Spraying device for resin coated urea production

Abstract

The utility model relates to the technical field of urea production, and discloses a spraying device for resin coated urea production, which comprises a frame and a conveyor belt, side plates are vertically fixed at the front end and the rear end of the middle of the frame, and a rotating pipe is longitudinally and rotatably mounted above the position between the side edges of the front end and the rear end. The lower portion of the rotating pipe is connected with a lower pipe parallel to the conveying belt through connecting pipes at the two ends, liquid outlet holes are evenly formed in the bottom surface of the rotating pipe and the surface of the outer ring of the lower pipe, and the liquid outlet holes communicate with the interior of the rotating pipe and the interior of the lower pipe correspondingly. According to the technical scheme, coating liquid is sprayed on the surfaces of urea particles on the upper layer through the liquid outlet holes in the bottom of the rotating pipe and is discharged from the liquid outlet holes in the outer ring of the lower pipe, the lower pipe is arranged in the urea particles and swings in a reciprocating mode when the rotating pipe is driven to rotate, the coating liquid can be evenly distributed in the inner layers of the urea particles, and the coating effect is good. And finally, when the coating liquid enters the mixing equipment, uniform adhesion of the coating liquid can be obtained through relatively short stirring time, so that the film covering efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of urea production, in particular to a spraying device for producing resin-coated urea. Background Art

[0002] Resin-coated urea is a fertilizer that uses polymer materials to form a thin film on the surface of the fertilizer, quantitatively controlling the amount and period of nutrient release in the fertilizer, so that the nutrient supply is consistent with the fertilizer requirements of crops in different growth periods. It is one of the key and hot research directions at home and abroad. During production, ordinary urea granules are put into the mixing equipment together with the coating raw materials, and finally the coating film is evenly attached to the outer surface of the plastic granules.

[0003] The prior art first puts plastic particles into the equipment, and then adds the coating liquid to make it evenly attached to the outer surface of the urea particles. Since the added liquid is directly poured into the urea particles in the equipment, it is relatively concentrated in the urea particles, and it takes a longer time to stir and mix to make it evenly attached, resulting in a relatively low coating efficiency. Therefore, we propose a spraying device for the production of resin-coated urea. Utility Model Content

[0004] The utility model aims to provide a spraying device for producing resin-coated urea, in which the coating liquid is sprayed onto the surface of the urea particles in the upper layer through the liquid outlet holes at the bottom of the rotating tube, and discharged from the liquid outlet holes on the outer ring of the lower tube at the same time. When the rotating tube is driven to rotate, the lower tube is also placed in the urea particles and swings back and forth, so that the coating liquid can be evenly distributed in the inner layer of the urea particles at the same time. When the coating liquid finally enters the mixing device, the coating liquid can be evenly attached through a shorter stirring time, thereby improving the coating efficiency and solving the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a spraying device for the production of resin-coated urea, comprising a frame and a conveyor belt, guide rollers are longitudinally rotatably installed inside both sides of the frame, and the conveyor belt drive sleeve is placed on the outer ring between the guide rollers on both sides; side panels are vertically fixed to the front and rear ends of the middle position of the frame, a rotating pipe is longitudinally rotatably installed above between the front and rear ends, and a lower pipe parallel to the conveyor belt is connected to the lower part of the rotating pipe through connecting pipes at both ends; liquid outlet holes are evenly opened on the bottom surface of the rotating pipe and the outer ring surface of the lower pipe, and the liquid outlet holes are respectively connected to the inside of the rotating pipe and the lower pipe, and a stepper motor is installed on the side plate surface at the front end of the rotating pipe, and the stepper motor is transmission-connected to the rotating pipe.

[0006] By adopting the above technical solution, urea granules are placed on the surface of the conveyor belt and transported to the right. When passing under the rotating tube, part of the coating liquid is discharged from the liquid outlet hole under the rotating tube and sprayed on the upper surface of the urea granules, and the other part of the coating liquid is discharged from the liquid outlet hole of the lower tube. With the reciprocating swing of the lower tube, the coating liquid can be relatively evenly distributed in the upper and inner layers of the urea granules. Finally, the urea granules and the coating liquid are sent into the mixing device together to be mixed and coated.

[0007] Optionally, the frame is vertically supported by legs below both sides of the front end and the rear end, and a plurality of legs are provided.

[0008] By adopting the above technical solution and utilizing the supporting feet at the bottom of the frame, lateral stable support for the frame is achieved.

[0009] Optionally, a driving motor is installed on the frame surface of the front end of the guide roller at one end of the inner side of the conveyor belt, and the driving motor is transmission-connected to the guide roller.

[0010] By adopting the above technical solution, after the driving motor is started, it can drive the guide roller to rotate, and finally drive the conveyor belt to rotate clockwise.

[0011] Optionally, the front end outer ring and the rear end outer ring of the conveyor belt are both surrounded and fixed with side rubber sheets, and the side rubber sheets are connected to the surface of the conveyor belt to form an integral structure.

[0012] By adopting the above technical solution, when urea granules are placed on the surface of the conveyor belt and conveyed, the side rubber sheets can prevent them from sliding off the side of the conveyor belt.

[0013] Optionally, a liquid inlet pipe is connected to the upper middle position of the rotating tube, and the liquid inlet pipe is communicated with the interior of the rotating tube.

[0014] By adopting the above technical solution, the coating liquid supply equipment pipeline is connected to the liquid inlet pipe, and the coating liquid can be injected into the rotating tube and the lower tube.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] 1. The technical solution of the present application is to longitudinally arrange a rotatable rotating tube above the conveyor belt, and to arrange a lower tube connected to the rotating tube at the bottom thereof and close to the surface of the conveyor belt. When the urea granules are conveyed, the coating liquid can be sprayed onto the surface of the urea granules in the upper layer through the liquid outlet holes at the bottom of the rotating tube, and discharged through the liquid outlet holes on the outer ring of the lower tube. When the rotating tube is driven to rotate, the lower tube is also placed in the urea granules to swing back and forth, and the coating liquid can be evenly distributed in the inner layer of the urea granules at the same time. When the rotating tube finally enters the mixing device, the coating liquid can be evenly adhered through a shorter stirring time, thereby improving the coating efficiency.

[0017] 2. The technical solution of the present application is to provide side rubber sheets around the outer rings on both sides of the conveyor belt, so that the urea particles transported on the surface of the conveyor belt can be limited by the side rubber sheets to avoid sliding off from the sides. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of the spraying device for producing resin-coated urea of ​​the utility model;

[0020] Figure 2 The utility model is a schematic diagram of the bottom surface structure of the rotating tube of the spraying device for producing resin-coated urea.

[0021] In the figure: 1. frame; 11. drive motor; 12. support foot; 2. guide roller; 3. conveyor belt; 31. side rubber sheet; 4. side plate; 41. stepping motor; 5. rotating tube; 51. connecting tube; 52. lower tube; 53. liquid outlet; 54. liquid inlet pipe. DETAILED DESCRIPTION

[0022] See also Figure 1-2 The utility model provides a technical solution: a spraying device for the production of resin-coated urea, comprising a frame 1 and a conveyor belt 3, wherein the frame 1 is vertically supported by legs 12 at the lower sides of the front end and the rear end, wherein a plurality of legs 12 are provided, and all the legs 12 have the same height, so that the frame 1 can be supported and installed horizontally.

[0023] Guide rollers 2 are longitudinally rotatably installed inside both sides of the frame 1. The guide rollers 2 on both sides are of the same size and parallel to each other, so that the transmission sleeve of the conveyor belt 3 is placed on the outer ring between the guide rollers 2 on both sides. A driving motor 11 is installed on the surface of the frame 1 at the front end of the right guide roller 2. The driving motor 11 is connected to the guide roller 2 in transmission, and can drive the guide roller 2 on the right to rotate clockwise, thereby driving the conveyor belt 3 to rotate clockwise. Urea granules can be placed on the upper left side of the conveyor belt 3 to be transmitted to the right. The front end outer ring and the rear end outer ring of the conveyor belt 3 are both surrounded and fixed with side rubber sheets 31. The side rubber sheets 31 are connected to the surface of the conveyor belt 3 as an integral structure. The side rubber sheets 31 at the front and rear ends are parallel to each other, so that the urea granules can be received and transmitted on the surface of the conveyor belt 3 between the two side rubber sheets 31 to prevent them from slipping from the side.

[0024] The front and rear ends of the middle position of the frame 1 are both vertically fixed with side panels 4, and the two side panels 4 are parallel to each other. A rotating tube 5 is longitudinally rotatably installed above the side edges of the front and rear ends. The rotating tube 5 is parallel to the surface of the conveyor belt 3. A lower tube 52 parallel to the rotating tube 5 is arranged below the rotating tube 5. The lower tube 52 is close to the surface of the conveyor belt 3, and the lower tube 52 is connected and fixed to the lower part of the rotating tube 5 through connecting tubes 51 on both sides above it. The connecting tubes 51 connect the rotating tube 5 with the lower tube 52. A liquid inlet pipe 54 is connected to the middle position above the rotating tube 5. The liquid pipe 54 is connected with the interior of the rotating tube 5. The coating liquid supply device passes the coating liquid into the liquid inlet pipe 54 through the pipeline, and then enters the rotating tube 5, and enters the lower tube 52 from the connecting pipe 51. The bottom surface of the rotating tube 5 and the outer ring surface of the lower tube 52 are evenly opened with liquid outlet holes 53. The liquid outlet holes 53 are respectively connected with the interior of the rotating tube 5 and the lower tube 52, so that the coating liquid can be sprayed on the surface of the urea particles below the rotating tube 5, and at the same time discharged from the liquid outlet holes 53 of the lower tube 52 to enter the urea particles in the inner layer.

[0025] A stepper motor 41 is installed on the surface of the side plate 4 at the front end of the rotating tube 5, and the stepper motor 41 is in transmission connection with the rotating tube 5. In the above process, the rotating tube 5 can be driven by the stepper motor 41 to rotate slightly, so that the lower tube 52 is placed in the urea granules and swings slightly, which has a stirring effect on the urea granules and makes the coating liquid evenly placed in the urea granules.

[0026] When in use, the frame 1 is laterally supported and fixed by the support legs 12 in cooperation with the bottom plate thereof, so that the lower right side thereof is placed above the feed port of the mixing coating equipment, and the discharge pipe of the coating liquid supply equipment is connected to the liquid inlet pipe 54. The driving motor 11 and the stepping motor 41 are connected to the control device and connected to the power supply, and the driving motor 11 is controlled to drive the guide roller 2 to rotate clockwise, so that the conveyor belt 3 is also driven to rotate clockwise, and the urea particles to be coated are thrown from the left side to the top of the conveyor belt 3, and placed between the side rubber sheets 31, and are driven by the conveyor belt 3 to be transported to the right side, so that the coating liquid enters the rotating tube 5 through the liquid inlet pipe 54, and at the same time enters the lower tube 52 through the connecting tube 51. When the urea particles are transported to the middle position of the conveyor belt 3, the lower tube 52 located below will be directly buried. To the urea particles, and the rotating tube 5 is placed above the urea particles, a part of the coating liquid is discharged from the liquid outlet 53 below the rotating tube 5 and sprayed on the surface of the upper urea particles, and the other part is discharged from the liquid outlet 53 on the outer ring surface of the lower tube 52 and directly mixed into the urea particles located inside. In this process, the stepper motor 41 drives the rotating tube 5 to rotate reciprocatingly and at a small angle, and enables the lower tube 52 below to swing back and forth in the urea particles with a small amplitude, which has a moving and moving effect on the internal urea particles, and finally the coating liquid can be placed more evenly in the inner and outer layers of the urea particles. After being conveyed to the right side, the urea particles enter the mixing device, and the urea particles can be stirred by the mixing device, so that the coating liquid is evenly attached to the surface of the urea particles to form a coating film.

Claims

1. A spraying device for producing resin-coated urea, comprising a frame (1) and a conveyor belt (3), characterized in that: Guide rollers (2) are longitudinally rotatably installed inside both sides of the frame (1), and a transmission sleeve of the conveyor belt (3) is placed on the outer ring between the guide rollers (2) on both sides; Side plates (4) are vertically fixed at the front and rear ends of the middle position of the frame (1); a rotating tube (5) is longitudinally rotatably installed above the side edges of the front and rear ends; and a lower tube (52) parallel to the conveyor belt (3) is connected to the lower part of the rotating tube (5) through connecting tubes (51) at both ends; Liquid outlet holes (53) are evenly formed on the bottom surface of the rotating tube (5) and the outer surface of the lower tube (52), and the liquid outlet holes (53) are respectively connected to the inside of the rotating tube (5) and the lower tube (52). A stepper motor (41) is installed on the surface of the side plate (4) at the front end of the rotating tube (5), and the stepper motor (41) is connected to the rotating tube (5) in a transmission manner.

2. A spraying device for producing resin-coated urea according to claim 1, characterized in that: Support legs (12) are vertically supported below both sides of the front and rear ends of the frame (1), and a plurality of support legs (12) are provided.

3. The spraying device for producing resin-coated urea according to claim 1, characterized in that: A driving motor (11) is installed on the surface of the frame (1) at the front end of the guide roller (2) at one end of the inner side of the conveyor belt (3), and the driving motor (11) is transmission-connected to the guide roller (2).

4. The spraying device for producing resin-coated urea according to claim 1, characterized in that: The front end outer ring and the rear end outer ring of the conveyor belt (3) are both surrounded and fixed with side rubber sheets (31), and the side rubber sheets (31) are connected to the surface of the conveyor belt (3) to form an integral structure.

5. The spraying device for producing resin-coated urea according to claim 1, characterized in that: A liquid inlet pipe (54) is connected to the middle position above the rotating pipe (5), and the liquid inlet pipe (54) is in communication with the interior of the rotating pipe (5).

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