A slow-release fertilizer coating device for greenhouse vegetables

Abstract

This utility model provides a slow-release fertilizer coating device for greenhouse vegetables, relating to the field of slow-release fertilizer coating technology for vegetables. It includes: a coating roller; a large gear mounted on the left side of the coating roller via a connecting column; a small gear meshing with the lower end of the large gear; a roller motor connected to the left side of the small gear via a drive shaft; a central shaft disposed inside the coating roller; the left and right sides of the central shaft being fixedly mounted to a left support frame and a right support frame respectively via fixed shaft seats; the fixed shaft seats being connected through bearings at the left and right sides of the coating roller; and a stirring blade and a spray head alternately mounted on the lower end of the central shaft. The spray head is connected to a coating agent delivery pipe via a delivery pipe. This utility model solves the problem in the prior art where fertilizer particles easily accumulate inside the rotating roller, making it difficult to evenly and fully spray the coating agent onto the fertilizer surface.

Description

Technical Field

[0001] This utility model relates to the field of slow-release fertilizer coating technology for vegetables, specifically to a slow-release fertilizer coating device for greenhouse vegetables. Background Technology

[0002] In the production process of coated slow-release fertilizers, fertilizer granules need to be coated with a semi-permeable or biodegradable film to control the release rate of fertilizer nutrients and match it with the growth cycle of greenhouse vegetables. A search revealed an existing technology (publication number: CN202122340850.4) for a slow-release fertilizer coating device, which describes that "the slow-release fertilizer coating device also includes a steam spray pipe, the discharge end of which extends into the chamber of the drum, and the feed end of which extends outside the drum. The steam spray pipe is used to spray the coating agent, for example, it can be a spray gun." However, the existing technology suffers from the problem that fertilizer granules tend to accumulate inside the rotating drum, making it difficult to spray the coating agent evenly and fully onto the fertilizer surface. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, a slow-release fertilizer coating device for greenhouse vegetables is provided to solve the problem that fertilizer particles tend to accumulate inside the rotating drum in existing technologies, making it difficult to spray the coating agent evenly and fully onto the fertilizer surface.

[0004] To achieve the above objectives, a slow-release fertilizer coating device for greenhouse vegetables is provided, comprising: a coating roller, wherein a left support frame and a right support frame are movably connected to the left and right ends of the coating roller via connecting cylinders. A large gear is installed on the left side of the coating roller via a connecting column. A small gear is meshed with the lower end of the large gear. A roller motor is connected to the left side of the small gear via a drive shaft. A central shaft is provided inside the coating roller. The left and right sides of the central shaft are respectively fixed to the left and right support frames via fixed shaft seats. The fixed shaft seats are located on the left and right sides of the coating roller via bearings. A stirring blade and a spray head are alternately installed on the lower end of the central shaft. The spray head is connected to a coating agent delivery pipe via an infusion pipe.

[0005] Furthermore, a material guide groove is provided on the upper end face of the coating roller, and a material blocking cover is sealed and fastened at the material guide groove. Connecting cylinder columns are welded to both the left and right sides of the coating roller.

[0006] Furthermore, an infrared locator is installed on the outer wall of the right side of the coating roller, and two sets of receivers are installed on the surface of the right support frame.

[0007] Furthermore, an electric heater is installed inside the coating roller wall, a roller motor is fixed on the left end face of the left support frame, and a coating agent delivery pipe is distributed on the upper end of the roller motor.

[0008] Furthermore, an infusion tube is installed through the inner side of the central shaft, and the lower end of the infusion tube is connected to the spray head through a branch pipe.

[0009] Furthermore, fixing blocks are welded to the left and right sides of the central shaft; and the fixing blocks are inserted into the groove surface of the fixing shaft seat, and the fixing shaft seat is screwed to the fixing blocks by fastening bolts.

[0010] Furthermore, the spray heads are equidistantly installed on the axial surface directly below the central shaft, and the stirring blades are distributed around the spray heads on their sides.

[0011] The beneficial effects of this utility model are as follows: The slow-release fertilizer coating device for greenhouse vegetables utilizes a fixed central shaft inside the coating roller, which does not rotate with the roller. Through the staggered distribution of stirring blades and spray heads integrated on the surface of the central shaft, the fixed stirring blades can break up fertilizer granule clusters that may be stuck together. The spray heads directly spray the coating agent onto the fertilizer granule group that has been broken up and fully diffused by the stirring blades. This effectively increases the contact opportunity and uniformity between fertilizer granules and spray droplets, making it easier for the coating agent to be delivered directly to the area where fertilizer mixing is most intense. This allows the coating agent to more evenly and fully coat the fertilizer surface, improving the coating uniformity and integrity of the slow-release fertilizer coating device. Attached Figure Description

[0012] Figure 1 This is a front view structural schematic diagram of the slow-release fertilizer coating device for greenhouse vegetables according to an embodiment of the present invention.

[0013] Figure 2 This is a front view cross-sectional structural diagram of the slow-release fertilizer coating device for greenhouse vegetables according to an embodiment of the present invention.

[0014] Figure 3 This is a side view cross-sectional structural diagram of the coating roller according to an embodiment of the present invention.

[0015] Figure 4 This is a side view cross-sectional structural diagram of the central axis of this utility model embodiment.

[0016] In the diagram: 1. Coating roller; 11. Blocking cover plate; 12. Guide trough; 13. Infrared positioner; 14. Connecting cylinder column; 15. Electric heater; 2. Left support frame; 21. Right support frame; 22. Receiver; 3. Roller motor; 31. Large gear; 32. Small gear; 33. Drive shaft; 4. Coating agent delivery pipe; 5. Central shaft; 51. Infusion pipe; 52. Stirring blade; 53. Spray head; 54. Fixed shaft seat; 55. Fixing block; 56. Fastening bolt. Detailed Implementation

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

[0018] Reference Figures 1 to 4 As shown, this utility model provides a slow-release fertilizer coating device for greenhouse vegetables, including: a coating roller 1, with a left support frame 2 and a right support frame 21 movably connected to the left and right sides of the coating roller 1 via connecting cylinders 14. A large gear 31 is installed on the left side of the coating roller 1 via a connecting column 14. A small gear 32 is meshed with the lower end of the large gear 31. A roller motor 3 is connected to the left side of the small gear 32 via a drive shaft 33. A central shaft 5 is provided inside the coating roller 1. The left and right sides of the central shaft 5 are fixed to the left support frame 2 and the right support frame 21 respectively via fixed shaft seats 54. The fixed shaft seats 54 are located on the left and right sides of the coating roller 1 via bearings. A stirring blade 52 and a spray head 53 are installed alternately on the lower shaft surface of the central shaft 5. The spray head 53 is connected to a coating agent delivery pipe 4 via a liquid delivery pipe 51.

[0019] First, the fertilizer granules to be coated are added into the coating roller 1 with the groove facing upwards. The blockage cover plate 11 is then placed on top. The roller motor 3 is controlled to drive the coating roller 1 to rotate through gear meshing. During rotation, the coating agent delivery pipe 4 delivers the coating agent to the spray head 53, causing the rotating coating roller 1 to carry the fertilizer granules upwards. Then, under the action of gravity, they fall. During the fall, the granules collide, hit, and splash with the fixed stirring blades 52, making the movement trajectory of the fertilizer granules more complex, changing from simple "sliding" to violent "rolling and splashing". This greatly increases the contact opportunity and uniformity between the fertilizer granules and the sprayed coating agent. The spray head 53 directly sprays the coating agent into the group of fertilizer granules that have been dispersed and fully diffused by the stirring blades 52, making the coating of the fertilizer granules more thorough and uniform. Finally, the coated fertilizer granules are heated and solidified by the electric heater 15 before being discharged.

[0020] In this embodiment, a material guide slot 12 is provided on the upper end face of the coating roller 1, and a sealing cover plate 11 is connected to the material guide slot 12. Connecting cylinder columns 14 are welded to both the left and right sides of the coating roller 1. An infrared positioner 13 is installed on the outer wall of the right side of the coating roller 1, and two sets of receivers 22 are installed on the surface of the right support frame 21. An electric heater 15 is installed inside the cylinder wall of the coating roller 1, and a roller motor 3 is fixed on the left end face of the left support frame 2. A coating agent delivery pipe 4 is distributed on the upper end of the roller motor 3.

[0021] In a preferred embodiment, the feed trough 12 facilitates the introduction or discharge of fertilizer granules into or out of the cylinder. The infrared positioner 13 emits an infrared signal, which is received by the receiver 22, positioning the feed trough 12 of the coating roller 1 in a downward or upward position, thus achieving the feeding or unloading state of the coating roller 1. The electric heater 15 heats the fertilizer granules sprayed with coating agent inside the coating roller 1 to a certain position, causing the coating to solidify and coat the surface of the fertilizer granules. The coating agent delivery pipe 4 is used to transport the coating agent to the spray head 43 for discharge.

[0022] In this embodiment, an infusion pipe 51 is installed through the inner side of the central shaft 5, and the lower end of the infusion pipe 51 is connected to the spray head 53 through a branch pipe. Fixing blocks 55 are welded to the left and right sides of the central shaft 5; the fixing blocks 55 are inserted into the groove surface of the fixing shaft seat 54, and the fixing shaft seat 54 is screwed to the fixing blocks 55 by fastening bolts 56. The spray heads 53 are equidistantly installed at the lower end of the central shaft 5, and the stirring blades 52 are distributed around the sides of the spray heads 53.

[0023] In a preferred embodiment, the infusion pipe 51 delivers the coating agent to multiple spray heads 53, allowing the spray heads 53 to directly spray the coating agent onto the fertilizer granules that have been dispersed and fully diffused by the stirring blades 52. This achieves precise spraying, improves the utilization rate of the coating agent, and reduces waste. The screw connection between the fixed shaft seat 54 and the central shaft 5 facilitates daily disassembly, maintenance, and cleaning. Multiple staggered stirring blades 52 collide, strike, and splash with the fertilizer granules rolling down inside the cylinder, effectively breaking up any clumps of fertilizer granules that may be stuck together. This makes the movement trajectory of the granules more complex, changing from simple "sliding" to vigorous "rolling and splashing," greatly increasing the contact opportunities and uniformity between the fertilizer granules and the sprayed coating agent, allowing the coating agent to more evenly and fully coat the fertilizer surface.

[0024] This utility model of a slow-release fertilizer coating device for greenhouse vegetables effectively solves the problem in the prior art where fertilizer particles easily accumulate inside the rotating drum, making it difficult to spray the coating agent evenly and fully onto the fertilizer surface. It effectively increases the contact opportunities and uniformity between fertilizer particles and spray droplets, making it easier for the coating agent to be delivered directly to the area where fertilizer mixing is most intense. This allows the coating agent to more evenly and fully coat the fertilizer surface, improving the coating uniformity and integrity of the slow-release fertilizer coating device. It is suitable for slow-release fertilizer coating devices for greenhouse vegetables.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A slow-release fertilizer coating device for greenhouse vegetables, comprising: A coating roller (1), wherein the left and right sides of the coating roller (1) are movably connected to a left support frame (2) and a right support frame (21) via connecting cylinders (14), characterized in that: A large gear (31) is installed on the left side of the coating roller (1) via a connecting cylinder column (14). A small gear (32) is meshed with the lower end of the large gear (31). A roller motor (3) is connected to the left side of the small gear (32) via a transmission shaft (33). A central shaft (5) is provided inside the coating roller (1). The left and right sides of the central shaft (5) are respectively fixed to the left support frame (2) and the right support frame (21) via fixed shaft seats (54). The fixed shaft seats (54) are connected through bearings to the left and right sides of the coating roller (1). A stirring blade (52) and a spray head (53) are alternately installed on the lower shaft surface of the central shaft (5). The spray head (53) is connected to a coating agent delivery pipe (4) via an infusion pipe (51).

2. The slow-release fertilizer coating device for greenhouse vegetables according to claim 1, characterized in that, The upper end face of the coating roller (1) is provided with a material guide groove (12), and a material blocking cover plate (11) is sealed and fastened at the material guide groove (12). Connecting cylinder columns (14) are welded to the left and right sides of the coating roller (1).

3. The slow-release fertilizer coating device for greenhouse vegetables according to claim 1, characterized in that, An infrared locator (13) is installed on the outer wall of the right side of the coating roller (1), and two sets of receivers (22) are installed on the surface of the right support frame (21).

4. The slow-release fertilizer coating device for greenhouse vegetables according to claim 1, characterized in that, An electric heater (15) is installed inside the cylinder wall of the coating roller (1), and a roller motor (3) is fixed on the left end face of the left support frame (2). A coating agent delivery pipe (4) is distributed on the upper end of the roller motor (3).

5. The slow-release fertilizer coating device for greenhouse vegetables according to claim 1, characterized in that, An infusion tube (51) is installed through the inner side of the central shaft (5), and the lower end of the infusion tube (51) is connected to the spray head (53) through a branch tube.

6. The slow-release fertilizer coating device for greenhouse vegetables according to claim 1, characterized in that, The central shaft (5) is welded with fixing blocks (55) on the left and right sides; and the fixing blocks (55) are inserted into the groove of the fixing shaft seat (54), and the fixing shaft seat (54) is screwed to the fixing blocks (55) by fastening bolts (56).

7. The slow-release fertilizer coating device for greenhouse vegetables according to claim 1, characterized in that, The spray heads (53) are equidistantly installed on the axial surface of the lower end of the central shaft (5), and the stirring blades (52) are distributed around the spray heads (53) on their side ends.

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