Powder conveying device and using method thereof

Abstract

The invention discloses a powder conveying device and a using method thereof.The powder conveying device comprises a supporting underframe and has the beneficial effects that a feeding port, a crushing roller, a first screening net plate, a second screening net plate, a spiral blade conveying shaft and a multi-point dust removal system are highly integrated; materials can be sequentially subjected to crushing pretreatment, multi-stage screening and closed conveying in the same equipment, meanwhile, dust removal points are arranged at key positions of a feeding port and a discharging port, productive dust is effectively collected, the working efficiency is remarkably improved, the working environment is greatly improved, and dust pollution and material loss are reduced; when a single motor drives a crushing roller to perform crushing operation, an eccentric wheel is driven to rotate through meshing of a first gear and a second gear, so that power is transmitted to a screening mechanism, a first screening net plate generates reciprocating vibration, use of an independent driving source is reduced due to the power linkage design, the structure is more compact, and the screening efficiency is improved. And the equipment complexity and the manufacturing cost are reduced.

Description

Technical Field

[0001] This invention relates to the field of powder conveying technology, specifically to a powder conveying device and its usage method. Background Technology

[0002] Powder materials, such as cement, lime, mineral powder, plastic granules, chemical raw materials, and food additives, are essential basic materials in industrial production. From storage and processing to final use, they typically undergo multiple processes including screening, crushing, and conveying. Efficiently, environmentally friendly, and automatedly completing these processes is crucial for ensuring production continuity, improving product quality, reducing labor intensity, protecting the working environment, and minimizing material loss. Currently, the pretreatment, screening, and conveying of powder materials are often handled in separate stages using independent equipment, typically requiring… First, the agglomerated material is crushed by a crusher, then the particle size is classified by an independent vibrating screen, and finally the qualified powder is transported to the next stage by a screw conveyor, bucket elevator or pneumatic conveying system. The multiple equipment is scattered, which not only occupies a large area, but also poses risks of leakage, dust and secondary pollution during the transfer of materials between equipment. It also increases the possibility of material residue and cross-contamination. Powder materials are prone to generating dust in multiple stages such as feeding, crushing, screening, conveying and discharging. Existing decentralized processing technology is difficult to systematically and comprehensively control dust throughout the entire process. Summary of the Invention

[0003] The purpose of this invention is to provide a powder conveying device and its usage method to solve the problems mentioned in the background art, which are that multiple devices are arranged in a dispersed manner, which not only occupy a large area, but also pose risks of leakage, dust and secondary pollution during the transfer of materials between devices, and increase the possibility of material residue and cross-contamination. Powder materials are prone to generating dust in multiple stages such as feeding, crushing, screening, conveying and discharging, and existing decentralized processing technology is difficult to systematically and comprehensively control dust throughout the entire process.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a powder conveying device, comprising a supporting base frame, a top support frame fixedly mounted on the top of the supporting base frame by bolts, a screen branch box fixedly mounted on the top of the top support frame by bolts, a feed hopper fixedly connected to the top of the screen branch box, a top support frame fixedly connected to the top of the feed hopper, a plurality of first-order dust suction heads fixedly fixedly at equal intervals on the inner side of the top support frame, two crushing rollers rotatably arranged on the inner side of the screen branch box, a first-order gear fixedly connected to the outer side of each of the two crushing rollers, the two first-order gears meshing with each other, a side fixing box fixedly mounted on one side of the screen branch box by bolts, the crushing rollers rotatably connected to the side fixing box, and the side fixing box... The internal rotating part is equipped with a rotating rod, and a second gear is fixedly connected to the outer side of the rotating rod. One of the first gears meshes with the second gear. An eccentric wheel is fixedly connected to the outer side of the second gear. A first screening screen plate is slidably arranged inside the screening branch box. The eccentric wheel cooperates with the first screening screen plate. The first screening screen plate is slidably connected to the side fixed box. A bottom connecting frame is fixedly connected to the bottom of the first screening screen plate. A second screening screen plate is fixedly connected to the bottom of the bottom connecting frame. The second screening screen plate is slidably connected to the screening branch box. A discharge hopper is fixedly installed at the bottom of the screening branch box by bolts. A conveying support box is fixedly connected to the bottom of the discharge hopper. A spiral blade conveying shaft is rotatably arranged inside the conveying support box.

[0005] As a preferred embodiment of the present invention: a discharge pipe is fixedly connected to the bottom of the spiral blade conveying shaft, a discharge head is fixedly connected to the bottom of the discharge pipe, a discharge cover is fixedly installed at the bottom of the discharge head by bolts, a second annular dust collection box is fixedly connected to the bottom of the discharge cover, a plurality of second dust collection heads are equidistantly arranged at the bottom of the second annular dust collection box, and a dust discharge pipe is provided on one side of the second annular dust collection box.

[0006] As a preferred embodiment of the present invention: a first annular dust collection box is fixedly connected to the outer side of the top support frame, and multiple first dust collection heads are connected to the first annular dust collection box through pipes, and a dust collection pipe is fixedly connected to one side of the first annular dust collection box.

[0007] As a preferred embodiment of the present invention: a dust extraction fan is bolted to the top of the support base, and a maintenance box is bolted to the top of the support base. The input end of the dust extraction fan is connected to the maintenance box via an air duct. A side dust extraction box is fixedly connected to one side of the maintenance box. A dust collection mesh bag is threadedly installed on one side of the side dust extraction box. A sealed maintenance door is provided on one side of the side dust extraction box. Multiple dust collection pipes are provided on one side of the side dust extraction box. An air outlet pipe is fixedly connected to the output end of the dust extraction fan.

[0008] As a preferred embodiment of the present invention: a first discharge box that cooperates with a first screening screen plate is fixedly connected to one side of the screening branch box, and a first discharge pipe is provided at the bottom of the first discharge box; a second discharge box that cooperates with a second screening screen plate is fixedly connected to the other side of the screening branch box, and a second discharge pipe is provided on one side of the second discharge box.

[0009] As a preferred embodiment of the present invention: a fixed bracket is fixedly installed on one side of the screening box by bolts, and a motor is fixedly installed on the top of the fixed bracket by bolts, and one end of one of the crushing rollers is fixedly connected to the output end of the motor.

[0010] As a preferred embodiment of the present invention: a plurality of spring dampers are symmetrically installed at the bottom of the No. 1 screening screen plate, and the bottom of the spring dampers is connected to the screening box by bolts.

[0011] As a preferred embodiment of the present invention: a top fixing frame is fixedly installed on the top of the supporting base frame by bolts, the conveying support box is fixedly installed with the top fixing frame by bolts, a motor is fixedly installed on the inner side of the top fixing frame by bolts, and the output end of the motor is fixedly connected to the spiral blade conveying shaft.

[0012] As a preferred embodiment of the present invention, a storage battery is provided on the top of the support frame.

[0013] A method of using a powder conveying device includes the following steps: S1. Powder material is first added from the top feed hopper. Before entering the device, the material flows through the top support frame area. Multiple No. 1 dust suction heads installed in the frame are activated to suck the floating dust, light and easily dusty fine powder mixed in the material into the No. 1 annular dust suction box through the pipe, and then enter the subsequent dust removal system through the dust suction pipe to achieve the initial dust removal at the feed inlet and reduce the escape of dust. S2. After the material falls into the screening box, a crushing roller is driven by a motor to rotate. Through two meshing No. 1 gears, the two crushing rollers rotate relative to each other, squeezing and crushing agglomerated or large particles, making them easier to screen and convey. One of the No. 1 gears drives the No. 2 gear and its fixed eccentric wheel to rotate. The rotation of the eccentric wheel periodically impacts or pushes the No. 1 screening screen plate, causing it to slide back and forth within the screening box. The No. 1 screening screen plate is buffered and reset by a spring damper at the bottom, forming a highly efficient vibrating screening mechanism. The vibration of the No. 1 screening screen plate drives the bottom connecting frame and the No. 2 screening screen plate, which are fixed to it, to move together. S3. The material is first screened on the No. 1 screening screen. The material that meets the first-stage particle size requirement (fine powder) falls through the screen holes, while the material that does not meet the requirement (larger particles) is screened out and discharged through the No. 1 discharge box and the No. 1 discharge pipe. The material that has passed through the first-stage screening falls onto the No. 2 screening screen for further secondary screening. The finer material falls through its screen holes, while the medium-sized material is screened out and discharged through the No. 2 discharge box and the No. 2 discharge pipe, thus achieving the grading of the material. S4. The qualified powder after secondary screening falls into the discharge hopper and enters the conveyor support box. The motor drives the spiral blade conveyor shaft to rotate, propelling the powder forward. The powder is conveyed to the discharge hood through the discharge pipe and discharge head for unloading. At the unloading point, the No. 2 annular dust collection box and its multiple No. 2 dust collection heads installed at the bottom of the discharge hood are activated to capture the dust generated during unloading. The dust is then connected to the dust removal system through the dust discharge pipe on its side to achieve dust control at the discharge port. S5. The dust removal operation of the entire device is powered by a vacuum fan. The vacuum fan draws air from the maintenance box and the side dust collection box through the air duct, generating negative pressure. The dust-laden airflow collected by the first and second vacuum heads is collected in the side dust collection box through the vacuum pipe and corresponding pipes. The dust is filtered and collected by the dust collection net bag, and the purified air is discharged through the exhaust pipe of the vacuum fan. The dust collection pipe can be used to connect other possible dust points of the equipment. During cleaning, the sealed maintenance door can be opened to replace or clean the dust collection net bag. The entire device is mainly supported by the support base frame and the top support frame. The top fixed frame provides reinforcement for the conveying part. The motor and the power source of the motor can be provided by the battery installed in the device or an external power source. The various components are mainly fixed by bolts, which facilitates installation and maintenance.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The device of the present invention highly integrates the feed inlet, crushing roller, first and second screening screens, spiral blade conveying shaft, and multi-point dust removal system. Materials can undergo crushing pretreatment, multi-stage screening, and enclosed conveying sequentially within the same equipment. Simultaneously, dust removal points are set at key locations at the feed and discharge inlets to effectively collect production dust, significantly improving operating efficiency and greatly improving the working environment, reducing dust pollution and material loss. While a single motor drives the crushing roller for crushing operations, it also drives the eccentric wheel to rotate through the meshing of the first and second gears. This transmits power to the screening mechanism, causing the No. 1 screening screen plate to reciprocate. The power linkage design reduces the use of independent drive sources, making the structure more compact, reducing equipment complexity and manufacturing costs, while ensuring the synchronous and coordinated operation of the crushing and screening processes. The spring damper at the bottom of the screening screen plate further ensures the stability of the vibration process. The dust collection screen bags of the dust removal system are threaded and equipped with sealed maintenance doors, allowing for quick and convenient cleaning, replacement, or maintenance of the filter unit without disassembling the main body of the equipment. This greatly reduces maintenance difficulty and time costs, ensuring the continuous and efficient operation of the equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 For the present invention Figure 2 Enlarged view at point B in the middle; Figure 5 For the present invention Figure 2 Enlarged view at point C; Figure 6 This is a top view of the internal structure of the present invention; Figure 7 This is a schematic diagram of the internal structure of the top support frame of the present invention.

[0016] In the diagram: 1. Support base frame; 2. Top support frame; 3. Fixed bracket; 4. Screening branch box; 5. Motor; 6. Feed hopper; 7. Top support frame; 8. No. 1 dust suction head; 9. No. 1 annular dust suction box; 10. Dust suction pipe; 11. Discharge hopper; 12. Conveyor support box; 13. Spiral blade conveyor shaft; 14. Discharge pipe; 15. Discharge head; 16. Battery; 17. Air outlet pipe; 18. Dust collection mesh bag; 19. Discharge hood; 20. No. 2 annular dust suction box; 21. No. 2 dust suction head 22. Top fixing frame; 23. Motor; 24. Crushing roller; 25. Gear No. 1; 26. Side fixing box; 27. Gear No. 2; 28. Rotating rod; 29. ​​Eccentric wheel; 30. Screening screen No. 1; 31. Discharge box No. 1; 32. Discharge pipe No. 1; 33. Spring damper; 34. Bottom connecting frame; 35. Screening screen No. 2; 36. Discharge box No. 2; 37. Discharge pipe No. 2; 38. Dust extraction fan; 39. Maintenance box; 40. Side dust extraction box; 41. Dust collection pipe. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1 to 7This invention provides a technical solution: a powder conveying device, including a supporting base frame 1, a top support frame 2 fixedly installed on the top of the supporting base frame 1 by bolts, a screen branch box 4 fixedly installed on the top of the top support frame 2 by bolts, a feed hopper 6 fixedly connected to the top of the screen branch box 4, a top support frame 7 fixedly connected to the top of the feed hopper 6, a plurality of first-order dust suction heads 8 fixedly connected at equal intervals on the inner side of the top support frame 7, two crushing rollers 24 rotatably arranged on the inner side of the screen branch box 4, and a first-order gear 25 fixedly connected to the outer side of each of the two crushing rollers 24, the two first-order gears 25 meshing with each other, a side fixing box 26 fixedly installed on one side of the screen branch box 4 by bolts, the crushing rollers 24 rotatably connected to the side fixing box 26, and a rotating rod 2 rotatably arranged inside the side fixing box 26. 8. A second gear 27 is fixedly connected to the outer side of the rotating rod 28. One of the first gears 25 meshes with the second gear 27. An eccentric wheel 29 is fixedly connected to the outer side of the second gear 27. A first screening screen plate 30 is slidably arranged inside the screening branch box 4. The eccentric wheel 29 cooperates with the first screening screen plate 30. The first screening screen plate 30 is slidably connected to the side fixed box 26. A bottom connecting frame 34 is fixedly connected to the bottom of the first screening screen plate 30. A second screening screen plate 35 is fixedly connected to the bottom of the bottom connecting frame 34. The second screening screen plate 35 is slidably connected to the screening branch box 4. A discharge hopper 11 is fixedly installed at the bottom of the screening branch box 4 by bolts. A conveying support box 12 is fixedly connected to the bottom of the discharge hopper 11. A spiral blade conveying shaft 13 is rotatably arranged inside the conveying support box 12.

[0019] Among them, the bottom of the spiral blade conveying shaft 13 is fixedly connected to the discharge pipe 14, the bottom of the discharge pipe 14 is fixedly connected to the discharge head 15, the bottom of the discharge head 15 is fixedly installed with the discharge cover 19 by bolts, the bottom of the discharge cover 19 is fixedly connected to the second annular dust collection box 20, the bottom of the second annular dust collection box 20 is equidistantly arranged with multiple second dust collection heads 21, and a dust discharge pipe is provided on one side of the second annular dust collection box 20. At the discharge end of the screw conveyor, by setting up a discharge hood 19 and an integrated second annular dust collection box 20 and multiple second dust collection heads 21, the dust generated during material discharge can be efficiently captured at the final discharge point, achieving effective control of end dust, avoiding secondary pollution, and improving the cleanliness of the discharge operation.

[0020] Among them, a first ring-shaped dust collection box 9 is fixedly connected to the outer side of the top support frame 7, and multiple first dust collection heads 8 are connected to the first ring-shaped dust collection box 9 through pipes. A dust collection pipe 10 is fixedly connected to one side of the first ring-shaped dust collection box 9. A top support frame 7 and an integrated first annular dust collection box 9 and multiple first dust collection heads 8 are set at the inlet of the feed hopper 6, which constitutes a front-end dust collection system. This system can control the dust generated when the material falls, effectively prevent dust from escaping during the feeding process, and improve the initial working environment.

[0021] The top of the support frame 1 is bolted with a dust extraction fan 38 and a maintenance box 39. The input end of the dust extraction fan 38 is connected to the maintenance box 39 via a duct. A side dust extraction box 40 is fixedly connected to one side of the maintenance box 39. A dust collection net bag 18 is threadedly installed on one side of the side dust extraction box 40. A sealed maintenance door is provided on one side of the side dust extraction box 40. Multiple dust collection pipes 41 are provided on one side of the side dust extraction box 40. An air outlet pipe 17 is fixedly connected to the output end of the dust extraction fan 38. It provides a centralized dust removal power and collection solution. The vacuum fan 38 provides negative pressure, and the side dust collection box 40 centrally handles the dust from various sources. The threaded dust collection bag 18 and the sealed maintenance door greatly facilitate the collection, filtration and cleaning of dust, and reduce the dust removal and maintenance costs during long-term operation.

[0022] Among them, a first discharge box 31 that cooperates with the first screening screen plate 30 is fixedly connected to one side of the screening branch box 4, and a first discharge pipe 32 is provided at the bottom of the first discharge box 31. A second discharge box 36 that cooperates with the second screening screen plate 35 is fixedly connected to the other side of the screening branch box 4, and a second discharge pipe 37 is provided on one side of the second discharge box 36. By setting up discharge boxes 31 and 36 corresponding to the first screening screen 30 and the second screening screen 35, respectively, as well as their respective discharge pipes 32 and 37, the orderly, directional, and smooth discharge of materials on the screen of different particle sizes is achieved, which facilitates classification, collection, or subsequent processing and improves the orderliness and practicality of the screening function.

[0023] Among them, a fixed bracket 3 is fixedly installed on one side of the screening box 4 by bolts, and a motor 5 is fixedly installed on the top of the fixed bracket 3 by bolts. One end of one of the crushing rollers 24 is fixedly connected to the output end of the motor 5. The specific installation structure of the drive device was clarified. The motor 5 was stably installed by the fixed bracket 3, so that its output end directly drives the crushing roller 24, ensuring the reliability, efficiency and stability of the core power transmission of the crushing device. The structure is compact and the installation is firm.

[0024] Among them, multiple spring dampers 33 are symmetrically installed at the bottom of the No. 1 screening screen plate 30, and the bottom of the spring damper 33 is installed with the screening branch box 4 by bolts. Multiple spring dampers 33 are symmetrically installed at the bottom of the No. 1 screening screen plate 30, which can effectively buffer and absorb the impact energy transmitted by the eccentric wheel 29, making the reciprocating motion of the screening screen plate smoother and more elastic, reducing rigid impact and noise, improving screening efficiency and equipment operation stability, and extending the service life of components.

[0025] Among them, the top of the support base frame 1 is fixedly installed with a top fixing frame 22 by bolts, the conveying support box 12 is fixedly installed with the top fixing frame 22 by bolts, and the inner side of the top fixing frame 22 is fixedly installed with a motor 23 by bolts. The output end of the motor 23 is fixedly connected to the spiral blade conveying shaft 13. The top fixing frame 22 provides stable support for the conveying support box 12 and the spiral blade conveying shaft 13 inside, and is driven by an independent motor 23, which realizes the stable, efficient and independent operation of the conveying module, ensuring the continuity and controllability of powder conveying, and the structure is stable and reliable.

[0026] A battery 16 is installed on the top of the supporting base frame 1; A battery 16 is installed on the support frame 1 to provide a backup or independent power source for the equipment, which enhances the equipment's mobility and allows it to work for short periods in places without a fixed power source or in the event of a temporary power outage, thereby improving the equipment's deployment flexibility and adaptability to different working conditions.

[0027] A method of using a powder conveying device includes the following steps: S1. Powder material is first added from the top feed hopper 6. Before entering the device, the material flows through the top support frame 7 area. Multiple first dust suction heads 8 installed in the frame are activated to suck the floating dust, light and easily dusty fine powder mixed in the material into the first annular dust suction box 9 through the pipe, and then enter the subsequent dust removal system through the dust suction pipe 10 to achieve the initial dust removal at the feed inlet and reduce the escape of dust. S2. After the material falls into the screening box 4, a crushing roller 24 is driven to rotate by a motor 5. Through two meshing gears 25, the two crushing rollers 24 rotate relative to each other, squeezing and crushing agglomerated or large particles, making them easier to screen and convey. One of the gears 25 drives the second gear 27 and the eccentric wheel 29 fixed on it to rotate. The rotation of the eccentric wheel 29 will periodically hit or push the first screening screen plate 30, causing it to slide back and forth in the screening box 4. The first screening screen plate 30 is buffered and reset by the spring damper 33 at the bottom, forming a highly efficient vibrating screening mechanism. The vibration of the first screening screen plate 30 drives the bottom connecting frame 34 and the second screening screen plate 35 fixed to it to move together. S3. The material is first screened on the first screening screen plate 30. Fine powder that meets the first-stage particle size requirements falls through the screen holes, while larger particles that do not meet the requirements are screened out and discharged through the first discharge box 31 and the first discharge pipe 32. The material that has passed the first screening falls on the second screening screen plate 35 for further second-stage screening. Finer materials fall through its screen holes, while medium-sized particles are screened out and discharged through the second discharge box 36 and the second discharge pipe 37, thus achieving the grading of the material. S4. The qualified powder after secondary screening falls into the discharge hopper 11 and enters the conveying support box 12. The motor 23 drives the spiral blade conveying shaft 13 to rotate, propelling the powder forward. The powder is conveyed to the discharge hood 19 through the discharge pipe 14 and the discharge head 15 for unloading. At the unloading point, the second annular dust collection box 20 installed at the bottom of the discharge hood 19 and its multiple second dust collection heads 21 are activated to capture the dust generated during unloading. The dust is then connected to the dust removal system through the dust discharge pipe on its side to achieve dust control at the discharge port. S5. The dust removal operation of the entire device is powered by the vacuum fan 38. The vacuum fan 38 draws air from the maintenance box 39 and the side vacuum box 40 through the air duct, generating negative pressure. The dust-laden airflow collected by the first vacuum head 8 and the second vacuum head 21 is gathered into the side vacuum box 40 through the vacuum pipe 10 and the corresponding pipes. The dust is filtered and collected by the dust collection net bag 18. The purified air is discharged through the exhaust pipe 17 of the vacuum fan 38. The dust collection pipe 41 can be used to connect other possible dust points of the equipment. During cleaning, the sealed maintenance door can be opened to replace or clean the dust collection net bag 18. The entire device is mainly supported by the support base frame 1 and the top support frame 2. The top fixed frame 22 provides reinforcement for the conveying part. The power source for the motor 5 and the motor 23 can be provided by the battery 16 installed inside the device or an external power source. The components are mainly fixed by bolts, which facilitates installation and maintenance.

[0028] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0029] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0030] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A powder conveying device, comprising a supporting base frame (1), characterized in that, A top support frame (2) is bolted to the top of the support base (1). A screen branch box (4) is bolted to the top of the top support frame (2). A feed hopper (6) is fixed to the top of the screen branch box (4). A top support frame (7) is fixed to the top of the feed hopper (6). Multiple first-order dust collection heads (8) are equidistantly fixed to the inner side of the top support frame (7). Two crushing rollers (24) are rotatably arranged on the inner side of the screen branch box (4). A first-order gear (25) is fixed to the outer side of each of the two crushing rollers (24). The two first-order gears (25) are meshed together. A side fixing box (26) is bolted to one side of the screen branch box (4). The crushing rollers (24) are rotatably connected to the side fixing box (26). A rotating rod (28) is rotatably arranged inside the side fixing box (26). A second-order dust collection head (8) is fixed to the outer side of the rotating rod (28). Gear (27), one of the first gears (25) meshes with the second gear (27), an eccentric wheel (29) is fixedly connected to the outer side of the second gear (27), a first screening screen plate (30) is slidably arranged inside the screening branch box (4), the eccentric wheel (29) cooperates with the first screening screen plate (30), the first screening screen plate (30) is slidably connected to the side fixed box (26), a bottom connecting frame (34) is fixedly connected to the bottom of the first screening screen plate (30), a second screening screen plate (35) is fixedly connected to the bottom of the bottom connecting frame (34), the second screening screen plate (35) is slidably connected to the screening branch box (4), a discharge hopper (11) is fixedly installed at the bottom of the screening branch box (4) by bolts, a conveying support box (12) is fixedly connected to the bottom of the discharge hopper (11), and a spiral blade conveying shaft (13) is rotatably arranged inside the conveying support box (12).

2. The powder conveying device according to claim 1, characterized in that: The bottom of the spiral blade conveying shaft (13) is fixedly connected to a discharge pipe (14), the bottom of the discharge pipe (14) is fixedly connected to a discharge head (15), the bottom of the discharge head (15) is fixedly installed with a discharge cover (19) by bolts, the bottom of the discharge cover (19) is fixedly connected to a second annular dust collection box (20), the bottom of the second annular dust collection box (20) is equidistantly provided with multiple second dust collection heads (21), and a dust discharge pipe is provided on one side of the second annular dust collection box (20).

3. The powder conveying device according to claim 2, characterized in that: A first annular dust collection box (9) is fixedly connected to the outside of the top support frame (7). Multiple first dust collection heads (8) are connected to the first annular dust collection box (9) through pipes. A dust collection pipe (10) is fixedly connected to one side of the first annular dust collection box (9).

4. A powder conveying device according to claim 3, characterized in that: A vacuum cleaner fan (38) is bolted to the top of the support base (1), and a maintenance box (39) is bolted to the top of the support base (1). The input end of the vacuum cleaner fan (38) is connected to the maintenance box (39) via a duct. A side dust collection box (40) is fixed to one side of the maintenance box (39). A dust collection net bag (18) is threaded onto one side of the side dust collection box (40). A sealed maintenance door is provided on one side of the side dust collection box (40). Multiple dust collection pipes (41) are provided on one side of the side dust collection box (40). An air outlet pipe (17) is fixed to the output end of the vacuum cleaner fan (38).

5. A powder conveying device according to claim 4, characterized in that: One side of the screening branch box (4) is fixedly connected to a first discharge box (31) that cooperates with the first screening screen plate (30). The bottom of the first discharge box (31) is provided with a first discharge pipe (32). The other side of the screening branch box (4) is fixedly connected to a second discharge box (36) that cooperates with the second screening screen plate (35). The second discharge box (36) is provided with a second discharge pipe (37) on one side.

6. A powder conveying device according to claim 5, characterized in that: A fixed bracket (3) is fixedly installed on one side of the screening box (4) by bolts, and a motor (5) is fixedly installed on the top of the fixed bracket (3) by bolts. One end of one of the crushing rollers (24) is fixedly connected to the output end of the motor (5).

7. A powder conveying device according to claim 6, characterized in that: Multiple spring dampers (33) are symmetrically installed at the bottom of the No. 1 screening screen plate (30), and the bottom of the spring dampers (33) is installed with the screening box (4) by bolts.

8. A powder conveying device according to claim 7, characterized in that: The top of the support base (1) is fixedly installed with a top fixing frame (22) by bolts. The conveying support box (12) is fixedly installed with the top fixing frame (22) by bolts. The inner side of the top fixing frame (22) is fixedly installed with a motor (23) by bolts. The output end of the motor (23) is fixedly connected to the spiral blade conveying shaft (13).

9. A powder conveying device according to claim 8, characterized in that: A battery (16) is provided on the top of the support frame (1).

10. A method of using a powder conveying device according to any one of claims 1-9, characterized in that: Includes the following steps: S1. Powder material is first added from the top feed hopper (6). Before entering the device, the material flows through the top support frame (7) area. Multiple first dust suction heads (8) installed in the frame are activated to suck the floating dust mixed in the material, light and easily dusted fine powder into the first ring dust suction box (9) through the pipe, and then enter the subsequent dust removal system through the dust suction pipe (10) to achieve the initial dust removal at the feed inlet and reduce the escape of dust. S2. After the material falls into the screening box (4), a crushing roller (24) is driven to rotate by a motor (5). Through the transmission of two meshing gears (25), the two crushing rollers (24) rotate relative to each other, squeezing and crushing the agglomerated or large particles, making them easier to screen and transport later. One of the gears (25) drives the gear (27) and the eccentric wheel (29) fixed on it to rotate. The rotation of the eccentric wheel (29) will periodically hit or push the screening screen plate (30), causing it to slide back and forth in the screening box (4). The screening screen plate (30) is buffered and reset by the spring damper (33) at the bottom, forming a high-efficiency vibrating screening mechanism. The vibration of the screening screen plate (30) drives the bottom connecting frame (34) and the screening screen plate (35) fixed to it to move together. S3. The material is first screened on the No. 1 screening screen (30). The material that meets the first-level particle size requirements (fine powder) falls through the screen holes, while the material that does not meet the requirements (larger particles) is screened out and discharged through the No. 1 discharge box (31) and the No. 1 discharge pipe (32). The material that has passed the first-level screening falls on the No. 2 screening screen (35) to continue the second-level screening. The finer material falls through its screen holes, while the medium-sized material on the screen is screened out and discharged through the No. 2 discharge box (36) and the No. 2 discharge pipe (37), thereby achieving the grading of the material. S4. The qualified powder after secondary screening falls into the discharge hopper (11) and enters the conveying support box (12). The motor (23) drives the spiral blade conveying shaft (13) to rotate, pushing the powder forward. The powder is conveyed to the discharge hood (19) through the discharge pipe (14) and the discharge head (15) for unloading. At the unloading point, the No. 2 annular dust collection box (20) installed at the bottom of the discharge hood (19) and its multiple No. 2 dust collection heads (21) are activated to capture the dust generated during unloading and connect to the dust removal system through the dust discharge pipe on its side to realize dust control at the discharge port. S5. The dust removal operation of the entire device is powered by a vacuum blower (38). The vacuum blower (38) draws air from the maintenance box (39) and the side vacuum box (40) through the air duct, generating negative pressure. The dust-laden airflow collected by the first vacuum head (8) and the second vacuum head (21) is collected in the side vacuum box (40) through the vacuum pipe (10) and the corresponding pipes. The dust is filtered and collected by the dust collection bag (18), and the purified air is discharged through the exhaust pipe (17) of the vacuum blower (38). The dust collection pipe (41) can be used to connect other possible dust points of the equipment. When cleaning, the sealed maintenance door can be opened to replace or clean the dust collection net bag (18). The entire device is mainly supported by the support base frame (1) and the top support frame (2). The top fixed frame (22) provides reinforcement for the conveying part. The power source of the motor (5) and the motor (23) can be provided by the battery (16) set inside the device or by an external power source. The components are mainly fixed by bolts, which facilitates installation and maintenance.

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