Multifunctional pneumatic nut quantitative vacuum sealing packaging machine with graded structure

Abstract

This invention relates to the field of packaging equipment, specifically to a multi-functional pneumatic quantitative vacuum sealing packaging machine for nuts with a grading structure. A cylindrical upper tank is movably installed inside the upper end of the lower tank. Multiple screening holes are evenly distributed on the bottom wall of the upper tank, and a vibration motor is installed on the upper tank. The bottom wall of the upper tank is inverted conical, and a discharge pipe extending downward and passing through the outer side of the lower tank is provided at the bottom center of the upper tank. A spiral guide plate is fixedly installed on the inner side of the bottom wall of the upper tank, and the discharge pipe is located at the center of the guide plate. The vibration motor drives the upper tank to vibrate, causing the nuts to roll along the inverted conical bottom wall of the upper tank towards the discharge pipe. Dust, impurities, nut fragments, and smaller nuts fall downward into the lower tank through the screening holes on the bottom wall of the upper tank, while larger nuts are discharged through the discharge pipe, thus pre-screening the nuts before packaging.

Description

Technical Field

[0001] This invention relates to the field of packaging equipment, specifically to a multi-functional pneumatic nut quantitative vacuum sealing packaging machine with a graded structure. Background Technology

[0002] When selling nuts, they need to be packaged in bags, usually plastic bags.

[0003] In the prior art, utility model patent application number CN202210778648.6 discloses a bag-opening and loading device for packaging walnuts, including a workbench and a conveyor belt set on the workbench. A loading seat is driven and installed on the conveyor belt, and a bag-binding assembly is provided on the loading seat. A hanging seat is installed on the workbench, and a storage box is installed on the upper part of the hanging seat. A feeding assembly is fitted at the lower part of the storage box. A through groove is provided in the middle of the storage box, and a support rail is provided at the lower end of the storage box. The feeding assembly includes an upper blocking plate slidably installed on the through groove and a lower blocking plate slidably installed on the support rail. During bagging, the upper blocking plate slides to the left, and the lower blocking plate slides to the right. The upper blocking plate first closes the middle of the storage box, and then the lower blocking plate opens the lower end of the storage box, allowing a fixed amount of walnuts in the storage box to fall into the packaging bag, thus completing the bagging.

[0004] However, nuts are often mixed with some dust, impurities and nut pieces before packaging. The above-mentioned bag opening and loading equipment does not screen the nuts before packaging, which causes dust, impurities and nut pieces to be mixed into the packaging, affecting the quality of the nuts. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-functional pneumatic nut quantitative vacuum sealing packaging machine with a grading structure, which can screen out dust, impurities, nut fragments and small nut particles before packaging, thereby solving the defects mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A multi-functional pneumatic nut quantitative vacuum sealing and packaging machine with a grading structure includes a lower tank, a support frame fixedly installed at the bottom of the lower tank, and a cylindrical upper tank movably installed at the upper end of the lower tank. Multiple screening holes are evenly distributed on the bottom wall of the upper tank, and a vibration motor is installed on the upper tank. The bottom wall of the upper tank is inverted conical, and a discharge pipe extending downwards and exiting the outer side of the lower tank is located at the center of the bottom of the upper tank. A spiral-shaped guide plate is fixedly installed on the inner side of the bottom wall of the upper tank, and the discharge pipe is located at the center of the guide plate. A quantitative discharge mechanism is connected to the lower end of the discharge pipe, a bag-supporting mechanism is located below the quantitative discharge mechanism, a conveyor is located below the bag-supporting mechanism, and a sealing mechanism is located on the conveyor downstream of the bag-supporting mechanism.

[0008] As a further improvement, a lower support plate is fixedly installed on the outer wall of the lower tank, and an upper support plate located above the lower support plate is fixedly installed on the outer wall of the upper tank. A spring connects the lower support plate and the upper support plate.

[0009] As a further improvement, the quantitative dispensing mechanism includes a horizontal plate fixedly installed on the upright frame, on which a vertically extending quantitative tube is fixedly installed. The upper end of the quantitative tube is connected to the lower end of the dispensing tube via a flexible hose. A first insert plate for blocking the material inside the quantitative tube from falling is movably installed on the quantitative tube. A second insert plate for blocking the material inside the quantitative tube from falling is movably installed on the quantitative tube below the first insert plate. The first insert plate and the second insert plate are respectively driven by pneumatic components to insert into or withdraw from the quantitative tube.

[0010] As a further improvement, the bag-supporting mechanism includes a mounting frame located below the horizontal plate and driven to rise and fall by a first power device. A horizontally extending mounting shaft, driven to rotate by an adjusting motor, is mounted on the mounting frame. A swing arm is fixedly mounted on the mounting shaft, with the plane of the swing arm perpendicular to the mounting shaft. A first mounting plate is fixedly mounted on the end of the swing arm away from the mounting shaft. A first suction cup is fixedly mounted on the side of the first mounting plate opposite to the swing arm. A placement plate for placing packaging bags is provided on one side of the upright frame. When the mounting shaft drives the first suction cup to rotate to the bottom of the first mounting plate, the placement plate is located below the first suction cup. A fixing plate is fixedly mounted on the upright frame. The mounting frame and the fixing plate are located on opposite sides of the metering tube. A second mounting plate, driven by a second power device and moving radially along the metering tube, is provided on the side of the fixing plate closest to the metering tube. A second suction cup is fixedly mounted on the side of the second mounting plate opposite to the fixing plate.

[0011] As a further improvement, the conveyor includes a frame, the frame having a base plate and two upwardly extending side baffles fixedly installed on opposite sides of the base plate, two parallel support rollers rotatably installed between the two side baffles, one of the support rollers being driven to rotate by a drive device, a transversely extending conveyor belt connecting the two support rollers, and a plurality of partitions evenly spaced along the length direction fixedly installed on the outer side of the conveyor belt, the partitions being perpendicular to the outer surface of the conveyor belt.

[0012] As a further improvement, the outer surface of the partition is evenly distributed with multiple flexible buffer pillars.

[0013] As a further improvement, the sealing mechanism includes a lifting plate located above the conveyor and driven to move up and down by a third power unit, on which a vertically extending vacuum tube is fixedly installed; two clamping plates located on opposite sides of the vacuum tube are installed on the lifting plate and driven to move closer or further apart by a first telescopic component, the inner side of the clamping plate being provided with an arc-shaped groove that matches the outer wall of the vacuum tube; and two heat-sealing plates located on opposite sides below the vacuum tube are installed on the lifting plate and driven to move closer or further apart by a second telescopic component.

[0014] As a further improvement, a receiving groove is provided on one side of the outer peripheral wall of the upper tank, and the receiving groove is directly opposite the outer side of the outer end of the guide plate.

[0015] As a further improvement, a discharge port is provided on one side of the bottom of the lower tank, and the bottom wall of the lower tank slopes down toward the discharge port.

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

[0017] 1. The upper tank is vibrated by a vibrating motor, which causes the nuts to roll along the inverted conical bottom wall of the upper tank towards the discharge pipe. Dust, impurities, nut fragments and smaller nuts will fall down into the lower tank through the screening holes on the bottom wall of the upper tank, while larger nuts will be discharged through the discharge pipe. This pre-screening of nuts before packaging greatly improves the quality of the packaged nuts.

[0018] 2. After the nuts enter the upper tank, they will spiral along the outer wall of the guide plate to the center of the upper tank, thereby prolonging the residence time of the nuts in the upper tank and improving the screening effect of the nuts.

[0019] 3. The first suction cup lifts the packaging bag located at the top of the placement plate downwards, and the second and first suction cups pull the two sides of the packaging bag in opposite directions respectively, so that the opening of the packaging bag is opened and kept directly below the metering tube, which makes the packaging efficiency of nuts higher.

[0020] 4. When the packaging bag containing nuts falls down onto the conveyor belt, the partition and the two side baffles at the front and back can support the packaging bag at the top of the conveyor belt, preventing the packaging bag from tilting and falling when it falls onto the conveyor belt, and keeping the packaging bag with its opening facing upward as it moves backward with the conveyor belt.

[0021] 5. Multiple flexible buffer columns are evenly distributed on the outer surface of the partition. The friction between the buffer columns and the packaging bag can slow down the falling speed of the packaging bag, so that the packaging bag containing nuts can fall more stably onto the conveyor belt.

[0022] 6. After the lower end of the vacuum tube extends downward into the opening of the packaging bag, the opening of the packaging bag is closed and tightly pressed against the outer wall of the vacuum tube by two clamping plates. The air inside the packaging bag is then extracted through the vacuum tube, and the packaging bag is then heat-sealed by two heat-sealing plates. This results in a higher degree of mechanization in the packaging of nuts. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 It is a structural diagram of an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the lower tank body according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the upper tank body according to an embodiment of the present invention;

[0027] Figure 4 This is a cross-sectional schematic diagram of the upper tank body according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the quantitative discharging mechanism according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the first suction cup rotating to the bottom of the first mounting plate according to an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the first mounting plate according to an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of the second mounting plate according to an embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the conveyor structure according to an embodiment of the present invention;

[0033] Figure 10 This is a schematic diagram of the partition structure according to an embodiment of the present invention;

[0034] Figure 11 This is a structural schematic diagram of the sealing mechanism according to an embodiment of the present invention.

[0035] In the diagram: 1-Lower tank; 2-Upright frame; 3-Cylinder; 4-Upper tank; 5-Screening hole; 6-Vibrating motor; 7-Lower support plate; 8-Upper support plate; 9-Spring; 10-Discharge pipe; 11-Discharge port; 12-Guide plate; 13-Receiving trough; 14-Horizontal plate; 15-Quantitative tube; 16-Hose; 17-First insert plate; 18-Second insert plate; 19-Horizontal cylinder; 20-Support base; 21-Mounting frame; 22-Vertical cylinder; 23-Mounting shaft; 24-Adjusting motor; 25-Swing arm; 26-First mounting plate; 27-First suction cup; 28-Placement plate; 29-Packaging bag; 30-Fixing plate; 31-Second mounting plate; 32-First electric push rod; 33-Second suction cup; 34-Conveyor; 35-Frame; 36-Base plate; 37-Side baffle; 38-Support roller; 39-Conveyor belt; 40-Partition plate; 41-Lifting plate; 42-Second electric push rod; 43-Vacuum tube; 44-Clamping plate; 45-First small cylinder; 46-Support; 47-Arc groove; 48-Heat sealing plate; 49-Second small cylinder; 50-Buffer column. Detailed Implementation

[0036] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] like Figures 1 to 11 As shown, a multi-functional pneumatic nut quantitative vacuum sealing packaging machine with a grading structure includes a lower tank 1. A support frame 2 is fixedly installed at the bottom of the lower tank 1. Specifically, the support frame 2 consists of four vertically extending cylinders 3 arranged in a rectangular array at the bottom of the lower tank 1. The upper ends of the cylinders 3 are bolted or welded to the bottom of the lower tank 1, providing support. A cylindrical upper tank 4 is movably installed inside the upper end of the lower tank 1. Both the lower tank 1 and the upper tank 4 are circular. The upper tank 4 is fitted inside the upper end of the lower tank 1. Multiple screening holes 5 are evenly distributed on the bottom wall of the upper tank 4. A motor mounting plate is bolted to the top of the upper tank 4, and a vibration motor 6 is bolted to the motor mounting plate. In addition, multiple lower support plates 7 are fixedly installed circumferentially at uniform intervals on the outer wall of the lower tank 1, and upper support plates 8 corresponding to the lower support plates 7 are fixedly installed circumferentially at uniform intervals on the outer wall of the upper tank 4. The upper support plates 8 are located above the corresponding lower support plates 7. A spring 9 is connected between the lower support plate 7 and the corresponding upper support plate 8. The two ends of the spring 9 are fixedly connected to the lower support plate 7 and the upper support plate 8 by bolts or welding, respectively. The setting of the spring 9 can increase the amplitude of the vibration of the upper tank 4 driven by the vibration motor 6.

[0038] like Figure 2 and Figure 4 As shown, the bottom wall of the upper tank 4 is inverted cone shape. A discharge pipe 10 extending downward is welded to the center of the bottom of the upper tank 4. The upper end of the discharge pipe 10 is connected to the upper tank 4, and the lower end passes downward through the bottom wall of the lower tank 1. A reserved hole is provided on the bottom wall of the lower tank 1 through which the discharge pipe 10 passes.

[0039] In use, the nuts to be packaged are added to the upper tank 4, the vibration motor 6 is turned on, and the upper tank 4 is vibrated. This causes the nuts in the upper tank 4 to roll along the inverted conical bottom wall of the upper tank 4 towards the discharge pipe 10. As the nuts roll towards the discharge pipe 10, dust, impurities, nut fragments, and smaller nuts will fall down into the lower tank 1 through the screening holes 5 on the bottom wall of the upper tank 4. Larger nuts will be discharged through the discharge pipe 10. This pre-screening of the nuts before packaging greatly improves the quality of the packaged nuts. In addition, a discharge port 11 is provided on one side of the bottom of the lower tank 1. The bottom wall of the lower tank 1 is inclined downwards towards the discharge port 11 so that the screened nut fragments and smaller nuts can be discharged through the discharge port 11 for further processing.

[0040] like Figure 3 As shown, a spiral-shaped guide plate 12 is welded to the inner side of the bottom wall of the upper tank 4, and the discharge pipe 10 is located at the center of the guide plate 12. A receiving groove 13 is welded to one side of the outer peripheral wall of the upper tank 4. The receiving groove 13 is connected to the upper tank 4 and is directly opposite the outer end of the guide plate 12. In actual use, nuts to be packaged can be added to the receiving groove 13 by a screw feeder. The nuts then enter the upper tank 4 through the receiving groove 13 and spirally roll along the outer wall of the guide plate 12 to the center of the upper tank 4, thereby extending the residence time of the nuts in the upper tank 4 and improving the screening effect of the nuts.

[0041] like Figure 5As shown, the lower end of the discharge pipe 10 is connected to a quantitative discharge mechanism. The quantitative discharge mechanism includes a horizontal plate 14 fixedly mounted on four cylinders 3 by bolts. A vertically extending quantitative tube 15 is welded onto the horizontal plate 14. The quantitative tube 15 is coaxially arranged with the discharge pipe 10. The upper end of the quantitative tube 15 is connected to the lower end of the discharge pipe 10 by a flexible hose 16, which can prevent the stability of the quantitative tube 15 from being affected when the lower tank 1 and the discharge pipe 10 vibrate. The metering tube 15 has a transverse insertion port on one side that penetrates its side wall. There are two insertion ports arranged opposite each other, and a horizontal plate 14 is located between the two insertion ports. A first insertion plate 17 for preventing the material in the metering tube 15 from falling is slidably installed in the upper insertion port, and a second insertion plate 18 for preventing the material in the metering tube 15 from falling is slidably installed in the lower insertion port. The ends of the first insertion plate 17 and the second insertion plate 18 that extend into the metering tube 15 are both arc-shaped and conform to the inner wall of the metering tube 15. The width of the first insertion plate 17 and the second insertion plate 18 are both consistent with the inner diameter of the metering tube 15. The first insertion plate 17 and the second insertion plate 18 are respectively driven by pneumatic components to insert into or withdraw from the metering tube 15. The pneumatic component is a horizontal cylinder 19 with a piston rod extending laterally. Support seats 20 are fixedly installed on the upper and lower sides of the horizontal plate 14 by bolts. Horizontal cylinders 19 are installed on the two support seats 20 respectively. The cylinder body of the horizontal cylinder 19 is fixedly installed on the corresponding support seat 20 by bolts. One end of the first insert plate 17 and the second insert plate 18 are fixedly installed on the piston rod of the corresponding horizontal cylinder 19 by bolts.

[0042] Initially, both the first insert plate 17 and the second insert plate 18 are inserted into the metering tube 15. After being screened by the upper tank body 4, the nuts sequentially enter the metering tube 15 located above the first insert plate 17 through the discharge pipe 10 and the hose 16. First, the corresponding horizontal cylinder 19 retracts, causing the first insert plate 17 to be pulled out of the metering tube 15, thereby filling the metering tube 15 located above the second insert plate 18 with nuts. Then, the corresponding horizontal cylinder 19 extends, causing the first insert plate 17 to be reinserted into the metering tube 15, and the corresponding horizontal cylinder 19 retracts, causing the second insert plate 18 to be pulled out of the metering tube 15, thereby causing the metered volume of nuts in the metering tube 15 located between the first insert plate 17 and the second insert plate 18 to be discharged through the lower end of the metering tube 15.

[0043] like Figures 5 to 8As shown, a bag-supporting mechanism is provided below the quantitative discharging mechanism. The bag-supporting mechanism includes a mounting frame 21 located below the horizontal plate 14 and driven to rise and fall by a first power device. The mounting frame 21 is slidably mounted on two cylinders 3 located on the right side. The first power device is specifically a vertical cylinder 22 with a piston rod extending downward. The cylinder body of the vertical cylinder 22 is fixedly mounted on the horizontal plate 14 by bolts, and the mounting frame 21 is fixedly mounted on the piston rod of the vertical cylinder 22 by bolts. Two vertical plates arranged opposite each other are welded to the bottom of the mounting frame 21. A horizontally extending mounting shaft 23 is rotatably mounted between the two vertical plates through a bearing. An adjusting motor 24 for driving the mounting shaft 23 to rotate is bolted to the top of the mounting frame 21. The rotating shaft of the adjusting motor 24 is connected to the mounting shaft 23 through a pair of meshing bevel gears. A swing arm 25 is fixedly mounted on the mounting shaft 23. The swing arm 25 is L-shaped and the swing arm 25 is... The swing arm 25 is set perpendicular to the mounting shaft 23 on the plane. One end of the swing arm 25 extends vertically upward and is fixed to the mounting shaft 23 by bolts. The other end of the swing arm 25 extends horizontally to the left and closer to the metering tube 15. Two swing arms 25 are arranged opposite each other. A first mounting plate 26 is fixed to the end of the two swing arms 25 away from the mounting shaft 23 by bolts. A first suction cup 27 is fixed to the side of the first mounting plate 26 away from the swing arm 25 by bolts. Two first suction cups 27 are arranged opposite each other. A placement plate 28 is provided on the right side of the stand 2. The placement plate 28 is fixed to the frame 35 of the conveyor 34 by support rods. A stack of packaging bags 29 is placed on the top of the placement plate 28. By adjusting the motor 24, the mounting shaft 23 is driven to rotate counterclockwise by 90 degrees. The mounting shaft 23 drives the first mounting plate 26 to rotate through the swing arm 25, so that the first suction cup 27 rotates to the bottom of the first mounting plate 26. Figure 6As shown, the placement plate 28 is located below the first suction cup 27, so that the mounting bracket 21 can be moved down by the extension of the vertical cylinder 22 and the first suction cup 27 can pick up the packaging bag 29 located at the top of the placement plate 28. A fixing plate 30 is bolted to two cylinders 3 on the left side. The fixing plate 30 and the mounting bracket 21 are located on the left and right sides of the metering tube 15, respectively. A second mounting plate 31, driven by a second power device and moving left and right along the radial direction of the metering tube 15, is located on the right side of the fixing plate 30. The second power device is a first electric push rod 32 extending laterally. Two first electric push rods 32 are arranged side by side. One end of the first electric push rod 32 is bolted to the fixing plate 30, and the other end is bolted to the second mounting plate 31. A second suction cup 33 is bolted to the side of the second mounting plate 31 opposite to the fixing plate 30. Two second suction cups 33 are also arranged opposite each other. Both the first suction cup 27 and the second suction cup 33 are connected to a negative pressure suction device through pipes. When the first suction cup 27 sucks down the packaging bag 29 located at the top of the placement plate 28, it first passes through... The vertical cylinder 22 retracts, causing the mounting bracket 21 to rise to its initial height. Then, the adjusting motor 24 drives the mounting shaft 23 to rotate 90 degrees clockwise to return to its original position. The mounting shaft 23, through the swing arm 25, drives the first mounting plate 26 to rotate, causing the first suction cup 27, along with the suctioned packaging bag 29, to rotate to the left side of the first mounting plate 26. At this time, the first suction cup 27 and the second suction cup 33 are at the same height. Subsequently, the first electric push rod 32 extends, causing the second mounting plate 31 to move to the right. The second mounting plate 31 drives the second suction cup 33 to contact the packaging bag 29 adsorbed on the first suction cup 27 to the right. The second suction cup 33 and the first suction cup 27 respectively adsorb the left and right sides of the packaging bag 29. Then, the first electric push rod 32 retracts, causing the second mounting plate 31 to move to the left to return to its original position. Thus, the second suction cup 33 and the first suction cup 27 pull the two sides of the packaging bag 29 in opposite directions. Figure 5 As shown, the opening of the packaging bag 29 is opened and kept directly below the metering tube 15 so that the packaging bag 29 can receive a metered volume of nuts discharged from the lower end of the metering tube 15.

[0044] A conveyor 34 is located below the bag-supporting mechanism, such as... Figure 9As shown, the conveyor 34 includes a frame 35, the frame 35 is provided with a base plate 36 and two upwardly extending side baffles 37 that are fixedly installed on the front and rear sides of the base plate 36 by bolts. Two parallel support rollers 38 are rotatably installed between the two side baffles 37. The support rollers 38 extend back and forth and are arranged opposite each other left and right. One of the support rollers 38 is driven to rotate by a drive device, which can be a motor. A transversely extending conveyor belt 39 is connected between the two support rollers 38. Multiple partitions 40 that are evenly spaced along the length direction are fixedly installed on the outer side of the conveyor belt 39 by bolts. The partitions 40 are perpendicular to the outer surface of the conveyor belt 39. After a measured volume of nuts falls into the packaging bag 29 below the metering tube 15, both the first suction cup 27 and the second suction cup 33 stop adhering to the packaging bag 29, causing the packaging bag 29 containing nuts to fall downwards to the top of the conveyor belt 39 located between two adjacent partitions 40. The partitions 40 and the two side baffles 37 at the front and rear can support the packaging bag 29 at the top of the conveyor belt 39, preventing the packaging bag 29 from tilting or tipping when it falls onto the conveyor belt 39, and keeping the packaging bag 29 with its opening facing upwards as it moves backwards with the conveyor belt 39.

[0045] In addition, such as Figure 10 As shown, multiple flexible buffer columns 50 are evenly distributed on the outer surface of the partition 40. The partition 40 can be made of rubber. The buffer columns 50 are integrally formed or bonded to the partition 40. When the packaging bag 29 falls down between the two partitions 40, the friction between the buffer column 50 and the packaging bag 29 slows down the falling speed of the packaging bag 29, so that the packaging bag 29 containing nuts falls more stably onto the conveyor belt 39.

[0046] A sealing mechanism is provided on the conveyor 34 located downstream of the bag-supporting mechanism, such as... Figure 9 and Figure 11As shown, the sealing mechanism includes a lifting plate 41 located above the conveyor 34, which is driven to rise and fall by a third power device. Specifically, the third power device is a vertically extending second electric push rod 42. Specifically, two opposing second electric push rods 42 are installed on the outer sides of the front and rear side baffles 37, respectively. The lower ends of the second electric push rods 42 are fixedly mounted on the corresponding side baffles 37 by bolts, and the upper ends of the second electric push rods 42 are fixedly connected to the lifting plate 41 by bolts. A vertically extending vacuum pipe 43 is fixedly mounted on the lifting plate by bolts, and the upper end of the vacuum pipe 43 is connected to a vacuum pump via a pipeline. Two clamping plates 44, driven to move closer or further apart by a first telescopic component, are respectively located on the left and right sides of the lower end of the vacuum pipe 43. The first telescopic component can be a first small cylinder 45. Supports 46 are fixedly mounted on the left and right sides of the bottom of the lifting plate by bolts. Two sets of first small cylinders 45 are arranged opposite each other on the left and right. The cylinder body of the first small cylinder 45 is fixedly mounted on the corresponding support 46 by bolts. The piston rod of the first small cylinder 45 extends inward. Two clamping plates 44 are respectively fixedly mounted on the piston rod of the corresponding first small cylinder 45 by bolts. The inner side of the clamping plate 44 is provided with an arc-shaped groove 47 that matches the outer wall of the vacuum tube 43. Two heat-sealing plates 48 are respectively provided on the left and right sides below the vacuum tube 43, which are driven to move closer or further apart by the second telescopic component. The second telescopic component can be a second small cylinder 49. Two sets of second small cylinders 49 are arranged opposite each other on the left and right. The cylinder body of the second small cylinder 49 is fixedly mounted on the corresponding support 46 by bolts. The piston rod of the second small cylinder 49 extends inward. Two heat-sealing plates 48 are respectively fixedly mounted on the piston rod of the corresponding second small cylinder 49 by bolts.

[0047] After the packaging bag 29 containing nuts falls onto the conveyor belt 39, it is transported downstream by the conveyor belt 39. When the conveyor belt 39 moves the packaging bag 29 containing nuts directly below the lifting plate 41, it stops moving and the second electric push rod 42 retracts to lower the lifting plate 41. The lifting plate 41 causes the lower end of the vacuum tube 43 to extend downward into the opening of the packaging bag 29. First, the first small cylinder 45 extends to move the two clamping plates 44 closer together to clamp the opening of the packaging bag 29. The two clamping plates 44 close the opening of the packaging bag 29 and press it tightly against the outer wall of the vacuum tube 43, and the air inside the packaging bag 29 is extracted through the vacuum tube 43. Then, the second small cylinder 49 extends to move the two heat sealing plates 48 to clamp the packaging bag 29 located below the vacuum tube 43, and heat seal the packaging bag 29.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-functional pneumatic nut quantitative vacuum sealing and packaging machine with a grading structure, characterized in that: The device includes a lower trough, a support frame fixedly installed at the bottom of the lower trough, and a cylindrical upper trough movably installed at the upper end of the lower trough. Multiple screening holes are evenly distributed on the bottom wall of the upper trough, and a vibrating motor is installed on the upper trough. The bottom wall of the upper trough is inverted conical, and a discharge pipe extending downwards and exiting the outer side of the lower trough is located at the center of the bottom of the upper trough. A spiral-shaped guide plate is fixedly installed on the inner side of the bottom wall of the upper trough, and the discharge pipe is located at the center of the guide plate. A quantitative discharge mechanism is connected to the lower end of the discharge pipe, a bag-supporting mechanism is located below the quantitative discharge mechanism, a conveyor is located below the bag-supporting mechanism, and a sealing mechanism is located on the conveyor downstream of the bag-supporting mechanism. A lower support plate is fixedly installed on the outer wall of the lower tank, and an upper support plate located above the lower support plate is fixedly installed on the outer wall of the upper tank. A spring connects the lower support plate and the upper support plate. The quantitative dispensing mechanism includes a horizontal plate fixedly installed on the upright frame, a vertically extending quantitative tube fixedly installed on the horizontal plate, and the upper end of the quantitative tube and the lower end of the dispensing tube connected by a flexible hose; a first insert plate for blocking the material in the quantitative tube from falling is movably installed on the quantitative tube, and a second insert plate for blocking the material in the quantitative tube from falling is movably installed on the quantitative tube below the first insert plate; the first insert plate and the second insert plate are respectively driven by pneumatic components to insert into or withdraw from the quantitative tube. A material receiving groove is provided on one side of the outer peripheral wall of the upper tank, and the material receiving groove is directly opposite the outer side of the outer end of the guide plate. The bottom of the lower tank is provided with a discharge port on one side, and the bottom wall of the lower tank slopes down toward the discharge port.

2. The multi-functional pneumatic nut quantitative vacuum sealing and packaging machine with a graded structure as described in claim 1, characterized in that: The bag-supporting mechanism includes a mounting frame located below the horizontal plate and driven to rise and fall by a first power device. A horizontally extending mounting shaft, driven to rotate by an adjusting motor, is mounted on the mounting frame. A swing arm is fixedly mounted on the mounting shaft, with the plane of the swing arm perpendicular to the mounting shaft. A first mounting plate is fixedly mounted on the end of the swing arm away from the mounting shaft. A first suction cup is fixedly mounted on the side of the first mounting plate opposite to the swing arm. A placement plate for placing packaging bags is provided on one side of the upright frame. When the mounting shaft drives the first suction cup to rotate to the bottom of the first mounting plate, the placement plate is located below the first suction cup. A fixing plate is fixedly mounted on the upright frame. The mounting frame and the fixing plate are located on opposite sides of the metering tube. A second mounting plate, driven by a second power device and moving radially along the metering tube, is provided on the side of the fixing plate closest to the metering tube. A second suction cup is fixedly mounted on the side of the second mounting plate opposite to the fixing plate.

3. The multi-functional pneumatic nut quantitative vacuum sealing and packaging machine with a graded structure as described in claim 1, characterized in that: The conveyor includes a frame, the frame having a base plate and two upwardly extending side baffles fixedly installed on opposite sides of the base plate. Two parallel support rollers are rotatably installed between the two side baffles, one of which is driven to rotate by a drive device. A transversely extending conveyor belt is connected between the two support rollers. Multiple partitions are fixedly installed on the outer side of the conveyor belt, evenly spaced along its length, and the partitions are perpendicular to the outer surface of the conveyor belt.

4. The multi-functional pneumatic nut quantitative vacuum sealing and packaging machine with a graded structure as described in claim 3, characterized in that: The outer surface of the partition is evenly distributed with multiple flexible buffer columns.

5. The multi-functional pneumatic nut quantitative vacuum sealing and packaging machine with a graded structure as described in claim 1, characterized in that: The sealing mechanism includes a lifting plate located above the conveyor and driven to move up and down by a third power unit, with a vertically extending vacuum tube fixedly installed on the lifting plate; two clamping plates located on opposite sides of the vacuum tube are installed on the lifting plate and driven to move closer or further apart by a first telescopic component, with an arc-shaped groove on the inner side of the clamping plate that matches the outer wall of the vacuum tube; and two heat-sealing plates located on opposite sides below the vacuum tube are installed on the lifting plate and driven to move closer or further apart by a second telescopic component.

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