Coating material spraying device for coated fertilizer

Abstract

The utility model relates to a coating material spraying device for coated fertilizer. Comprising a fertilizer spraying roller and a coating material conveying pipeline arranged in the fertilizer spraying roller, a plurality of spray head pieces are evenly distributed on the coating material conveying pipeline, each spray head piece comprises a U-shaped spray head pipe, one side of each U-shaped spray head pipe is a feeding part, and the other side of each U-shaped spray head pipe is a discharging port; the feeding part comprises a feeding cavity connected with a coating material conveying pipeline and a compressed air inlet connected with a compressed air pipeline; the device has the characteristics of being simple in structure, reasonable in design and capable of effectively improving the surface uniformity of fertilizer particles, saving coating liquid and improving the adding precision of the coating liquid.

Description

Technical Field

[0001] The utility model relates to the technical field of fertilizer production, in particular to a coating material spraying device for coated fertilizers. Background Art

[0002] Coated fertilizer is a slow / controlled release fertilizer that uses a special process to wrap a semi-permeable film on the surface of ordinary fertilizer to slow down or control the release of fertilizer nutrients. Its main function is to control the nutrient release of coated fertilizer to match the nutrient needs of crops and improve the utilization rate of fertilizer. The key to the nutrient release of coated fertilizer lies in the uniformity of the film material. The main factor affecting the uniformity of the film material is that the film raw materials can be evenly dispersed on the particle surface and complete the reaction. Therefore, the uniformity of the raw materials on the particle surface directly affects the product quality of coated urea.

[0003] At present, coating materials are mostly added by gravity, that is, they enter the coating drum by gravity without power, and the fertilizer particles and coating liquid roll in the coating drum at the same time, and finally the liquid film of the fertilizer particles is fully covered by its own rolling. The above method has the following defects: 1. The accuracy of coating material addition is low, especially the coating liquid remaining in the nozzle after closing the valve will continue to enter the coating drum; it often causes excessive addition of coating liquid, thus affecting the quality of coated fertilizer; 2. The uniformity of the fertilizer particle surface is poorly controlled. Utility Model Content

[0004] The utility model aims to provide a coating material spraying device for coated fertilizers to overcome the defects in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A coating material spraying device for coated fertilizers comprises a fertilizer spraying drum and a coating material conveying pipeline arranged in the fertilizer spraying drum, a plurality of nozzle components are evenly distributed on the coating material conveying pipeline, the nozzle component comprises a U-shaped nozzle tube, one side of the U-shaped nozzle tube is a feeding part, and the other side of the U-shaped nozzle tube is a discharge port; the feeding part comprises a feeding cavity connected to the coating material conveying pipeline, and a compressed air inlet connected to the compressed air pipeline.

[0007] The beneficial effects of the utility model are as follows: by arranging a compressed air inlet on the nozzle component, the coating liquid can be atomized to achieve the purpose of uniform atomization between the fertilizer particles, thereby realizing the characteristic of improving the surface uniformity of the fertilizer particles. Furthermore, the utility model uses compressed air as the power not only to achieve atomization, but also when the compressed air is turned off, the U-shaped nozzle pipe can prevent the coating liquid from flowing into the coating drum, thereby achieving the purpose of accurately controlling the amount of coating liquid.

[0008] Preferably, the U-shaped nozzle tube is inverted, the feed cavity is arranged at the bottom of one side of the U-shaped nozzle tube, and the compressed air inlet is arranged in the middle of one side of the U-shaped nozzle tube; the outer side of the feed cavity is connected to the coating material delivery pipeline.

[0009] Preferably, the discharge port is arranged 2 to 3 cm away from the middle of the U-shaped nozzle pipe.

[0010] Preferably, the nozzle components are large nozzle components and small nozzle components, and the large nozzle components and the small nozzle components are alternately arranged on the coating material conveying pipeline.

[0011] Preferably, the ratio of the height of one side of the U-shaped nozzle tube in the large nozzle component to the height of one side of the U-shaped nozzle tube in the small nozzle component is 1.5-3:1.

[0012] A coating material spraying device for coated fertilizers made according to the above scheme, by arranging a compressed air inlet on the nozzle part, not only uses compressed air as a power to transport the coating liquid, but also can realize the atomization of the coating liquid, so as to achieve the goal of fully dispersing the coating liquid in the fertilizer spraying drum, thereby achieving the purpose of improving the surface uniformity of the fertilizer particles; it should be noted that the utility model uses compressed air as a power in conjunction with the U-shaped nozzle tube to achieve the goal of turning off the compressed air to prevent the coating liquid retained in the nozzle from entering the coating drum, thereby achieving the purpose of accurately controlling the amount of coating liquid; the U-shaped nozzle tube described in the utility model can be upright or inverted, and when it is an upright U-shaped nozzle tube, the compressed air is turned off After the air is released, the coating liquid on the other side of the U-shaped nozzle tube (the discharge port side) will flow back into the middle of the U-shaped nozzle tube to avoid outflow; when the U-shaped nozzle tube is inverted and the compressed air is turned off, the discharge port is set at 2 to 3 cm away from the middle of the U-shaped nozzle tube to avoid the accumulation of coating liquid on the other side of the U-shaped nozzle tube (the discharge port side); at the same time, the coating liquid on one side of the U-shaped nozzle tube can be temporarily stored in the feed cavity; further, the utility model can effectively avoid the defect of overlapping spraying areas and wasting coating liquid by staggered arrangement of large nozzle parts and small nozzle parts; it has the characteristics of simple structure, reasonable design, and can effectively improve the surface uniformity of fertilizer particles, save coating liquid and improve the accuracy of coating liquid addition. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 It is a structural schematic diagram of the nozzle component of the utility model.

[0015] Figure 3 It is a structural schematic diagram of another nozzle component of the utility model.

[0016] In the figure: 1. Fertilizer spraying drum; 2. Coating material conveying pipeline; 3. U-shaped nozzle pipe; 4. Feed cavity; 5. Compressed air pipeline; 6. Compressed air inlet; 7. Discharge port. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0018] Reference Figure 1-3 As shown, a coating material spraying device for coated fertilizers includes a fertilizer spraying drum 1 and a coating material conveying pipeline 2 arranged in the fertilizer spraying drum 1, and a plurality of nozzle components are evenly distributed on the coating material conveying pipeline 2, and the nozzle components include a U-shaped nozzle tube 3, one side of the U-shaped nozzle tube 3 is a feeding part, and the other side of the U-shaped nozzle tube 3 is a discharge port 7; the feeding part includes a feeding cavity 4 connected to the coating material conveying pipeline 2, and a compressed air inlet 6 connected to the compressed air pipeline 5. The spraying device described in the utility model is suitable for fertilizer coating. The conventional technology adopts the self-flowing mode of the coating liquid instead of the form of conveying the coating liquid by compressed air. Specifically, when the compressed air is used as the power, the compressed air entering the fertilizer spraying drum 1 will affect the running track of the fertilizer particles in the fertilizer spraying drum 1. Specifically, in the utility model, by setting the compressed air inlet 6, the coating liquid can be conveyed by compressed air as the power, and the coating liquid can be atomized at the same time, so that the coating liquid is fully dispersed in the fertilizer spraying drum, thereby improving the fertilizer particles. The uniformity of the particle surface; further, a U-shaped nozzle tube 3 is provided, and the U-shaped nozzle tube can be set forward or inverted, and the middle part of the U-shaped nozzle tube can weaken the power of the compressed air, so as to avoid excessive air pressure affecting the running trajectory of the fertilizer particles in the fertilizer spraying drum 1; when the U-shaped nozzle tube is in an upright position, after the compressed air is turned off, the coating liquid on the other side of the U-shaped nozzle tube (the discharge port side) will flow back into the middle part of the U-shaped nozzle tube to avoid outflow; when the U-shaped nozzle tube is in an inverted position, after the compressed air is turned off, excessive coating liquid is prevented from entering the fertilizer spraying drum 1 without power.

[0019] Furthermore, the U-shaped nozzle tube 3 is inverted, the feed cavity 4 is arranged at the bottom of one side of the U-shaped nozzle tube 3, and the compressed air inlet 6 is arranged in the middle of one side of the U-shaped nozzle tube 3; the outer side of the feed cavity 4 is connected with the coating material delivery pipeline 2. Through the above arrangement, the feed cavity 4 and the coating material delivery pipeline 2 can be connected, and rapid supply can be achieved when the coating liquid is supplied; when the coating liquid is stopped, the coating liquid accumulated on one side of the U-shaped nozzle tube 3 flows back into the feed cavity 4 and / or the coating material delivery pipeline 2.

[0020] Furthermore, the discharge port 7 is arranged 2 to 3 cm away from the middle of the U-shaped nozzle pipe 3. This arrangement can prevent excessive coating liquid from accumulating on the other side of the U-shaped nozzle pipe 3, thereby achieving the purpose of accurately controlling the coating liquid to enter the fertilizer spraying drum 1.

[0021] Furthermore, the nozzles are large nozzles and small nozzles, which are arranged alternately on the coating material delivery pipeline 2. The above arrangement can effectively avoid the defect of overlapping spraying areas and wasting coating liquid.

[0022] Furthermore, the ratio of the height of one side of the U-shaped nozzle tube 3 in the large nozzle component to the height of one side of the U-shaped nozzle tube 3 in the small nozzle component is 1.5-3:1.

[0023] The working principle of the utility model is as follows: after the fertilizer enters the fertilizer spraying drum 1, the fertilizer spraying drum 1 is started, and the fertilizer rolls in the fertilizer spraying drum 1. At the same time, the coating material conveying pipeline 2 supplies coating liquid to a plurality of nozzle parts, and the compressed air pipeline supplies compressed air to a plurality of nozzle parts. When the U-shaped nozzle tube 3 is set in the forward direction, the compressed air is used as the power to convey the coating liquid while atomizing the coating liquid. Furthermore, after the compressed air is decompressed at the middle turning point of the U-shaped nozzle tube 3, the compressed air is mixed with the film raw material at the nozzle outlet to form a mist curtain and enter the fertilizer spraying drum 1, which can be more evenly dispersed on the surface of the fertilizer. When the supply of coating liquid is stopped, the corresponding valves in the compressed air pipeline and the coating material conveying pipeline 2 can be closed. After the compressed air pipeline is closed, the coating liquid loses power and enters the middle part of the U-shaped nozzle tube 3, so as to achieve the characteristics of saving coating liquid and improving the accuracy of coating liquid addition. ; When the U-shaped nozzle tube 3 is set up in reverse, the compressed air is used as the power to convey the coating liquid and atomize the coating liquid at the same time. Furthermore, after the compressed air is decompressed at the middle turning point of the U-shaped nozzle tube 3, the compressed air is mixed with the film raw material at the nozzle outlet to form a mist curtain and enter the fertilizer spraying drum 1, which can be more evenly dispersed on the surface of the fertilizer; when the supply of coating liquid is stopped, the corresponding valves in the compressed air pipeline and the coating material conveying pipeline 2 can be closed. After the compressed air pipeline is closed, the coating liquid loses power and flows back into the feed cavity 4. By setting the discharge port 7 at a distance of 2 to 3 cm from the middle of the U-shaped nozzle tube 3, it is possible to avoid excessive coating liquid accumulating on the other side of the U-shaped nozzle tube 3, thereby achieving the purpose of accurately controlling the coating liquid entering the fertilizer spraying drum 1; it has the characteristics of simple structure, reasonable design, and can effectively improve the surface uniformity of fertilizer particles, save coating liquid and improve the accuracy of coating liquid addition.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coating material spraying device for coated fertilizers, comprising a fertilizer spraying drum (1) and a coating material conveying pipeline (2) arranged in the fertilizer spraying drum (1), characterized in that: A plurality of nozzles are evenly distributed on the coating material conveying pipeline (2). The nozzle component comprises a U-shaped nozzle tube (3), one side of the U-shaped nozzle tube (3) is a feed portion, and the other side of the U-shaped nozzle tube (3) is a discharge port (7); The feed section comprises a feed cavity (4) connected to a coating material delivery pipeline (2), and a compressed air inlet (6) connected to a compressed air pipeline (5).

2. The coating material spraying device for coated fertilizer according to claim 1, characterized in that: The U-shaped nozzle tube (3) is inverted, the feed cavity (4) is arranged at the bottom of one side of the U-shaped nozzle tube (3), and the compressed air inlet (6) is arranged in the middle of one side of the U-shaped nozzle tube (3); The outer side of the feed cavity (4) is connected to the coating material conveying pipeline (2).

3. The coating material spraying device for coated fertilizer according to claim 2, characterized in that: The discharge port (7) is arranged at a distance of 2 to 3 cm from the middle of the U-shaped nozzle tube (3).

4. A coating material spraying device for coated fertilizer according to any one of claims 2 or 3, characterized in that: The nozzle components include a large nozzle component and a small nozzle component, and the large nozzle component and the small nozzle component are arranged alternately on the coating material conveying pipeline (2).

5. The coating material spraying device for coated fertilizer according to claim 4, characterized in that: The ratio of the height of one side of the U-shaped nozzle tube (3) in the large nozzle component to the height of one side of the U-shaped nozzle tube (3) in the small nozzle component is 1.5 to 3:1.

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