Coating material spraying device for coated fertilizer
Technical Field
The utility model relates to the technical field of fertilizer production, in particular to a coating material spraying device for a coated fertilizer.
Background
The coated fertilizer is a slow/controlled release fertilizer which is prepared by coating a semipermeable membrane on the surface of a common fertilizer by a special process so as to slow down or control the release of fertilizer nutrients and has the main function of controlling the release of the nutrients of the coated fertilizer to match the nutrient requirements of crops so as to improve the utilization rate of the fertilizer. The key point of nutrient release of the coated fertilizer is the uniformity of the film, and the main factor affecting the uniformity of the film is that the film raw materials can be uniformly dispersed on the surfaces of particles and complete the reaction, so that the uniformity of the raw materials on the surfaces of the particles directly affects the product quality of the coated urea.
The existing coating materials are added in a multipurpose self-flowing mode, namely, the fertilizer particles and the coating liquid enter the coating roller in a gravity self-flowing mode under the unpowered premise and roll in the coating roller at the same time, and finally, the liquid film of the fertilizer particles rolls by the fertilizer particles to realize full coverage. The mode has the defects that 1, the adding accuracy of the coating material is low, particularly, coating liquid reserved in a spray nozzle after a valve is closed is enabled to continuously enter a coating roller, excessive coating liquid is often caused to be added, so that the quality of coated fertilizer is affected, and 2, the uniformity control of the surface of fertilizer particles is poor.
Disclosure of utility model
The utility model aims to provide a coating material spraying device for a coated fertilizer, which aims to overcome the defects in the prior art.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
The coating material spraying device for the coated fertilizer comprises a fertilizer spraying roller and a coating material conveying pipeline arranged in the fertilizer spraying roller, wherein a plurality of spray head pieces are uniformly 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, the other side of each U-shaped spray head pipe is a discharging hole, and each feeding part comprises a feeding cavity connected with the coating material conveying pipeline and a compressed air inlet connected with a compressed air pipeline.
The utility model has the beneficial effects that the compressed air inlet is arranged on the spray head piece, so that the purpose of atomizing the coating liquid between the uniform fertilizer particles is achieved, and the characteristic of improving the uniformity of the surface of the fertilizer particles is achieved.
Preferably, the U-shaped spray head pipe is arranged upside down, the feeding cavity is arranged at the bottom of one side of the U-shaped spray head pipe, the compressed air inlet is arranged in the middle of one side of the U-shaped spray head pipe, and the outer side of the feeding cavity is communicated with the coating material conveying pipeline.
Preferably, the discharge hole is arranged at a position 2-3 cm away from the middle of the U-shaped spray nozzle pipe.
Preferably, the spray head piece is a large spray head piece and a small spray head piece, and the large spray head piece and the small spray head piece are arranged on the coating material conveying pipeline in a staggered manner.
Preferably, the ratio of the height of one side of the U-shaped spray nozzle pipe in the large spray nozzle piece to the height of one side of the U-shaped spray nozzle pipe in the small spray nozzle piece is 1.5-3:1.
According to the coated fertilizer coating material spraying device manufactured according to the scheme, the compressed air inlet is formed in the spray head piece, compressed air is used as power to convey coating liquid, atomization of the coating liquid can be achieved, the coating liquid is fully dispersed in the fertilizer spraying roller, and accordingly the purpose of improving the uniformity of the surface of fertilizer particles is achieved, the compressed air is matched with the U-shaped spray head pipe, the purpose of closing the compressed air, the coating liquid reserved in the spray head can be prevented from entering the coating roller, the purpose of accurately controlling the coating liquid amount is achieved, the U-shaped spray head pipe can be arranged in a normal position or inverted position, after the compressed air is closed when the U-shaped spray head pipe is arranged in a normal position, the coating liquid at the other side (the side of the discharge port) of the U-shaped spray head pipe can flow back into the middle of the U-shaped spray head pipe, outflow is avoided, after the compressed air is closed when the U-shaped spray head pipe is arranged, the discharge port is arranged at a position 2-3 cm away from the middle of the U-shaped spray head pipe, the purpose of preventing the coating liquid from being stored at the other side (the side of the discharge port) of the U-shaped spray head pipe, meanwhile, the U-shaped spray head pipe can be prevented from being placed in a position, the thin and the coating liquid can be further arranged in an overlapping mode, the utility model, the defect of the surface area is further can be prevented, the coating liquid can be prevented from being caused, and the surface area is further, the defect is reasonable, and the coating liquid can be further improved, and the coated, and the coating film can be sprayed, and the surface has the advantages.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic structural view of the shower head member of the present utility model.
FIG. 3 is a schematic view of another embodiment of a spray head assembly according to the present utility model.
In the figure, a fertilizer spraying roller, a coating material conveying pipeline, a U-shaped spray nozzle pipe, a feeding cavity, a compressed air pipeline, a compressed air inlet and a discharge hole are respectively arranged at the bottom of the spray nozzle pipe, the spray nozzle pipe is arranged at the top of the spray nozzle pipe, and the spray nozzle pipe is arranged at the bottom of the spray nozzle pipe.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
Referring to figures 1-3, the coating material spraying device for the coated fertilizer comprises a fertilizer spraying roller 1 and a coating material conveying pipeline 2 arranged in the fertilizer spraying roller 1, wherein a plurality of spray head pieces are uniformly distributed on the coating material conveying pipeline 2, each spray head piece comprises a U-shaped spray head pipe 3, one side of the U-shaped spray head pipe 3 is a feeding part, the other side of the U-shaped spray head pipe 3 is a discharging hole 7, and the feeding part comprises a feeding cavity 4 connected with the coating material conveying pipeline 2 and a compressed air inlet 6 connected with a compressed air pipeline 5. The spraying device is suitable for being used for fertilizer coating, a mode of coating liquid self-flowing is adopted in the traditional technology, compressed air is not adopted to convey the coating liquid in a power mode, specifically, when the compressed air is adopted as power, the compressed air enters the fertilizer spraying roller 1 to influence the running track of fertilizer particles in the fertilizer spraying roller 1, in particular, the compressed air inlet 6 is arranged, the coating liquid can be conveyed in a power mode, meanwhile, atomization of the coating liquid is realized, so that the coating liquid is fully dispersed in the fertilizer spraying roller, uniformity of the surface of the fertilizer particles is improved, the U-shaped spray head pipe 3 is arranged, the power of the compressed air can be weakened in the middle of the U-shaped spray head pipe, so that the running track of the fertilizer particles in the fertilizer spraying roller 1 is prevented from being influenced by excessive air pressure, when the U-shaped spray head pipe is arranged in a normal mode, the coating liquid on the other side (the discharge port side) of the U-shaped spray head pipe is prevented from flowing back into the middle of the U-shaped spray head pipe, and when the U-shaped spray head pipe is arranged in an inverted mode, and the excessive air does not enter the fertilizer spraying roller 1 after the power is closed.
Further, the U-shaped spray head pipe 3 is arranged in an inverted mode, the feeding cavity 4 is arranged at the bottom of one side of the U-shaped spray head pipe 3, the compressed air inlet 6 is arranged in the middle of one side of the U-shaped spray head pipe 3, and the outer side of the feeding cavity 4 is communicated with the coating material conveying pipeline 2. Through the arrangement, the feeding cavity 4 and the coating material conveying pipeline 2 can be communicated, rapid supply is realized when the coating liquid is supplied, and the coating liquid stored on one side of the U-shaped spray head pipe 3 flows back into the feeding cavity 4 and/or the coating material conveying pipeline 2 when the supply of the coating liquid is stopped.
Further, the discharge hole 7 is arranged at a position 2-3 cm away from the middle of the U-shaped spray nozzle pipe 3. Through the arrangement, excessive coating liquid can be prevented from accumulating on the other side of the U-shaped spray head pipe 3, so that the purpose of accurately controlling the coating liquid to enter the fertilizer spraying roller 1 is achieved.
Further, the spray head pieces are large spray head pieces and small spray head pieces, and the large spray head pieces and the small spray head pieces are arranged on the coating material conveying pipeline 2 in a staggered mode. Through the arrangement, the defect that coating liquid is wasted due to overlapping of spraying areas can be effectively avoided.
Further, the ratio of the height of one side of the U-shaped spray nozzle pipe 3 in the large spray nozzle piece to the height of one side of the U-shaped spray nozzle pipe 3 in the small spray nozzle piece is 1.5-3:1.
When fertilizer enters the fertilizer spraying roller 1, the fertilizer spraying roller 1 is started, the fertilizer rolls in the fertilizer spraying roller 1, meanwhile, a coating material conveying pipeline 2 supplies coating liquid to a plurality of spray head pieces, and a compressed air pipeline supplies compressed air to the plurality of spray head pieces; when the U-shaped spray head pipe 3 is arranged in the forward direction, compressed air is used as power to convey coating liquid and atomize the coating liquid, and further, after the compressed air is depressurized at the turning position of the middle part of the U-shaped spray head pipe 3, the compressed air is mixed with film raw materials at the outlet of the spray head to form a fog curtain to enter the fertilizer spraying roller 1, so that the fog curtain can be more uniformly dispersed on the surface of a fertilizer; when the supply of the coating liquid is stopped, corresponding valves in the compressed air pipeline and the coating material conveying pipeline 2 are closed, the coating liquid loses power after the compressed air pipeline is closed, so that the middle part of the U-shaped spray head pipe 3 is closed, the characteristics of saving the coating liquid and improving the adding precision of the coating liquid are achieved, when the U-shaped spray head pipe 3 is arranged in a reverse direction, the compressed air is used as power to convey the coating liquid, and at the same time, the coating liquid is atomized, further, after the pressure of the compressed air is reduced at the middle turning part of the U-shaped spray head pipe 3, the pressure air and the coating raw material are mixed at the outlet of the spray head to form a fog curtain to enter the fertilizer spraying roller 1, so that the fog curtain can be more uniformly dispersed on the surface of the fertilizer, when the supply of the coating liquid is stopped, the corresponding valves in the compressed air pipeline and the coating material conveying pipeline 2 are closed, the coating liquid loses power after the compressed air pipeline is closed, and flows back into the feeding cavity 4, and excessive coating liquid stored at the other side of the U-shaped spray head pipe 3 can be avoided by arranging the discharge port 7 at the position 2-3 cm away from the middle part of the U-shaped spray head pipe 3, thereby achieving the aim of accurately controlling the coating liquid to enter the fertilizer spraying roller 1, and has the characteristics of simple structure, reasonable design, capability of effectively improving the uniformity of the surface of fertilizer particles, saving the coating liquid and improving the adding precision of the coating liquid.
Although embodiments of the present utility model 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 therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.