A powder packaging device and an iron phosphate powder packaging apparatus thereof

Abstract

The application provides a powder packaging device and a ferric phosphate powder packaging equipment thereof, which comprises a bracket with a negative pressure pump, a material tank and its internal structure, a packaging bag opening clamping and adjusting mechanism, and a closed packaging mechanism. The material tank is divided into a feeding bin and a storage bin, and is provided with a dust filtering cartridge and a spiral material conveying rod and other components to ensure that the powder smoothly enters the storage bin. The packaging bag is automatically clamped and opened by the eccentric clamping shaft and the suction cups on the rhombic frame, which facilitates the filling of the powder. After the filling is completed, the packaging bag is moved into the fixed cover body, the air in the bag is discharged by the inflation and extrusion method, and the heat sealing treatment is performed by using the electric heat sealing strip. In addition, the device is provided with a weighing sensor, a dust removal vibration motor, a spiral dust setting piece and other auxiliary functions, as well as a dust removal ring and a valve disc mechanism for controlling the opening and closing of the bag mouth. The application not only improves the efficiency and environmental protection of the powder packaging, but also simplifies the packaging process, reduces the equipment cost and space requirement, and is especially suitable for the packaging of powders such as ferric phosphate.

Description

Technical Field

[0001] This invention belongs to the field of powder packaging, and relates to a powder packaging device and its iron phosphate powder packaging equipment. Background Technology

[0002] With the continuous advancement of modern industrial technology, ultrafine powders, due to their unique physical and chemical properties, have been widely used in various fields such as lithium battery materials, catalysts, pharmaceuticals, and cosmetics. In particular, iron phosphate (FePO4), as an important component of lithium-ion battery cathode materials, has seen continuous market demand growth. However, the problems encountered in the production and packaging of ultrafine powders are becoming increasingly prominent, especially in the packaging stage.

[0003] Most powder packaging equipment on the market currently adopts an assembly line production model, separating the filling and sealing processes. This not only increases the length and complexity of the production line but also raises equipment costs. Furthermore, traditional powder packaging equipment typically relies on a screw conveyor system to quantitatively supply materials, transporting powder from below to a storage hopper at the top via a screw conveyor. While this method can meet certain accuracy requirements, the screw conveyor needs to be angled to allow for direct feeding, further increasing the length of the packaging equipment, occupying more production space, and hindering a compact factory layout.

[0004] Furthermore, ultrafine powders are highly prone to generating dust during packaging. Ferric phosphate, as a typical ultrafine powder, easily releases dust into the air during packaging, leading to a significant increase in dust levels within the packaging workshop. High concentrations of dust not only affect the cleanliness of the production environment and increase the workload of cleaning and maintenance, but more importantly, they pose a serious threat to the health of workers. Long-term exposure to high dust levels can lead to respiratory diseases and other occupational hazards for workers. Summary of the Invention

[0005] The purpose of this invention is to provide a powder packaging device that adopts an integrated design for loading and sealing, and uses vacuum feeding to reduce the equipment footprint. Furthermore, it performs efficient dust removal during the packaging process to ensure a clean and safe working environment and protect the health of operators.

[0006] To solve the above-mentioned technical problems, the present invention provides a powder packaging device, including a support frame, a negative pressure pump installed on one side of the support frame, a mounting frame arranged forward on the top of the support frame, a material tank installed on the mounting frame, the material tank being divided into an upper feeding bin and a lower storage bin by a partition, a feeding pipe connected to the feeding bin being arranged outward from the upper end of the material tank, the feeding pipe being connected to a suction hose, a negative pressure isolation cover being arranged downward from the top of the feeding bin, the outer diameter of the negative pressure isolation cover being smaller than the inner diameter of the feeding bin, a gap being left between the lower edge of the negative pressure isolation cover and the partition, a dust filter cartridge being arranged inside the negative pressure isolation cover at the top of the feeding bin, a negative pressure port being arranged at the top of the material tank communicating with the dust filter cartridge, and the negative pressure port being connected to the inlet end of the negative pressure pump through a negative pressure pipe;

[0007] The lower part of the material tank is conical. A feeding pipe communicating with the storage silo is installed at the lower end of the material tank. A drive motor is installed at the upper end of the material tank. The power output shaft of the drive motor is connected to a rotating shaft that extends downward through the partition and into the storage silo. A rotating hole with a sealed rotatable connection to the rotating shaft is opened at the bottom of the dust filter cartridge. A spiral conveying rod extending upward into the lower end of the feeding pipe is connected to the lower end of the rotating shaft. A negative pressure isolation discharge cylinder is provided at the lower end of the partition. The negative pressure isolation discharge cylinder is a horizontally arranged cylindrical shape. The upper end of the negative pressure isolation discharge cylinder has a feed port communicating with the feed hopper, and the lower end of the negative pressure isolation discharge cylinder has a discharge port communicating with the storage hopper. A horizontal shaft arranged along its length is rotatably connected inside the negative pressure isolation discharge cylinder. Multiple baffles arranged in a circular pattern and in contact with the inner wall of the negative pressure isolation discharge cylinder are arranged outside the horizontal shaft. A discharge motor for driving the horizontal shaft to rotate is installed on the side wall of the material tank.

[0008] A lifting drive mechanism is provided on the side of the bracket near the mounting frame. The lifting drive mechanism is connected to a lifting frame. Support arms are provided on both the left and right sides of the lifting frame. Each support arm is rotatably connected to two eccentric clamping shafts arranged in opposite directions at its free end. Each eccentric clamping shaft is rotatably connected to the corresponding support arm at its eccentric point. The two eccentric clamping shafts on the same support arm clamp the opening edge of the packaging bag by rotating and cooperating. Each support arm is provided with a clamping drive assembly for driving the rotation of the corresponding two eccentric clamping shafts.

[0009] Each support arm is equipped with a telescopic motor at its free end, which is arranged along the length of the eccentric clamping shaft. The telescopic shafts of the two telescopic motors are connected to a rhomboid frame that moves in the horizontal plane. The rhomboid frame is composed of four connecting rods that are rotatably connected end to end. There are suction cups that can move with the frame at both the front and rear ends. The openings of the two suction cups are arranged opposite each other to stick to the two side walls of the packaging bag.

[0010] The lower end of the bracket is provided with a base facing forward. A fixed cover with a front opening is provided on the side of the base near the bracket. A movable cover with an upper opening is hinged to the side of the base near the fixed cover. The base is provided with a mounting groove facing downward. An electric hydraulic telescopic rod is rotatably connected to the end of the mounting groove away from the bracket. The free end of the electric hydraulic telescopic rod is rotatably connected to the lower end of the movable cover. A first rubber sealing ring is provided at the edge of the opening end of the fixed cover. A second rubber sealing ring is provided at the edge of the opening end of the movable cover.

[0011] The outlet end of the negative pressure pump is connected to an air outlet pipe, which is connected to an exhaust pipe, a first air injection pipe, and a second air injection pipe. Each of the exhaust pipe, the first air injection pipe, and the second air injection pipe is equipped with a solenoid valve. The first air injection pipe is connected to and communicates with the fixed cover. An air injection cylinder, communicating with the second air injection pipe, is horizontally installed at the upper end of the fixed cover. An electric heating seal is installed in the fixed cover on the front side of the air injection cylinder. Multiple piston tubes are connected forward from the front side of the air injection cylinder. Multiple piston shafts, corresponding to and slidably connected to the piston tubes, are installed backward from the rear side of the electric heating seal. A sealing support strip, cooperating with the electric heating seal, is installed in the movable cover away from its hinge point.

[0012] By adopting the above technical solution, when packaging powder, the suction hose is first inserted into the material tank containing the powder, and the negative pressure pump is started. At this time, the exhaust pipe is opened to exhaust, generating negative pressure suction to draw the powder into the feeding hopper along the suction hose. The negative pressure isolation cover acts as a barrier to prevent the powder from being directly adsorbed onto the dust filter cartridge, allowing the powder to sink directly to the bottom of the feeding hopper. The spiral dust settling plate acts as a dust settling plate to prevent excessive dust from being adsorbed onto the dust filter cartridge and sliding into the negative pressure isolation discharge cylinder along the feed port. The discharge motor drives the baffle to rotate, and while maintaining the pressure separation between the feeding hopper and the storage hopper, the powder falls from the discharge port into the storage hopper.

[0013] The operator takes a packaging bag, keeps the opening flat, and inserts it from bottom to top between the two eccentric clamping shafts on both sides. The clamping drive assembly drives the two eccentric clamping shafts to rotate simultaneously, clamping the two sides of the packaging bag opening. Then, the two telescopic motors shorten simultaneously, and the diamond frame flattens outwards and backwards, causing the two suction cups to press inwards and suck up the outer wall of the packaging bag. After suction, the telescopic motors extend simultaneously, and the diamond frame becomes pointed outwards and backwards, causing the two suction cups to move outwards simultaneously, pulling open the packaging bag. The lifting drive mechanism drives the lifting frame to move upwards, moving the packaging bag upwards so that the feeding tube can be inserted into it. The drive motor drives the spiral conveyor rod to rotate, gradually adding the powder in the storage cylinder into the packaging bag until the filling is completed.

[0014] After the packaging bag is filled, the lifting drive mechanism drives the lifting frame to descend, placing the packaging bag inside the fixed cover. The electric hydraulic telescopic rod extends and drives the movable fixed cover to rotate upward until it fits against the fixed cover, with the bag opening protruding outside. The suction cup separates from the packaging bag, the negative pressure pump is started, the first air injection pipe is opened, the feed pipe is opened, and air is injected between the fixed cover and the movable cover. At the same time, powder is drawn and added into the feed hopper. The air pressure inside the fixed cover and the movable cover increases, gradually squeezing out the air from the packaging bag. After it is completely squeezed out, the second air injection pipe is opened to inject air into the air injection cylinder, pushing the electric heating seal strip to squeeze and tighten the bag opening towards the sealing support strip. The electric heating seal strip is also energized to heat-seal the opening of the packaging bag.

[0015] After sealing, the electric hydraulic telescopic rod drives the movable fixed cover to rotate downwards and reset. The electric telescopic rod then drives the eccentric clamp shaft to rotate in the opposite direction to loosen the two sides of the packaging bag, thus completing one powder packaging process.

[0016] The present invention is further configured such that the outer wall of the material tank is provided with a plurality of support seats, and the lower end of each support seat is connected to the upper end of the mounting frame through a weighing sensor.

[0017] The present invention is further configured such that a dust removal vibration motor is installed at the bottom of the dust filter cartridge.

[0018] The present invention is further configured such that a connecting sleeve rotatably connected to the rotating shaft is vertically arranged below the dust filter cartridge inside the negative pressure isolation hood, and a plurality of spiral dust collection plates distributed in a circular pattern are connected between the outer wall of the connecting sleeve and the inner wall of the negative pressure isolation hood.

[0019] The present invention is further configured such that the lifting drive mechanism includes a slide rail vertically disposed on the front side of the bracket, a lifting drive motor is mounted on the upper end of the slide rail, the power output shaft of the lifting drive motor is connected downward to a threaded shaft, and a threaded sleeve is disposed on the rear side of the lifting frame, which is slidably connected to the slide rail and threadedly connected to the threaded shaft.

[0020] The present invention is further configured such that the front side of the bracket is provided with vertically extending limit grooves on both sides of the slide rail, and the left and right sides of the lifting frame are provided with limit strips that are slidably connected to the corresponding vertical slide rails.

[0021] The present invention is further configured such that each clamping drive assembly includes an electric telescopic rod rotatably connected to the outside of the corresponding support arm, each eccentric clamping shaft extends out of the corresponding support arm and is provided with a transmission gear, two transmission gears on each support arm mesh with each other, one of the transmission gears on each support arm is provided with a transmission arm outward, and the free end of each rotating arm is rotatably connected to the free end of the corresponding electric telescopic rod.

[0022] The invention is further configured such that each suction cup has a first vertical connecting shaft at the end away from its opening, each connecting rod is rotatably connected to a secondary connecting rod, the free end of each secondary connecting rod is rotatably connected to the corresponding first vertical connecting shaft, each suction cup has a sliding sleeve communicating with it at the end away from its opening, the front and rear rotating joints of the rhomboid frame are rotatably connected to the two connecting rods through a second vertical connecting shaft, each second vertical connecting shaft is provided with a sealing sliding shaft that is slidably connected to the corresponding sliding sleeve, and each sliding sleeve has a vent hole on its side wall away from the position of the corresponding suction cup.

[0023] The present invention is further configured such that the first rubber sealing ring is a first soft rubber strip that can be squeezed open by the gas inside the packaging bag at the upper side of the opening end of the fixed cover, and the second rubber sealing ring is a second soft rubber strip that can be squeezed open by the gas inside the packaging bag at the side of the opening end of the movable cover away from its hinge.

[0024] This invention also discloses a packaging machine for iron phosphate powder. Based on the above-mentioned powder packaging device, a hollow dust removal ring is provided on the outer side of the lower part of the feeding pipe. The lower side of the dust removal ring is a downward-sloping surface. Multiple dust suction holes are opened on the lower side of the dust removal ring. The upper end of the dust removal ring is connected to a dust suction pipe that extends upward along the feeding pipe. The free end of the dust suction pipe is connected to the material pipe and communicates with the feeding hopper. A valve disc that can block the feeding pipe is rotatably connected inside the feeding pipe. A worm gear is provided on one side of the valve disc that extends out of the feeding pipe. A switching motor is installed on the feeding pipe. The power output shaft of the switching motor is connected to a worm that meshes with the worm gear.

[0025] By adopting the above technical solution, the switch motor drives the valve disc to rotate to control the opening and closing. At this time, the negative pressure pump works at low power. The suction force generated by the dust suction hole can suck away the dust that floats up from inside the packaging bag, preventing it from floating out of the packaging bag and polluting the production environment.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] Firstly, this invention uses vacuum feeding instead of traditional spiral feeding, which reduces the space occupied by the spiral conveying pipe and integrates loading and sealing into one unit, resulting in higher equipment integration, smaller space occupation, and lower equipment manufacturing cost.

[0028] Secondly, when packaging powder, the present invention continuously sucks away the dust that rises from inside the packaging bag through the dust removal ring, preventing the dust from floating out of the packaging bag and polluting the production environment. In particular, when packaging powders such as ferric phosphate, it can effectively reduce the harm caused by dust to the human body.

[0029] Thirdly, the present invention uses an air-compression method for vacuum packaging. Compared with the traditional air-extraction vacuum packaging, the negative pressure will not remove the dust inside the packaging bag, thus avoiding the powder from entering the air and polluting the environment, and also preventing the powder inside the packaging bag from decreasing.

[0030] Fourth, the present invention adopts a brand-new packaging bag clamping and opening structure. Its structure is ingenious and simple, which can clamp the packaging bag more stably. When opening the packaging bag, no additional pneumatic structure or complicated pipeline connection is required. It can be achieved through ingenious structural transmission. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 It is a partial sectional view used to show the internal structure of the material tank;

[0033] Figure 3 yes Figure 2 Enlarged view of A in the middle;

[0034] Figure 4 This is a partial sectional view of the material tank;

[0035] Figure 5 Used to demonstrate the positional relationship between the negative pressure isolation hood and the dust filter cartridge;

[0036] Figure 6 Used to show the structural diagram excluding the material tank section;

[0037] Figure 7 Used to display the structure on the lifting frame;

[0038] Figure 8 Used to demonstrate the connection between the diamond-shaped frame and the suction cup;

[0039] Figure 9 Used to display the internal structure of the fixed enclosure;

[0040] Figure 10 Used to display the internal structure of the active enclosure.

[0041] The components include: 1. Bracket; 2. Negative pressure pump; 3. Mounting frame; 4. Material tank; 5. Support base; 6. Weighing sensor; 7. Feed hopper; 8. Storage hopper; 9. Feed pipe; 10. Extraction hose; 11. Negative pressure isolation hood; 12. Dust filter cartridge; 13. Dust removal vibration motor; 14. Negative pressure port; 15. Negative pressure pipe; 16. Connecting sleeve; 17. Spiral dust collection plate; 18. Feeding pipe; 19. Drive motor; 20. Rotary... 21. Shaft; 22. Rotary hole; 23. Screw conveyor rod; 24. Dust removal ring; 25. Dust suction hole; 26. Dust suction pipe; 27. Valve disc; 28. Worm gear; 29. ​​Switch motor; 30. Worm; 31. Negative pressure isolation discharge cylinder; 32. Feed inlet; 33. Discharge outlet; 34. Horizontal shaft; 35. Baffle plate; 36. Discharge motor; 37. Slide rail; 38. Lifting drive motor; 39. Threaded shaft; 40. Lifting frame; 41. Threaded sleeve; 42. Limiting slide groove; 43. Limiting slide bar; 44. Support arm; 45. Eccentric clamping shaft; 46. Electric telescopic rod; 47. Transmission gear; 48. Transmission arm; 49. Telescopic motor; 50. Connecting rod; 51. Suction cup; 52. First vertical connecting shaft; 53. Secondary connecting rod; 54. Sliding sleeve; 55. Second vertical connecting shaft; 56. Sealing slide shaft; 57. Vent hole; 58. Base; 59. Fixed cover 59. Movable cover; 60. Mounting groove; 61. Electro-hydraulic telescopic rod; 62. First rubber sealing ring; 63. Second rubber sealing ring; 64. First soft rubber strip; 65. Second soft rubber strip; 66. Air outlet pipe; 67. Exhaust pipe; 68. First air injection pipe; 69. Second air injection pipe; 70. Solenoid valve; 71. Air injection cylinder; 72. Heating seal strip; 73. Piston tube; 74. Piston shaft; 75. Sealing support strip. Detailed Implementation

[0042] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a powder packaging device and its iron phosphate powder packaging equipment according to the present invention. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, used only to facilitate and clarify the illustration of the embodiments of the present invention. The same or similar reference numerals in the drawings represent the same or similar parts.

[0043] Example, refer to Figure 1-10An embodiment of a powder packaging device, referring to a figure, includes a support 1. A negative pressure pump 2 is installed on one side of the support 1. A mounting frame 3 is provided on the top of the support 1, and a material tank 4 is mounted on the mounting frame 3. Three support seats 5 are provided on the outer wall of the material tank 4. The lower end of each support seat 5 is connected to the upper end of the mounting frame 3 through a weighing sensor 6. The three weighing sensors 6 monitor the weight in the storage tank in real time, and the weight of the bag is calculated by the decrease in weight in the storage tank. The material tank 4 is divided into an upper feeding chamber 7 and a lower storage chamber 8 by a partition. A feeding pipe 9 is provided on the upper end of the material tank 4, communicating with the feeding chamber 7. The feeding pipe 9 is connected to a suction hose 10. A cylindrical negative pressure isolation cover 11 is provided on the top of the feeding chamber 7, with the outer diameter of the negative pressure isolation cover 11 being smaller than the inner diameter of the feeding chamber 7. A gap is left between the lower edge of the negative pressure isolation cover 11 and the partition.

[0044] A dust filter cartridge 12 is installed at the top of the feed hopper 7 inside the negative pressure isolation cover 11. A dust removal vibration motor 13 is installed at the bottom of the dust filter cartridge 12. The vibration motor vibrates periodically to shake off the dust adhering to the dust filter cartridge 12, preventing the dust filter cartridge 12 from clogging after long-term use. A negative pressure port 14 is provided at the top of the material tank 4, which is connected to the dust filter cartridge 12. The negative pressure port 14 is connected to the inlet end of the negative pressure pump 2 through a negative pressure pipe 15. Inside the negative pressure isolation hood 11, below the dust filter cartridge 12, there is a vertically arranged connecting sleeve 16 that is rotatably connected to the rotating shaft 20. The outer wall of the connecting sleeve 16 is connected to the inner wall of the negative pressure isolation hood 11 with multiple spiral dust collection plates 17 arranged in a circular pattern. When the dust passes upward through the gaps between the spiral dust collection plates 17, it can settle more quickly on the spiral dust collection plates 17 due to the blocking effect of the spiral dust collection plates 17, and slide down the spiral dust collection plates 17 to the bottom of the feed hopper 7.

[0045] The lower part of the material tank 4 is conical. A feeding pipe 18 connected to the storage bin 8 is installed at the lower end of the material tank 4. A drive motor 19 is installed at the upper end of the material tank 4. The power output shaft of the drive motor 19 is connected to a rotating shaft 20 that extends downward through the partition and into the storage bin 8. A rotating hole 21 is opened at the bottom of the dust filter cartridge 12 and is sealed and rotatably connected to the rotating shaft 20. A spiral conveying rod 22 that extends upward into the lower end of the feeding pipe 18 is connected to the lower end of the rotating shaft 20. The powder is conveyed downward by rotating the spiral conveying rod 22. A hollow dust removal ring 23 is provided on the outer side of the lower part of the feeding pipe 18. The lower edge of the dust removal ring 23 is a downward sloping surface, which facilitates its downward insertion into the packaging bag. Multiple dust suction holes 24 are opened on the lower edge of the dust removal ring 23. The upper end of the dust removal ring 23 is connected to a dust suction pipe 25 that is set upward along the feeding pipe 18. The free end of the dust suction pipe 25 is connected to the material pipe 4 and is connected to the feeding bin 7. A valve disc 26 that can block the feeding pipe 9 is rotatably connected inside the feeding pipe 9. A worm gear 27 is provided on one side of the valve disc 26 that extends out of the feeding pipe 9. A switching motor 28 is installed on the feeding pipe 9. The power output shaft of the switching motor 28 is connected to a worm 29 that meshes with the worm gear 27. The switching motor 28 drives the valve disc 26 to rotate to control the opening and closing. The suction force generated by the dust suction holes 24 can suck away the dust that floats upward from inside the packaging bag, preventing it from floating out of the packaging bag and polluting the production environment.

[0046] A negative pressure isolation discharge cylinder 30 is provided at the lower end of the partition. The negative pressure isolation discharge cylinder 30 is a horizontally arranged cylindrical shape. The upper end of the negative pressure isolation discharge cylinder 30 has a feed port 31 that communicates with the feed bin 7, and the lower end of the negative pressure isolation discharge cylinder 30 has a discharge port 32 that communicates with the storage bin 8. A horizontal shaft 33 is rotatably connected inside the negative pressure isolation discharge cylinder 30 along its length. Multiple baffles 34 are arranged in a circular pattern and contact the inner wall of the negative pressure isolation discharge cylinder 30 outside the horizontal shaft 33. A discharge motor 35 for driving the horizontal shaft 33 to rotate is installed on the side wall of the material tank 4. When the baffles 34 rotate, two baffles 34 are always in contact with the inner wall of the negative pressure isolation discharge cylinder 30 to prevent the negative pressure in the feed bin 7 from being transmitted to the storage bin 8.

[0047] A lifting drive mechanism is provided on the side of the bracket 1 near the mounting frame 3. The lifting drive mechanism includes a vertical slide rail 36 on the front side of the bracket 1. A lifting drive motor 37 is installed on the upper end of the slide rail 36. The power output shaft of the lifting drive motor 37 is connected downward to a threaded shaft 38. The lifting drive mechanism is connected to a horizontally arranged lifting frame 39. A threaded sleeve 40 is provided on the rear side of the lifting frame 39, which is slidably connected to the slide rail 36 and threadedly connected to the threaded shaft 38. A limiting slide groove 41 is vertically provided on both sides of the slide rail 36 on the front side of the bracket 1. A limiting slide bar 42 is provided on both the left and right sides of the lifting frame 39, which is slidably connected to the corresponding vertical slide rail 36. The lifting frame 39 has a support arm 43 on each of its left and right sides. Each support arm 43 has two eccentric clamping shafts 44 rotatably connected to its free end, which are arranged in opposite directions. Each eccentric clamping shaft 44 is rotatably connected to the corresponding support arm 43 at its eccentric point. The two eccentric clamping shafts 44 on the same support arm 43 clamp the opening edge of the packaging bag by rotating. Each support arm 43 is provided with a clamping drive assembly for driving the rotation of the two corresponding eccentric clamping shafts 44. Each clamping drive assembly includes an electric telescopic rod 45 rotatably connected to the outside of the corresponding support arm 43. Each eccentric clamping shaft 44 extends out of the corresponding support arm 43 and is provided with a transmission gear 46. The two transmission gears 46 on each support arm 43 mesh with each other. One of the transmission gears 46 on each support arm 43 is provided with a transmission arm 47 extending outward. The free end of each rotating arm is rotatably connected to the free end of the corresponding electric telescopic rod 45. The two eccentric clamping shafts 44 can be driven to rotate simultaneously by the extension and retraction of the electric telescopic rod 45.

[0048] Each support arm 43 has a telescopic motor 48 installed on its free end along the length of the eccentric clamping shaft 44. The telescopic shafts of the two telescopic motors 48 are connected to a rhomboid frame that moves in the horizontal plane. The rhomboid frame is composed of four connecting rods 49 that are rotatably connected end to end. There is a suction cup 50 that can move with the frame at both the front and rear. The openings of the two suction cups 50 are set opposite each other to stick to the side walls of the packaging bag. Each suction cup 50 has a first vertical connecting shaft 51 at the end furthest from its opening. Each connecting rod 49 is rotatably connected to a secondary connecting rod 52. The free end of each secondary connecting rod 52 is rotatably connected to the corresponding first vertical connecting shaft 51. The free end of each secondary connecting rod 52 has a connecting hole for rotatably connecting to the corresponding first vertical connecting shaft 51, so that the front and rear sides of the rhombus frame form two small rhombuses. Each suction cup 50 has a sliding sleeve 53 horizontally outwardly connected to the end furthest from its opening. The front and rear rotating joints of the rhombus frame are rotatably connected to the two connecting rods 49 through a second vertical connecting shaft 54. The free end of each connecting rod 49 has a connecting hole for rotatably connecting to the corresponding second vertical connecting shaft 54. Each of the connecting holes of the second vertical connecting shaft 54 ​​is provided with a sealing sliding shaft 55 that is slidably connected to the corresponding sliding sleeve 53. Each sliding sleeve 53 has two ventilation holes 56 on its side wall away from the corresponding suction cup 50. When the telescopic motor 48 is shortened, the diamond frame and the small diamond inside flatten out to the front and back, causing the sealing sliding shaft 55 to slide towards the suction cup 50 until it reaches the suction cup 50. When the telescopic motor 48 is extended, the diamond frame and the small diamond inside sharpen out to the front and back, causing the sealing sliding shaft 55 to slide away from the suction cup 50 until it passes through the ventilation hole 56, making the ventilation hole 56 connected to the suction cup 50. At this time, air enters the suction cup 50, which can separate the suction cup 50 from the packaging bag.

[0049] A base 57 is provided at the lower end of the bracket 1. A fixed cover 58 with a front opening is provided on the side of the base 57 near the bracket 1. A movable cover 59 with an upper opening is hinged to the side of the base 57 near the fixed cover 58. A mounting groove 60 is provided on the lower end of the base 57. An electric hydraulic telescopic rod 61 is rotatably connected to the end of the mounting groove 60 away from the bracket 1. The free end of the electric hydraulic telescopic rod 61 is rotatably connected to the lower end of the movable cover 59. The movable cover 59 can be driven to rotate from horizontal to vertical and fit against the fixed cover 58 by the electric hydraulic telescopic rod 61. A first rubber sealing ring 62 is provided at the edge of the opening end of the fixed cover 58, and a second rubber sealing ring 63 is provided at the edge of the opening end of the movable cover 59. The first rubber sealing ring 62 is a first soft rubber strip 64 that can be squeezed open by the gas inside the packaging bag at the upper edge of the opening end of the fixed cover 58, and the second rubber sealing ring 63 is a second soft rubber strip 65 that can be squeezed open by the gas inside the packaging bag at the side of the opening end of the movable cover 59 away from its hinge, so as to facilitate the packaging bag to be squeezed to release air.

[0050] The outlet end of the negative pressure pump 2 is connected to an air outlet pipe 66, which is connected to an exhaust pipe 67, a first air injection pipe 68 and a second air injection pipe 69. Each of the exhaust pipe 67, the first air injection pipe 68 and the second air injection pipe 69 is equipped with a solenoid valve 70. The first air injection pipe 68 is connected to and communicates with the fixed cover 58. An air injection cylinder 71, which is connected to the second air injection pipe 69, is horizontally installed at the upper end of the fixed cover 58. An electric heating seal 72 is installed in front of the air injection cylinder 71 inside the fixed cover 58. Three piston pipes 73 are connected forward to the front of the air injection cylinder 71. Three piston shafts 74, which are correspondingly and slidably connected to the piston pipes 73, are installed backward to the rear of the electric heating seal 72. When air is injected into the air injection cylinder 71 through the second air injection pipe 69, it can push the electric heating seal 72 to be squeezed towards the sealing support strip 75. A sealing support strip 75, which cooperates with the electric heating seal 72, is installed in the movable cover 59 away from its hinge.

[0051] Working principle: When packaging powder, first insert the suction hose 10 into the material tank containing the powder, start the negative pressure pump 2, and at this time, the exhaust pipe 67 opens to exhaust, generating negative pressure suction to draw the powder into the feeding hopper 7 along the suction hose 10. The negative pressure isolation cover 11 acts as a barrier to prevent the powder from being directly adsorbed onto the dust filter cartridge 12, allowing the powder to sink directly to the bottom of the feeding hopper 7. The spiral dust settling plate 17 acts as a dust settling plate to prevent excessive dust from being adsorbed onto the dust filter cartridge 12 and slides into the negative pressure isolation discharge cylinder 30 along the feed port 31. The discharge motor 35 drives the baffle plate 34 to rotate, and while maintaining the pressure separation between the feeding hopper 7 and the storage hopper 8, the powder falls from the discharge port 32 into the storage hopper 8.

[0052] The operator takes a packaging bag, keeps the opening flat, and inserts it from bottom to top between the two eccentric clamping shafts 44. The electric telescopic rod 45 extends and retracts, driving the two eccentric clamping shafts 44 to rotate simultaneously and clamp the two sides of the packaging bag opening. Then, the two telescopic motors 48 shorten simultaneously, and the diamond frame flattens outward and backward, driving the two suction cups 50 to press inward and suck on the outer wall of the packaging bag. After suction, the telescopic motors 48 extend simultaneously, and the diamond frame becomes pointed outward and backward, driving the two suction cups 50 to move outward simultaneously and pull open the packaging bag opening.

[0053] After the packaging bag is opened, the lifting drive mechanism drives the lifting frame 39 to move upward, which in turn moves the packaging bag upward so that the feeding pipe 18 can be inserted into it. The drive motor 19 drives the spiral conveyor rod 22 to rotate, gradually adding the powder in the storage cylinder into the packaging bag. During the process, the switch motor 28 drives the valve disc 26 to rotate and block the feeding pipe 9. The negative pressure pump 2 operates at low power to generate negative pressure in the dust removal ring 23, which draws the floating dust into the feeding bin 7 through the dust suction hole 24 until the filling is completed.

[0054] After the packaging bag is filled, the lifting drive mechanism drives the lifting frame 39 to descend, placing the packaging bag inside the fixed cover 58. The electric hydraulic telescopic rod 61 extends and drives the movable fixed cover to rotate upward until it fits against the fixed cover 58, and the opening of the packaging bag extends out of it. The suction cup 50 separates from the packaging bag. The negative pressure pump 2 is started, the first air injection pipe 68 is opened, and the feed pipe 9 is opened to inflate the space between the fixed cover 58 and the movable cover 59. At the same time, powder is drawn and added into the feed hopper 7. The air pressure inside the fixed cover 58 and the movable cover 59 increases, gradually squeezing out the air from the packaging bag. After the air is completely squeezed out, the second air injection pipe 69 is opened to inject air into the air injection cylinder 71, pushing the electric heating seal 72 to press and tighten the bag opening towards the sealing support strip 75. The electric heating seal 72 is energized and heated to heat-seal the opening of the packaging bag.

[0055] After sealing is completed, the electric hydraulic telescopic rod 61 drives the movable fixed cover to rotate downwards and reset, and the electric telescopic rod 45 drives the eccentric clamp shaft 44 to rotate in the opposite direction to loosen the two sides of the packaging bag, thus completing one powder packaging.

[0056] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0057] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A powder packaging device, comprising a support (1), a negative pressure pump (2) installed on one side of the support (1), a mounting frame (3) disposed forward on the top of the support (1), a material tank (4) mounted on the mounting frame (3), the material tank (4) being divided by a partition into an upper feeding hopper (7) and a lower storage hopper (8), characterized in that: The material tank (4) is provided with a feed pipe (9) that communicates with the feed bin (7) at the upper end. The feed pipe (9) is connected to a suction hose (10). A negative pressure isolation cover (11) is provided at the top of the feed bin (7) and the outer diameter of the negative pressure isolation cover (11) is smaller than the inner diameter of the feed bin (7). A gap is left between the lower edge of the negative pressure isolation cover (11) and the partition. A dust filter cartridge (12) is provided at the top of the feed bin (7) inside the negative pressure isolation cover (11). A negative pressure port (14) that communicates with the dust filter cartridge (12) is provided at the top of the material tank (4). The negative pressure port (14) is connected to the inlet end of the negative pressure pump (2) through a negative pressure pipe (15). The lower part of the material tank (4) is conical. The lower end of the material tank (4) is provided with a feeding pipe (18) that communicates with the storage bin (8). The upper end of the material tank (4) is equipped with a drive motor (19). The power output shaft of the drive motor (19) is connected to a rotating shaft (20) that extends downward through the partition and into the storage bin (8). The bottom of the dust filter cartridge (12) is provided with a rotating hole (21) that is sealed and rotatably connected to the rotating shaft (20). The lower end of the rotating shaft (20) is connected to a spiral conveying rod (22) that extends upward into the lower end of the feeding pipe (18). The lower end of the partition is provided with a negative pressure isolation feeding cylinder (30). The negative pressure isolation discharge cylinder (30) is a horizontally arranged cylindrical shape. The upper end of the negative pressure isolation discharge cylinder (30) is provided with a feed port (31) communicating with the feed bin (7). The lower end of the negative pressure isolation discharge cylinder (30) is provided with a discharge port (32) communicating with the storage bin (8). A horizontal shaft (33) is rotatably connected inside the negative pressure isolation discharge cylinder (30) along its length direction. Multiple baffles (34) are arranged in a circular pattern and contact the inner wall of the negative pressure isolation discharge cylinder (30) outside the horizontal shaft (33). A discharge motor (35) for driving the horizontal shaft (33) to rotate is installed on the side wall of the material tank (4). The bracket (1) is provided with a lifting drive mechanism on the side near the mounting frame (3). The lifting drive mechanism is connected to a lifting frame (39). The left and right sides of the lifting frame (39) are provided with support arms (43) facing forward. The free end of each support arm (43) is rotatably connected to two eccentric clamping shafts (44) arranged in opposite directions. Each eccentric clamping shaft (44) is rotatably connected to the corresponding support arm (43) at its eccentric point. The two eccentric clamping shafts (44) on the same support arm (43) clamp the opening edge of the packaging bag by rotating cooperation. Each support arm (43) is provided with a clamping drive assembly for driving the two corresponding eccentric clamping shafts (44) to rotate. Each support arm (43) is equipped with a telescopic motor (48) arranged along the length of the eccentric clamp shaft (44) at its free end. The telescopic shafts of the two telescopic motors (48) are connected to a rhomboid frame that moves in the horizontal plane. The rhomboid frame is composed of four connecting rods (49) that are rotatably connected end to end. The front and rear of the rhomboid frame are connected to suction cups (50) that can move with it. The openings of the two suction cups (50) are arranged opposite each other to stick to the two side walls of the packaging bag. The lower end of the bracket (1) is provided with a base (57) facing forward. The side of the base (57) near the bracket (1) is provided with a fixed cover (58) with a front opening facing upward. The side of the base (57) near the fixed cover (58) is hinged with a movable cover (59) with an upper opening. The base (57) is provided with a mounting groove (60) facing downward. The end of the mounting groove (60) away from the bracket (1) is rotatably connected to an electric hydraulic telescopic rod (61). The free end of the electric hydraulic telescopic rod (61) is rotatably connected to the lower end of the movable cover (59). The edge of the opening end of the fixed cover (58) is provided with a first rubber sealing ring (62), and the edge of the opening end of the movable cover (59) is provided with a second rubber sealing ring (63). The outlet end of the negative pressure pump (2) is connected to an air outlet pipe (66), which is connected to an exhaust pipe (67), a first air injection pipe (68), and a second air injection pipe (69). Each of the exhaust pipe (67), the first air injection pipe (68), and the second air injection pipe (69) is equipped with a solenoid valve (70). The first air injection pipe (68) is connected to and communicates with the fixed cover (58). The upper end of the fixed cover (58) is horizontally connected to the second air injection pipe (69). The gas cylinder (71) is connected. An electric heating seal (72) is provided on the front side of the gas cylinder (71) inside the fixed cover (58). Multiple piston tubes (73) are connected forward on the front side of the gas cylinder (71). Multiple piston shafts (74) are provided on the rear side of the electric heating seal (72) and are correspondingly and slidably connected to the piston tubes (73). A sealing support strip (75) that cooperates with the electric heating seal (72) is provided in the movable cover (59) away from its hinge.

2. The powder packaging device according to claim 1, characterized in that: The outer wall of the material tank (4) is provided with multiple support seats (5), and the lower end of each support seat (5) is connected to the upper end of the mounting frame (3) through a weighing sensor (6).

3. The powder packaging device according to claim 1, characterized in that: A dust removal vibration motor (13) is installed at the bottom of the dust filter cartridge (12).

4. The powder packaging device according to claim 1, characterized in that: Inside the negative pressure isolation cover (11), below the dust filter cartridge (12), there is a connecting sleeve (16) that is rotatably connected to the rotating shaft (20). The outer wall of the connecting sleeve (16) and the inner wall of the negative pressure isolation cover (11) are connected to a plurality of spiral dust collection plates (17) that are distributed in a circular pattern.

5. A powder packaging device according to claim 1, characterized in that: The lifting drive mechanism includes a slide rail (36) vertically arranged on the front side of the bracket (1), a lifting drive motor (37) is installed on the upper end of the slide rail (36), the power output shaft of the lifting drive motor (37) is connected downward to a threaded shaft (38), and a threaded sleeve (40) is provided on the rear side of the lifting frame (39) that is slidably connected to the slide rail (36) and threadedly connected to the threaded shaft (38).

6. A powder packaging device according to claim 5, characterized in that: The front side of the bracket (1) is provided with vertically positioned sliding grooves (41) on both sides of the slide rail (36), and the left and right sides of the lifting frame (39) are provided with limiting slide bars (42) that are slidably connected to the corresponding vertical slide rail (36).

7. A powder packaging device according to claim 1, characterized in that: Each clamping drive assembly includes an electric telescopic rod (45) rotatably connected to the outside of the corresponding support arm (43). Each eccentric clamping shaft (44) extends out of the corresponding support arm (43) and is provided with a transmission gear (46). The two transmission gears (46) on each support arm (43) mesh with each other. One of the transmission gears (46) on each support arm (43) is provided with a transmission arm (47) extending outward. The free end of each rotating arm is rotatably connected to the free end of the corresponding electric telescopic rod (45).

8. A powder packaging device according to claim 1, characterized in that: Each suction cup (50) has a first vertical connecting shaft (51) at the end away from its opening. Each connecting rod (49) is rotatably connected to a secondary connecting rod (52). The free end of each secondary connecting rod (52) is rotatably connected to the corresponding first vertical connecting shaft (51). Each suction cup (50) has a sliding sleeve (53) that communicates with it at the end away from its opening. The front and rear rotating joints of the rhomboid frame are rotatably connected to the two connecting rods (49) through the second vertical connecting shaft (54). Each second vertical connecting shaft (54) is provided with a sealing sliding shaft (55) that is slidably connected to the corresponding sliding sleeve (53). Each sliding sleeve (53) has a vent hole (56) on its side wall at the position away from the corresponding suction cup (50).

9. A powder packaging device according to claim 1, characterized in that: The first rubber sealing ring (62) is a first soft rubber strip (64) on the upper side of the opening end of the fixed cover (58) that can be squeezed open by the gas inside the packaging bag, and the second rubber sealing ring (63) is a second soft rubber strip (65) on the side away from the hinge at the opening end of the movable cover (59) that can be squeezed open by the gas inside the packaging bag.

10. A packaging machine for iron phosphate powder, based on a powder packaging device according to any one of claims 1-9, characterized in that: A hollow dust removal ring (23) is provided on the outer side of the lower part of the feeding pipe (18). The lower side of the dust removal ring (23) is a downward inclined surface. Multiple dust suction holes (24) are opened on the lower side of the dust removal ring (23). The upper end of the dust removal ring (23) is connected to a dust suction pipe (25) that is set upward along the feeding pipe (18). The free end of the dust suction pipe (25) is connected to the material tank (4) and communicates with the feed bin (7). A valve disc (26) that can block the feed pipe (9) is rotatably connected inside the feed pipe (9). A worm gear (27) is provided on one side of the valve disc (26) that extends out of the feed pipe (9). A switching motor (28) is installed on the feed pipe (9). The power output shaft of the switching motor (28) is connected to a worm (29) that meshes with the worm gear (27).

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