Compound fertilizer granulating and coating device

Abstract

The utility model discloses a compound fertilizer granulating and coating device which comprises a granulating mechanism, a coating mechanism and a chain plate type elevator, chemical fertilizer particles compressed by the granulation mechanism are conveyed into the coating mechanism through the chain plate type elevator; the granulation mechanism can continuously rotate and extrude the powder compound fertilizer into chemical fertilizer granules; chemical fertilizer particles are fed into the film coating barrel through the chain plate type elevator, and the film coating barrel, a stirring rod, a stirring rod driving motor and an injection pipe are arranged in the film coating mechanism; the injection pipe can inject the coating material on the chemical fertilizer particles; the stirring rod driving motor drives the stirring rod to rotate in the coating barrel; solidifying and forming in a film coating mechanism; according to the technical scheme, the automation degree is high, continuous granulation and coating can be achieved, and the production efficiency is high.

Description

Technical Field

[0001] This utility model belongs to the technical field of fertilizer production equipment, specifically relating to a compound fertilizer granulation and coating device. Background Technology

[0002] Agricultural fertilizers are essential materials in agricultural planting, playing a vital role in promoting crop growth and improving the yield and quality of agricultural products. Agricultural fertilizers include liquid fertilizers, powdered compound fertilizers, and slow-release compound fertilizers. Slow-release compound fertilizers are made by compressing powdered compound fertilizers into granules and then coating them with a slow-release layer. Slow-release compound fertilizers can slowly release elements into the soil according to the crop's nutrient requirements at different stages, allowing the crop to receive different nutritional supplements at different growth stages, thereby reducing the number of fertilizations and fertilizer leaching losses.

[0003] Currently, slow-release compound fertilizers are made by granulating fertilizer powder using disc granulation equipment or rotary drum granulation equipment, and then coating it after granulation. This process is not convenient for continuous processing, making the entire granulation and coating equipment complex, bulky, and reducing production efficiency. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned problems and to provide a compound fertilizer granulation and coating device.

[0005] A compound fertilizer granulation and coating device includes: a granulation mechanism, a coating mechanism, and a chain plate elevator; the fertilizer granules compressed by the granulation mechanism are conveyed to the coating mechanism via the chain plate elevator.

[0006] The granulation mechanism includes: a granulator frame, a collection cylinder, a granulation cylinder, a pressure roller, a scraper strip, and a pressure roller drive motor; the granulation cylinder is sleeved in the collection cylinder; the collection cylinder is fixed on the granulator frame; the granulation cylinder is provided with multiple extrusion molding holes; the pressure roller drive motor can synchronously drive the pressure roller and the scraper strip to rotate inside and outside the granulation cylinder;

[0007] The coating mechanism includes: a coating cylinder frame, a coating cylinder, a stirring rod, a stirring rod drive motor, a spray pipe, a protective cover, a spray material tank, a spray material pump, and a conveying pipe; the coating cylinder is fixed on the coating cylinder frame; one end of the protective cover and the spray pipe is fixed above the coating cylinder; the stirring rod is axially connected to the coating cylinder; the stirring rod drive motor is fixed at the lower end of the coating cylinder; the rotating shaft of the stirring rod drive motor is driven by the stirring rod; the other end of the spray pipe is provided with a spray pipe nozzle; the spray material tank is connected to the spray pipe nozzle pipeline through the conveying pipe; the conveying pipe is provided with a spray material pump; the spray material pump conveys the coating material in the spray material tank to the spray pipe;

[0008] Fertilizer powder enters the granulation cylinder, the pressure roller extrudes the fertilizer powder from the extrusion molding hole, and the scraper strip cuts the compressed fertilizer granules into segments; the fertilizer granules are fed into the coating cylinder by the chain plate elevator; the injection pipe nozzle injects coating material into the coating cylinder.

[0009] The lower end of the pellet collecting cylinder is a conical pellet collecting section, and a shaft through hole is provided in the middle of the lower end of the pellet collecting cylinder; a pellet outlet is provided on one side of the discharge pipe; an annular connecting frame is provided at the upper end of the pelleting cylinder, and a scraper groove is provided below the outer edge of the annular connecting frame; the lower end of the pelleting cylinder is a conical pelleting section, and the taper of the conical pelleting section is the same as the taper of the conical pellet collecting section; multiple extrusion forming holes are provided on the conical pelleting section; the diameter of the multiple extrusion forming holes is the same; an inner cylinder shaft connecting hole is provided at the lower end of the pelleting cylinder; the inner cylinder shaft connecting hole can coincide with the axis of the shaft through hole.

[0010] The granulation cylinder is equipped with an extrusion assembly, which includes a roller frame, a top support spring, and an adjusting nut. Below the roller frame is a connecting shaft consisting of a multi-faceted sleeve, a smooth shaft, and a threaded rod. The smooth shaft is coaxially connected to the inner cylinder shaft connection hole and the shaft through hole. The top support spring is sleeved on the smooth shaft. The upper end of the top support spring supports below the cylinder shaft connection hole, and the lower end of the top support spring supports above the shaft through hole. The lower end of the roller frame connecting shaft is equipped with a threaded rod, and the adjusting nut is screwed onto the threaded rod. The upper end of the adjusting nut supports below the shaft through hole. Three pressure rollers are shaft-connected to the roller frame, and the three pressure rollers are arranged in a circular, equidistant array.

[0011] The lower end of the granulation scraper frame is provided with a scraper frame sleeve ring, which has a multi-faceted opening that fits onto the multi-faceted sleeve part below the rolling frame; the scraper frame sleeve ring is interference-fitted with the lower part of the rolling frame; the scraper frame sleeve ring is provided with three scraper strips, and the upper ends of the three scraper strips are all axially connected to scraper rollers; the pressure roller drive motor drives the three scraper strips on the granulation scraper frame to rotate along the outer wall of the conical granulation part; the scraper rollers roll in the scraper groove.

[0012] The granulator cover is fixed to the upper end of the annular docking frame; the pressure roller drive motor is fixed at the center of the upper end of the granulator cover, and the granulator feed hopper is provided next to the pressure roller drive motor; the rotating shaft of the pressure roller drive motor is provided with a sleeve buckle, which can be connected with the docking bayonet; the pressure roller drive motor drives the rolling frame to rotate in the granulation cylinder.

[0013] The protective cover has a coating cylinder feed hopper on one side; the chain plate elevator has an elevator feed port at one end and an elevator discharge port at the other end; the elevator feed port corresponds to the particle discharge pipe; the elevator discharge port corresponds to the coating cylinder feed hopper.

[0014] This technical solution provides a compound fertilizer granulation and coating device, which includes: a granulation mechanism, a coating mechanism, and a chain plate elevator; the fertilizer granules compressed by the granulation mechanism are conveyed to the coating mechanism via the chain plate elevator; the granulation mechanism can continuously rotary extrude powdered compound fertilizer into fertilizer granules; the fertilizer granules are fed into the coating cylinder via the chain plate elevator; the coating mechanism is equipped with a coating cylinder, a stirring rod, a stirring rod drive motor, and a spray pipe; the spray pipe can spray the coating material onto the fertilizer granules; the stirring rod drive motor drives the stirring rod to rotate in the coating cylinder; and the granules solidify and form in the coating mechanism; this technical solution has a high degree of automation, can continuously granulate and coat, and has high production efficiency. Attached Figure Description

[0015] Figure 1 This is an overall schematic diagram of a compound fertilizer granulation and coating device according to the present invention;

[0016] Figure 2 This is a schematic diagram of the granulation mechanism of a compound fertilizer granulation and coating device according to this utility model;

[0017] Figure 3 This is a cross-sectional view of the granulation mechanism of a compound fertilizer granulation and coating device according to this utility model;

[0018] Figure 4 This is a partial enlarged view of the granulation mechanism of a compound fertilizer granulation and coating device according to this utility model;

[0019] Figure 5 This is a schematic diagram of the granulation scraper of a compound fertilizer granulation and coating device according to this utility model;

[0020] Figure 6 This is a schematic diagram of the coating mechanism of a compound fertilizer granulation and coating device according to this utility model;

[0021] Figure 7 This is a cross-sectional view of the coating mechanism of a compound fertilizer granulation and coating device according to this utility model;

[0022] Reference numerals: 1. Granulating mechanism; 11. Granulator frame; 12. Granulator collecting cylinder; 121. Annular connecting frame; 122. Conical granulating section; 123. Shaft through hole; 124. Granulation outlet; 13. Granulator cylinder; 131. Annular connecting frame; 132. Scraper groove; 133. Conical granulating section; 134. Extrusion forming hole; 135. Extrusion forming hole; 141. Roller frame; 1411. Connecting bayonet; 142. Pressure roller; 143. Top support spring; 144. Adjusting nut; 15. Granulator top cover; 151. Granulator feed hopper; 152. First feed valve; 16. Granulating scraper frame; 161. Scraper. 162. Scraper bar; 17. Pressure roller drive motor; 171. Socket buckle; 2. Coating mechanism; 21. Coating cylinder frame; 22. Coating cylinder; 221. Coating cylinder connecting edge; 223. Discharge pipe; 224. Butterfly valve; 23. Stirring rod; 24. Stirring rod drive motor; 25. Injection pipe; 252. Connecting pipe interface; 253. Injection pipe fixing frame; 26. Protective cover; 26. Coating cylinder feed hopper; 261. Coating cylinder feed hopper; 262. Second feed valve; 27. Spray tank; 29. ​​Conveying pipe; 3. Chain plate elevator; 31. Elevator drive motor; 32. Elevator feed port. Detailed Implementation

[0023] The technical solution will be further described clearly and completely below with reference to the accompanying drawings. The described embodiments are only a part of the technical solution, not all of the embodiments. All other embodiments obtained by those skilled in the art based on this technical solution without creative effort are within the scope of protection of this utility model.

[0024] Example 1

[0025] See Figures 1 to 7 As shown, a compound fertilizer granulation and coating device includes: a granulation mechanism 1, a coating mechanism 2, and a chain plate elevator 3;

[0026] The granulation mechanism 1 includes: a granulator frame 11, a granulation cylinder 12, a granulation cylinder 13, an extrusion assembly, a granulator cover 15, a granulation scraper frame 16, and a pressure roller drive motor 17.

[0027] The pellet collecting cylinder 12 is fixed on the granulator frame 11; the upper end of the pellet collecting cylinder 12 is provided with an annular connecting frame 121; the lower end of the pellet collecting cylinder 12 is a conical pellet collecting part 122, and the middle part of the lower end of the pellet collecting cylinder 12 is provided with a shaft through hole 123, and a pellet outlet 124 is provided on one side of the shaft through hole 123.

[0028] The granulation cylinder 13 has an annular docking frame 131 at its upper end, and a scraper groove 132 is provided below the outer edge of the annular docking frame 131. The lower end of the granulation cylinder 13 is a conical granulation section 133, and the taper of the conical granulation section 133 is the same as the taper of the conical granulation section 122. The conical granulation section 133 is provided with a plurality of extrusion forming holes 134. The plurality of extrusion forming holes 134 have the same diameter. The lower end of the granulation cylinder 13 is provided with an inner cylinder shaft connecting hole. The inner cylinder shaft connecting hole can coincide with the axis of the shaft through hole 123.

[0029] The diameter of the extrusion forming hole 135 is 3-4 mm;

[0030] The extrusion assembly includes: a roller frame 141, a pressure roller 142, a top support spring 143, and an adjusting nut 144;

[0031] The roller forming frame 141 is provided with a docking slot 1411 above it; a stepped connecting shaft is provided below the roller forming frame 141. The stepped connecting shaft is divided into a multi-faceted sleeve part, a smooth shaft, and a threaded rod. The smooth shaft is coaxially connected to the inner cylinder shaft through hole and the shaft through hole 123. A top support spring 143 is sleeved on the smooth shaft. The upper end of the top support spring 143 supports the area below the cylinder shaft through hole, and the lower end of the top support spring 143 supports the shaft through hole 123. Above 23; the lower end of the roller frame connecting shaft is provided with a threaded rod, and the adjusting nut 144 is screwed onto the threaded rod. The upper end of the adjusting nut 144 supports the shaft through hole 123 below; three pressure rollers 142 are shaft-connected to the roller frame 141. The outer diameter of the three pressure rollers 142 is made of rubber. The three pressure rollers 142 are arranged in a ring at equal intervals; the adjusting nut 144 adjusts the tightness of the fit between the pressure rollers 142 and the inner wall of the conical granulation part 133;

[0032] The granulator cover 15 is fixed to the upper end of the annular docking frame 131; the pressure roller drive motor 17 is fixed at the center of the upper end of the granulator cover 15, and the shaft of the pressure roller drive motor 17 is provided with a sleeve buckle 171, which can dock with the docking slot 1411; the pressure roller drive motor 17 drives three pressure rollers 142 to rotate and roll on the inner wall of the conical granulation section 133;

[0033] A granulator feed hopper 151 is provided next to the pressure roller drive motor 17. The lower part of the granulator feed hopper 151 is connected to the lower part of the granulator cover 15 through a connecting pipe. A first feed valve 152 is provided below the granulator feed hopper 151. The first feed valve 152 adjusts the amount of material in the granulator feed hopper 151 entering the granulation cylinder 13.

[0034] Fertilizer powder enters the granulation cylinder 13 through the granulator feed hopper 151;

[0035] The granulation scraper frame 16 has a scraper frame sleeve ring 161 at its lower end. The scraper frame sleeve ring 161 has a multi-faceted opening, which is fitted onto the multi-faceted sleeve part below the rolling frame 141. The scraper frame sleeve ring 161 is interference-fitted with the lower part of the rolling frame 141. The scraper frame sleeve ring 161 has three scraper strips 162, and each of the three scraper strips 162 has a scraper roller 153 axially connected to its upper end. The pressure roller drive motor 17 drives the three scraper strips 162 on the granulation scraper frame 16 to rotate along the outer wall of the conical granulation part 133. The scraper roller 153 rolls in the scraper groove 132.

[0036] The three scraper strips 162 and the three pressure rollers 142 are arranged alternately.

[0037] The coating mechanism 2 includes: a coating cylinder frame 21, a coating cylinder 22, a stirring rod 23, a stirring rod drive motor 24, a spray pipe 25, a protective cover 26, a spray tank 27, a spray pump, and a conveying pipe 29;

[0038] The coating cylinder 22 is fixed on the coating cylinder frame 21; the upper end of the coating cylinder 22 is provided with a coating cylinder connection port 221; the middle of the bottom end of the coating cylinder 22 is provided with a stirring rod shaft connection hole, and the lower end of the stirring rod 23 is shaft-connected in the stirring rod shaft connection hole; the stirring rod drive motor 24 is fixed at the lower end of the coating cylinder 22; the rotating shaft of the stirring rod drive motor 24 is drivenly connected to the stirring rod 23; a discharge pipe 223 is provided on one side of the lower end of the coating cylinder 22, and a butterfly valve 224 is provided on the discharge pipe 223;

[0039] One end of the injection pipe 25 is provided with an injection pipe nozzle, which corresponds to the inside of the coating cylinder 22; the other end of the injection pipe 25 is provided with a connecting pipe interface 252; the connecting pipe interface 252 is fixed to the connecting edge 221 of the coating cylinder by an injection pipe fixing bracket 253.

[0040] The protective cover 26 is fixed below the edge of the coating cylinder connection 221; a coating cylinder feed hopper 261 is provided on one side of the protective cover 26, and a second feed valve 262 is provided at the lower end of the coating cylinder feed hopper 261. The second feed valve 262 adjusts the amount of fertilizer granules entering the coating cylinder 22.

[0041] The spray can 27 is connected to the connecting pipe interface 252 via the conveying pipe 29; the conveying pipe 29 is equipped with a spray pump; the spray pump conveys the coating material in the spray can 27 to the spray pipe 25 and then sprays it out from the nozzle of the spray pipe.

[0042] The coating material in the spray can 27 can be selected from: plastic, resin, paraffin, polyethylene, or elemental sulfur;

[0043] Depending on the characteristics of different coating materials, a heating device can be added to the conveying pipe 29 to heat the coating material, making it more fluid and improving the coating effect on fertilizer granules.

[0044] The granulation outlet 124 and the coating cylinder feed hopper 261 are connected by a chain plate elevator 3;

[0045] The chain plate elevator 3 is equipped with a lifting drive motor 31. One end of the chain plate elevator 3 has an elevator inlet 32; the other end of the chain plate elevator 3 has an elevator outlet; the elevator inlet 32 ​​corresponds to the granulation pipe outlet 124; the elevator outlet corresponds to the coating cylinder feed hopper 261; the fertilizer granules compressed by the granulation mechanism 1 are transported to the coating mechanism 2 through the chain plate elevator 3.

[0046] Work style:

[0047] First, the powdered compound fertilizer is poured into the feed hopper 151 of the granulator; the powdered compound fertilizer enters the granulation cylinder 13 from the feed hopper 151; the granulation cylinder 13 is provided with multiple extrusion molding holes 134, the pressure roller 142 extrudes the powdered compound fertilizer from the extrusion molding holes 134, and the scraper strip 162 cuts the extruded and compressed powdered compound fertilizer into fertilizer granules on the outer end face of the extrusion molding holes 134; the fertilizer granules are sent into the coating mechanism 2 through the chain plate elevator 3; while the stirring rod 23 in the coating mechanism 2 slowly stirs the fertilizer granules, the spray nozzle sprays the coating material into the fertilizer granules; after the coating material is wrapped and naturally cured, it is discharged from the discharge pipe 223.

[0048] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A compound fertilizer granulation and coating device, comprising: Granulation mechanism, coating mechanism, chain plate elevator; The fertilizer granules compressed by the granulation unit are conveyed to the coating unit via a chain conveyor. Its features are: The granulation mechanism includes: a granulator frame, a collection cylinder, a granulation cylinder, a pressure roller, a scraper strip, and a pressure roller drive motor; the granulation cylinder is sleeved in the collection cylinder; the collection cylinder is fixed on the granulator frame; the granulation cylinder is provided with multiple extrusion molding holes; the pressure roller drive motor can synchronously drive the pressure roller and the scraper strip to rotate inside and outside the granulation cylinder; The coating mechanism includes: a coating cylinder frame, a coating cylinder, a stirring rod, a stirring rod drive motor, a spray pipe, a protective cover, a spray material tank, a spray material pump, and a conveying pipe; the coating cylinder is fixed on the coating cylinder frame; one end of the protective cover and the spray pipe is fixed above the coating cylinder; the stirring rod is axially connected to the coating cylinder; the stirring rod drive motor is fixed at the lower end of the coating cylinder; the rotating shaft of the stirring rod drive motor is driven by the stirring rod; the other end of the spray pipe is provided with a spray pipe nozzle; the spray material tank is connected to the spray pipe nozzle pipeline through the conveying pipe; the conveying pipe is provided with a spray material pump; the spray material pump conveys the coating material in the spray material tank to the spray pipe; Fertilizer powder enters the granulation cylinder, the pressure roller extrudes the fertilizer powder from the extrusion molding hole, and the scraper strip cuts the compressed fertilizer granules into segments; the fertilizer granules are fed into the coating cylinder by the chain plate elevator; the injection pipe nozzle injects coating material into the coating cylinder.

2. The compound fertilizer granulation and coating device according to claim 1, characterized in that: The lower end of the pellet collecting cylinder is a conical pellet collecting section, and a shaft through hole is provided in the middle of the lower end of the pellet collecting cylinder; a pellet outlet is provided on one side of the discharge pipe; an annular connecting frame is provided at the upper end of the pelleting cylinder, and a scraper groove is provided below the outer edge of the annular connecting frame; the lower end of the pelleting cylinder is a conical pelleting section, and the taper of the conical pelleting section is the same as the taper of the conical pellet collecting section; multiple extrusion forming holes are provided on the conical pelleting section; the diameter of the multiple extrusion forming holes is the same; an inner cylinder shaft connecting hole is provided at the lower end of the pelleting cylinder; the inner cylinder shaft connecting hole can coincide with the axis of the shaft through hole.

3. The compound fertilizer granulation and coating device according to claim 2, characterized in that: The granulation cylinder is equipped with an extrusion assembly, which includes a roller frame, a top support spring, and an adjusting nut. Below the roller frame is a connecting shaft consisting of a multi-faceted sleeve, a smooth shaft, and a threaded rod. The smooth shaft is coaxially connected to the inner cylinder shaft connection hole and the shaft through hole. The top support spring is sleeved on the smooth shaft. The upper end of the top support spring supports below the cylinder shaft connection hole, and the lower end of the top support spring supports above the shaft through hole. The lower end of the roller frame connecting shaft is equipped with a threaded rod, and the adjusting nut is screwed onto the threaded rod. The upper end of the adjusting nut supports below the shaft through hole. Three pressure rollers are shaft-connected to the roller frame, and the three pressure rollers are arranged in a circular, equidistant array.

4. The compound fertilizer granulation and coating device according to claim 3, characterized in that: The lower end of the granulation scraper frame is provided with a scraper frame sleeve ring, which has a multi-faceted opening that fits onto the multi-faceted sleeve part below the rolling frame; the scraper frame sleeve ring is interference-fitted with the lower part of the rolling frame; the scraper frame sleeve ring is provided with three scraper strips, and the upper ends of the three scraper strips are all axially connected to scraper rollers; the pressure roller drive motor drives the three scraper strips on the granulation scraper frame to rotate along the outer wall of the conical granulation part; the scraper rollers roll in the scraper groove.

5. The compound fertilizer granulation and coating device according to claim 4, characterized in that: The granulator cover is fixed to the upper end of the annular docking frame; the pressure roller drive motor is fixed at the center of the upper end of the granulator cover, and the granulator feed hopper is provided next to the pressure roller drive motor; the rotating shaft of the pressure roller drive motor is provided with a sleeve buckle, which can be connected with the docking bayonet; the pressure roller drive motor drives the rolling frame to rotate in the granulation cylinder.

6. The compound fertilizer granulation and coating device according to claim 5, characterized in that: The protective cover has a coating cylinder feed hopper on one side; the chain plate elevator has an elevator feed port at one end and an elevator discharge port at the other end; the elevator feed port corresponds to the particle discharge pipe; the elevator discharge port corresponds to the coating cylinder feed hopper.

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