Continuous conveying device for drying nitrogen-potassium fertilizer

Abstract

The utility model relates to nitrogen potassium fertilizer production technical field, concretely is a kind of nitrogen potassium fertilizer drying with continuous conveying device, including jar body, the conveying mechanism that is equipped with the fertilizer conveying along circumferential path in jar body, conveying mechanism includes several vertical through vertical cylinder, vertical cylinder is evenly arranged in jar body around jar body axis annular, conveying mechanism further includes central shaft, upper hole plate, lower hole plate and driving device, central shaft is vertically rotatably installed on the bottom wall in jar body, and it extends to the top of jar body, each vertical cylinder is fixed on the circumferential side of central shaft by fixed arm, driving device is located at the top of jar body, for driving central shaft rotation.The utility model is moved along circumferential path by driving vertical cylinder, realize the circumferential conveying of fertilizer, in combination with jar body circular vertical arrangement, compared with traditional character type arrangement equipment, greatly reduce overall occupied space, improve workshop space utilization, more conducive to compact layout of production line.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen and potassium fertilizer production technology, specifically a continuous conveying device for drying nitrogen and potassium fertilizer. Background Technology

[0002] Nitrogen-potassium fertilizer is a fertilizer that contains both nitrogen and potassium, two key nutrients. Nitrogen promotes the growth of plant stems and leaves and helps with chlorophyll synthesis and photosynthesis, while potassium enhances plant resistance to stress and improves fruit quality. It is suitable for various crops at growth stages that require simultaneous supplementation of nitrogen and potassium, and can synergistically meet the nutritional needs of plants, helping to increase yield and improve quality.

[0003] Nitrogen and potassium fertilizers require drying after production to remove excess moisture. This prevents granules from clumping, which would affect storage, transportation, and dispersibility during application. It also prevents moisture from causing microbial growth or chemical changes, thus avoiding fertilizer spoilage and nutrient loss. Furthermore, dried fertilizers have more stable physical properties and are better suited for packaging and storage environments. Due to the inherent characteristics of nitrogen and potassium fertilizers, high-temperature drying methods are not suitable; therefore, air drying is the most common method used.

[0004] Traditional air-drying equipment is usually arranged in a straight line, which takes up a lot of space and is not conducive to the rational use of space in the workshop. In addition, the operation is not continuous, and the machine needs to be stopped to load and unload materials during the drying process, resulting in low work efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a continuous conveying device for drying nitrogen and potassium fertilizers, so as to solve the technical problems mentioned in the background art.

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

[0007] A continuous conveying device for drying nitrogen and potassium fertilizer includes a tank body. Inside the tank body is a conveying mechanism for transporting fertilizer along a circumferential path. The conveying mechanism includes several vertically penetrating cylinders, which are evenly arranged in a ring around the tank body's axis. The conveying mechanism also includes a central shaft, an upper perforated plate, a lower perforated plate, and a driving device. The central shaft is vertically and rotatably mounted on the bottom wall of the tank body and extends through to the top of the tank body. Each cylinder is fixed to the circumference of the central shaft by a fixing arm. The driving device is located at the top of the tank body and is used to drive the central shaft to rotate, thereby moving each cylinder along the circumferential path. The top of the tank body has an inlet on the circumferential path, and the bottom has an outlet on the circumferential path, with the two arranged in a staggered manner.

[0008] Preferably, each vertical cylinder has an upper perforated plate fixed to its top and a lower perforated plate fixed to its bottom. The top of the vertical cylinder is flush with the upper surface of the upper perforated plate and is tightly fitted to the top wall of the tank. The bottom of the vertical cylinder is flush with the lower surface of the lower perforated plate and is tightly fitted to the bottom wall of the tank.

[0009] Preferably, a feed hopper is also fixed at the top of the tank, the bottom of the feed hopper is connected to the feed inlet, and the feed hopper is funnel-shaped, gradually narrowing downwards.

[0010] Preferably, an anti-bridging mechanism is also provided at the bottom of the feed hopper to move the fertilizer at the bottom of the feed hopper and prevent bridging. The anti-bridging mechanism includes a guide rod and a cross-shaped pusher. A horizontally penetrating sliding hole is provided on the side wall at the bottom of the feed hopper. The guide rod is slidably installed in the sliding hole. A cross-shaped pusher is fixedly fitted on the central shaft. A roller is rotatably installed on the outer end of the guide rod. The roller is pressed and abutted against the outer edge of the cross-shaped pusher. The cross-shaped pusher is used to periodically push the guide rod to move horizontally. A fixed plate is fixedly fitted on the guide rod. A spring is fitted on the guide rod. One end of the spring is fixed to the fixed plate, and the other end is fixed to the outer wall of the feed hopper.

[0011] Preferably, a slide rod is vertically fixed on the inner wall at the bottom of the feed hopper and on the side opposite to the sliding hole. Two sliding seats are slidably fitted on the slide rod. Two movable rods are hinged to the end of the guide rod located inside the feed hopper. The two movable rods are arranged in a horizontal V-shape. The other ends of the two movable rods are hinged to the two sliding seats one by one.

[0012] Preferably, the drive device includes a drive motor, a main gear, and a driven gear. The driven gear is fixed to the top of the central shaft, the drive motor is fixed to the top of the tank by a bracket, and the main gear is fixed to the output shaft of the drive motor and meshes with the driven gear.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows.

[0014] By driving the vertical cylinder to move continuously along the circumferential path, the fertilizer is conveyed in a circular manner. Combined with the circular vertical arrangement of the tanks, compared with the traditional linear arrangement of equipment, the overall space occupied is greatly reduced, the workshop space utilization rate is improved, and it is more conducive to the compact layout of the production line.

[0015] As the vertical cylinder moves along the circumferential path, fertilizer can be added into the cylinder when it aligns with the feed inlet. When the cylinder aligns with the discharge outlet, the dried fertilizer inside the cylinder can be discharged through the discharge outlet. The fertilizer can be dried continuously without stopping the machine, resulting in high operating efficiency.

[0016] The guide rod is periodically pushed by the cross-shaped pusher to move horizontally, causing the movable rod to swing at the bottom of the feed hopper, forming a dynamic unblocking structure. This effectively prevents fertilizer from bridging at the bottom of the feed hopper and ensures continuous and smooth feeding. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a partial structural diagram of the conveying mechanism in this utility model;

[0019] Figure 3 This is a schematic diagram of a partial internal structure of the tank in this utility model;

[0020] Figure 4 for Figure 2 The diagram shown omits the tank body.

[0021] Figure 5 This is one of the schematic diagrams of a partial structure of the top of the tank in this utility model;

[0022] Figure 6 This is a partial structural diagram of the bottom of the tank in this utility model;

[0023] Figure 7 A partial structural diagram of the air intake heating mechanism and the exhaust mechanism;

[0024] Figure 8 for Figure 7 Another perspective view of the structure shown;

[0025] Figure 9 This is a partial structural diagram of the air intake heating mechanism in this utility model;

[0026] Figure 10 This is the second schematic diagram of a partial structure of the top of the tank in this utility model;

[0027] Figure 11 This is a partial cross-sectional view of the feed hopper in this utility model;

[0028] Figure 12 This is one of the partial structural diagrams of the anti-bridging mechanism in this utility model;

[0029] Figure 13 This is the second partial structural diagram of the anti-bridging mechanism in this utility model.

[0030] In the diagram: 01. Gas collection hood A; 011. Air inlet; 02. Gas collection hood B; 03. Gas collection hood C; 04. Gas collection hood D; 1. Tank body; 11. Feed inlet; 12. Air outlet group A; 13. Air outlet group B; 14. Air inlet group A; 141. Buffer zone; 15. Air inlet group B; 16. Discharge outlet; 2. Conveying mechanism; 21. Central shaft; 22. Fixed arm; 23. Vertical cylinder; 24. Upper perforated plate; 25. Lower perforated plate; 26. Drive unit; 261. Support; 262. Drive motor; 263. Main gear; 264. Driven gear; 3. 31. Air intake heating mechanism; 32. Air intake tank; 33. Fan; 34. Electric heating grid; 35. Air intake pipe; 36. Branch pipe; 37. Guide pipe; 38. Pressure relief valve; 4. Drainage mechanism; 41. Main drain pipe; 42. Exhaust fan; 43. Drainage pipe; 5. Feed hopper; 6. Outer cover; 61. Annular dust collection chamber; 62. Dust collection pipe; 63. Annular interception net; 7. Anti-bridging mechanism; 701. Sliding hole; 71. Guide rod; 72. Sliding rod; 73. Sliding seat; 74. Movable rod; 75. Fixed plate; 76. Spring; 77. Cross-shaped pusher; 78. Roller. Detailed Implementation

[0031] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0032] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to 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 the embodiments of this utility model.

[0033] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0034] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0035] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of the present invention include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized. Example 1

[0036] Please see Figures 1-13 This utility model provides a continuous conveying device for drying nitrogen and potassium fertilizer, including a tank 1. The tank 1 is installed on a supporting base, so that the tank 1 is raised and arranged to make room at the bottom for the installation of other components. The tank 1 is provided with a conveying mechanism 2, which is used to convey fertilizer along a circumferential path, which is distributed around the axis of the tank 1.

[0037] Specifically, the conveying mechanism 2 includes a central shaft 21, several vertical cylinders 23, and a driving device 26. The vertical cylinders 23 are evenly arranged in a ring around the axis of the tank 1 inside the tank 1, and are all vertically continuous. The central shaft 21 is vertically rotatably mounted on the bottom wall of the tank 1 and extends through to the top of the tank 1. Each vertical cylinder 23 is fixed to the periphery of the central shaft 21 by a fixing arm 22. The driving device 26 is located at the top of the tank 1. Through the operation of the driving device 26, the central shaft 21 can be driven to rotate. Under the fixed connection of the fixing arm 22, the central shaft 21 drives each vertical cylinder 23 to move along the circumferential path, thereby enabling the fertilizer to be transferred along the circumferential path inside the tank 1.

[0038] like Figure 2 and Figure 3 As shown, the top of the tank 1 is provided with a feed inlet 11 and an air outlet group A12 along the circumferential path, and the bottom of the tank 1 is provided with an air inlet group A14 and a discharge outlet 16 along the circumferential path. Both the air outlet group A12 and the air inlet group A14 are composed of several small holes. These small holes can only allow gas to flow through, and fertilizer particles cannot pass through. The positions of the air outlet group A12 and the air inlet group A14 are vertically corresponding.

[0039] like Figure 1 As shown, one side of the tank body 1 is provided with an air intake heating mechanism 3 that is connected to the air intake hole group A14, which is used to generate hot air blown upward from the air intake hole group A14. The other side is provided with a discharge mechanism 4 that is connected to the air outlet group A12, which is used to discharge the exhaust gas from the air outlet group A12.

[0040] As the drive device 26 operates, it drives the vertical cylinder 23 to move in a circular motion. When the top of the vertical cylinder 23 is aligned with the feed inlet 11, fertilizer can fall into the vertical cylinder 23 through the feed inlet 11. In conjunction with the circular motion of the vertical cylinder 23, periodic feeding is achieved. At the same time, the fertilizer falling into the vertical cylinder 23 falls due to gravity, and the large clumps of fertilizer are broken up by impact and crushed into multiple small pieces of fertilizer, thus achieving pre-crushing.

[0041] In addition, when the drive device 26 drives the vertical cylinder 23 to rotate at a constant speed, the duration of communication between each vertical cylinder 23 and the feed inlet 11 is consistent, so that the amount of material fed each time remains basically consistent, thereby ensuring that the amount of fertilizer to be dried in each vertical cylinder 23 is evenly distributed and improving the consistency of drying.

[0042] As the drive device 26 drives the vertical cylinder 23 to continue moving downstream, when the vertical cylinder 23 containing fertilizer moves along the circumferential path to the position corresponding to the air outlet group A12 and the air inlet group A14, the hot airflow generated by the air inlet heating mechanism 3 flows into the vertical cylinder 23 through the air inlet group A14, forming a strong hot airflow inside the vertical cylinder 23, which blows the fertilizer upward. The fertilizer floats irregularly inside the vertical cylinder 23, and the high temperature of the airflow can dry the fertilizer. The hot airflow inside the vertical cylinder 23 is finally discharged upward through the air outlet group A12 and discharged by the drainage mechanism 4. As the vertical cylinder 23 continues to move along the circumferential path, when the bottom end is aligned with the discharge port 16, the dried fertilizer can be discharged from the discharge port 16.

[0043] By using upward hot airflow to carry fertilizer to float inside the vertical cylinder 23, a pneumatic stirring effect is achieved. Compared with traditional mechanical stirring, this reduces the excessive pulverization of fertilizer particles. In addition, the hot airflow is also used to dry the fertilizer, achieving two goals at once.

[0044] like Figure 3 As shown, there are at least three air inlet groups A14, all located on the circumferential path. There is a buffer zone 141 between two adjacent air inlet groups A14. The area of ​​the buffer zone 141 is larger than the area of ​​the cross section of the vertical cylinder 23. Therefore, when the vertical cylinder 23 moves to the position corresponding to the buffer zone 141, the hot air is interrupted due to the lack of airflow channel. Under the action of gravity, the floating fertilizer falls and hits the bottom wall of the tank 1 again, causing the small pieces of fertilizer to break up again.

[0045] The air inlet group A14 and the buffer zone 141 are provided with multiple locations, which allows the fertilizer to undergo multiple vertical throwing motions on the circumferential path. The lumpy fertilizer gradually dries from the outer layer to the inner layer. Combined with multiple gravity fall impacts, the fertilizer clumps can be gradually eliminated, ensuring uniform fertilizer particle size and improving the drying effect.

[0046] like Figure 10 As shown, the drive device 26 includes a drive motor 262, a main gear 263, and a driven gear 264. The driven gear 264 is fixed to the top of the central shaft 21. The drive motor 262 is fixed to the top of the tank 1 via a bracket 261. The main gear 263 is fixed to the output shaft of the drive motor 262 and meshes with the driven gear 264. When the drive motor 262 works, its output shaft drives the main gear 263 to rotate. The rotating main gear 263 meshes with and drives the driven gear 264, which in turn drives the central shaft 21 to rotate, providing effective drive for the fertilizer to be transported along a circumferential path. Example 2

[0047] Please see Figures 5-9 The difference between this embodiment and Embodiment 1 is that:

[0048] The air intake heating mechanism 3 includes an air intake tank 31, a fan 32, and an electric heating mesh 33. The air intake tank 31 is fixed to the outer wall of the tank body 1 by a support and extends vertically. The fan 32 is installed on the air intake tank 31. Several layers of electric heating mesh 33 are evenly distributed inside the air intake tank 31 below the fan 32 to heat the air in multiple stages and ensure the heat required for drying. In addition, a gas collection hood C03 is fixed at the bottom of the tank body 1 corresponding to the air inlet group A14. The gas collection hood C03 covers the air inlet group A14. The top of the air intake tank 31 is connected to an air inlet pipe 34, and the bottom is connected to a guide pipe 35. The end of the guide pipe 35 is connected to the air inlet group A14.

[0049] The blower 32 draws air through the air inlet pipe 34 into the air inlet tank 31. The air flows downward in the air inlet tank 31. At the same time, the electric heating grid 33 is powered on and heats up, which heats the airflow to form a hot airflow with the required temperature for drying. The hot airflow flows through the guide pipe 35 into the air inlet hole group A14, and then flows upward into the vertical cylinder 23 through the holes in the air inlet hole group A14 to form a vertical hot airflow for pneumatic stirring and drying of the fertilizer.

[0050] Among them, the blower 32 is a centrifugal blower, which is installed in series on the air inlet tank 31. The specific connection method adopts the existing technology, that is, the centrifugal blower can draw air from the air inlet pipe 34 into the air inlet tank 31 and flow into the guide pipe 35 at high speed. The use of centrifugal blower ensures that the generated air force is large enough to blow the fertilizer clumps upward in the vertical cylinder 23. The structure of the centrifugal blower and the connection in the attached figure is simplified.

[0051] The drainage mechanism 4 includes a main drain pipe 41 and an exhaust fan 42. The main drain pipe 41 is fixed to the outer wall of the tank 1 by a support. The exhaust fan 42 is installed on the main drain pipe 41. A gas collection hood D04 is fixed at the top of the tank 1 at the position corresponding to the position of the vent group A12. The gas collection hood D04 covers the vent group A12. A drain pipe 43 is connected to the gas collection hood D04. The end of the drain pipe 43 is connected to the main drain pipe 41.

[0052] The dried hot air flows into the gas collection hood D04 through the air outlet group A12 and then into the main exhaust pipe 41 through the exhaust pipe 43. The exhaust fan 42 blows the exhaust gas in the main exhaust pipe 41 downstream. The end of the main exhaust pipe 41 is connected to the exhaust gas treatment device (not shown in the figure). The exhaust gas treatment device can treat the exhaust gas before it is discharged. At the same time, the exhaust gas treatment device can also recover and reuse the residual heat in the exhaust gas.

[0053] In addition, a pressure relief valve 351 is installed on the guide pipe 35, which can effectively relieve pressure when the internal pressure is too high, ensuring the safety of equipment operation. Example 3

[0054] Please see Figure 3 , Figures 5-8 The difference between this embodiment and Embodiment 2 is that:

[0055] The bottom of the tank body 1 is provided with an air inlet group B15 located downstream of the air inlet group A14 and upstream of the discharge port 16 on the circumferential path. A gas collection hood A01 is fixed at the bottom of the tank body 1 corresponding to the position of the air inlet group B15. The gas collection hood A01 covers the air inlet group B15, and the bottom of the gas collection hood A01 has an air inlet 011 that communicates with the outside.

[0056] On the top of the tank body 1, an air outlet group B13 is provided at the position corresponding to the air inlet group B15 on the circumferential path. A gas collection hood B02 is fixed on the top of the tank body 1 at the position corresponding to the air outlet group B13. The gas collection hood B02 covers the air outlet group B13. The end of the air inlet pipe 34 is connected to the gas collection hood B02. A branch pipe 341 is also connected to the air inlet pipe 34, and the branch pipe 341 is connected to the outside air.

[0057] Among them, the air outlet group B13 and the air inlet group B15 are both composed of several small holes, which can only allow gas to flow through, and fertilizer particles cannot pass through.

[0058] When the blower 32 operates and creates negative pressure inside the air inlet tank 31, on the one hand, external air flows into the air inlet tank 31 through the branch pipe 341, achieving continuous replenishment of external air. On the other hand, when the vertical cylinder 23 moves along the circumferential path to the position corresponding to the air outlet group B13 and the air inlet group B15, the air inlet 011, the air collection hood A01, the air inlet group B15, the vertical cylinder 23, the air outlet group B13, the air collection hood B02, and the air inlet pipe 34 are connected in sequence to form another air intake structure.

[0059] Specifically, external air is drawn into the air collection hood A01 through the air inlet 011, flows into the vertical cylinder 23 through the air inlet group B15, and forms a vertically upward airflow within the vertical cylinder 23. Finally, it flows into the air inlet pipe 34 through the air outlet group B13 and the air collection hood B02. This airflow is not heated before passing through the electric heating grid 33 and is a cold airflow, which can cool the dried fertilizer in the vertical cylinder 23. In addition, when this cooling airflow passes through the vertical cylinder 23, it can blow the dried fertilizer upward, causing the fertilizer to float irregularly within the vertical cylinder 23, avoiding excessive accumulation and improving the cooling efficiency of the fertilizer.

[0060] Secondly, after cooling the fertilizer, the cooling airflow absorbs heat through heat exchange with the high-temperature fertilizer, forming a hot airflow with a certain temperature. This hot airflow eventually flows into the air inlet tank 31 to be heated and reused, thus reducing energy consumption.

[0061] In addition, filters are installed in the air inlet 011 and branch pipe 341 to filter impurities in the outside air and prevent them from mixing into the fertilizer and causing excessive pollution. Example 4

[0062] Please see Figure 4 The difference between this embodiment and Embodiment 3 is as follows:

[0063] Each vertical cylinder 23 has an upper perforated plate 24 fixed to its top end and a lower perforated plate 25 fixed to its bottom end. Specifically, the top ends of the vertical cylinders 23 are inserted into the holes on the upper perforated plate 24, and the bottom ends are inserted into the holes on the lower perforated plate 25.

[0064] In addition, the top of the vertical cylinder 23 is flush with the upper surface of the upper perforated plate 24 and is tightly and movable against the inner top wall of the tank 1, and the bottom of the vertical cylinder 23 is flush with the lower surface of the lower perforated plate 25 and is tightly and movable against the inner bottom wall of the tank 1.

[0065] During the movement of the vertical cylinder 23 along the circumferential path, when the vertical cylinder 23 does not overlap with the feed inlet 11, the air outlet group A12, and the air outlet group B13, the upper perforated plate 24 can block the feed inlet 11, the air outlet group A12, and the air outlet group B13 respectively. When the vertical cylinder 23 does not overlap with the air inlet group A14, the air inlet group B15, and the discharge port 16, the lower perforated plate 25 can block the air inlet group A14, the air inlet group B15, and the discharge port 16 respectively, to avoid material leakage and large-scale gas leakage, and to ensure the overall stability of the equipment operation. In addition, the upper perforated plate 24 and the lower perforated plate 25 fix the two ends of each vertical cylinder 23 into a whole, which plays a role in structural reinforcement of the conveying mechanism 2, achieving two goals at once. Example 5

[0066] Please see Figure 1 , Figure 8 and Figure 10 The difference between this embodiment and embodiment 4 is that:

[0067] A feed hopper 5 is fixed to the top of the tank body 1. The bottom of the feed hopper 5 is connected to the feed inlet 11. The feed hopper 5 is funnel-shaped and gradually narrows downwards. After fertilizer is put into the feed hopper 5, when the vertical cylinder 23 is aligned with the feed inlet 11, the fertilizer in the feed hopper 5 falls from the feed inlet 11 into the vertical cylinder 23. Furthermore, if... Figure 11 As shown, an annular outer cover 6 is fixed on the outer wall of the feed hopper 5. The cross-section of the outer cover 6 is L-shaped. An annular dust collection chamber 61 is formed between the inner wall of the outer cover 6 and the outer wall of the feed hopper 5. A dust collection pipe 62 communicating with the annular dust collection chamber 61 is connected to the outer wall of the outer cover 6. The end of the dust collection pipe 62 is connected to the main exhaust pipe 41.

[0068] When the exhaust fan 42 operates to expel the gas inside the main exhaust pipe 41, a negative pressure is generated inside the main exhaust pipe 41. External air flows into the annular dust collection chamber 61 through the top of the outer cover 6, and then into the main exhaust pipe 41 through the dust collection pipe 62 to maintain pressure balance. This airflow forms a circumferential wind wall at the top of the feed hopper 5, which can intercept and remove the dust that is scattered when fertilizer is added, further achieving the dust reduction effect. The dust flows into the exhaust gas treatment device through the main exhaust pipe 41 for further filtration.

[0069] Among them, such as Figure 11 As shown, the top of the outer cover 6 is set higher than the top of the feed hopper 5. The slightly raised design of the top of the outer cover 6 can improve the dust interception effect and reduce dust escape. In addition, an annular interception net 63 is fixed between the top of the outer cover 6 and the top of the feed hopper 5. The annular interception net 63 is inclined towards the center of the feed hopper 5 in order to intercept the splashed fertilizer and prevent it from falling into the annular dust collection chamber 61. At the same time, the inclined annular interception net 63 can guide the fertilizer that falls on it into the feed hopper 5. Example 6

[0070] Please see Figure 10 , Figure 12 and Figure 13 The difference between this embodiment and embodiment 5 is as follows:

[0071] The bottom of the feed hopper 5 is also provided with an anti-bridging mechanism 7, which is used to move the fertilizer at the bottom of the feed hopper 5 to prevent bridging. Specifically, the anti-bridging mechanism 7 includes a guide rod 71, a movable rod 74 and a cross-shaped pushing component 77. The side wall at the bottom of the feed hopper 5 is provided with a horizontally penetrating sliding hole 701. The guide rod 71 is slidably installed in the sliding hole 701. The inner wall at the bottom of the feed hopper 5 and the side opposite to the sliding hole 701 is vertically fixed with a sliding rod 72. Two sliding seats 73 are slidably fitted on the sliding rod 72.

[0072] Two movable rods 74 are hinged to the end of the guide rod 71 located inside the feed hopper 5. The two movable rods 74 are arranged in a horizontal V-shape. The other ends of the two movable rods 74 are hinged to the two sliding seats 73 one by one. A cross-shaped pusher 77 is fixedly mounted on the central shaft 21. A roller 78 is rotatably mounted on the outer end of the guide rod 71. The roller 78 is pressed and abutted against the outer edge of the cross-shaped pusher 77. The cross-shaped pusher 77 is used to periodically push the guide rod 71 to move.

[0073] A fixed plate 75 is fixedly mounted on the guide rod 71, and a spring 76 is mounted on the guide rod 71. One end of the spring 76 is fixed to the fixed plate 75, and the other end is fixed to the outer wall of the feed hopper 5.

[0074] The cross-shaped pusher 77 has four protrusions and four concave parts on its periphery, and the protrusions and concave parts are arranged alternately, which makes the outer edge wall of the cross-shaped pusher 77 undulate. The protrusions and concave parts are both arc transitions, which ensures a smoother and more stable process of contact and compression with the roller 78.

[0075] As the cross-shaped pusher 77 rotates with the central shaft 21, it periodically pushes the guide rod 71 into the depth of the feed hopper 5 under the action of contact and compression with the roller 78. When the guide rod 71 extends into the feed hopper 5, the spring 76 is compressed and elastically stores force. When the roller 78 rolls to the concave part, the guide rod 71 is pushed outward and reset under the action of the spring 76, thereby causing the guide rod 71 to move horizontally upward and back again.

[0076] With the sliding engagement of the sliding seat 73 and the sliding rod 72, and the limiting effect of the movable rod 74 being hinged to the guide rod 71 and the sliding seat 73 respectively, when the guide rod 71 extends and moves towards the feed hopper 5, it can push the two movable rods 74 to swing up and down respectively, increasing the included angle. When the guide rod 71 slides outward to reset, the two movable rods 74 swing in an angle-reducing manner. In this way, a continuously dynamically changing unblocking structure can be formed at the bottom inner diameter of the feed hopper 5 to continuously move the fertilizer, reduce fertilizer bridging, and ensure the smoothness of fertilizer delivery.

[0077] In addition, the two movable rods 74 are arranged in a figure-eight shape. When the guide rod 71 reciprocates, the two movable rods 74 swing at varying angles. This process allows the movable rods 74 to move vertically, covering the entire small diameter at the bottom of the feed hopper 5, thus achieving a good anti-clogging effect.

[0078] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0079] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention.

Claims

1. A continuous conveying device for drying nitrogen and potassium fertilizer, comprising a tank (1), characterized in that: The tank (1) is provided with a conveying mechanism (2) for conveying fertilizer along a circumferential path. The conveying mechanism (2) includes several vertically penetrating vertical cylinders (23), which are evenly arranged in a ring around the axis of the tank (1) inside the tank (1). The conveying mechanism (2) also includes a central shaft (21), an upper perforated plate (24), a lower perforated plate (25), and a drive device (26). The central shaft (21) is vertically and rotatably mounted on the inner bottom wall of the tank (1) and extends through to the top of the tank (1); Each of the vertical cylinders (23) is fixed to the periphery of the central shaft (21) by a fixing arm (22); The driving device (26) is located on the top of the tank (1) and is used to drive the central shaft (21) to rotate so as to drive each of the vertical cylinders (23) to move along the circumferential path; The tank (1) has an inlet (11) on the top of the circumferential path and an outlet (16) on the bottom of the circumferential path, and the two are arranged in a staggered manner.

2. The continuous conveying device for drying nitrogen and potassium fertilizer according to claim 1, characterized in that: Each of the vertical cylinders (23) has an upper perforated plate (24) fixed to its top end and a lower perforated plate (25) fixed to its bottom end. The top of the vertical cylinder (23) is flush with the upper surface of the upper perforated plate (24), and both are in close and movable contact with the inner top wall of the tank (1); The bottom end of the vertical cylinder (23) is flush with the lower surface of the lower perforated plate (25), and both are in close contact with the inner bottom wall of the tank (1).

3. The continuous conveying device for drying nitrogen and potassium fertilizer according to claim 1, characterized in that: The top of the tank (1) is also fixed with a feed hopper (5), and the bottom of the feed hopper (5) is connected to the feed inlet (11); The feed hopper (5) is funnel-shaped and gradually narrows downwards.

4. The continuous conveying device for drying nitrogen and potassium fertilizer according to claim 3, characterized in that: The bottom of the feed hopper (5) is also provided with an anti-bridging mechanism (7) to move the fertilizer at the bottom of the feed hopper (5) to prevent bridging; The anti-bridging mechanism (7) includes a guide rod (71) and a cross-shaped pusher (77). The feed hopper (5) has a horizontally penetrating sliding hole (701) on its side wall at the bottom, and the guide rod (71) is slidably installed in the sliding hole (701). The cross-shaped pusher (77) is fixedly mounted on the central shaft (21), and a roller (78) is rotatably mounted on the outer end of the guide rod (71). The roller (78) is pressed and abutted against the outer edge wall of the cross-shaped pusher (77). The cross-shaped pusher (77) is used to periodically push the guide rod (71) to translate; A fixed plate (75) is fixedly mounted on the guide rod (71), and a spring (76) is mounted on the guide rod (71). One end of the spring (76) is fixed to the fixed plate (75), and the other end is fixed to the outer wall of the feed hopper (5).

5. The continuous conveying device for drying nitrogen and potassium fertilizer according to claim 4, characterized in that: A slide rod (72) is vertically fixed on the inner wall at the bottom of the feed hopper (5) and on the side opposite to the slide hole (701). Two slide seats (73) are slidably fitted on the slide rod (72). The guide rod (71) has two movable rods (74) hinged to its end inside the feed hopper (5), and the two movable rods (74) are arranged in a horizontal figure-eight shape. The other ends of the two movable rods (74) are hinged to the two sliding seats (73) in a one-to-one correspondence.

6. The continuous conveying device for drying nitrogen and potassium fertilizer according to claim 1, characterized in that: The drive device (26) includes a drive motor (262), a main gear (263), and a driven gear (264). The driven gear (264) is fixed to the top of the central shaft (21); The drive motor (262) is fixed to the top of the tank (1) by a bracket (261); The main gear (263) is fixed on the output shaft of the drive motor (262) and meshes with the driven gear (264).

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