Rice vacuum packaging equipment

Abstract

The invention relates to the technical field of rice packaging, in particular to rice vacuum packaging equipment which comprises a vacuum packaging bin, a material transferring carrier, a bag opening unit and a vacuum sealing unit. The vacuum sealing unit is hoisted to the operation top frame structure and comprises a vacuum air extractor, an opening and closing type connector assembly and a bag edge clamping mechanism driven by a side wing positioning mechanism. In the working process, the material transferring carrier conveys a packaging bag to the working cavity, the bag body opening unit opens a bag opening, the bag edge clamping mechanism clamps the two ends of the bag opening, vacuumizing is conducted after the connector assembly is sealed, the hot melting packaging assembly conducts heat sealing operation on the opening position of the packaging bag, and the corner hot melting clamp conducts secondary heat sealing treatment on the two ends of the opening of the packaging bag. By means of vacuum environment construction and a double-layer hot melting packaging technology, the equipment achieves efficient and continuous production, is high in sealing strength, low in air leakage rate, suitable for multi-specification packaging and convenient to operate, and guarantees the rice vacuum packaging quality.

Description

Technical Field

[0001] The invention relates to the technical field of rice packaging, in particular to rice vacuum packaging equipment. Background Art

[0002] As a core staple food in the daily diet of Chinese residents, the storage and preservation quality of rice is directly related to food safety and market circulation value. During storage, rice is easily affected by factors such as oxygen, humidity, and microorganisms, and is very prone to mold, insect infestation, and increased fatty acid value, resulting in poor quality. To solve the above problems, vacuum packaging technology has gradually been applied to the rice packaging field. By removing the air from the packaging bag, the rice is placed in a low-oxygen environment, which can significantly inhibit microbial reproduction and oil oxidation. However, existing rice vacuum packaging equipment still has many technical bottlenecks in practical application: Traditional rice vacuum packaging equipment mostly uses semi-automatic or manual operation modes, resulting in low production efficiency and difficulty meeting the needs of large-scale production. During the vacuuming and sealing process, traditional equipment often suffers from inaccurate bag opening positioning, leading to problems such as skewed seals and leaks. Furthermore, the single-layer hot-melt sealing structure often causes stress concentration and cracking at the sealing corners, resulting in high leakage rates (usually above 3%-5%), affecting packaging quality. Summary of the Invention

[0003] The object of the present invention is to provide a rice vacuum packaging device to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: A rice vacuum packaging device comprises a vacuum packaging chamber, wherein a material transfer carrier, a bag opening machine unit and a vacuum sealing machine unit are arranged in the vacuum packaging chamber; a feed port is arranged on the side wall of the vacuum packaging chamber, the material transfer carrier extends through the feed port and extends to the inner cavity of the vacuum packaging chamber, the inner cavity of the vacuum packaging chamber is divided into an input cavity and an operating cavity by a partition structure, and the end of the material transfer carrier is located in the operating cavity; the bag opening machine unit is arranged in the middle area of ​​the operating cavity and is located directly above the end of the material transfer carrier; a chamber top frame structure is arranged on the top of the feed port, an operating top frame structure is fixedly installed on the chamber top frame structure, the vacuum sealing machine unit is hoisted and arranged on the operating top frame structure and is located directly above the operating cavity; the vacuum sealing machine The unit includes a vacuum pumping device and an interface component arranged below the vacuum pumping device. The interface component is an openable and closable structure, and hot-melt packaging components are arranged on the outer sides of the clamps of the frames on both sides; side wing positioning mechanisms are also arranged on both sides of the vacuum pumping device, and the driving ends of the side wing positioning mechanisms on both sides are installed with bag edge clamping mechanisms, and the bottoms of the bag edge clamping mechanisms are provided with corner hot-melt clamps, and the corner hot-melt clamps are located at the two end side edges of the hot-melt packaging component; when working, the side wing positioning mechanism drives the bag edge clamping mechanism to open and close, and the two ends of the bag opening of the rice packaging bag are clamped and fixed by the corner hot-melt clamps, and the bag opening is vacuumed in the interface component; after the vacuuming treatment is completed, the hot-melt packaging component heat-seals the opening position of the packaging bag, and then the corner hot-melt clamps perform secondary heat-seals on the two ends of the heat-sealed opening.

[0005] As a further solution of the present invention: the main body of the material transfer vehicle is a transmission platform, and lateral limit bars are symmetrically arranged on the table top of the transmission platform. The transmission platform is installed in the transition area between the input cavity and the working cavity of the vacuum packaging chamber through a folding lifting mechanism, and the lifting end of the folding lifting mechanism and the bottom frame of the transmission platform form a folding lifting fit through a pivot connection.

[0006] As a further solution of the present invention: the bag opening unit includes an opening bracket arranged at the position of the compartment plate on both sides of the working cavity, and the opening bracket is composed of a fixed base, a linear drive and an opening component, wherein the fixed base is vertically installed on the inner wall of the compartment plate of the working cavity by fasteners, the cylinder end of the linear drive is vertically fixed to the fixed base, and the pushing end of the linear drive extends vertically toward the table surface of the transmission platform and forms a rigid connection with the opening component; bag surface absorbers are provided on the facing surfaces of the opening components on both sides, and a reference detection platform is also provided on the top extension section of the opening component on one side, and a laser ranging channel is integrated on the reference detection platform, and 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.

[0007] As a further solution of the present invention: the vacuum pumping device is a trapezoidal cone structure, with vacuum suction pipelines symmetrically arranged on both sides, and the interface assembly is installed at the bottom cone position of the vacuum pumping device; the interface assembly includes a first vacuum clamping frame and a second vacuum clamping frame respectively arranged on both sides, the first vacuum clamping frame and the second vacuum clamping frame are combined to form a frame structure with a triangular cross-section, and the suction end of the vacuum suction pipeline extends to the inner cavity area of ​​the frame structure.

[0008] As a further solution of the present invention: an external fixing frame is provided on the outer periphery of the bottom of the vacuum pumping device, and the two sides of the external fixing frame are fixedly connected with pivot shafts by installing fasteners; the first vacuum clamping frame and the second vacuum clamping frame are rigidly connected with the corresponding pivot shafts through fixed base blocks respectively; the side wall of the box body of the vacuum pumping device is provided with a fixed base plate, and an actuator is installed on the fixed base plate, and the driving end of the actuator is connected to the pivot shaft through a connecting fastener to control the pivoting opening and closing action of the first vacuum clamping frame or the second vacuum clamping frame on the same side.

[0009] As a further solution of the present invention: the hot melt packaging components are respectively arranged on the outer wall surfaces of the first vacuum clamping frame and the second vacuum clamping frame, each hot melt packaging component includes a clamping substrate, a welding strip arranged along the inner edge of the clamping substrate, and a first heat source ventilation piece installed on the outer wall surface of the clamping substrate; a heating element groove is opened on the plastic cover of the welding strip, and the heating element groove is connected to the output end of the first heat source ventilation piece through a pipeline.

[0010] As a further solution 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 in the fine-tuning slide rails through the 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 layering pusher is vertically installed on the fixing bolt, and the driving end of the layering pusher forms a transmission connection with the suspension pivot through a push rod.

[0011] As a further solution of the present invention: the side wing positioning mechanism includes a side fixing plate and a side wing frame vertically installed on the side wall of the side fixing plate; the main body of the bag edge clamping mechanism is the side wing operating frame, the side wing operating frame is arranged below the side wing frame, and its top is movably connected with the side wing frame through a swing mechanism frame; an inner suspension frame is arranged in the side wing frame, and the swing mechanism frame is assembled in the inner suspension frame through a folding pivot structure; a side wing drive motor is fixedly installed on the outer end of the side wing frame, and the driving end of the side wing drive motor is connected to a push rod, and the rod end of the push rod is connected to the swing mechanism frame through a linkage pivot bolt to form a transmission connection for controlling the swing displacement of the side wing operating frame.

[0012] As a further solution of the present invention: a built-in machine base is provided in the side wing operating frame, the bottom end of the built-in machine base is movably connected with an opening and closing clamp through a pivot lock, and the arm end of the opening and closing clamp is extended with an extension arm; the corner hot melt clamp is fixedly installed on the bottom end of the extension arm through a fastener, and the clamping surface of the corner hot melt clamp corresponds to the position formed by the end side edge of the hot melt packaging component.

[0013] As a further solution of the present invention: the edge hot melt clamp includes a transverse support strip and an edge hot melt block fixed to the front end of the transverse support strip by a fastener; the inner surface of the edge hot melt block is embedded with an edge welding strip, and the side wall of the transverse support strip is fixedly installed with a second heat source ventilation piece, and the output end of the second heat source ventilation piece is connected to the heating cavity of the edge welding strip through a pipeline, which is used to provide the heat source required for heat sealing for the edge welding strip.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention achieves integrated rice bag operations from positioning, bag opening, vacuuming, to sealing through multi-system collaborative control. The core architecture of the device 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 bag opening. The vacuuming system innovatively adopts a trapezoidal cone and triangular combined frame design to form a tapered airflow channel, which cooperates with a mechanical force-enhancing locking mechanism to achieve short-term and efficient air exhaust. The heat-sealing system implements a graded sealing strategy. The main sealing unit provides constant contact pressure through a heat pressure fine-tuning mechanism, while the corner sealing unit uses a spatial positioning mechanism to implement precise corner sealing, forming a sealing guarantee without dead angles.

[0015] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are incorporated into and constitute a part of the specification to illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application. These drawings and the accompanying description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.

[0017] Figure 1 This is a schematic diagram of the overall structure of the rice vacuum packaging equipment provided by an embodiment of the present invention.

[0018] Figure 2 A schematic cross-sectional view of a chamber of a rice vacuum packaging device provided in an embodiment of the present invention.

[0019] Figure 3A schematic structural diagram of a vacuum sealing unit provided in an embodiment of the present invention.

[0020] Figure 4 This is a structural schematic diagram of a bag opening machine unit provided in an embodiment of the present invention.

[0021] Figure 5 A schematic structural diagram of a vacuum pumping device and an interface assembly provided in an embodiment of the present invention.

[0022] Figure 6 A schematic structural diagram of a hot melt packaging assembly provided in an embodiment of the present invention.

[0023] Figure 7 This is a structural schematic diagram of the side wing positioning mechanism and bag edge clamping mechanism provided in an embodiment of the present invention.

[0024] In the figure: 1. Vacuum packaging 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 fence; 3. Bag opening unit; 31. Fixed base; 32. Linear drive; 33. Opening component; 34. Bag surface adsorber; 35. Reference detection table; 36. Laser ranging channel; 37. Opening bracket; 4. Vacuum sealing unit; 5. Vacuum exhaust 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. Promote actuator; 69, connecting fastener; 7, hot melt packaging assembly; 71, fine adjustment slide rail; 72, sliding base; 73, suspension pivot; 74, clamping base; 75, welding pressure strip; 76, heating element groove; 77, first heat source vent; 78, fixing bolt; 79, pressure strip pusher; 70, push rod; 8, wing positioning mechanism; 81, lateral fixing plate; 82, wing frame; 83, 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 operation frame; 92. Drive cylinder; 93. Built-in machine base; 94. Pivot lock; 95. Opening and closing clamp; 96. Extension arm; 10. Corner hot melt clamp; 101. Horizontal support clamp; 102. Edge hot melt block; 103. Edge welding strip; 104. Second heat source ventilation piece. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0026] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0028] For example 1, please refer to Figures 1 to 3 , provides a rice vacuum packaging equipment, including a vacuum packaging chamber 1 and a material transfer carrier 2, a bag opening unit 3 and a vacuum sealing unit 4 arranged inside the vacuum packaging chamber 1; the vacuum packaging chamber 1 is provided with a feed port 11 on the side edge of the machine room, and the material transfer carrier 2 passes through the feed port 11 into its inner cavity, and the interior of the vacuum packaging chamber 1 is divided into an input cavity 12 and an operating cavity 13, and the material transfer carrier 2 moves into the operating cavity 13 as the operating terminal position; the bag opening unit 3 is fixed above the middle area of ​​the operating cavity 13 and is precisely aligned with the terminal of the material transfer carrier 2; the top of the feed port 11 is provided with a chamber top frame structure 14, which is firmly fixed on the frame An operating top frame structure 15 is installed, and the vacuum sealing unit 4 is fixed on the operating top frame structure 15 by hoisting, and is placed directly above the bag opening unit 3; the specific composition of the vacuum sealing unit 4 includes a vacuum exhaust device 5, an interface component 6 and related components, wherein the interface component 6 is designed as a flexible opening and closing structure, and hot melt packaging components 7 are installed on the outer side of the clamping of the frame on both sides; in addition, side wing positioning mechanisms 8 are also integrated on both sides of the vacuum exhaust device 5, and the pushing end of the mechanism is connected to the bag edge clamping mechanism 9, and the bottom of the bag edge clamping mechanism 9 is integrated with a corner hot melt clamp 10, which is arranged at the two end side edges of the hot melt packaging component 7 to achieve precise control of the edge corners of the bag opening.

[0029] The working process of the equipment 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 bag opening of the rice packaging bag; then, the clamped bag opening is sent into the closed structure of the interface component 6, and the vacuum extraction device 5 performs a vacuum operation to remove the air in the bag; after the vacuuming is completed, the hot-melt packaging component 7 immediately acts on the main part of the bag opening to perform hot-melt sealing; finally, the corner hot-melt clamp 10 is started again to complete the heat sealing process on the two ends of the bag opening to ensure that there are no air leakage gaps in the entire seal.

[0030] The technical principle of this equipment is based on vacuum sealing and heat sealing fusion technology. The vacuum exhaust device 5 creates a negative pressure environment to expel the air in the bag, and the hot-melt packaging component 7 uses high temperature to melt the packaging material to achieve fusion sealing; at the same time, the side positioning mechanism 8 ensures the precise positioning of the bag edge clamping mechanism 9 and the corner hot-melt clamp 10, realizing a progressive sealing process from the bag mouth body to both ends, avoiding corner leakage problems, and improving the consistency and reliability of the seal.

[0031] The beneficial effects of this embodiment are reflected in the improvement of packaging efficiency and product quality. The automated operation reduces errors caused by manual intervention. The precise vacuuming and double heat-sealing mechanisms ensure 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.

[0032] For example 2, please refer to Figure 2 and Figure 4 Based on the contents of the above embodiment, this embodiment optimizes the structure and expands the functions of the rice vacuum packaging equipment. The specific implementation structure is as follows: The main body of the material transfer vehicle 2 is designed as a transmission platform 22, with lateral limit bars 23 on its top to prevent the lateral displacement of the packaging bags. The transmission platform 22 is connected to the vacuum packaging chamber 1 via a folding and lifting mechanism 21, enabling vertical height adjustment. A suspension structure 16 is installed at the bottom of the chamber's top frame 14, integrated with an operation monitoring unit 17, enabling real-time visual monitoring and data collection of the operation process. The bag opening unit 3 consists of opening brackets 37 positioned on either side of the operating chamber 13. Each opening bracket 37 includes a fixed base 31 fixed to the compartment board, a linear actuator 32 mounted on the base, and an opening member 33 connected to the drive end. Both opening members 33 are equipped with bag surface suction devices 34 to achieve negative pressure bag opening. A reference detection platform 35 is added to the left opening member 33, integrating a laser ranging channel 36. The laser emitting end of this detection channel is vertically aligned with the transmission platform 22, and its detection signal is controlled in a closed-loop linkage via a control circuit with the folding and lifting mechanism 21.

[0033] When the packaging bag full of rice is transported to the working chamber 13 via the transmission platform 22, the laser ranging channel 36 scans the bag opening height in real time and feeds back the measurement data to the control system; the folding and lifting mechanism 21 dynamically lifts or lowers the transmission platform 22 to a preset height positioning point based on the feedback; then the linear actuators 32 on both sides synchronously push the opening component 33 to close, and the bag surface absorber 34 starts to suck the bag opening open; the operation monitoring unit 17 tracks the bag opening status throughout the process, and triggers a height compensation instruction if the bag opening is not fully opened; after the bag opening is completed, the vacuum sealing unit 4 immediately intervenes to perform vacuuming and heat sealing operations.

[0034] This embodiment uses the laser ranging channel 36 to perform non-contact measurement of the three-dimensional posture of the packaging bag to generate an accurate height offset compensation signal; the folding and lifting mechanism 21 converts the signal into a lifting action, so that packaging bags of different heights can form an optimal docking position with the opening member 33; the linear drive 32 combines the physical effect of negative pressure adsorption to achieve synchronous opening of both sides of the bag opening, and the operation monitoring unit 17 constitutes a dual guarantee system for operation quality, forming a closed-loop control flow of "measurement-adjustment-execution-verification".

[0035] The cooperation between the folding and lifting mechanism 21 and the laser ranging channel 36 eliminates the influence of the height difference of the packaging bags on the bag opening operation, thereby improving the equipment compatibility and positioning accuracy; secondly, the introduction of the operation monitoring unit 17 constructs 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 driver stroke) can be automatically adjusted to reduce the defective 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 packaging.

[0036] For example three, please refer to Figure 3 and Figure 5 Based on the contents of the above embodiment, this embodiment strengthens the structure and optimizes the functions of the key components in the vacuum sealing unit 4. The specific implementation structure is as follows: The vacuum pumping device 5 utilizes a trapezoidal cone structure to optimize airflow dynamics, with vacuum suction pipes 51 integrated on both sides as the primary airflow channel. The interface assembly 6 is mounted at the bottom taper of the device and specifically comprises a first vacuum clamping frame 61 and a second vacuum clamping frame 62, which are arranged on either side and 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 reinforced support. The frame is secured to pivot shafts 65 on both sides by fasteners 64. The first vacuum clamping frame 61 and the second vacuum clamping frame 62 are each locked to their corresponding pivot shafts 65 via fixed base blocks 66, forming a revolving pair. A fixed base plate 67 is mounted on the surface of the vacuum pumping device 5 housing. An actuator 68 mounted thereon drives the rotation of the pivot shaft 65 on the same side via fasteners 69, thereby precisely controlling the opening and closing of the first vacuum clamping frame 61 or the second vacuum clamping frame 62.

[0037] 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, driving the first vacuum clamping frame 61 and the second vacuum clamping frame 62 to close toward the center to form a triangular sealed cavity; the vacuum suction pipeline 51 is immediately started and continuously extracts the air in the triangular cavity to make the packaging bag reach a preset vacuum degree; after the vacuum is completed, the hot melt packaging component 7 performs linear sealing along the bag opening, and at the same time the corner hot melt clamp 10 performs additional sealing on the two corners of the bag opening; after the sealing is completed, the actuator 68 reverses to open the clamping frame, completing the release process of the packaging bag.

[0038] The frame structure with a triangular cross-section provides stronger rigid support than the traditional rectangular cross-section, effectively suppressing the deformation stress generated during vacuuming; the trapezoidal cone cooperates with the triangular interface to form a tapered airflow channel, so that the vacuum suction pipeline 51 can quickly remove air in a laminar manner; the actuator 68 converts the driving torque into a 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 main body of the vacuum pumping device 5.

[0039] For example 4, please refer to Figure 3 、 Figure 5 and Figure 6 Based on the above-described 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 separately disposed on the outer walls of the first vacuum clamping frame 61 and the second vacuum clamping frame 62. Its core structure includes 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 via a suspension pivot 73. A welding strip 75 is embedded on the inner edge (facing the packaging bag side) of the clamping base 74, and a heating element groove 76 is provided on the contact surface of the strip for arranging the heating wire. 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, and a strip pusher 79 is installed on the bolt body. Its driving end is hinged to the suspension pivot 73 via a push rod 70, forming a pressure control link for the welding strip 75.

[0040] When the vacuum clamping frame is closed, the fine-tuning slide rail 71 first guides the sliding base 72 to move horizontally, so that the welding strips 75 on both sides are accurately aligned with the packaging bag opening; the strip pusher 79 then drives the suspension pivot 73 to deflect downward through the push rod 70, driving the welding strip 75 to cling to the bag opening with a preset pressure; the heating wire in the heating element slot 76 quickly heats up to the melting temperature, and the bag opening material is fused under a vacuum environment; the first heat source vent 77 simultaneously performs air cooling regulation to avoid overheating and damage to the material structure; after the heat sealing is completed, the pusher contracts to release the pressure, and the clamping frame opens to enter the next cycle.

[0041] This embodiment is based on a three-point dynamic compensation mechanism: the lateral displacement of the fine-tuning slide 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, realizing a 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; the first heat source vent 77 controls the temperature gradient through forced convection, so that the heat distribution difference of the heating element slot 76 is less than 5°C.

[0042] The beneficial effects of this embodiment are concentrated 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 with traditional equipment) and reduces the risk of thermal damage by 60%; second, the strip pusher 79 is combined with the dynamic compensation function of the suspension pivot 73 to expand the thickness adaptation range of the packaging bag to 0.05-0.5mm, meeting the production requirements of multiple specifications; third, the space adjustment system formed by the fine-tuning slide rail 71 and the push rod 70 improves the sealing position accuracy to ±0.2mm, effectively eliminating 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.

[0043] For example five, please refer to Figure 3 and Figure 7 Based on the contents of the above embodiment, this embodiment further designs the wing positioning mechanism 8 and associated components. The specific implementation structure is as follows: the wing positioning mechanism 8 uses a lateral fixing plate 81 as the installation base, on which a wing frame 82 is mounted as the main support. The main body of the bag edge clamping mechanism 9 adopts a wing operation frame 91 configuration, which is suspended below the wing frame 82. The top of the wing operation frame 91 is fixedly connected to a swing mechanism frame 87, which is installed in an internal suspension frame 86 inside the wing frame 82 via a folding hinge. The outer end of the wing frame 82 is equipped with a wing drive motor 83, whose driving end is connected to a push rod 84, and the end of the push rod 84 forms a power transmission with the swing mechanism frame 87 via a linkage pin 85. An internal machine base 93 is provided inside the wing operation frame 91, and an openable and closeable clamp 95 is mounted at its bottom via a pivot lock 94. The clamp arm end extends outward from an extension arm 96, and the edge hot melt clamp 10 is integrated into the end of the extension arm 96. The corner hot melt clamp 10 is specifically composed of a transverse support clamp 101 as the main body, with an edge hot melt block 102 installed at its front end, and an edge welding strip 103 embedded in the inside of the block; a second heat source ventilation piece 104 is configured on the side of the transverse support clamp 101, which is connected to the edge hot melt block 102 through a heat conduction pipe to form a temperature control circulation system.

[0044] When the main body of the packaging bag is sealed, the side wing drive motor 83 drives the push rod 84 forward, and forces the swing mechanism frame 87 to deflect downward through the linkage pivot bolt 85, driving the entire side wing operating frame 91 to move downward synchronously; the opening and closing jaws 95 in the built-in machine base 93 are unfolded under the pneumatic control of the drive cylinder 92, and the extended arm 96 is precisely positioned to the bag corner position; then the opening and closing jaws 95 are closed, so that the edge welding strip 103 of the edge hot melt clamp 10 fits the bag corner; the second heat source vent 104 starts the heating program, and the edge hot melt block 102 heats up to 200-230℃ 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 jaws 95 are opened, and the side wing drive motor 83 is reset and enters standby mode.

[0045] The wing drive motor 83 forms a crank slider mechanism through the push rod 84 and the linkage pivot bolt 85, which converts the rotational motion into the precise angular displacement of the swing mechanism frame 87; the pivot lock 94 of the built-in machine base 93 is designed to form a two-level lever force amplification system, so that the opening and closing jaws 95 can generate a constant clamping pressure of 0.8MPa; the edge welding strip 103 adopts gradient thermal conductive material, and its front end high thermal conductivity area and the rear end insulation area form a directional heat flow channel, which cooperates with the PID temperature control algorithm of the second heat source ventilation piece 104 to control the temperature fluctuation of the sealing area within ±5℃.

[0046] 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 embodied 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 illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

[0047] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A rice vacuum packaging device, comprising a vacuum packaging chamber (1), a material transfer carrier (2) arranged in the vacuum packaging chamber (1), a bag opening unit (3) and a vacuum sealing unit (4); characterized in that: A feed port (11) is provided on the machine room side edge of the vacuum packaging chamber (1), and the material transfer carrier (2) penetrates from the feed port (11) and extends into the inner cavity of the vacuum packaging chamber (1). The interior of the vacuum packaging chamber (1) is divided into an input cavity (12) and an operating cavity (13), and the terminal end of the material transfer carrier (2) is located in the operating cavity (13); The bag opening unit (3) is arranged in the middle area of ​​the working cavity (13) and is located directly above the terminal of the material transfer vehicle (2); A chamber top frame structure (14) is provided on the top of the feed port (11), an operating top frame structure (15) is installed on the chamber top frame structure (14), and the vacuum sealing unit (4) is hoisted on the operating top frame structure (15) and is located directly above the bag opening unit (3); The vacuum sealing unit (4) comprises a vacuum pumping device (5) and an interface component (6) arranged below the vacuum pumping device (5); the interface component (6) is an open-close structure, and hot-melt sealing components (7) are arranged on the outside of the clamping openings of the two side frames of the interface component (6); The vacuum pumping device (5) is further provided with side wing positioning mechanisms (8) on both sides, and the pushing ends of the side wing positioning mechanisms (8) on both sides are installed with bag edge clamping mechanisms (9), and the bottom of the bag edge clamping mechanisms (9) is provided with edge hot melt clamps (10), and the edge hot melt clamps (10) are located at the two end side edges of the hot melt packaging component (7); The flank positioning mechanism (8) drives the bag edge clamping mechanism (9) to perform the opening and closing action, and the two ends of the bag opening of the rice packaging bag are clamped and fixed by the corner hot-melt clamp (10), so that the bag opening is kept in the interface component (6) for vacuuming. After the vacuuming is completed, the hot-melt sealing component (7) performs a heat-sealing operation on the opening position of the packaging bag, and then the corner hot-melt clamp (10) performs a secondary heat-sealing operation on the two ends of the sealed 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 transmission platform (22), and lateral limit bars (23) are symmetrically arranged on the table surface of the transmission platform (22) along the horizontal direction. The transmission platform (22) is installed in the transition area between the input cavity (12) and the working cavity (13) of the vacuum packaging chamber (1) through a folding lifting mechanism (21), and the lifting end of the folding lifting mechanism (21) and the bottom frame of the transmission platform (22) form a folding lifting fit through a pivot connection.

3. The rice vacuum packaging equipment according to claim 1, characterized in that: The bag opening unit (3) includes an opening bracket (37) arranged at the compartment plate positions on both sides of the working chamber (13), and the opening bracket (37) is composed of a fixed base (31), a linear driver (32) and an opening member (33), wherein the fixed base (31) is vertically mounted on the inner wall of the compartment plate of the working chamber (13) through a fastener, the cylinder end of the linear driver (32) is vertically fixed to the fixed base (31), and the pushing end of the linear driver (32) extends vertically toward the table surface of the transmission platform (22) and forms a rigid connection with the opening member (33); Bag surface absorbers (34) are provided on the facing surfaces of the opening members (33) on both sides, and a reference detection platform (35) is also provided on the top extension section of the opening member (33) on one side. A laser ranging channel (36) is integrated on the reference detection platform (35). 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 move up and down.

4. The rice vacuum packaging equipment according to claim 1, characterized in that: The vacuum pumping device (5) is a trapezoidal cone structure, with vacuum suction pipelines (51) symmetrically arranged on both sides thereof, and the interface component (6) is installed at the bottom cone position of the vacuum pumping device (5); The interface assembly (6) comprises 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 pipeline (51) extends to the inner cavity area of ​​the frame structure.

5. The rice vacuum packaging equipment according to claim 4, characterized in that: The bottom periphery of the vacuum pumping device (5) is provided with an external fixing frame (63), and the two sides of the external fixing frame (63) are fixedly connected with the pivot shaft (65) by installing fasteners (64); the first vacuum clamping frame (61) and the second vacuum clamping frame (62) are respectively rigidly connected to the corresponding pivot shaft (65) through the fixed base block (66); the side wall of the box body of the vacuum pumping device (5) is provided with a fixed base plate (67), and the fixed base plate (67) is installed with an actuator (68), and the driving end of the actuator (68) is connected to the pivot shaft (65) through the connecting fastener (69) to form a transmission connection for controlling the pivoting 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 packaging components (7) are respectively arranged on the outer wall surfaces of the first vacuum clamping frame (61) and the second vacuum clamping frame (62), and each hot melt packaging component (7) includes a clamping substrate (74), a welding strip (75) arranged along the inner edge of the clamping substrate (74), and a first heat source vent (77) installed on the outer wall surface of the clamping substrate (74); A heating element groove (76) is provided on the plastic cover of the welding strip (75), a heating element is embedded in the heating element groove (76), and the heating element is connected to the output end of the first heat source vent (77) through a pipeline.

7. The rice vacuum packaging equipment according to claim 6, characterized in that: A suspension pivot (73) is provided on the top of the clamping substrate (74), and fine-tuning slide rails (71) are correspondingly provided on the outer wall surfaces of the first vacuum clamping frame (61) and the second vacuum clamping frame (62); The suspension pivot (73) is slidably assembled in the fine-tuning slide rail (71) through the sliding bases (72) at both ends; A fixing bolt (78) is further provided on the top of the outer wall of the first vacuum clamping frame (61) and the second vacuum clamping frame (62), and a layer pusher (79) is vertically mounted on the fixing bolt (78). The driving end of the layer pusher (79) is connected to the suspension pivot (73) through a driving rod (70).

8. The rice vacuum packaging equipment according to claim 1, characterized in that: The flank positioning mechanism (8) comprises a lateral fixing plate (81) and a flank frame (82) vertically mounted on the side wall of the lateral fixing plate (81); The main body of the bag edge clamping mechanism (9) is a wing operating frame (91), which is arranged below the wing frame (82), and its top is movably connected to the wing frame (82) through a swing mechanism frame (87); An inner suspension frame (86) is provided in the side wing frame (82), and a swing mechanism frame (87) is assembled in the inner suspension frame (86) via a folding pivot structure; A wing drive motor (83) is fixedly mounted on the outer end of the wing frame (82), and a push rod (84) is connected to the driving end of the wing drive motor (83). The rod end of the push rod (84) is connected to the swing mechanism frame (87) through a linkage pin (85) to form a transmission connection for controlling the swing displacement of the wing operation frame (91).

9. The rice vacuum packaging equipment according to claim 8, characterized in that: A built-in machine base (93) is provided in the wing operation frame (91), and the bottom end of the built-in machine base (93) is movably connected to an opening and closing clamping claw (95) through a pivot lock (94), and an extension arm (96) is extended from the arm end of the opening and closing clamping claw (95); The corner hot melt clamp (10) is fixedly mounted on the bottom end of the extension arm (96) via a fastener, and the clamping surface of the corner hot melt clamp (10) corresponds to the position formed by the end side edge of the hot melt packaging component (7).

10. The rice vacuum packaging equipment according to claim 9, characterized in that: The corner hot-melt clamp (10) comprises a transverse support clamp (101) and a corner hot-melt block (102) fixed to the front end of the transverse support clamp (101) via a fastener; An edge welding strip (103) is embedded in the inner surface of the edge hot melt block (102), and a second heat source vent (104) is fixedly installed on the side wall of the transverse support clamp (101). 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, so as to provide the edge welding strip (103) with the heat source required for heat sealing.

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