24 fully adheres to the surface of the bag opening in the packaging cavity 1, completing the heat-sealing of the bag opening under the heating temperature set by the controller. The opposing clamping force formed by the synchronous extrusion from both sides ensures that the heat-sealing surface is subjected to uniform force and has a consistent contact area, thereby improving the sealing quality and sealing strength.

[0087] Because the actuating air spring 7 adopts a synchronous extrusion path and is closely connected with the timing of air extraction, the sealing action can be completed before the vacuum state in the packaging cavity 1 is broken, thereby preventing external air from flowing back into the bag, maintaining stable negative pressure inside the bag, significantly reducing residual gas rate, and achieving high-quality sealing with vacuum state.

[0088] The clamping device includes an adsorption pump and at least one adsorption nozzle 25. The at least one adsorption nozzle 25 is distributed along the length direction of the actuating seat 23. The adsorption pump is connected to the at least one adsorption nozzle 25 through adsorption pipes.

[0089] The adsorption nozzle 25 has adsorption force under the adsorption action of the adsorption pump.

[0090] The rapid withdrawal of the vacuum packaging component's ejector assembly and the quick sealing of the bag opening by the sealing assembly's air spring 7 work together to ensure that the bag opening can be sealed tightly in a very short time after the vacuuming is completed. This ensures that the entire device can prevent air backflow after the vacuuming is completed, resulting in timely sealing and stable vacuum maintenance.

[0091] In this embodiment, the actuating rods on both sides are initially spaced apart, with the width of the gap just wide enough for an empty packaging cavity 1 to be inserted and placed between the actuating seats 23 on both sides, and the outer wall of the packaging cavity 1 is arranged opposite to the suction nozzle 25. When the packaging cavity 1 is placed in the storage cavity 28, the controller drives the suction pump to work, providing a set negative pressure suction force through the suction nozzle 25, so that the suction nozzle 25 adsorbs onto the outer walls on both sides of the packaging cavity 1, thereby stretching and opening the bag opening of the packaging cavity 1, so that the packaging cavity 1 is in an open state.

[0092] At least one of the suction nozzles 25 is arranged in the height direction of the actuating seat 23 corresponding to the bag opening area of ​​the packaging cavity 1, so that the suction force acts on the area near the bag opening, so as to more effectively open the bag opening and prevent the bag from shaking or shrinking during the filling process.

[0093] Meanwhile, to avoid damage to the film material of the packaging cavity 1, a flexible rubber gasket or elastic sealing ring may be provided at the end of the adsorption nozzle 25 to reduce local stress concentration on the film of the packaging cavity 1 while achieving reliable adsorption.

[0094] Meanwhile, with the bag opening open and stably open, tea leaves are poured into the packaging cavity 1 through the tea leaf dispensing bucket 6 located above the storage cavity 28. The suction nozzle 25 continuously provides suction force throughout the dispensing process, keeping the packaging cavity 1 vertical and the bag opening open. This avoids problems such as tea leaves spilling, not falling into the bag, or uneven loading caused by the bag shaking, shrinking, or collapsing during the filling process, thereby improving the loading efficiency and consistency of the loading quality of the tea leaves.

[0095] Before the tea leaves are loaded and the vacuuming and sealing process begins, the controller can adjust the adsorption intensity of the adsorption pump as needed. This allows the adsorption nozzle 25 to continue providing appropriate positioning to the side wall of the packaging cavity 1 without affecting the subsequent vacuuming and heat sealing of the bag opening. Before the sealing process, the controller can stop the adsorption pump or reduce the negative pressure, ensuring that while the packaging cavity 1 remains generally positioned, the bag opening is smoothly sealed by the pressure of the actuating air rod 7 and the heated sealing strip 24.

[0096] The suction nozzles 25 on both sides of the packaging cavity 1, along with the actuating seat 23 of the sealing assembly, work together to ensure that the bag opening of the packaging cavity 1 remains stably open during the filling stage. This ensures that the entire device can improve tea filling efficiency and reduce the number of manual adjustments.

[0097] Through the adsorption and clamping of the above-mentioned clamping device, the packaging cavity 1 is always in an upright and open state during the filling stage, which significantly improves the convenience and efficiency of the tea feeding process; at the same time, it can still play a basic positioning and support role for the packaging cavity 1 before entering the air extraction and sealing stage, providing a stable bag posture for subsequent segmented air extraction and vacuum heat sealing, and improving the consistency and appearance quality of the finished product packaging.

[0098] In addition, such as Figure 7 As shown, the tea dispensing bucket 6 is mounted on the movable plate 12, and the dispensing port of the tea dispensing bucket 6 is positioned directly above the opening of the packaging cavity 1, ensuring that the tea leaves fall precisely into the packaging cavity 1. The uniform heating structure of the sealing assembly, combined with the symmetrical pressing force provided by the actuating air rod 7, ensures that the heat-melting area of ​​the bag opening is heated evenly and pressed consistently, guaranteeing the entire device has the advantages of a firm seal and consistent sealing.

[0099] In this embodiment, as Figure 7 As shown, the bottom wall of the storage cavity 28 is surrounded by an opening and closing assembly that can be closed and opened. After the tea leaves are vacuumed in sections and heat-sealed by the sealing assembly, the controller sends an opening command to the opening and closing assembly according to a preset program, causing the assembly to open and allowing the vacuum-sealed packaging cavity 1 to fall along the direction of gravity. To ensure the stability of the packaged packaging cavity 1 during the descent, a sliding groove 10 is provided below the bottom wall of the storage cavity 28. One end of the sliding groove 10 is arranged corresponding to the lower edge of the opening and closing assembly, and the other end is set towards the top of the storage barrel 9, forming an angle of 60° to 85° with the horizontal plane, so that the packaged tea products can smoothly enter the storage barrel 9.

[0100] The opening and closing assembly includes an opening and closing plate 26 and an opening and closing drive motor 29. One side of the opening and closing plate 26 is hinged to the bottom wall of the storage cavity 28 via a hinge shaft. The opening and closing drive motor 29 is disposed on the bottom wall of the storage cavity 28, and its output shaft is drivenly connected to the hinge shaft. Under the command of the controller, the opening and closing drive motor 29 drives the opening and closing plate 26 to rotate, switching it between a closed state and an open state.

[0101] When the packaging cavity 1 is placed into the storage cavity 28, the opening and closing plate 26 remains closed under the control of the opening and closing drive motor 29, thereby forming a support platform, so that the packaging cavity 1 maintains a stable posture during the air extraction and sealing process; after the sealing assembly completes heat sealing and has been cooled and held for a period of time, the controller triggers the opening and closing drive motor 29 according to the preset program, which quickly opens the opening and closing plate 26, and the sealed packaging cavity 1 slides down onto the sliding groove 10 under the action of gravity, and slides into the storage bucket 9 along the sliding groove 10.

[0102] Through the cooperation of the opening and closing components and the sealing components, the vacuum-sealed packaging cavity 1 can automatically detach from the processing station and enter the finished product storage area, avoiding sealing compression, vacuum damage, or bag deformation caused by manual bag handling. Furthermore, since the drop chute 10 has a set inclination angle, it can ensure that the packaging cavity 1 maintains a single falling direction and avoids tumbling, making the finished product collection process more stable and reliable, thus forming a continuous automated packaging process from vacuuming and sealing to finished product output.

[0103] By combining the segmented air extraction area set in the packaging cavity 1, the sequential air extraction structure of the double-headed vacuum head 13 of the vacuum packaging component, and the bag opening positioning structure provided by the sealing component before air extraction, the air extraction process is changed from centralized air extraction to segmented slow-release air extraction. This ensures that the entire device can stably exhaust air during the air extraction process and reduce the impact on the tea leaves, thereby achieving the advantages of intact tea leaves and reduced fragmentation.

[0104] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the protection scope of the present utility model. Therefore, all equivalent technical changes made based on the contents of the present utility model specification and drawings are included within the protection scope of the present utility model. Furthermore, the elements therein can be updated as technology develops.

Claims

1. A vacuum packaging device for tea with segmented air extraction function, characterized in that, The packaging includes a packaging cavity for placing tea leaves, a sealing assembly, and a vacuum packaging component. The packaging cavity includes a first suction area and a second suction area. The first suction area is connected to a first suction channel, and the second suction area is connected to a second suction channel. The sealing assembly seals the opening side of the packaging cavity to form a sealing opening. The vacuum packaging component is equipped with a double-headed vacuum head. The double-headed vacuum head is wedged into the first suction channel and the second suction channel, and evacuates the first suction channel and the second suction channel in sections in sequence. The first suction area and the second suction area are located at the front and rear sections of the packaging cavity, respectively. The first suction area is connected to the first suction port through the first suction channel, and the second suction area is connected to the second suction port through the second suction channel.

2. The tea vacuum packaging device with segmented air extraction function according to claim 1, characterized in that, A limiting rib is provided in the middle of the packaging cavity, and the limiting rib is arranged along the length direction of the packaging cavity.

3. The tea vacuum packaging device with segmented air extraction function according to claim 2, characterized in that, The front and rear sections of the packaging cavity are connected by an airflow guiding structure, which is arranged along the inner wall of the packaging cavity.

4. The tea vacuum packaging device with segmented air extraction function according to claim 3, characterized in that, The sealing assembly includes a heat-sealing tape and a clamping device. The heat-sealing tape is used to heat-seal the bag opening after the air extraction process is completed, and the clamping device is used to clamp the opening of the packaging cavity during the air extraction process to ensure the airtightness of the bag opening.

5. The tea vacuum packaging device with segmented air extraction function according to claim 4, characterized in that, The packaging cavity is designed with flexible materials and deforms slightly during the air extraction process.

6. The tea vacuum packaging device with segmented air extraction function according to claim 4 or 5, characterized in that, The vacuum packaging component further includes an ejector assembly that ejects the sealing assembly from the packaging cavity.

7. The tea vacuum packaging device with segmented air extraction function according to claim 6, characterized in that, The vacuum packaging component includes a vacuum pump, which is connected to the first and second suction channels respectively.

8. The tea vacuum packaging device with segmented air extraction function according to claim 7, characterized in that, The vacuum pump is an adjustable-rate vacuum pump, which adjusts the pumping speed.

9. The tea vacuum packaging device with segmented air extraction function according to claim 8, characterized in that, The heating sealing strip is equipped with a heating element, which clamps and seals the opening of the packaging cavity.

10. The tea vacuum packaging device with segmented air extraction function according to claim 9, characterized in that, The heat-sealing strip is disposed at the edge of the opening side of the packaging cavity and is disposed along the length direction of the opening side of the packaging cavity.

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