A polymer dry powder wind-driven dry powder conveying and feeding device

Abstract

This invention relates to the field of dry powder conveying technology, and in particular to a polymer dry powder pneumatically driven dry powder conveying and feeding device. It includes a base plate, and further includes: a limiting collar, which is fixedly connected to the base plate; a storage cylinder, which is disposed inside the limiting collar and coaxially arranged with it; a material drop trough is provided at the bottom of the storage cylinder; a U-shaped frame is fixedly connected to the base plate, with both ends of the U-shaped frame fixedly connected to both ends of the storage cylinder; and a feeding pipe is fixedly connected to one end of the storage cylinder. This invention uses the contact and rotation of multiple partitions within an annular cavity to transfer the dry powder from the bottom to the top of the annular cavity, and then uses the pneumatic force of a conveying fan for conveying and feeding. This ensures that the distance between the dry powder and the adsorption position remains constant, effectively reducing the impact of reduced dry powder storage on the adsorption and conveying distance, and improving the material quantity stability during continuous dry powder conveying.

Description

Technical Field

[0001] This invention relates to the field of dry powder conveying technology, and in particular to a polymer dry powder wind-driven dry powder conveying and feeding device. Background Technology

[0002] Patent document CN119706375B discloses an automatic feeding device for polymer dry powder mixing equipment, belonging to the technical field of polymer dry powder mixing and conveying equipment. It includes a positive pressure conveying component, which includes a powder collection box. A positive and negative pressure regulating component is fixedly connected to the side wall of the powder collection box. A positive pressure conveying pipe is connected between the lower end of the powder collection box and the positive and negative pressure regulating component. A star-shaped unloader is rotatably connected inside the lower end of the powder collection box. A feeding trough is connected to the side wall of the powder collection box.

[0003] In existing technologies, the positive and negative pressure of a fan is typically used to convey polymer dry powder by wind power. The negative pressure end of the wind power conveyor is connected to the silo storing the dry powder, and the dry powder in the silo is adsorbed and fed by the negative pressure adsorption. During the conveying process, the amount of dry powder stored in the silo gradually decreases with continuous adsorption, which gradually increases the distance between the adsorption end of the pipe and the dry powder, causing the adsorption force of the dry powder to gradually decrease. This affects the continuous feeding efficiency of the dry powder and reduces the stability of the material quantity during feeding. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a polymer dry powder wind-driven dry powder conveying and feeding device.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a polymer dry powder wind-driven dry powder conveying and feeding device, including a base plate, and further comprising: The limiting collar is fixedly connected to the base plate; The storage cylinder is set inside the limiting collar and is coaxial with the limiting collar. A material drop groove is opened at the bottom of the storage cylinder. A U-shaped frame is fixedly connected to the bottom plate. The two ends of the U-shaped frame are fixedly connected to the two ends of the storage cylinder. A feeding pipe is fixedly connected to one end of the storage cylinder. Two movable rings are respectively set at both ends between the storage cylinder and the limiting sleeve. The movable rings are slidably connected to the U-shaped frame and are coaxially set with the limiting sleeve. Multiple partitions are fixedly connected between the two movable rings along the circumferential direction. The partitions are slidably attached to the storage cylinder and the limiting sleeve. The material conveying blower is fixedly installed on the base plate. The negative pressure end of the material conveying blower is fixedly connected to the feed pipe. One end of the feed pipe is fixedly connected to the hopper. The hopper is fixedly connected to the top of the limiting collar. The positive pressure end of the material conveying blower is fixedly connected to the material conveying pipe. The drive assembly is mounted on the U-shaped frame and is used to drive the two movable rings to rotate synchronously. The air intake assembly is located on the hopper and is used to provide the gas required for negative pressure flow.

[0006] Preferably, the intake assembly includes: Two circular holes are located at both ends of the hopper; A single-pass pipe is installed on one side of the hopper. Two air inlet pipes are fixedly connected to the sealed end of the single-pass pipe. One end of each air inlet pipe is fixedly connected to two circular holes. A pressure sensor is fixedly installed at the end of the feed pipe closest to the hopper. The detection end of the pressure sensor is located inside the feed pipe.

[0007] Preferably, each circular hole has a mounting bracket fixedly connected inside, and a rotating shaft is rotatably connected to the center of the mounting bracket, with a fan blade fixedly installed at one end of the rotating shaft.

[0008] Preferably, U-shaped tubes are provided on both sides of the hopper. Both ends of the U-shaped tubes penetrate the hopper and extend into the interior of the hopper, where they are fixedly connected to a circular shell. The open end of the circular shell is fixedly connected to the inner wall of the hopper and communicates with the corresponding circular hole. Multiple tangential diversion tubes are fixedly connected to the U-shaped tubes on the outer surface of the hopper. One end of each tangential diversion tube penetrates the corresponding side of the hopper and extends into the interior of the hopper. One-way valves are fixedly installed at both ends of the U-shaped tubes.

[0009] Preferably, a set of sliding frames is slidably connected between two adjacent partitions, and there are two sliding frames in each set. Multiple parallel shearing steel ropes are fixedly connected inside each sliding frame. The shearing steel ropes inside the two sliding frames in the same set form an angle with each other. A shearing assembly is provided on the U-shaped frame, and the shearing assembly is used to drive the sliding frame to move back and forth.

[0010] Preferably, the shearing component includes: Two guide rings are respectively set at both ends of the limiting sleeve and are coaxially arranged with the limiting sleeve. The guide rings are fixedly connected to the U-shaped frame. The guide rings include a parallel section and a wave section. The wave section is located above the parallel section. Two sliding frames in the same group are fixedly connected to each other at their far ends. One end of each connecting strip passes through the corresponding movable ring and is rotatably connected to two limiting rollers. The two adjacent limiting rollers are located on both sides of the guide ring.

[0011] Preferably, the driving component includes: The connecting shaft is rotatably connected to the center of the storage cylinder. Both ends of the connecting shaft are fixedly connected to the drive gear, and both movable rings are fixedly connected to the internal gear ring. Both ends of the storage cylinder are rotatably connected to the mating gear, which meshes with the corresponding drive gear and internal gear ring. The motor is fixedly mounted on a U-shaped frame. One end of the motor's output shaft and connecting shaft are fixedly connected to a drive wheel, and a drive belt connects the two drive wheels.

[0012] Preferably, both ends of the storage cylinder are provided with fixed frames, both fixed frames are fixedly connected to the connecting shaft, and multiple scraper strips are fixedly connected circumferentially between the two fixed frames. The scraper strips slide and fit against the inner arc surface of the storage cylinder.

[0013] Preferably, each of the multiple scraper strips has a guide slope on the side closest to the direction of movement.

[0014] Preferably, flanges are fixedly connected to both ends of the feed pipe, the conveying pipe, and the conveying blower, and adjacent flanges are fixed together by bolts.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention forms an annular cavity by coaxially arranging a storage cylinder and a limiting collar. The dry powder inside the storage cylinder falls under gravity and is transferred from the bottom to the top of the annular cavity by the contact and rotation of multiple baffles in the annular cavity. Then, the material is conveyed by the wind power of the conveying fan, so that the distance between the dry powder and the adsorption position remains constant. This effectively reduces the impact of the reduction in dry powder storage on the adsorption and conveying distance, ensures the continuous feeding efficiency of dry powder, and improves the stability of the material quantity during continuous conveying of dry powder.

[0016] 2. By using one-way valves at both ends of the U-shaped tube to prevent reverse gas flow, the gas flow is prevented from flowing backwards due to airflow convection at both ends of the U-shaped tube. When the gas flows along the U-shaped tube to the space between the two one-way valves, it re-enters the hopper through the tangential diversion pipe. This allows some of the gas to be diverted and re-enter the hopper from both sides. The inclined design of the tangential diversion pipe changes the direction of the gas diversion, so that the diverted airflows on both sides enter the hopper and form a rotating flow field after tangential convection with the mainstream airflow. This improves the suspension stability of dry powder during conveying and enhances the pneumatic conveying effect of dry powder.

[0017] 3. The shearing assembly drives the two sliding frames in the same group to move back and forth. During the movement, the shearing steel ropes inside the two sliding frames form an angle with each other and continuously shear the dry powder between the two partitions, thereby driving the dry powder to move, increasing the looseness of the dry powder, preventing the dry powder from being squeezed and compacted between the limiting collar and the storage cylinder, and breaking up the agglomerated dry powder through the shearing movement of the shearing steel ropes, reducing the impact of dry powder agglomeration on conveying and feeding. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged schematic diagram of the structure at point A in the diagram; Figure 3 For the present invention Figure 1 Enlarged schematic diagram of the structure at point B in the diagram; Figure 4 This is a cross-sectional structural diagram of the present invention; Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point C; Figure 6 This is a schematic diagram of the mating structure of the movable ring, partition, and sliding frame of the present invention; Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point D; Figure 8 This is a schematic diagram of the combined structure of the hopper, single-pass pipe, and air inlet pipe of the present invention; Figure 9 For the present invention Figure 8 Enlarged schematic diagram of the structure at point E in the diagram.

[0019] In the diagram: 1. Base plate; 2. Limiting collar; 3. Storage cylinder; 4. Feed chute; 5. U-shaped frame; 6. Feeding pipe; 7. Movable ring; 8. Partition plate; 9. Conveying fan; 10. Feeding pipe; 11. Hopper; 12. Conveying pipe; 13. Circular hole; 14. Single-pass pipe; 15. Air inlet pipe; 16. Pressure sensor; 17. Mounting bracket; 18. Rotating shaft; 19. Fan blade; 20. U-shaped tube; 21. Circular housing; 22. Tangential diverter pipe; 23. Check valve; 24. Sliding frame; 25. Shearing steel rope; 26. Guide ring; 2601. Parallel section; 2602. Wave section; 27. Connecting bar; 28. Limiting roller; 29. ​​Connecting shaft; 30. Drive gear; 31. Internal gear ring; 32. Matching gear; 33. Motor; 34. Drive wheel; 35. Drive belt; 36. Fixed frame; 37. Scraper bar; 38. Flange. Detailed Implementation

[0020] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0021] like Figures 1 to 9 The polymer dry powder pneumatically driven dry powder conveying and feeding device shown includes a base plate 1, and further includes: Limiting collar 2 is fixedly connected to the base plate 1; The storage cylinder 3 is located inside the limiting collar 2 and is coaxially arranged with the limiting collar 2. The bottom of the storage cylinder 3 is provided with a material discharge groove 4 (e.g., Figure 5 As shown), a U-shaped frame 5 is fixedly connected to the base plate 1. The two ends of the U-shaped frame 5 are fixedly connected to the two ends of the storage cylinder 3, and a feeding pipe 6 is fixedly connected to one end of the storage cylinder 3. Two movable rings 7 are respectively located at both ends between the storage cylinder 3 and the limiting collar 2. Both movable rings 7 are slidably connected to the U-shaped frame 5 and coaxially arranged with the limiting collar 2. Multiple partitions 8 (such as...) are fixedly connected circumferentially between the two movable rings 7. Figure 6 As shown), the partitions 8 are slidably attached between the storage cylinder 3 and the limiting collar 2 (as shown). Figure 5 (as shown) The conveying blower 9 is fixedly installed on the base plate 1. The negative pressure end of the conveying blower 9 is fixedly connected to the feed pipe 10. One end of the feed pipe 10 is fixedly connected to the hopper 11. The hopper 11 is fixedly connected to the top of the limiting collar 2. The positive pressure end of the conveying blower 9 is fixedly connected to the conveying pipe 12. The drive assembly is mounted on the U-shaped frame 5 and is used to drive the two movable rings 7 to rotate synchronously. An air intake assembly is installed on the hopper 11 and is used to provide the gas required for negative pressure adsorption. When conveying and feeding polymer dry powder, the conveying blower 9 is started, generating negative pressure at its negative pressure end. This causes the feed pipe 10 to be negatively pressure-adsorbed, and the dry powder is conveyed along the feed pipe 10 into the conveying blower 9. Then, it is conveyed and fed along the conveying pipe 12 under positive pressure. When the conveying blower 9 is working, the two movable rings 7 are driven to rotate synchronously by the drive component. This causes multiple baffles 8 to fit and rotate in the annular cavity between the storage cylinder 3 and the limiting sleeve 2. The dry powder stored inside the storage cylinder 3 falls along the bottom under the action of gravity. The material trough 4 falls and, as the partition 8 rotates, drops between two adjacent partitions 8. The rotation of the partition 8 transfers the dry powder upward along the annular cavity between the storage cylinder 3 and the limiting sleeve 2. When the two adjacent partitions 8 rotate to the top of the annular cavity and connect with the hopper 11, the hopper 11 uses the negative pressure generated by the conveying blower 9 to adsorb the dry powder between the two adjacent partitions 8 and enter the feed pipe 10 along the hopper 11. Then, the dry powder is conveyed into the feed pipe 12 by the conveying blower 9, thereby conveying and feeding the dry powder. When the hopper 11 generates negative pressure through the action of the conveying blower 9, the air intake component delivers gas into the hopper 11, so that the hopper 11 can provide the gas required for negative pressure flow when the dry powder is adsorbed by negative pressure. When the dry powder stored in the storage cylinder 3 is used up, it is replenished through the feeding pipe 6. This invention forms an annular cavity by coaxially arranging a storage cylinder 3 and a limiting collar 2. The dry powder inside the storage cylinder 3 falls under gravity and is transferred from the bottom to the top of the annular cavity by the contact and rotation of multiple baffles 8 within the cavity. Then, it is conveyed by the air force driven by a conveying fan 9, thus keeping the distance between the dry powder and the adsorption position constant. This prevents the storage height of the dry powder from gradually decreasing during the adsorption process, which would cause the distance between the top of the dry powder and the adsorption position to gradually increase and reduce the adsorption effect. This effectively reduces the impact of the reduction in dry powder storage on the adsorption and conveying distance, ensures the continuous feeding efficiency of dry powder, and improves the stability of the material quantity during continuous conveying of dry powder.

[0022] As a further embodiment of the present invention, the intake assembly includes: Two circular holes 13, two circular holes 13 (as shown) Figure 9 (As shown) are respectively opened at both ends of the hopper 11; A single-pass pipe 14 is disposed on one side of the hopper 11. Two air inlet pipes 15 are fixedly connected to the sealed end of the single-pass pipe 14. One end of each air inlet pipe 15 is fixedly connected to two circular holes 13. A pressure sensor 16 is fixedly installed at the end of the feed pipe 10 near the hopper 11. Figure 3 As shown), the detection end of the pressure sensor 16 is located inside the feed pipe 10; Drying gas is pumped into the single-pass pipe 14. The drying gas enters the two air inlet pipes 15 along the single-pass pipe 14 and enters the hopper 11 through the corresponding circular holes 13. When a negative pressure is generated at the connection between the hopper 11 and the feed pipe 10, the drying gas replenishes the hopper 11 from both ends and converges towards the center of the negative pressure along both sides of the hopper 11. Finally, it enters the feed pipe 10 upwards. When the drying gas moves inside the hopper 11, it drives the dry powder below the hopper 11 to move upwards, thereby ensuring the gas flow inside the hopper 11 and conveying the dry powder. The air pressure inside the feed pipe 10 is detected by the air pressure sensor 16, and the conveying air pressure of the conveying fan 9 is monitored in real time. The controller connected to the air pressure sensor 16 adjusts the pumping pressure of the drying gas according to the air pressure change inside the feed pipe 10, and adjusts the replenishment amount in real time.

[0023] As a further embodiment of the present invention, each of the circular holes 13 is fixedly connected to a mounting bracket 17 (e.g., ...). Figure 9 As shown), a rotating shaft 18 is rotatably connected at the axis of the mounting bracket 17, and a fan blade 19 is fixedly installed at one end of the rotating shaft 18. When the drying gas enters the corresponding circular hole 13 along the air inlet pipe 15, the drying gas comes into contact with the fan blade 19 at one end of the rotating shaft 18, and under the action of airflow, it drives the fan blade 19 and the rotating shaft 18 to rotate. The fan blade 19 disperses the drying gas through the rotational turbulence, avoiding the airflow trajectory of the drying gas entering the hopper 11 being too concentrated, increasing the contact area between the drying gas and the dry powder, and improving the adsorption and conveying efficiency of the dry powder.

[0024] As a further embodiment of the present invention, U-shaped tubes 20 are provided on both sides of the hopper 11. Both ends of the U-shaped tubes 20 penetrate the hopper 11 and extend into the interior of the hopper 11, and are fixedly connected to a circular shell 21. The open end of the circular shell 21 is fixedly connected to the inner wall of the hopper 11 and is partially connected to the corresponding circular hole 13. Multiple tangential diversion tubes 22 are fixedly connected to the surface of the U-shaped tubes 20 on the outside of the hopper 11. One end of each tangential diversion tube 22 penetrates the corresponding side of the hopper 11 and extends into the interior of the hopper 11. One-way valves 23 are fixedly installed on both ends of the U-shaped tubes 20. Dry gas enters the hopper 11 through the circular holes 13 at both ends. The main gas flows directly towards the feed pipe 10 under negative pressure inside the hopper 11, and performs pneumatic conveying of the dry powder. As the gas moves through the circular holes 13, it enters the circular shell 21 through the connection between the circular holes 13 and the circular shell 21, and moves inside the U-shaped tube 20. The one-way valves 23 at both ends of the U-shaped tube 20 prevent the gas from flowing in the opposite direction, thus preventing the gas backflow caused by the airflow convection at both ends of the U-shaped tube 20. When the gas flows along the U-shaped tube 20 to between the two one-way valves 23, it re-enters the hopper 11 through the tangential diversion pipe 22. This causes some of the gas to be diverted and re-enter the hopper 11 from both sides. The inclined setting of the tangential diversion pipe 22 changes the direction of the gas diversion, so that the diverted airflows on both sides enter the hopper 11 and form a rotating flow field after tangential convection with the main airflow. This improves the suspension stability of the dry powder during conveying and enhances the pneumatic conveying effect of the dry powder.

[0025] As a further embodiment of the present invention, a set of sliding frames 24 are slidably connected between two adjacent partitions 8. There are two sliding frames 24 in each set. Multiple parallel shearing steel ropes 25 are fixedly connected inside each sliding frame 24. The shearing steel ropes 25 inside the two sliding frames 24 in the same set form an angle with each other. A shearing assembly is provided on the U-shaped frame 5. The shearing assembly is used to drive the sliding frame 24 to move back and forth. As the dry powder falls between two adjacent partitions 8 and moves upward along the annular cavity formed by the limiting collar 2 and the storage cylinder 3, the two sliding frames 24 in the same group are covered inside the dry powder. When the dry powder between the two adjacent partitions 8 is connected to the hopper 11 by rotation, the two sliding frames 24 in the same group are driven to move back and forth by the action of the shearing component. During the movement, the shearing steel ropes 25 inside the two sliding frames 24 form an angle with each other and continuously shear the dry powder between the two partitions 8, thereby driving the dry powder to move, increasing the looseness of the dry powder, preventing the dry powder from being squeezed and compacted between the limiting collar 2 and the storage cylinder 3, and breaking up the agglomerated dry powder by the shearing of the moving shearing steel ropes 25, reducing the impact of dry powder agglomeration on the conveying and feeding.

[0026] As a further embodiment of the present invention, the shearing component includes: Two guide rings 26 (e.g.) Figure 2 As shown), two guide rings 26 are respectively disposed at both ends of the limiting collar 2 and are coaxially disposed with the limiting collar 2. The guide rings 26 are fixedly connected to the U-shaped frame 5. The guide ring 26 includes a parallel section 2601 and a wave section 2602. The wave section 2602 is located above the parallel section 2601. The ends of the two sliding frames 24 in the same group that are far apart from each other are fixedly connected to connecting strips 27 (such as...). Figure 7 As shown), one end of the connecting strip 27 passes through the corresponding movable ring 7 and is rotatably connected to two limiting rollers 28. The two adjacent limiting rollers 28 are located on both sides of the guide ring 26. When the two movable rings 7 drive the multiple partitions 8 to rotate, the sliding frame 24 rotates synchronously with the movable rings 7. The two limiting rollers 28 on the connecting strip 27 rotate and fit against the two sides of the guide ring 26 and move synchronously. When the two limiting rollers 28 on the connecting strip 27 move on the parallel section 2601, the position of the sliding frame 24 between the two adjacent partitions 8 remains unchanged. When the sliding frame 24 rotates and connects with the hopper 11, the two limiting rollers 28 on the connecting strip 27 move from the parallel section 2601 to the wave section 2602 and move along the trajectory of the wave section 2602, so that the sliding frame 24 moves back and forth between the two adjacent partitions 8 and loosens and crushes the dry powder between the two partitions 8.

[0027] As a further embodiment of the present invention, the driving component includes: The connecting shaft 29 is rotatably connected to the shaft center of the storage cylinder 3. Both ends of the connecting shaft 29 are fixedly connected to the drive gear 30. Both movable rings 7 are fixedly connected to the internal gear ring 31. Both ends of the storage cylinder 3 are rotatably connected to the mating gear 32. The mating gear 32 rotatably meshes between the corresponding drive gear 30 and the internal gear ring 31. Motor 33 is fixedly mounted on U-shaped frame 5. One end of the output shaft and one end of the connecting shaft 29 of motor 33 are fixedly connected to transmission wheel 34. A transmission belt 35 is connected between the two transmission wheels 34. The output shaft of motor 33 drives the corresponding transmission wheel 34 to rotate, and through the transmission belt 35, drives the transmission wheel 34 at one end of connecting shaft 29 to rotate, thereby causing connecting shaft 29 to rotate. The two drive gears 30 on connecting shaft 29 rotate synchronously with connecting shaft 29, and through meshing, drive the two mating gears 32 to rotate. Through the meshing between mating gears 32 and internal gear ring 31, the internal gear ring 31 is driven to rotate, causing the two movable rings 7 to rotate synchronously, and driving the partition 8 between the two movable rings 7 to move along the annular cavity between storage cylinder 3 and limiting sleeve 2.

[0028] As a further embodiment of the present invention, a fixed frame 36 is provided at both ends inside the storage cylinder 3. The two fixed frames 36 are fixedly connected to the connecting shaft 29. A plurality of scraper strips 37 are fixedly connected between the two fixed frames 36 along the circumferential direction. The scraper strips 37 slide and fit against the inner arc surface of the storage cylinder 3. When the connecting shaft 29 rotates, it drives the two fixed frames 36 to rotate synchronously, thereby causing multiple scraper strips 37 to move along the inner arc surface of the storage cylinder 3 and scrape the dry powder on the inner wall of the storage cylinder 3, thereby reducing the adhesion of dry powder inside the storage cylinder 3. Furthermore, by scraping the dry powder with the scraper strips 37, the efficiency of the dry powder falling along the discharge chute 4 is improved.

[0029] As a further embodiment of the present invention, a guide slope is provided on the side of each of the multiple scraper strips 37 near the moving direction; When the scraper bar 37 comes into contact with the dry powder, the guide slope on one side of the scraper bar 37 can reduce the resistance during the movement, so that the scraper bar 37 can pass smoothly between the dry powder and the inner wall of the storage cylinder 3.

[0030] As a further embodiment of the present invention, flanges 38 are fixedly connected to both ends of the feed pipe 10, the conveying pipe 12, and the conveying blower 9 (e.g., Figure 1 As shown), two adjacent flanges 38 are fixed together by bolts; The two adjacent flanges 38 are fixed by bolts, which facilitates the disassembly of the feed pipe 10 and the conveying pipe 12, and is beneficial for cleaning the feed pipe 10 and the conveying pipe 12 as well as for the inspection and maintenance of the conveying fan 9.

[0031] Working principle of this invention: When conveying and feeding polymer dry powder, the conveying blower 9 is started, generating negative pressure at its negative pressure end. This causes the feed pipe 10 to be negatively pressure-adsorbed, and the dry powder is conveyed along the feed pipe 10 into the conveying blower 9. Then, it is conveyed and fed along the conveying pipe 12 under positive pressure. When the conveying blower 9 is working, the two movable rings 7 are driven to rotate synchronously by the drive component. This causes multiple baffles 8 to fit and rotate in the annular cavity between the storage cylinder 3 and the limiting sleeve 2. The dry powder stored inside the storage cylinder 3 falls along the bottom under the action of gravity. The material trough 4 falls and, as the partition 8 rotates, drops between two adjacent partitions 8. The rotation of the partition 8 transfers the dry powder upward along the annular cavity between the storage cylinder 3 and the limiting collar 2. When the two adjacent partitions 8 rotate to the top of the annular cavity and connect with the hopper 11, the hopper 11 uses the negative pressure generated by the conveying blower 9 to adsorb the dry powder between the two adjacent partitions 8 and enter the feed pipe 10 along the hopper 11. Then, the dry powder is conveyed into the feeding pipe 6 by the conveying blower 9, thereby conveying and feeding the dry powder. When the hopper 11 generates negative pressure through the action of the conveying fan 9, the air intake component delivers gas into the hopper 11, so that the hopper 11 can provide the gas required for negative pressure flow when the dry powder is adsorbed by negative pressure. When the dry powder stored in the storage cylinder 3 is used up, it is replenished through the feeding pipe 6.

[0032] 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 principles of 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 claims. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A polymer dry powder pneumatically driven dry powder conveying and feeding device, comprising a base plate, characterized in that, Also includes: The limiting collar is fixedly connected to the base plate; The storage cylinder is set inside the limiting collar and is coaxial with the limiting collar. A material drop groove is opened at the bottom of the storage cylinder. A U-shaped frame is fixedly connected to the bottom plate. The two ends of the U-shaped frame are fixedly connected to the two ends of the storage cylinder. A feeding pipe is fixedly connected to one end of the storage cylinder. Two movable rings are respectively set at both ends between the storage cylinder and the limiting sleeve. The movable rings are slidably connected to the U-shaped frame and are coaxially set with the limiting sleeve. Multiple partitions are fixedly connected between the two movable rings along the circumferential direction. The partitions are slidably attached to the storage cylinder and the limiting sleeve. The material conveying blower is fixedly installed on the base plate. The negative pressure end of the material conveying blower is fixedly connected to the feed pipe. One end of the feed pipe is fixedly connected to the hopper. The hopper is fixedly connected to the top of the limiting collar. The positive pressure end of the material conveying blower is fixedly connected to the material conveying pipe. The drive assembly is mounted on the U-shaped frame and is used to drive the two movable rings to rotate synchronously. The air intake assembly is located on the hopper and is used to provide the gas required for negative pressure flow.

2. The polymer dry powder pneumatically driven dry powder conveying and feeding device according to claim 1, characterized in that, The intake components include: Two circular holes are located at both ends of the hopper; A single-pass pipe is installed on one side of the hopper. Two air inlet pipes are fixedly connected to the sealed end of the single-pass pipe. One end of each air inlet pipe is fixedly connected to two circular holes. A pressure sensor is fixedly installed at the end of the feed pipe closest to the hopper. The detection end of the pressure sensor is located inside the feed pipe.

3. The polymer dry powder pneumatically driven dry powder conveying and feeding device according to claim 2, characterized in that, Each circular hole has a mounting bracket fixedly connected inside. A rotating shaft is rotatably connected to the center of the mounting bracket, and a fan blade is fixedly installed at one end of the rotating shaft.

4. The polymer dry powder pneumatically driven dry powder conveying and feeding device according to claim 2, characterized in that, Both sides of the hopper are equipped with U-shaped tubes. Both ends of the U-shaped tubes penetrate the hopper and extend into the hopper, where they are fixedly connected to a circular shell. The open end of the circular shell is fixedly connected to the inner wall of the hopper and communicates with the corresponding circular hole. Multiple tangential diversion tubes are fixedly connected to the U-shaped tubes on the outer surface of the hopper. One end of each tangential diversion tube penetrates the corresponding side of the hopper and extends into the hopper. One-way valves are fixedly installed at both ends of the U-shaped tubes.

5. A polymer dry powder pneumatically driven dry powder conveying and feeding device according to claim 1, characterized in that, A set of sliding frames is slidably connected between each pair of adjacent partitions. There are two sliding frames in each set. Multiple parallel shearing steel ropes are fixedly connected inside each sliding frame. The shearing steel ropes inside the two sliding frames in the same set form an angle with each other. A shearing assembly is set on the U-shaped frame. The shearing assembly is used to drive the sliding frame to move back and forth.

6. A polymer dry powder pneumatically driven dry powder conveying and feeding device according to claim 5, characterized in that, The cutting component includes: Two guide rings are respectively set at both ends of the limiting sleeve and are coaxially arranged with the limiting sleeve. The guide rings are fixedly connected to the U-shaped frame. The guide rings include a parallel section and a wave section. The wave section is located above the parallel section. Two sliding frames in the same group are fixedly connected to each other at their far ends. One end of each connecting strip passes through the corresponding movable ring and is rotatably connected to two limiting rollers. The two adjacent limiting rollers are located on both sides of the guide ring.

7. A polymer dry powder pneumatically driven dry powder conveying and feeding device according to claim 1, characterized in that, The driver components include: The connecting shaft is rotatably connected to the center of the storage cylinder. Both ends of the connecting shaft are fixedly connected to the drive gear, and both movable rings are fixedly connected to the internal gear ring. Both ends of the storage cylinder are rotatably connected to the mating gear, which meshes with the corresponding drive gear and internal gear ring. The motor is fixedly mounted on a U-shaped frame. One end of the motor's output shaft and connecting shaft are fixedly connected to a drive wheel, and a drive belt connects the two drive wheels.

8. A polymer dry powder pneumatically driven dry powder conveying and feeding device according to claim 7, characterized in that, Both ends of the storage cylinder are equipped with fixed frames, which are fixedly connected to the connecting shaft. Multiple scraper strips are fixedly connected circumferentially between the two fixed frames, and the scraper strips slide against the inner arc surface of the storage cylinder.

9. A polymer dry powder pneumatically driven dry powder conveying and feeding device according to claim 8, characterized in that, Multiple scraper strips have guide slopes on the side closest to the direction of movement.

10. A polymer dry powder pneumatically driven dry powder conveying and feeding device according to claim 1, characterized in that, Flanges are fixedly connected to both ends of the feed pipe, conveying pipe, and conveying blower, and adjacent flanges are fixed together by bolts.

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