A rice vacuum packaging equipment

Abstract

This invention relates to the field of rice packaging technology, specifically a rice vacuum packaging equipment, including a vacuum sealing chamber, a material transfer carrier, a bag opening unit, and a vacuum sealing unit. The vacuum sealing unit is suspended on the top frame structure and includes a vacuum extraction device, an opening / closing interface assembly, and a bag edge clamping mechanism driven by a side-wing positioning mechanism. During operation, the material transfer carrier delivers the packaging bag to the working chamber, the bag opening unit opens the bag, the bag edge clamping mechanism clamps both ends of the bag opening, the interface assembly seals and then a vacuum is drawn, the heat-sealing assembly performs a heat-sealing operation on the opening of the packaging bag, and the corner heat-sealing clamps perform a secondary heat-sealing treatment on both ends of the sealed opening. This equipment achieves efficient continuous production through vacuum environment construction and double-layer heat-sealing technology, resulting in high sealing strength, low leakage rate, adaptability to various packaging specifications, convenient operation, and guaranteed quality of vacuum-packaged rice.

Description

Technical Field

[0001] This invention relates to the field of rice packaging technology, specifically a rice vacuum packaging device. Background Technology

[0002] Rice, a staple food in the daily diet of Chinese residents, is directly related to food safety and market value through its storage and preservation. During storage, rice is susceptible to factors such as oxygen, humidity, and microorganisms, making it prone to mold, insect infestation, and elevated fatty acid levels, leading to poor quality. To address these issues, vacuum packaging technology has been increasingly applied to rice packaging. By removing air from the packaging bag, a low-oxygen environment is created for the rice, significantly inhibiting microbial growth and oil oxidation. However, existing rice vacuum packaging equipment still faces several technical bottlenecks in practical applications:

[0003] Traditional rice vacuum packaging equipment mostly uses semi-automatic or manual operation modes, resulting in low production efficiency and difficulty in meeting the needs of large-scale production. In the vacuuming and sealing process, traditional equipment often suffers from problems such as crooked sealing and incomplete sealing due to inaccurate bag opening positioning. In addition, it mostly uses a single-layer heat-fusion sealing structure, which is prone to cracking at the sealing corners due to stress concentration, resulting in a high air leakage rate (usually above 3%-5%), affecting packaging quality. Summary of the Invention

[0004] The purpose of this invention is to provide a vacuum packaging device for rice to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A vacuum packaging device for rice includes a vacuum sealing chamber. The vacuum sealing chamber is equipped with a material transfer carrier, a bag opening unit, and a vacuum sealing unit. A feeding port is located on the side wall of the vacuum sealing chamber. The material transfer carrier extends through the feeding port and into the inner cavity of the vacuum sealing chamber. The inner cavity of the vacuum sealing chamber is divided into an input cavity and a working cavity by a partition structure. The end of the material transfer carrier is located within the working cavity. The bag opening unit is located in the middle area of ​​the working cavity and directly above the end of the material transfer carrier. A chamber top frame structure is located at the top of the feeding port. A working top frame structure is fixedly installed on the chamber top frame structure. The vacuum sealing unit is suspended on the working top frame structure and located directly above the working cavity. The vacuum sealing unit... The unit includes a vacuum pumping device and an interface assembly located below the vacuum pumping device. The interface assembly has an openable and closable structure, and heat-sealing components are provided on the outer sides of the clamping openings of both side frames. Side wing positioning mechanisms are also provided on both sides of the vacuum pumping device. Bag edge clamping mechanisms are installed at the driving ends of the side wing positioning mechanisms, and corner heat-sealing clamps are provided at the bottom of the bag edge clamping mechanisms. The corner heat-sealing clamps are located at both ends of the heat-sealing assembly. During operation, the side wing positioning mechanisms drive the bag edge clamping mechanisms to open and close, and the corner heat-sealing clamps clamp and fix the two ends of the rice packaging bag opening. The bag opening is vacuumed inside the interface assembly. After the vacuuming is completed, the heat-sealing assembly heat-seals the opening of the packaging bag, and then the corner heat-sealing clamps perform a second heat seal on the two ends of the heat-sealed opening.

[0007] As a further aspect of the present invention: the main body of the material transfer vehicle is a transfer platform, and lateral limiting rails are symmetrically arranged on the platform along the horizontal direction. The transfer platform is installed in the transition area between the input cavity and the working cavity of the vacuum sealing chamber through a folding lifting mechanism. The lifting end of the folding lifting mechanism and the bottom frame of the transfer platform form a folding lifting cooperation through a pivot connector.

[0008] As a further aspect of the present invention: the bag opening unit includes opening brackets arranged on both sides of the working chamber. Each opening bracket consists of a fixed base, a linear actuator, and an opening component. The fixed base is vertically installed on the inner wall of the working chamber by fasteners. The cylinder end of the linear actuator is vertically fixed to the fixed base, and the pushing end of the linear actuator extends vertically toward the platform surface of the transmission platform and is rigidly connected to the opening component. Bag surface adsorbers are provided on the facing surfaces of both opening components. A reference detection platform is also provided on the top extension of one opening component. A laser ranging channel is integrated on the reference detection platform. The detection end of the laser ranging channel establishes data interaction with the control end of the folding and lifting mechanism through an electrical signal line.

[0009] As a further aspect of the present invention: the vacuum pumping device is a trapezoidal cone structure with vacuum suction pipes symmetrically arranged on both sides, and the interface assembly is installed at the bottom conical opening of the vacuum pumping device; the interface assembly includes a first vacuum clamping frame and a second vacuum clamping frame arranged on both sides, the first vacuum clamping frame and the second vacuum clamping frame combined to form a frame structure with a triangular cross section, and the suction end of the vacuum suction pipe extends into the inner cavity area of ​​the frame structure.

[0010] As a further aspect of the present invention: an external fixing frame is provided on the bottom periphery of the vacuum pumping device, and pivot shafts are fixedly connected to both sides of the external fixing frame by fasteners; the first vacuum clamping frame and the second vacuum clamping frame are rigidly connected to the corresponding pivot shafts by fixing blocks; a fixing base plate is provided on the side wall of the vacuum pumping device, and an actuator is installed on the fixing base plate. The driving end of the actuator is connected to the pivot shaft by fasteners to control the pivot opening and closing action of the first vacuum clamping frame or the second vacuum clamping frame on the same side.

[0011] As a further aspect of the present invention: the hot melt packaging components are respectively disposed on the outer wall surfaces of the first vacuum clamping frame and the second vacuum clamping frame, and each hot melt packaging component includes a clamping substrate, a welding strip disposed along the inner edge of the clamping substrate, and a first heat source venting component installed on the outer wall surface of the clamping substrate; a heating element groove is provided on the plastic cover of the welding strip, and the heating element groove is connected to the output end of the first heat source venting component through a pipeline.

[0012] As a further aspect of the present invention: a suspension pivot is provided on the top of the clamping substrate, and fine-tuning slide rails are correspondingly provided on the outer wall surfaces of the first vacuum clamping frame and the second vacuum clamping frame; the suspension pivot is slidably assembled into the fine-tuning slide rails through sliding bases at both ends; a fixing bolt is also provided on the top of the outer wall of the first vacuum clamping frame and the second vacuum clamping frame, and a pressure strip pusher is vertically installed on the fixing bolt, and the driving end of the pressure strip pusher is connected to the suspension pivot through a push rod.

[0013] As a further aspect of the present invention: the side wing positioning mechanism includes a lateral fixing plate and a side wing frame vertically installed on the side wall of the lateral fixing plate; the main body of the bag edge clamping mechanism is a side wing working frame, which is located below the side wing frame, and its top is movably connected to the side wing frame through a swing mechanism frame; an inner suspension frame is provided inside the side wing frame, and the swing mechanism frame is assembled inside the inner suspension frame through a folding pivot structure; a side wing drive motor is fixedly installed at the outer end of the side wing frame, and a push rod is connected to the drive end of the side wing drive motor. The rod end of the push rod is connected to the swing mechanism frame through a linkage bolt to control the swing displacement of the side wing working frame.

[0014] As a further aspect of the present invention: a built-in base is provided within the side working frame, and the bottom end of the built-in base is movably connected to an opening and closing gripper via a pivoting latch, and an extension arm extends from the arm end of the opening and closing gripper; the corner hot melt clamp is fixedly installed at the bottom end of the extension arm by fasteners, and the clamping surface of the corner hot melt clamp corresponds to the end side edge of the hot melt packaging assembly.

[0015] As a further embodiment of the present invention: the corner hot-melt clamp includes a transverse support clamp and a corner hot-melt block fixed to the front end of the transverse support clamp by fasteners; the inner surface of the corner hot-melt block is embedded with a corner welding strip, and a second heat source vent is fixedly installed on the side wall of the transverse support clamp. The output end of the second heat source vent is connected to the heating cavity of the corner welding strip through a pipeline, and is used to provide the heat source required for heat sealing of the corner welding strip.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This invention achieves integrated operation of rice packaging bags from positioning, opening, vacuuming to sealing through multi-system collaborative control. The core architecture of the equipment consists of an intelligent transfer system, a high-precision bag opening mechanism, a high-efficiency vacuum generation module, and a composite heat sealing system. The bag opening mechanism combines negative pressure adsorption with a bidirectional linear actuator to ensure symmetrical opening of the bag opening. The vacuuming system innovatively adopts a trapezoidal cone and triangular frame design to form a gradually narrowing airflow channel, which, together with a mechanical force-enhancing locking mechanism, achieves short-term and efficient air discharge. The heat sealing system implements a graded sealing strategy. The main sealing unit provides constant contact pressure through a hot-pressure fine-tuning mechanism, while the corner sealing unit uses a spatial positioning mechanism to implement precise corner sealing, forming a seal guarantee without dead angles.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Furthermore, these drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments.

[0020] Figure 1 This is a schematic diagram of the overall structure of the rice vacuum packaging equipment provided in an embodiment of the present invention.

[0021] Figure 2 This is a schematic cross-sectional view of the compartment of a rice vacuum packaging device provided in an embodiment of the present invention.

[0022] Figure 3This is a schematic diagram of the structure of the vacuum sealing unit provided in an embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the bag opening unit provided in an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the structure of the vacuum pumping device and interface assembly provided in an embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the structure of the hot melt encapsulation assembly provided in an embodiment of the present invention.

[0026] Figure 7 This is a schematic diagram of the side wing positioning mechanism and the bag edge clamping mechanism provided in the embodiments of the present invention.

[0027] In the diagram: 1. Vacuum sealing chamber; 11. Feed port; 12. Input cavity; 13. Working cavity; 14. Chamber top frame structure; 15. Working top frame structure; 16. Suspension structure; 17. Working monitoring unit; 2. Material transfer carrier; 21. Folding lifting mechanism; 22. Transmission platform; 23. Lateral limit bar; 3. Bag opening unit; 31. Fixed base; 32. Linear actuator; 33. Opening component; 34. Bag surface adsorber; 35. Reference detection table; 36. Laser ranging channel; 37. Opening bracket; 4. Vacuum sealing unit; 5. Vacuum pumping device; 51. Vacuum suction pipeline; 6. Interface assembly; 61. First vacuum clamping frame; 62. Second vacuum clamping frame; 63. External fixing frame; 64. Mounting fastener; 65. Pivot shaft; 66. Fixed base block; 67. Fixed base plate; 68. Accelerator 69. Connecting fastener; 7. Hot melt sealing assembly; 71. Fine-tuning slide rail; 72. Sliding base; 73. Suspension pivot; 74. Clamping substrate; 75. Welding strip; 76. Heating element slot; 77. First heat source vent; 78. Fixing bolt; 79. Strip pusher; 70. Push rod; 8. Side wing positioning mechanism; 81. Lateral fixing plate; 82. Side wing frame; 83. Side wing drive motor; 8 4. Push rod; 85. Linkage pivot bolt; 86. Internal suspension frame; 87. Swing mechanism frame; 9. Bag edge clamping mechanism; 91. Side wing working frame; 92. Drive cylinder; 93. Built-in base; 94. Pivot lock; 95. Opening and closing gripper; 96. Outer arm; 10. Corner hot melt clamp; 101. Lateral support clamp; 102. Edge hot melt block; 103. Edge welding strip; 104. Second heat source ventilation component. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, examples of which are illustrated in the drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or identical elements.

[0029] Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0031] Example 1, please refer to Figures 1-3 A vacuum packaging device for rice is provided, including a vacuum sealing chamber 1 and a material transfer carrier 2, a bag opening unit 3, and a vacuum sealing unit 4 disposed inside the vacuum sealing chamber 1. The vacuum sealing chamber 1 has a feed port 11 along its side. The material transfer carrier 2 passes through the feed port 11 into its inner cavity. The interior of the vacuum sealing chamber 1 is divided into an input cavity 12 and a working cavity 13. The material transfer carrier 2 moves into the working cavity 13 as its working end position. The bag opening unit 3 is fixed above the central area of ​​the working cavity 13 and precisely aligned above the end of the material transfer carrier 2. A chamber top frame structure 14 is disposed on the top of the feed port 11, and the frame is firmly secured to the top of the bag opening unit 4. The vacuum sealing unit 4 is fixed to the top frame 15 of the working structure by hoisting and is placed directly above the bag opening unit 3. The vacuum sealing unit 4 consists of a vacuum pumping device 5, an interface component 6 and related components. The interface component 6 is designed with a flexible opening and closing structure, and heat-melting sealing components 7 are installed on the outer side of the clamping openings on both sides of its frame. In addition, the vacuum pumping device 5 also integrates side wing positioning mechanisms 8 on both sides. The pushing end of the mechanism is connected to the bag edge clamping mechanism 9. The bottom of the bag edge clamping mechanism 9 integrates corner heat-melting clamps 10. The corner heat-melting clamps 10 are arranged at both ends of the heat-melting sealing components 7 to achieve precise control of the corner edges of the bag opening.

[0032] The working process of the device is as follows: the side wing positioning mechanism 8 first drives the bag edge clamping mechanism 9 to perform the opening and closing action, and uses the corner hot melt clamp 10 to clamp the two ends of the rice packaging bag opening; then, the clamped bag opening is sent into the closing structure of the interface assembly 6, and the vacuum pumping device 5 performs a vacuuming operation to remove the air inside the bag; after the vacuuming is completed, the hot melt sealing assembly 7 immediately acts on the main body of the bag opening to perform hot melt sealing; finally, the corner hot melt clamp 10 is activated again to complete the heat sealing treatment of the two ends of the bag opening, ensuring that the entire seal is airtight.

[0033] The technical principle of this device is based on vacuum sealing and heat sealing fusion technology. The vacuum pumping device 5 creates a negative pressure environment to expel air from the bag, and the heat-melting packaging component 7 uses high temperature to melt the packaging material to achieve fusion sealing. At the same time, the side wing positioning mechanism 8 ensures the precise positioning of the bag edge clamping mechanism 9 and the corner heat-melting clamp 10, realizing a progressive sealing process from the bag opening to both ends, avoiding corner leakage problems, and improving the consistency and reliability of the seal.

[0034] The beneficial effects of this embodiment are reflected in improved packaging efficiency and product quality. Automated operation reduces human intervention errors, and the precise vacuuming and double heat sealing mechanism ensures the complete sealing of the packaging bag, effectively extending the shelf life of rice and reducing the risk of oxidation and deterioration. The compact structural layout optimizes the equipment footprint and workflow, reduces energy consumption and maintenance frequency, and is suitable for large-scale continuous production environments.

[0035] Example 2, please refer to Figure 2 and Figure 4 Based on the above embodiments, this embodiment optimizes the structure and expands the functions of the rice vacuum packaging equipment. The specific implementation structure is as follows:

[0036] The main body of the material transfer carrier 2 adopts a transmission platform 22 design, with a lateral limiting rail 23 on its platform to fix the lateral displacement of the packaging bags. The transmission platform 22 is connected to the vacuum sealing chamber 1 through a folding lifting mechanism 21 to achieve vertical height adjustment. A suspension structure 16 is added to the bottom of the top frame structure 14 of the chamber, which integrates an operation monitoring unit 17 to realize real-time visual monitoring and data acquisition of the operation process. The bag opening unit 3 consists of opening brackets 37 placed on both sides of the working chamber 13. Each opening bracket 37 includes a fixed base 31 fixed to the panel, a linear driver 32 installed on the base, and an opening component 33 connected to the drive end. Both opening components 33 are equipped with bag surface suction devices 34 to realize negative pressure bag opening function. In particular, a reference detection platform 35 is added to the left opening component 33, which integrates a laser ranging channel 36. The laser emission end of the detection channel is vertically aligned with the transmission platform 22, and its detection signal forms a closed-loop linkage control with the folding lifting mechanism 21 through the control line.

[0037] When the rice-filled packaging bags arrive at the working chamber 13 via the conveyor platform 22, the laser ranging channel 36 scans the bag opening height in real time and feeds the measurement data back to the control system; the folding lifting mechanism 21 dynamically raises or lowers the conveyor platform 22 to the preset height positioning point based on the feedback; then the linear drivers 32 on both sides synchronously push the opening component 33 to close, and the bag surface suction device 34 starts to suck open the bag opening; the operation monitoring unit 17 tracks the bag opening status throughout the process, and if the bag opening is not fully opened, it triggers a height compensation command; after the bag is opened, the vacuum sealing unit 4 immediately intervenes to perform vacuuming and heat sealing operations.

[0038] In this embodiment, the three-dimensional posture of the packaging bag is measured non-contactly through the laser ranging channel 36 to generate a precise height offset compensation signal. The folding and lifting mechanism 21 converts this signal into a lifting action, so that packaging bags of different heights can form the optimal docking position with the opening component 33. The linear actuator 32, combined with the physical action of negative pressure adsorption, realizes the synchronous opening of both sides of the bag opening. The operation monitoring unit 17 constitutes a dual guarantee system for operation quality, forming a closed-loop control flow of "measurement-adjustment-execution-verification".

[0039] The combination of the folding lifting mechanism 21 and the laser ranging channel 36 eliminates the impact of packaging bag height differences on the bag opening operation, improving equipment compatibility and positioning accuracy. Secondly, the introduction of the operation monitoring unit 17 establishes a quality control node in the production process. Through real-time analysis of the bag opening angle, the action parameters of the opening component 33 (such as adsorption pressure and drive stroke) can be automatically adjusted to reduce the defect rate. Finally, the bidirectional synchronous drive design of the opening bracket 37, combined with the constraint function of the lateral limit bar 23, ensures that the bag opening shape is stable and symmetrical, laying a reliable foundation for subsequent vacuum sealing.

[0040] Example 3, please refer to Figure 3 and Figure 5 Based on the above embodiments, this embodiment strengthens the structure and optimizes the function of key components in the vacuum sealing unit 4. The specific implementation structure is as follows:

[0041] The vacuum pumping device 5 adopts a trapezoidal cone structure to optimize airflow dynamics, with vacuum suction pipes 51 integrated on both sides as the main airflow channels. The interface assembly 6 is installed at the conical opening at the bottom of the device, specifically composed of a first vacuum clamping frame 61 and a second vacuum clamping frame 62. The two are arranged on the left and right sides respectively and are combined to form a closed frame structure with a triangular cross-section. The suction port of the vacuum suction pipe 51 extends to the central axis of the inner cavity of the triangular frame. An external fixing frame 63 is added to the bottom periphery of the vacuum pumping device 5 as a reinforcing support. The pivot shaft 65 is fixed on both sides of the frame by fasteners 64. The first vacuum clamping frame 61 and the second vacuum clamping frame 62 are respectively locked to the corresponding pivot shaft 65 by fixing base blocks 66 to form a rotating pair. A fixing base plate 67 is installed on the surface of the vacuum pumping device 5 housing. The actuator 68 mounted on it drives the pivot shaft 65 on the same side to rotate through the connecting fasteners 69, thereby precisely controlling the first vacuum clamping frame 61 or the second vacuum clamping frame 62 to perform opening and closing actions.

[0042] When the opening of the packaging bag is positioned in the working area, the actuators 68 on both sides synchronously drive the pivot shaft 65 to rotate, causing the first vacuum clamping frame 61 and the second vacuum clamping frame 62 to close towards the center to form a triangular sealing cavity; the vacuum suction pipeline 51 immediately starts and continuously extracts air from the triangular cavity, so that the packaging bag reaches the preset vacuum level; after the vacuum is completed, the hot melt sealing assembly 7 performs a linear seal along the bag opening, while the corner hot melt clamps 10 supplement the seal on the two corners of the bag opening; after the sealing is completed, the actuators 68 reverse the action to open the clamping frame, completing the release process of the packaging bag.

[0043] The triangular cross-section frame structure provides stronger rigid support than the traditional rectangular cross-section, effectively suppressing the deformation stress generated during vacuuming; the trapezoidal cone body, together with the triangular interface, forms a gradually narrowing airflow channel, enabling the vacuum suction pipe 51 to quickly expel air in a laminar flow manner; the actuator 68 converts the driving torque into the tangential closing force of the clamping frame through the pivot shaft 65, which is transmitted through the fixed base block 66 to form a highly linear planar pressing effect; the external fixed frame 63 constitutes a dual support system, which not only maintains the structural stability of the clamping mechanism, but also disperses the influence of high-frequency vibration on the vacuum pumping device 5 body.

[0044] Example 4, please refer to Figure 3 , Figure 5 and Figure 6 Based on the above embodiments, this embodiment further designs the structure and control mechanism of the hot melt packaging assembly 7. The specific implementation structure is as follows: The hot melt packaging assembly 7 is disposed on the outer wall of the first vacuum clamping frame 61 and the second vacuum clamping frame 62. Its core components include a fine-tuning slide rail 71 fixed to the outer wall of the clamping frame, a sliding base 72 that moves along the slide rail, and a clamping base 74 connected to the sliding base 72 by a suspension pivot 73. A welding strip 75 is embedded in the inner edge (facing the packaging bag side) of the clamping base 74. A heating element groove 76 is opened on the contact surface of the strip to arrange heating wires. A first heat source vent 77 is also integrated on the top of the clamping base 74 for heat dissipation balance. A fixing bolt 78 is added to the top of the clamping frame. A strip pusher 79 is installed on the bolt body. Its driving end is hinged to the suspension pivot 73 through a push rod 70 to form a pressure control link for the welding strip 75.

[0045] After the vacuum clamping frame closes, the fine-tuning slide rail 71 first guides the sliding base 72 to move laterally, so that the welding strips 75 on both sides are precisely aligned with the bag opening; the strip pusher 79 then drives the suspension pivot 73 to deflect downward through the push rod 70, causing the welding strip 75 to press tightly against the bag opening with a preset pressure; the heating wire in the heating element groove 76 quickly heats up to the melting temperature, and fuses the bag opening material in a vacuum environment; the first heat source ventilation component 77 simultaneously performs air cooling regulation to avoid overheating and damaging the material structure; after heat sealing is completed, the pusher contracts to release pressure, and the clamping frame opens to enter the next cycle.

[0046] This embodiment is based on a three-point dynamic compensation mechanism: the lateral displacement of the fine-tuning slide rail 71 compensates for the width deviation of the packaging bag; the lever structure of the suspension pivot 73 converts the vertical driving force of the push rod 70 into the planar normal pressure of the welding strip 75, achieving linear pressure adjustment of 0.1-1.0MPa; the strip pusher 79 forms a closed-loop feedback through the pressure sensor to ensure that packaging materials of different thicknesses obtain uniform pressing strength; and the first heat source vent 77 controls the temperature gradient through forced convection, so that the heat distribution difference of the heating element groove 76 is less than 5℃.

[0047] The beneficial effects of this embodiment are mainly reflected in the following aspects: First, the welding strip 75 adopts a composite mechanism of contact heat conduction and pressure compensation, which increases the sealing strength by 30% (compared to traditional equipment) and reduces the risk of heat damage by 60%; Second, the strip pusher 79, combined with the dynamic compensation function of the suspension pivot 73, expands the packaging bag thickness adaptability range to 0.05-0.5mm, meeting the needs of multi-specification production; Third, the spatial adjustment system formed by the fine-tuning slide rail 71 and the push rod 70 improves the sealing position accuracy to ±0.2mm, effectively preventing misaligned sealing; Fourth, the temperature control design of the first heat source vent 77 reduces energy consumption by 15% and extends the service life of the heating element by more than 3 times.

[0048] Example 5, please refer to Figure 3 and Figure 7 Based on the above embodiments, this embodiment further designs the side wing positioning mechanism 8 and its associated components. The specific implementation structure is as follows: The side wing positioning mechanism 8 uses the lateral fixing plate 81 as the installation reference, and a side wing frame 82 is mounted on it as the main support; the main body of the bag edge clamping mechanism 9 adopts the configuration of a side wing working frame 91, which is suspended below the side wing frame 82; the top of the side wing working frame 91 is fixedly connected to a swing mechanism frame 87, which is installed in the inner suspension frame 86 inside the side wing frame 82 through a folding hinge; a side wing drive motor 83 is configured at the outer end of the side wing frame 82, and its drive end is connected to a push rod 84. The end of the push rod 84 is connected to the swing mechanism frame 87 through a linkage bolt 85 to form a power transmission. An internal base 93 is provided inside the side wing working frame 91, and an openable and closable gripper 95 is installed at its bottom through a pivot lock 94; an extension arm 96 extends from the end of the gripper arm, and a corner hot melt clamp 10 is integrated into the end of the extension arm 96. The corner hot melt clamp 10 is mainly composed of a transverse support clamp 101, with a corner hot melt block 102 installed at its front end and a corner welding strip 103 embedded in the inner side of the block. A second heat source ventilation component 104 is configured on the side of the transverse support clamp 101, which is connected to the corner hot melt block 102 through a heat conduction pipe to form a temperature control circulation system.

[0049] After the main body of the packaging bag is sealed, the side wing drive motor 83 drives the push rod 84 forward, which forces the swing mechanism frame 87 to deflect downward through the linkage bolt 85, causing the entire side wing working frame 91 to move down synchronously; the opening and closing gripper 95 in the built-in base 93 unfolds under the pneumatic control of the drive cylinder 92, and the extension arm 96 is precisely positioned at the corner of the bag; then the opening and closing gripper 95 closes, so that the edge welding strip 103 of the corner heat fusion clamp 10 fits the corner of the bag; the second heat source vent 104 starts the heating program, and the edge heat fusion block 102 heats up to 200-230°C within 10 seconds to complete the corner sealing; during the process, the second heat source vent 104 adjusts the temperature gradient in real time to ensure uniform heat distribution; after the sealing is completed, the opening and closing gripper 95 opens, and the side wing drive motor 83 resets and enters the standby state.

[0050] The side-wing drive motor 83, through push rod 84 and linkage pivot 85, forms a crank-slider mechanism, which converts rotational motion into precise angular displacement of the swing mechanism frame 87; the pivot lock 94 of the built-in base 93 is designed to form a two-stage lever force amplification system, which enables the opening and closing gripper 95 to generate a constant clamping pressure of 0.8MPa; the edge welding strip 103 adopts a gradient thermal conductivity material, and its front high thermal conductivity zone and rear insulation zone form a directional heat flow channel. With the PID temperature control algorithm of the second heat source vent 104, the temperature fluctuation of the sealing zone is controlled within ±5℃.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A rice vacuum packaging device, comprising a vacuum sealing chamber (1) and a material transfer carrier (2), a bag opening unit (3), and a vacuum sealing unit (4) disposed within the vacuum sealing chamber (1); characterized in that: The vacuum sealing chamber (1) has a feeding port (11) on the side of the machine room. The material transfer carrier (2) enters from the feeding port (11) and extends into the inner cavity of the vacuum sealing chamber (1). The vacuum sealing chamber (1) is divided into an input cavity (12) and a working cavity (13). The end of the material transfer carrier (2) is located in the working cavity (13). The bag opening unit (3) is located in the middle area of ​​the working cavity (13) and directly above the end of the material transfer carrier (2); The top of the feed port (11) is provided with a chamber top frame structure (14), and a working top frame structure (15) is installed on the chamber top frame structure (14). The vacuum sealing unit (4) is hoisted on the working top frame structure (15) and located directly above the bag opening unit (3). The vacuum sealing unit (4) includes a vacuum pumping device (5) and an interface assembly (6) located below the vacuum pumping device (5). The interface assembly (6) has an openable structure, and hot melt sealing assemblies (7) are provided on the outside of the clamps of the two side frames of the interface assembly (6). The vacuum pumping device (5) is also provided with side wing positioning mechanisms (8) on both sides. The pushing end of the side wing positioning mechanisms (8) on both sides is equipped with a bag edge clamping mechanism (9). The bottom of the bag edge clamping mechanism (9) is provided with a corner hot melt clamp (10). The corner hot melt clamp (10) is located at both ends of the hot melt packaging assembly (7). The side wing positioning mechanism (8) drives the bag edge clamping mechanism (9) to perform opening and closing actions. The corner hot melt clamp (10) clamps and fixes the two ends of the rice packaging bag opening, keeping the bag opening inside the interface assembly (6) for vacuuming. After vacuuming, the hot melt sealing assembly (7) performs a heat sealing operation on the opening of the packaging bag, and then the corner hot melt clamp (10) performs a secondary heat sealing operation on both ends of the sealing opening.

2. The rice vacuum packaging equipment according to claim 1, characterized in that: The main body of the material transfer vehicle (2) is a transfer platform (22). Lateral limit bars (23) are symmetrically arranged on the platform (22) along the horizontal direction. The transfer platform (22) is installed in the transition area between the input cavity (12) and the working cavity (13) of the vacuum sealing chamber (1) through a folding lifting mechanism (21). The lifting end of the folding lifting mechanism (21) and the bottom frame of the transfer platform (22) form a folding lifting cooperation through a pivot connector.

3. The rice vacuum packaging equipment according to claim 1, characterized in that: The bag opening unit (3) includes opening brackets (37) arranged on both sides of the working chamber (13). The opening brackets (37) are composed of a fixed base (31), a linear actuator (32) and an opening component (33). The fixed base (31) is vertically installed on the inner wall of the working chamber (13) by fasteners. The cylinder end of the linear actuator (32) is vertically fixed to the fixed base (31). The pushing end of the linear actuator (32) extends vertically toward the table surface of the transmission platform (22) and forms a rigid connection with the opening component (33). Both sides of the opening components (33) are provided with bag surface suction devices (34). The top extension of one side of the opening component (33) is also provided with a reference detection platform (35). The reference detection platform (35) is integrated with a laser ranging channel (36). The laser ranging channel (36) detects the height of the packaging bag in real time and outputs a signal to the control end of the folding and lifting mechanism (21) to drive the transmission platform (22) to lift and position.

4. The rice vacuum packaging equipment according to claim 1, characterized in that: The vacuum pumping device (5) has a trapezoidal cone structure with vacuum suction pipes (51) symmetrically arranged on both sides. The interface assembly (6) is installed at the bottom cone position of the vacuum pumping device (5). The interface component (6) includes a first vacuum clamping frame (61) and a second vacuum clamping frame (62) arranged on both sides. The first vacuum clamping frame (61) and the second vacuum clamping frame (62) are combined to form a frame structure with a triangular cross section. The suction end of the vacuum suction pipe (51) extends into the inner cavity area of ​​the frame structure.

5. The rice vacuum packaging equipment according to claim 4, characterized in that: The vacuum pumping device (5) has an external fixing frame (63) on its bottom periphery. The two sides of the external fixing frame (63) are fixedly connected to pivot shafts (65) by fasteners (64). The first vacuum clamping frame (61) and the second vacuum clamping frame (62) are rigidly connected to the corresponding pivot shafts (65) by fixing blocks (66). The side wall of the vacuum pumping device (5) has a fixing base plate (67). An actuator (68) is installed on the fixing base plate (67). The driving end of the actuator (68) is connected to the pivot shaft (65) by fasteners (69) to control the pivot opening and closing action of the first vacuum clamping frame (61) and the second vacuum clamping frame (62) on the same side.

6. The rice vacuum packaging equipment according to claim 4 or 5, characterized in that: The hot melt encapsulation components (7) are respectively disposed on the outer wall surfaces of the first vacuum clamping frame (61) and the second vacuum clamping frame (62). Each hot melt encapsulation component (7) includes a clamping substrate (74), a welding strip (75) disposed along the inner edge of the clamping substrate (74), and a first heat source ventilation component (77) installed on the outer wall surface of the clamping substrate (74). The plastic cover of the welding strip (75) is provided with a heating element groove (76), a heating element is embedded in the heating element groove (76), and is connected to the output end of the first heat source ventilation component (77) through a pipeline.

7. The rice vacuum packaging equipment according to claim 6, characterized in that: The top of the clamping base plate (74) is provided with a suspension pivot (73), and the outer walls of the first vacuum clamping frame (61) and the second vacuum clamping frame (62) are respectively provided with fine-tuning slide rails (71). The suspension pivot (73) is slidably mounted in the fine-tuning slide rail (71) through the sliding bases (72) at both ends; The top of the outer wall of the first vacuum clamping frame (61) and the second vacuum clamping frame (62) is also provided with a fixing bolt (78), and a pressure strip pusher (79) is vertically installed on the fixing bolt (78). The driving end of the pressure strip pusher (79) is connected to the suspension pivot (73) through the push rod (70).

8. The rice vacuum packaging equipment according to claim 1, characterized in that: The side wing positioning mechanism (8) includes a side fixing plate (81) and a side wing frame (82) vertically installed on the side wall of the side fixing plate (81). The main body of the bag edge clamping mechanism (9) is a side wing working frame (91), which is located below the side wing frame (82). Its top is connected to the side wing frame (82) through a swing mechanism frame (87). An inner suspension frame (86) is provided inside the side wing frame (82), and the swing mechanism frame (87) is assembled inside the inner suspension frame (86) through a folding pivot structure; A side wing drive motor (83) is fixedly installed at the outer end of the side wing frame (82). The drive end of the side wing drive motor (83) is connected to a push rod (84). The rod end of the push rod (84) is connected to the swing mechanism frame (87) through a linkage bolt (85) to control the swing displacement of the side wing working frame (91).

9. The rice vacuum packaging equipment according to claim 8, characterized in that: The side working frame (91) is provided with an internal base (93). The bottom end of the internal base (93) is movably connected to an opening and closing gripper (95) via a pivot lock (94). An extension arm (96) is provided at the end of the arm of the opening and closing gripper (95). The corner hot melt clamp (10) is fixedly installed at the bottom end of the extension arm (96) by fasteners, and the clamping surface of the corner hot melt clamp (10) corresponds to the end side edge of the hot melt packaging assembly (7).

10. The rice vacuum packaging equipment according to claim 9, characterized in that: The corner hot melt clamp (10) includes a transverse support clamp (101) and a corner hot melt block (102) fixed to the front end of the transverse support clamp (101) by fasteners. The inner surface of the edge hot melt block (102) is embedded with an edge welding strip (103), and the side wall of the transverse support clamp (101) is fixedly installed with a second heat source vent (104). The output end of the second heat source vent (104) is connected to the heating cavity of the edge welding strip (103) through a pipeline, and is used to provide the heat source required for heat sealing of the edge welding strip (103).

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