Anti-clogging fertilizer conveying device

Abstract

The present application relates to conveying equipment technical field, especially provide a kind of anti-clogging fertilizer conveying device.The anti-clogging fertilizer conveying device includes the arrangement of first level feeding conveying component, second level intermediate conveying component and third level terminal conveying component from top to bottom in turn.The first level feeding component shell top is equipped with pressure relief port, can discharge air, eliminate air plug and blockage hidden danger in time;Spiral blade is equipped with gradually changing opening to scatter agglomerated material, and is matched with reinforcing rib to make up the opening intensity defect;Blade outer edge is equipped with detachable polyurethane elastic insert strip, realize flexible wall cleaning, prevent powder accumulation while reducing material breakage rate.Secondary, third level uses complete spiral blade to realize steady pressure transfer and smooth discharge.The device structure layout is reasonable, effectively solve the fertilizer conveying blockage, powder accumulation, particle breakage and other problems, conveying is smooth and stable, low failure rate, adapt to fertilizer continuous scale production use.

Description

Technical Field

[0001] This invention relates to the field of conveying equipment technology, and in particular to a fertilizer conveying device that can prevent blockage. Background Technology

[0002] In the industrial production and transportation of fertilizers, granular fertilizers, organic fertilizers, and compound fertilizers generally have the characteristics of being hygroscopic and sticky, having a high fine powder content, being prone to agglomeration and clumping, being prone to caking under pressure, and having high particle brittleness. Currently, the industry generally uses multi-stage screw conveyor equipment to complete material transfer. However, existing multi-stage screw conveyor equipment mostly adopts a completely homogeneous design for each stage, resulting in many technical defects in actual production, such as frequent material blockage, serious powder accumulation on the cylinder wall, high material breakage rate, and poor operational stability.

[0003] Traditional conveying equipment uses a closed feeding chamber, where material falls rapidly and in a concentrated manner. The large amount of air trapped during transport cannot be expelled in time, easily forming high-pressure airlocks within the chamber. These airlocks compress the fertilizer powder, forming a caked layer, leading to feeding blockages, material shortages, and backflow shutdowns, severely impacting the continuous operation efficiency of the production line. Furthermore, traditional spiral blades are closed, single-plate structures, unable to disperse and divert damp, agglomerated fertilizer clumps, resulting in significant material compression and accumulation. Even with perforated structures to alleviate blockages, blade strength is generally insufficient, making them prone to deformation and cracking under prolonged material impact, resulting in poor reliability. Summary of the Invention

[0004] Therefore, it is necessary to provide a fertilizer conveying device that can prevent clogging, in order to solve at least one of the technical problems in the prior art.

[0005] A clog-resistant fertilizer conveying device includes a multi-stage conveying support frame, a primary feeding conveying assembly, a secondary intermediate conveying assembly, and a tertiary terminal conveying assembly. The primary feeding conveying assembly, the secondary intermediate conveying assembly, and the tertiary terminal conveying assembly are all installed sequentially from top to bottom on the top of the multi-stage conveying support frame. The primary feeding conveying assembly includes a primary support component, a primary spiral housing component, a primary drive component, a primary spiral conveying main shaft, spiral blades, and a detachable maintenance cover. The primary spiral housing component is installed on top of the primary support component, the primary drive component is installed on one side of the primary spiral housing component, the middle part of the primary spiral conveying main shaft is housed inside the primary spiral housing component, and one end of the primary spiral conveying main shaft is connected to the primary drive component. The spiral blades are wound around the middle part of the primary spiral conveying main shaft. The maintenance cover is placed on top of the primary spiral housing component, and multiple pressure relief ports are opened at the top of the maintenance cover away from the primary drive component. Multiple gradually changing openings are opened in the middle of the spiral blades, and reinforcing ribs are opened on the side of the multiple gradually changing openings adjacent to the secondary intermediate conveying assembly. Multiple elastic strips are sleeved on the outer periphery of the spiral blades.

[0006] As a further improvement of the present invention, the top of the multi-stage conveying support frame is sequentially equipped with a first-layer bearing platform, a second-layer bearing platform, and a third-layer bearing platform from top to bottom. The second-layer bearing platform is located between the first-layer bearing platform and the third-layer bearing platform. The first-stage feeding conveying assembly is installed on the top of the first-layer bearing platform, the first-stage support member is installed on the top of the first-layer bearing platform, the second-stage intermediate conveying assembly is installed on the top of the second-layer bearing platform, and the third-stage end conveying assembly is installed on the top of the third-layer bearing platform. Both ends of the first-stage spiral conveying main shaft rotatably penetrate the side walls of both ends of the first-stage spiral housing component, and both ends of the first-stage spiral conveying main shaft extend outward toward the two ends of the first-stage spiral housing component.

[0007] As a further improvement of the present invention, the primary support includes a hopper support platform and a primary spiral shell support platform. Both the hopper support platform and the primary spiral shell support platform are installed on the top of the first layer bearing platform, and the hopper support platform is located on the side away from the secondary intermediate conveying component.

[0008] As a further improvement of the present invention, the primary spiral shell component includes a hopper shell and a primary spiral shell, the hopper shell and the primary spiral shell are connected, and the hopper shell is installed on the top of the hopper support platform, the primary spiral shell is installed on the top of the primary spiral shell support platform, and the middle part of the primary spiral conveying main shaft rotatably passes through the side wall of the hopper shell and the primary spiral shell.

[0009] As a further improvement of the present invention, the primary drive component includes a motor support platform, a primary motor, a drive sprocket, a transmission chain, and a driven sprocket. The motor support platform is connected to one side of the hopper housing. The primary motor is mounted on the top of the motor support platform. The middle part of the drive sprocket is connected to the output end of the primary motor. One end of the transmission chain is wrapped around the outside of the drive sprocket. The middle part of the driven sprocket is connected to one end of the primary screw conveyor shaft, and one end of the transmission chain is wrapped around the outside of the driven sprocket.

[0010] As a further improvement of the present invention, the primary feeding conveying assembly also includes an observation and maintenance door and a primary discharge cone. The observation and maintenance door is installed on the other side wall of the hopper housing, and the primary discharge cone is installed at the bottom of the primary spiral housing away from the primary drive component.

[0011] As a further improvement of the present invention, the secondary intermediate conveying assembly includes a secondary support platform, a secondary drive component, and a secondary conveying component. The secondary support platform and the secondary drive component are respectively installed at the top two ends of the second-layer bearing platform, and the secondary support platform is located at one end adjacent to the tertiary end conveying assembly. The secondary conveying component is installed on the top of the secondary support platform, and the secondary conveying component is connected to the secondary drive component in a transmission manner. The bottom of the primary discharge cone is connected to the feed end of the secondary conveying component.

[0012] As a further improvement of the present invention, the secondary drive component includes a secondary motor and a secondary coupling. The secondary motor is installed on the top of the second-layer support platform. One side of the secondary coupling is connected to the output end of the secondary motor. The secondary conveying component includes a secondary cylinder and a secondary spiral conveying shaft. The secondary cylinder is installed on the top of the secondary support platform. The middle part of the secondary spiral conveying shaft is rotatably housed inside the secondary cylinder, and one end of the secondary spiral conveying shaft is rotatably locked at the end of the secondary cylinder. The other end of the secondary spiral conveying shaft rotatably passes through the other end of the secondary cylinder, and the other end of the secondary spiral conveying shaft is connected to the other side of the secondary coupling. A discharge port is opened at the end of the secondary cylinder adjacent to the third-stage end conveying assembly.

[0013] As a further improvement of the present invention, the three-stage end conveying assembly includes a three-stage support platform, a three-stage drive component, and a three-stage conveying component. The three-stage support platform and the three-stage drive component are respectively installed at the top two ends of the third-layer bearing platform, and the three-stage support platform is located at the end away from the two-stage intermediate conveying assembly. The three-stage conveying component is installed on the top of the three-stage support platform, and the three-stage conveying component and the three-stage drive component are connected in a transmission manner.

[0014] As a further improvement of the present invention, the three-stage drive component includes a three-stage motor and a three-stage coupling. The three-stage motor is installed on the top of the third-level support platform. One side of the three-stage coupling is connected to the output end of the three-stage motor. The three-stage conveying component includes a three-stage cylinder and a three-stage spiral conveying shaft. The three-stage cylinder is installed on the top of the three-stage support platform. The middle part of the three-stage spiral conveying shaft is rotatably housed inside the three-stage cylinder. One end of the three-stage spiral conveying shaft is rotatably locked at the end of the three-stage cylinder. The other end of the three-stage spiral conveying shaft rotatably passes through the other end of the three-stage cylinder. The other end of the three-stage spiral conveying shaft is connected to the other side of the three-stage coupling. An arc-shaped discharge pipe is installed at the end of the three-stage cylinder away from the second-stage intermediate conveying component. A receiving hopper is installed at the top of the end of the three-stage cylinder adjacent to the second-stage intermediate conveying component. The receiving hopper is located directly below the discharge port.

[0015] The beneficial effects of this invention are as follows: 1. This design incorporates a detachable elastic insert on the outer edge of the primary spiral blade, achieving a flexible wall-cleaning, anti-sticking, and anti-breakage effect. The elastic insert, made of polyurethane, is soft and conforms to the cylinder wall, continuously scraping away fine powder adhering to the wall and preventing the powder from accumulating and hardening to form a stubborn blockage layer. Therefore, the primary feeding conveyor assembly exhibits excellent anti-powder accumulation and anti-sticking effects. Simultaneously, the flexible contact prevents crushing or shearing of fertilizer particles, significantly reducing the breakage rate during fertilizer conveying, effectively ensuring the integrity of fertilizer particles, and significantly improving the quality of the finished fertilizer. Furthermore, the elastic insert is detachable and replaceable, eliminating the need to replace the entire spiral blade, resulting in low replacement costs and convenient maintenance.

[0016] 2. This design utilizes a gradually changing opening structure in the primary spiral blades to automatically disperse, divert, and depressurize fertilizer materials that momentarily collapse or agglomerate during feeding. This releases material compression stress and prevents material from accumulating and clogging at the spiral feed inlet. Simultaneously, reinforcing ribs are installed on the back of the gradually changing opening to effectively compensate for structural strength deficiencies in the blades, preventing deformation, twisting, and cracking under long-term heavy-load conveying. This ensures anti-clogging performance while improving structural lifespan and equipment reliability.

[0017] 3. The pressure relief port in this design can discharge compressed air trapped in the feed chamber in real time, breaking the pressure buildup mechanism of the sealed airlock. This effectively prevents fertilizer powder from being compacted and caking under air pressure, eliminating airlock blockage, backflow, and material interruption, significantly reducing equipment downtime due to blockage, and improving the continuous operation capability of the production line. The pressure relief port is located in the air accumulation area of ​​the cover plate away from the drive end, avoiding the direct material impact area, making it less prone to powder accumulation and blockage, and ensuring stable and reliable long-term pressure relief effect.

[0018] 4. This project adopts a top-down three-level platform gravity-type series conveyor structure. Materials fall and are transferred step by step by their own weight, resulting in low conveying resistance, low energy consumption, smooth conveying, and reduced likelihood of material jamming or stagnation. Each level of conveying component is independently supported and driven, with a clear division of labor in the transmission structure. The first level uses sprocket and chain drive, which has overload buffering capacity and is suitable for working conditions with large fluctuations in material load at the feed end. The second and third levels use direct coupling drive, which has high transmission efficiency and stable output, and is suitable for the stable conveying needs of intermediate and final stages. The overall transmission system has a high degree of matching with operating conditions and a low failure rate. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the present invention.

[0020] Figure 2 This is a three-dimensional schematic diagram of another embodiment of the present invention.

[0021] Figure 3 This is a three-dimensional schematic diagram of a primary feeding conveyor assembly according to an embodiment of the present invention.

[0022] Figure 4 This is a cross-sectional view of a primary feeding conveyor assembly according to an embodiment of the present invention.

[0023] Figure 5 This is a three-dimensional schematic diagram of a portion of the primary feeding conveyor assembly according to an embodiment of the present invention.

[0024] Figure 6 This is a cross-sectional view of an embodiment of the present invention.

[0025] 10. Multi-stage conveyor support frame; 11. First-level bearing platform; 12. Second-level bearing platform; 13. Third-level bearing platform; 20. First-stage feeding conveyor assembly; 21. First-stage support component; 22. First-stage spiral shell component; 23. First-stage drive component; 24. First-stage spiral conveyor main shaft; 25. Spiral blade; 26. Inspection cover plate; 27. Pressure relief port; 28. Gradient opening; 29. ​​Reinforcing rib; 200. Elastic strip; 201. Observation and maintenance door; 202. First-stage discharge cone; 210. Hopper support platform; 211. First-stage spiral shell support platform; 220. Hopper shell; 221. First-stage spiral shell; 230. Electric... 231. Machine support platform; 232. Primary motor; 233. Drive sprocket; 234. Driven sprocket; 30. Secondary intermediate conveyor assembly; 31. Secondary support platform; 32. Secondary drive component; 33. Secondary conveyor component; 34. Secondary motor; 35. Secondary coupling; 36. Secondary cylinder; 37. Secondary screw conveyor shaft; 38. Discharge port; 40. Tertiary end conveyor assembly; 41. Tertiary support platform; 42. Tertiary drive component; 43. Tertiary conveyor component; 44. Tertiary motor; 45. Tertiary coupling; 46. Tertiary cylinder; 47. Tertiary screw conveyor shaft; 48. Discharge pipe; 49. Receiving hopper. Detailed Implementation

[0026] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0027] In the description of this invention, it should be noted that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 limitations on this invention.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] Please see Figures 1 to 6A fertilizer conveying device that can prevent blockage is composed of a multi-stage conveying support frame 10, a primary feeding conveying component 20, a secondary intermediate conveying component 30, and a tertiary terminal conveying component 40. The structure of each stage is assembled from top to bottom to form a gravity-driven step-by-step conveying system. It systematically solves the problems of easy air blockage, easy caking, easy material blockage, and easy particle breakage in fertilizer conveying from the aspects of structural layout, power transmission, and material conveying mechanism.

[0030] The multi-stage conveyor support frame 10 serves as the base for the entire machine. Three layers—a first-layer support platform 11, a second-layer support platform 12, and a third-layer support platform 13—are fixedly installed along its height. These three platforms are parallel to each other and form a fixed drop from top to bottom. The first-layer support platform 11 supports the entire primary feeding conveyor assembly 20, utilizing the height difference to allow materials to fall autonomously. The second-layer support platform 12 is centrally located and supports the secondary intermediate conveyor assembly 30, ensuring smooth material transfer and buffering. The third-layer support platform 13 is located at the bottom and supports the tertiary final conveyor assembly 40, completing the final discharge conveying. This layered layout ensures vertical alignment of the three-stage conveyor structure and a straight material path, effectively avoiding problems such as spillage, stagnation, and blockage during the conveying process.

[0031] The primary feeding and conveying assembly 20 has multiple functions including feeding, venting, dispersing, wall cleaning, and preventing breakage. It consists of a primary support component 21, a primary spiral shell component 22, a primary drive component 23, a primary spiral conveying main shaft 24, spiral blades 25, and a detachable maintenance cover 26. The primary support component 21 includes a hopper support platform 210 and a primary spiral shell support platform 211. The hopper support platform 210 independently supports the hopper shell 220, and the primary spiral shell support platform 211 independently supports the primary spiral shell 221. This achieves separate load-bearing, precise alignment, and uniform force distribution, avoiding material jamming and blockage problems caused by shell misalignment and coaxiality deviation due to long-term heavy-load operation.

[0032] The primary spiral shell 22 is composed of a hopper shell 220 and a primary spiral shell 221 that are interconnected. The hopper shell 220 serves as a material buffer feeding section to receive upstream feed and achieve material buffering and even distribution. The primary spiral shell 221 is a closed conveying cavity that works with the spiral blades 25 to push materials. The primary spiral conveying main shaft 24 rotates through the sidewalls of the shell at both ends and adopts a two-end support structure, which has high rotational stability and small radial runout, and can effectively avoid blade wall rubbing, uneven wear, and material squeezing and accumulation problems.

[0033] The primary drive unit 23 adopts a sprocket and chain drive structure, suitable for working conditions with large load fluctuations in the feeding section. The primary motor 231 is fixed on an independent motor support platform 230, and its output end is connected to the drive sprocket 232. The drive sprocket 232 drives the driven sprocket 234 to rotate through the meshing of the transmission chain 233, thereby driving the primary screw conveyor main shaft 24 to rotate. Compared with rigid direct drive, chain drive has buffering and shock absorption functions, and overload slippage protection functions. When there is instantaneous material accumulation or slight jamming, it can adaptively unload force to avoid equipment jamming and motor overload burnout, greatly improving the safety of equipment operation.

[0034] A removable maintenance cover 26 is installed on the top of the primary spiral casing 221. Multiple pressure relief ports 27 are opened on the top of the maintenance cover 26 away from the primary drive component 23. This location is the highest point of air accumulation in the cavity, preventing direct impact from materials and reducing clogging. It can continuously discharge entrained air throughout the material conveying process, balancing the air pressure inside and outside the cavity, and completely eliminating the phenomenon of air pressure compaction of fine powder and material blockage, thus solving the problem of air lock failure in fertilizer conveying from the source. At the same time, the removable cover structure facilitates the opening of the cover for cleaning, inspection, and maintenance of the equipment, with no dead corners for cleaning.

[0035] Several gradually changing openings 28 are formed in the middle of the spiral blade 25. When materials are fed in a concentrated manner and agglomerate, the gradually changing openings 28 can divert, cut, and loosen the materials, breaking the overall compression state of the materials, releasing the conveying compression stress, and preventing the materials from being compacted and accumulated in the spiral feeding section. To overcome the problem of reduced blade strength caused by the openings, reinforcing ribs 29 are integrally set on the side of each gradually changing opening 28 near the discharge side, that is, on the side adjacent to the secondary intermediate conveying component 30. This effectively improves the structural rigidity of the opening area, prevents the blades from deforming, warping, and cracking due to long-term friction and compression of materials, and ensures the long-term stable operation of the equipment.

[0036] The outer edge of the spiral blade 25 is circumferentially fitted with multiple detachable elastic strips 200. Made of polyurethane, these strips possess high elasticity, wear resistance, non-stick properties, and a soft texture. During operation, the elastic strips 200 flexibly conform to the inner wall of the primary spiral shell 221, rotating with the shaft. This allows for real-time scraping of fine powder adhering to the cylinder wall, preventing the powder from accumulating and hardening, thus achieving continuous anti-sticking and anti-clogging. Simultaneously, the flexible contact replaces traditional rigid metal scraping, avoiding squeezing, shearing, or crushing of brittle fertilizer particles, greatly preserving the integrity of the fertilizer particles and improving the quality of the finished product. Furthermore, the strips are independently detachable and can be replaced individually after wear, eliminating the need to replace the entire blade and reducing maintenance costs.

[0037] The hopper shell 220 is equipped with an observation and maintenance door 201 on its side wall, which allows for real-time and intuitive observation of the internal material feeding status, accumulation status, and blade operation status, facilitating timely prediction and intervention by staff to detect material blockage risks. The first-stage spiral shell 221 is equipped with a first-stage discharge cone 202 at the bottom of its discharge end. Through the conical surface contraction and flow guidance, the material after the first-stage pretreatment is concentrated and falls vertically, accurately connecting to the second-stage conveying feed position, achieving stable feeding without spillage, leakage, or deviation.

[0038] The secondary intermediate conveying assembly 30, serving as a mid-stage stable flow conveying structure, undertakes the functions of material homogenization, pressure stabilization, and flow rate stabilization during transfer. It consists of a secondary support platform 31, a secondary drive component 32, and a secondary conveying component 33. The secondary motor 34 is rigidly and directly connected to the secondary screw conveyor shaft 37 via a secondary coupling 35, ensuring high transmission efficiency, stable speed, and no transmission backlash, thus guaranteeing a uniform and continuous transfer flow. The interior of the secondary cylinder 36 can employ either a complete continuous screw blade 25 or the screw blade 25 structure of the primary feeding conveying assembly 20, achieving smooth material transition and effectively matching the conveying rhythms of the preceding and following stages. Finally, the material precisely falls downwards through the discharge port 38 at the end of the secondary cylinder 36.

[0039] The three-stage end-of-line conveying assembly 40 serves as the end-of-line material discharge execution structure, consisting of a three-stage support platform 41, a three-stage drive component 42, and a three-stage conveying component 43. A receiving hopper 49 is installed at the top of the three-stage cylinder 46 corresponding to the position of the two-stage discharge port 38, achieving seamless material reception between the two stages and preventing material spillage. The three-stage motor 44 drives the three-stage spiral conveyor shaft 47 to rotate at a uniform speed via a three-stage coupling 45, using a continuous spiral pushing method to smoothly convey the material to the end, finally discharging it smoothly through the arc-shaped discharge pipe 48. The discharge process is free of splashing, dust, and material stagnation, making it suitable for downstream continuous production processes.

[0040] Installation process: The primary feeding conveyor assembly 20, the secondary intermediate conveyor assembly 30, and the tertiary end conveyor assembly 40 are installed sequentially from top to bottom on the top of the multi-stage conveyor support frame 10. The primary spiral housing component 22 is installed on the top of the primary support component 21, the primary drive component 23 is installed on one side of the primary spiral housing component 22, the primary feeding conveyor assembly 20 is installed on the top of the first-layer bearing platform 11, the primary support component 21 is installed on the top of the first-layer bearing platform 11, the secondary intermediate conveyor assembly 30 is installed on the top of the second-layer bearing platform 12, and the tertiary end conveyor assembly 40 is installed on the top of the third-layer bearing platform 13. Both the hopper support platform 210 and the first-stage spiral shell support platform 211 are installed on the top of the first-layer bearing platform 11. The hopper shell 220 is installed on the top of the hopper support platform 210, the first-stage spiral shell 221 is installed on the top of the first-stage spiral shell support platform 211, the first-stage motor 231 is installed on the top of the motor support platform 230, the observation and maintenance door 201 is installed on the other side wall of the hopper shell 220, and the first-stage discharge cone 202 is installed at the bottom of the first-stage spiral shell 221 away from the first-stage drive component 23. The secondary support platform 31 and the secondary drive component 32 are respectively installed at the top ends of the second-layer bearing platform 12. The secondary conveyor component 33 is installed on the top of the secondary support platform 31. The secondary motor 34 is installed on the top of the second-layer bearing platform 12. The secondary cylinder 36 is installed on the top of the secondary support platform 31. The tertiary support platform 41 and the tertiary drive component 42 are respectively installed at the top ends of the third-layer bearing platform 13. The tertiary conveyor component 43 is installed on the top of the tertiary support platform 41. The tertiary motor 44 is installed on the top of the third-layer bearing platform 13. The tertiary cylinder 46 is installed on the top of the tertiary support platform 41.

[0041] In operation, fertilizer material is fed into the primary feeding and conveying assembly 20 from top to bottom, and is pushed in by the screw conveyor. During feeding, the air entrained in the material can be discharged in time through the pressure relief port 27 at the top of the inspection cover 26, effectively eliminating the risk of air blockage caused by air pressure accumulation inside the sealed cavity, reducing the degree of material compaction and caking, and reducing the burden and increasing efficiency for subsequent operations such as the gradual opening 28 to disperse material clumps and the elastic strip 200 to clean the walls; at the same time, the gradual opening 28 set on the screw blade 25 rotates synchronously with the main shaft, which can cut, divert and loosen fertilizer clumps that collapse and absorb moisture during the feeding process layer by layer, avoiding the accumulation of large pieces of material that cause feeding blockage, reducing the impact load of the material, reducing the pressure on the reinforcing rib 29, and reducing the pressure and wear of blocky materials on the elastic strip 200; the reinforcing rib 29 is set on the side of the gradual opening 28. Rib 29 effectively compensates for the insufficient strength caused by the blade openings, enhances the overall structural rigidity of the blade, avoids blade deformation and cracking caused by long-term material impact and friction, ensures that the gradual opening 28 always maintains a regular structure to stably disperse materials, and keeps the elastic insert 200 in a precise state of adhering to and cleaning the wall. At the same time, the elastic insert 200 mounted on the outer edge of the blade continuously and flexibly adheres to the inner wall of the cylinder and rotates, scraping off the adhering fertilizer powder in real time, preventing the powder from accumulating and hardening to form a material accumulation layer, and avoiding the accumulation of material on the cylinder wall from occupying the cavity space and obstructing airflow. This further ensures that the pressure relief port 27 exhausts smoothly and that the gradual opening 28 disperses materials evenly and stably. At the same time, relying on the flexible contact characteristics, it reduces the crushing and shearing of brittle fertilizer particles, significantly reducing the material breakage rate. The four elements work together, complement each other's shortcomings, and empower each other to jointly build a comprehensive anti-clogging, anti-powder accumulation, and anti-breakage feeding system. After undergoing comprehensive anti-clogging pretreatment including pressure relief and venting, material agglomeration, flexible wall cleaning, and anti-breakage, the material smoothly falls through the primary feeding cone hopper 202 to the secondary intermediate conveying assembly 30. Utilizing a two-stage continuous spiral structure, it achieves uniform flow and stable pressure transfer, eliminating conveying disturbances caused by feed fluctuations. Finally, the material enters the tertiary end conveying assembly 40, where it is uniformly pushed by the end spiral and smoothly discharged through the arc-shaped discharge pipe 48, completing the entire multi-stage continuous conveying operation. The entire machine is designed with three levels of differentiated chemical conditions, ensuring smooth material conveying throughout the process, without stagnation, powder accumulation, or clogging. It maintains high particle integrity, resulting in excellent overall conveying performance and stable, reliable equipment operation.

[0042] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A fertilizer conveying device that prevents clogging, characterized in that: The system includes a multi-stage conveyor support frame (10), a primary feeding conveyor assembly (20), a secondary intermediate conveyor assembly (30), and a tertiary end conveyor assembly (40). The primary feeding conveyor assembly (20), the secondary intermediate conveyor assembly (30), and the tertiary end conveyor assembly (40) are all installed sequentially from top to bottom on the top of the multi-stage conveyor support frame (10). The primary feeding conveyor assembly (20) includes a primary support component (21), a primary spiral housing component (22), a primary drive component (23), a primary spiral conveyor main shaft (24), spiral blades (25), and a removable maintenance cover plate (26). The primary spiral housing component (22) is installed on top of the primary support component (21), and the primary drive component (23) is installed on the primary spiral housing component (22). On one side, the middle part of the primary spiral conveying main shaft (24) is housed inside the primary spiral housing (22), and one end of the primary spiral conveying main shaft (24) is connected to the primary drive (23). The spiral blade (25) is wound around the middle part of the primary spiral conveying main shaft (24). The maintenance cover (26) is placed on the top of the primary spiral housing (22), and multiple pressure relief ports (27) are opened at the top of the maintenance cover (26) away from the primary drive (23). Multiple gradual openings (28) are opened in the middle part of the spiral blade (25). The multiple gradual openings (28) are provided with reinforcing ribs (29) on the side of the secondary intermediate conveying assembly (30) adjacent to the multiple gradual openings (28). Multiple elastic strips (200) are sleeved on the outer periphery of the spiral blade (25).

2. The anti-clogging fertilizer conveying device according to claim 1, characterized in that: The top of the multi-stage conveying support frame (10) is equipped with a first-layer bearing platform (11), a second-layer bearing platform (12) and a third-layer bearing platform (13) in sequence from top to bottom. The second-layer bearing platform (12) is located between the first-layer bearing platform (11) and the third-layer bearing platform (13). The first-stage feeding conveying assembly (20) is installed on the top of the first-layer bearing platform (11). The first-stage support member (21) is installed on the top of the first-layer bearing platform (11). The second-stage intermediate conveying assembly (30) is installed on the top of the second-layer bearing platform (12). The third-stage end conveying assembly (40) is installed on the top of the third-layer bearing platform (13). The two ends of the first-stage spiral conveying main shaft (24) are rotatably inserted through the two end side walls of the first-stage spiral housing (22), and the two ends of the first-stage spiral conveying main shaft (24) extend toward the two end outer sides of the first-stage spiral housing (22).

3. The anti-clogging fertilizer conveying device according to claim 2, characterized in that: The primary support component (21) includes a hopper support platform (210) and a primary spiral shell support platform (211). Both the hopper support platform (210) and the primary spiral shell support platform (211) are installed on the top of the first-layer bearing platform (11), and the hopper support platform (210) is located on the side away from the secondary intermediate conveying component (30).

4. The anti-clogging fertilizer conveying device according to claim 3, characterized in that: The primary spiral shell component (22) includes a hopper shell (220) and a primary spiral shell (221). The hopper shell (220) and the primary spiral shell (221) are connected. The hopper shell (220) is installed on the top of the hopper support platform (210), and the primary spiral shell (221) is installed on the top of the primary spiral shell support platform (211). The middle part of the primary spiral conveying main shaft (24) rotatably passes through the side wall of the hopper shell (220) and the primary spiral shell (221).

5. The anti-clogging fertilizer conveying device according to claim 1, characterized in that: The primary drive unit (23) includes a motor support platform (230), a primary motor (231), a drive sprocket (232), a transmission chain (233), and a driven sprocket (234). The motor support platform (230) is connected to one side of the hopper housing (220). The primary motor (231) is installed on the top of the motor support platform (230). The middle part of the drive sprocket (232) is connected to the output end of the primary motor (231). One end of the transmission chain (233) is wrapped around the outside of the drive sprocket (232). The middle part of the driven sprocket (234) is connected to one end of the primary screw conveyor main shaft (24), and one end of the transmission chain (233) is wrapped around the outside of the driven sprocket (234).

6. The anti-clogging fertilizer conveying device according to claim 1, characterized in that: The primary feeding conveyor assembly (20) also includes an observation and maintenance door (201) and a primary discharge cone (202). The observation and maintenance door (201) is installed on the other side wall of the hopper housing (220), and the primary discharge cone (202) is installed at the bottom of the primary spiral housing (221) away from the primary drive unit (23).

7. The anti-clogging fertilizer conveying device according to claim 6, characterized in that: The secondary intermediate conveying assembly (30) includes a secondary support platform (31), a secondary drive component (32), and a secondary conveying component (33). The secondary support platform (31) and the secondary drive component (32) are respectively installed at the top two ends of the second-layer bearing platform (12), and the secondary support platform (31) is located at one end adjacent to the tertiary end conveying assembly (40). The secondary conveying component (33) is installed on the top of the secondary support platform (31), and the secondary conveying component (33) is connected to the secondary drive component (32) in a transmission connection. The bottom of the primary discharge cone (202) is connected to the feed end of the secondary conveying component (33).

8. The anti-clogging fertilizer conveying device according to claim 7, characterized in that: The secondary drive unit (32) includes a secondary motor (34) and a secondary coupling (35). The secondary motor (34) is installed on the top of the second-layer support platform (12). One side of the secondary coupling (35) is connected to the output end of the secondary motor (34). The secondary conveying unit (33) includes a secondary cylinder (36) and a secondary screw conveyor shaft (37). The secondary cylinder (36) is installed on the top of the secondary support platform (31). The middle part of the secondary screw conveyor shaft (37) is rotatably housed inside the secondary cylinder (36). One end of the secondary screw conveyor shaft (37) is rotatably locked at the end of the secondary cylinder (36). The other end of the secondary screw conveyor shaft (37) rotatably passes through the other end of the secondary cylinder (36). The other end of the secondary screw conveyor shaft (37) is connected to the other side of the secondary coupling (35). The end of the secondary cylinder (36) adjacent to the end of the third-stage end conveying assembly (40) is provided with a discharge port (38).

9. The anti-clogging fertilizer conveying device according to claim 8, characterized in that: The three-stage end conveying assembly (40) includes a three-stage support platform (41), a three-stage drive component (42), and a three-stage conveying component (43). The three-stage support platform (41) and the three-stage drive component (42) are respectively installed at the top two ends of the third-layer bearing platform (13), and the three-stage support platform (41) is located at the end away from the two-stage intermediate conveying assembly (30). The three-stage conveying component (43) is installed on the top of the three-stage support platform (41), and the three-stage conveying component (43) and the three-stage drive component (42) are connected in a transmission manner.

10. The anti-clogging fertilizer conveying device according to claim 9, characterized in that: The three-stage drive unit (42) includes a three-stage motor (44) and a three-stage coupling (45). The three-stage motor (44) is mounted on the top of the third-level support platform (13). One side of the three-stage coupling (45) is connected to the output end of the three-stage motor (44). The three-stage conveying unit (43) includes a three-stage cylinder (46) and a three-stage spiral conveying shaft (47). The three-stage cylinder (46) is mounted on the top of the three-stage support platform (41). The middle part of the three-stage spiral conveying shaft (47) is rotatably housed inside the three-stage cylinder (46), and one end of the three-stage spiral conveying shaft (47) is... Rotatably mounted at the end of the three-stage cylinder (46), the other end of the three-stage screw conveyor shaft (47) rotatably passes through the other end of the three-stage cylinder (46), and the other end of the three-stage screw conveyor shaft (47) is connected to the other side of the three-stage coupling (45). An arc-shaped discharge pipe (48) is installed at the end of the three-stage cylinder (46) away from the secondary intermediate conveyor assembly (30). A receiving hopper (49) is installed at the top of the end of the three-stage cylinder (46) adjacent to the secondary intermediate conveyor assembly (30), and the receiving hopper (49) is located directly below the discharge port (38).

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