Water-soluble fertilizer particle grinding pretreatment equipment

Abstract

The invention relates to the technical field of water-soluble fertilizer preparation, and particularly discloses water-soluble fertilizer particle grinding pretreatment equipment which comprises two fixing frames, a rotating cylinder capable of rotating is installed between the two fixing frames, a moving cylinder is arranged in the rotating cylinder, a grinding gap is formed between the moving cylinder and the rotating cylinder, and the water-soluble fertilizer particle grinding pretreatment equipment further comprises a driving assembly. The driving assembly is used for driving the moving cylinder to eccentrically rotate in the rotating cylinder, and the moving cylinder and the rotating cylinder can rotate relatively during eccentric rotation; the grinding device further comprises a cooling assembly which is used for cooling the grinding gap. The grinding gap between the moving cylinder and the rotating cylinder is continuously changed through the cooperation of the moving cylinder and the rotating cylinder, so that the grinding effect on water-soluble fertilizer particles is achieved, the rotating cylinder rotates to drive the water-soluble particles to be continuously overturned and stirred, meanwhile, the cooling assembly cools the grinding gap, and the grinding effect is improved. Materials with large solubility in water-soluble fertilizer particles are prevented from being brought out and crystallized due to the temperature difference.

Description

Technical Field

[0001] The invention relates to the technical field of water-soluble fertilizer preparation, in particular to a water-soluble fertilizer particle grinding pretreatment device. Background Art

[0002] Water-soluble fertilizer is a multi-component compound fertilizer that can be completely soluble in water. It can dissolve quickly in water, is more easily absorbed by crops, and has a relatively high absorption and utilization rate. In the actual production process, in order to ensure the dissolution rate and fertilizer efficiency of water-soluble fertilizers during use, it is usually necessary to grind the granulated water-soluble fertilizer particles to achieve the ideal particle size and uniformity of the final product.

[0003] For example, Chinese patent number CN212549886U discloses a high-efficiency grinding device for the production of water-soluble fertilizers. The device respectively introduces block water-soluble fertilizers into a first feeding port and a second feeding port, so that the water-soluble fertilizers fall into a box between two sets of vertical plates, and drives the rotating shaft to rotate through a transmission device, thereby driving the grinding knife to rotate. After the grinding knife crushes the block water-soluble fertilizers, the screen is used to screen the water-soluble fertilizers with uniform particle size. By setting the above device, manual grinding can be replaced to improve work efficiency, and water-soluble fertilizers with uniform particle size can be output, thereby improving fertilizer quality and improving practicality.

[0004] However, when the water-soluble fertilizer particles are ground using the above scheme, since the blocky water-soluble fertilizer will continuously generate heat when in contact with the grinding knife, the water-soluble fertilizer particles are heated for a long time, resulting in a temperature and moisture gradient between the particle surface and the fertilizer core. The moisture will continuously migrate to the surface along the gradient, thereby increasing the adhesion of the ground water-soluble fertilizer particles, thereby causing agglomeration. At the same time, the particles may also stick to the grinding knife and affect the grinding effect. Summary of the invention

[0005] The object of the present invention is to provide a water-soluble fertilizer particle grinding pretreatment device to solve at least one technical problem existing in the above-mentioned prior art.

[0006] To achieve the above object, the present invention provides the following technical solution: a water-soluble fertilizer particle grinding pretreatment device, comprising two fixed frames, a rotatable rotating cylinder is installed between the two fixed frames, a moving cylinder is arranged inside the rotating cylinder, and a grinding gap is arranged between the moving cylinder and the rotating cylinder;

[0007] It also includes a driving assembly, which is used to drive the moving cylinder to rotate eccentrically in the rotating cylinder, and the moving cylinder and the rotating cylinder rotate relative to each other during the eccentric rotation;

[0008] It also includes a cooling component, which is used to cool the grinding gap.

[0009] Preferably, the driving assembly includes tooth grooves fixed on the inner walls at both ends of the rotating cylinder, and the outer walls at both ends of the movable cylinder are provided with teeth that can engage with the tooth grooves, and a rotating shaft that can rotate eccentrically with the axis of the rotating cylinder as the center is installed in the through groove opened in the movable cylinder, and a threaded grinding part is provided on the inner wall of the rotating cylinder located in the grinding gap.

[0010] Preferably, both ends of the rotating shaft are fixedly connected with eccentric shafts, and the two eccentric shafts are rotatably mounted on two fixed frames respectively, a motor is fixedly mounted on the side wall of one of the fixed frames, one end of the eccentric shaft is fixedly mounted on the end of the motor driving shaft, and fixed shafts are fixedly mounted on the side walls of both ends of the moving cylinder;

[0011] The driving assembly also includes a limiting assembly, and the limiting assembly is used to limit the rotation of the fixed shaft.

[0012] Preferably, the limit assembly includes two rotating shafts fixedly installed on the inner wall of the fixed frame, a limiter is provided on the outer side of the eccentric shaft, and a sliding groove for vertical sliding of the fixed shaft is opened in the limiter, two rotating rods are rotatably installed between the two rotating shafts and the limiter respectively, and a hollow groove for the eccentric shaft to pass through is opened on the outer wall of the limiter.

[0013] Preferably, the cooling assembly includes a cooling pipe provided in the threaded grinding part, annular liquid tanks are provided in the two fixed frames, both ends of the cooling pipe are respectively located in the two annular liquid tanks, second piston boxes are fixedly installed on the side walls of the two annular liquid tanks, a piston plate is slidably installed in the second piston box, a piston rod is fixedly connected to the bottom of the piston plate, which passes through the second piston box and can slide vertically, a rotating rod is rotatably connected between the bottom end of the piston rod and the fixed shaft, one of the second piston boxes is connected to the annular liquid tank on the same side through a one-way liquid inlet valve, and the other second piston box is connected to the annular liquid tank on the same side through a one-way liquid outlet valve, and the two second piston boxes are connected to an external liquid supply device.

[0014] Preferably, a conical cylinder is fixedly mounted on the outer wall of the rotating cylinder, and a discharge rack is rotatably mounted on the outer wall at the expanded mouth of the conical cylinder. The discharge rack is connected to a nearby fixed rack by bolts, and a discharge port is provided at the bottom of the expanded mouth of the conical cylinder. The outer wall of the rotating cylinder near the narrow mouth of the conical cylinder is annularly distributed with multiple discharge ports.

[0015] Preferably, annular air bins are further provided in the two fixing frames, a first piston box is fixedly installed on the side wall of the annular air bin, a piston plate is also provided in the first piston box and the piston rod is inserted into the first piston box and fixedly connected to the piston plate therein, the first piston box is communicated with an external air supply device, a plurality of nozzles are annularly distributed on the inner wall of the conical cylinder on the side of the discharge port, the nozzles of the nozzles are flat and parallel to the inner wall of the conical cylinder, a plurality of groups of air pipes are annularly distributed on the side of one of the annular air bins, the nozzles can be unidirectionally connected with the air pipe below the annular air bin through a pipe buried in the conical cylinder, and the other annular air bin is unidirectionally connected with the conical cylinder and the outside world through the air outlet.

[0016] Preferably, the outer wall of the movable cylinder is provided with a threaded protrusion corresponding to the threaded grinding piece.

[0017] Preferably, a feed port is fixedly installed on the side wall of the fixed frame away from the motor, one end of the eccentric shaft on the same side of the feed port is rotatably connected to the feed port, and a feed channel is commonly provided in the eccentric shaft and the rotating shaft, and the feed channel can be connected to the grinding gap through multiple groups of pipelines distributed in an annular manner in the moving cylinder.

[0018] Preferably, the inner wall of the conical cylinder is provided with friction lines.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention achieves a grinding effect on water-soluble fertilizer particles by cooperating between the moving cylinder and the rotating cylinder so that the grinding gap between the two changes continuously. The water-soluble fertilizer particles are driven to be continuously turned and stirred by the rotation of the rotating cylinder, so that the water-soluble fertilizer particles can be ground in a relatively closed space to avoid the influence of external air or water vapor on the water content of the water-soluble fertilizer particles. At the same time, the cooling component cools the grinding gap to reduce the temperature difference caused by the high solubility of the water-soluble fertilizer particles being brought out and crystallized.

[0021] 2. The present invention drives the coolant to flow unidirectionally along the cooling pipe through the cooperation of the two second piston boxes, so that the coolant can cool the thread grinding and the grinding gap together when flowing through the grinding gap, so that the temperature in the grinding gap is maintained at a relatively stable low temperature state, while preventing the water-soluble fertilizer particles from being affected by the grinding heat and causing a temperature gradient between the particle core and the surface, the brittleness of the water-soluble fertilizer particles can be increased, thereby improving the effect of grinding the water-soluble fertilizer particles.

[0022] 3. The present invention forms a dry airflow in the conical cylinder in the opposite direction to the downward direction of the water-soluble fertilizer particles, dries the water-soluble fertilizer particle fragments during the re-granulation process, and ensures that the water-soluble fertilizer particles stay in the conical cylinder for a sufficient time to complete drying. Since needle-shaped crystals may precipitate on the surface of the particles after water evaporates during drying, the rotation of the conical cylinder drives the water-soluble fertilizer particles and the conical cylinder to rub against each other, breaking the precipitated needle-shaped crystals and mixing them with the water-soluble fertilizer particle fragments for re-granulation, thereby improving the utilization rate of the water-soluble fertilizer particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 It is a side cross-sectional view of the present invention;

[0025] Figure 3 The cross section of the three-dimensional structure schematic diagram of the present invention Figure 1 ;

[0026] Figure 4 The cross section of the three-dimensional structure schematic diagram of the present invention Figure 2 ;

[0027] Figure 5 It is a partial cross-sectional view of the three-dimensional structure schematic diagram of the present invention;

[0028] Figure 6 is a side cross-sectional view of the fixing frame of the present invention;

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the driving component in the present invention;

[0030] Figure 8 For the present invention Figure 5 Enlarged view of point A in the middle.

[0031] In the figure: 1. fixed frame; 2. discharge frame; 3. conical cylinder; 4. feed port; 5. motor; 6. rotating shaft; 7. moving cylinder; 8. rotating cylinder; 9. threaded grinding part; 10. cooling pipe; 11. annular air chamber; 12. annular liquid chamber; 13. first piston box; 14. second piston box; 15. eccentric shaft; 16. limiter; 17. rotating rod; 18. fixed shaft; 19. piston rod; 20. piston plate; 21. nozzle; 22. rotating rod; 23. air outlet; 24. feed channel; 25. rotating shaft; 26. discharge port. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figures 1 to 8 The present invention provides a technical solution: a water-soluble fertilizer particle grinding pretreatment device, comprising two fixed frames 1, a rotatable rotating cylinder 8 is installed between the two fixed frames 1, a moving cylinder 7 is arranged inside the rotating cylinder 8, and a grinding gap is arranged between the moving cylinder 7 and the rotating cylinder 8;

[0034] It also includes a driving assembly, which is used to drive the moving cylinder 7 to rotate eccentrically in the rotating cylinder 8, and the moving cylinder 7 and the rotating cylinder 8 rotate relative to each other during the eccentric rotation;

[0035] It also includes a cooling component, which is used to cool the grinding gap.

[0036] In the prior art, during the grinding process of water-soluble fertilizer particles, water carries easily soluble components to the surface of the particles, which easily causes needle-shaped crystals to precipitate on the surface of the particles after the water evaporates. In addition, due to the presence of free water, substances with high solubility are easily enriched on the surface of the water-soluble fertilizer particles, resulting in increased adhesion between the fertilizer particles, thereby causing agglomeration. In view of this phenomenon, the present invention makes the following improvements:

[0037] When the device is in use, the water-soluble fertilizer particles are first placed in the grinding gap between the rotating cylinder 8 and the moving cylinder 7, and then the moving cylinder 7 is driven to rotate eccentrically in the rotating cylinder 8. At this time, the rotating cylinder 8 rotates along the center of the circle. Due to the continuous reduction or expansion of the grinding gap, the water-soluble fertilizer particles therein are continuously squeezed by the rotating cylinder 8 and the moving cylinder 7, thereby reducing the size of the water-soluble fertilizer particles and improving their particle size. Due to the action of their own gravity, the water-soluble fertilizer particles will move a distance along the rotation direction of the rotating cylinder 8 and then slide back to the bottom end of the inner wall of the rotating cylinder 8, thereby improving the uniformity of the water-soluble fertilizer particles during grinding, and during the grinding process, the grinding gap is cooled by the cooling component to avoid the temperature and moisture gradient between the surface and the center of the water-soluble fertilizer particles after being heated for a long time, until the grinding of the water-soluble fertilizer particles is completed.

[0038] In this way, the grinding gap between the moving cylinder 7 and the rotating cylinder 8 is constantly changed to achieve the grinding effect of the water-soluble fertilizer particles, and the rotation of the rotating cylinder 8 drives the water-soluble fertilizer particles to be continuously turned and stirred, so that the water-soluble fertilizer particles can be ground in a relatively closed space to avoid the influence of external air or water vapor on the water content of the water-soluble fertilizer particles. At the same time, the cooling component cools the grinding gap to reduce the temperature difference caused by the water-soluble fertilizer particles The substances with higher solubility are taken out and crystallized.

[0039] Furthermore, the driving assembly includes tooth grooves fixed on the inner walls at both ends of the rotating cylinder 8, and the outer walls at both ends of the moving cylinder 7 are provided with teeth that can engage with the tooth grooves. A rotating shaft 6 that can eccentrically rotate around the axis of the rotating cylinder 8 is installed in the through groove opened in the moving cylinder 7, and a threaded grinding part 9 is provided on the inner wall of the rotating cylinder 8 located in the grinding gap.

[0040] According to the above embodiment, a specific embodiment of a driving assembly is provided. Figure 6 When the rotating shaft 6 drives the moving cylinder 7 to rotate eccentrically with the axis of the rotating cylinder 8 as the center of the circle, the teeth on the outer wall of the moving cylinder 7 continuously engage or disengage with the tooth grooves at both ends of the rotating cylinder 8, driving the rotating cylinder 8 to start rotating with the center of the circle, thereby achieving the purpose that the rotating cylinder 8 also starts to rotate when the moving cylinder 7 rotates eccentrically as mentioned above. When the moving cylinder 7 rotates eccentrically, the threaded grinding part 9 will generate an oblique extrusion force on the water-soluble fertilizer particles, so that the water-soluble fertilizer particles are subjected to axial thrust while being subjected to radial extrusion pressure, and continuously move horizontally along the inner wall of the rotating cylinder 8.

[0041] In this way, the rotating shaft 6 drives the moving cylinder 7 to rotate eccentrically with the axis of the rotating cylinder 8 as the center, while driving the rotating cylinder 8 to rotate around the center, thereby enhancing the consistency of movement of various parts of the device and avoiding mutual squeezing of various parts to cause the device to get stuck.

[0042] Furthermore, both ends of the rotating shaft 6 are fixedly connected with eccentric shafts 15, and the two eccentric shafts 15 are rotatably mounted on two fixed frames 1 respectively, a motor 5 is fixedly mounted on the side wall of one of the fixed frames 1, one end of the eccentric shaft 15 is fixedly mounted on the end of the driving shaft of the motor 5, and fixed shafts 18 are fixedly mounted on the side walls of both ends of the moving cylinder 7;

[0043] The driving assembly also includes a limiting assembly, which is used to limit the rotation of the fixed shaft 18.

[0044] According to the above implementation mode, it can be seen that Figure 7 When the motor 5 drives the rotating shaft 6 to rotate eccentrically through the eccentric shaft 15, the fixed shaft 18 cannot rotate along the circle centered on the rotating shaft 6 due to the limiting assembly, so that the moving cylinder 7 cannot rotate by itself while following the rotating shaft 6 to rotate eccentrically, so that when the moving cylinder 7 drives the rotating cylinder 8 to rotate, no relative rotation can be generated between the two.

[0045] Furthermore, the limit assembly includes two rotating shafts 25 fixedly installed on the inner wall of the fixed frame 1, a limiter 16 is provided on the outer side of the eccentric shaft 15, and a sliding groove is provided in the limiter 16 for the fixed shaft 18 to slide vertically, two rotating rods 17 are rotatably installed between the two rotating shafts 25 and the limiter 16, and a hollow groove is provided on the outer wall of the limiter 16 for the eccentric shaft 15 to pass through.

[0046] According to the above embodiment, a specific embodiment of a limit assembly is provided. Figure 7 When the motor 5 drives the rotating shaft 6 to rotate eccentrically through the eccentric shaft 15, since the rotating shaft 25 is fixed in position, the rotating rod 17 can only swing back and forth with the rotating shaft 25 as the center. At this time, the limiter 16 is restricted by the rotating rod 17 and swings back and forth together, so that the fixed shaft 18 will slide along the sliding groove provided in the limiter 16 when the moving cylinder 7 rotates eccentrically, thereby completing the self-rotation limit of the moving cylinder 7 and preventing the moving cylinder 7 from rotating and being unable to drive the rotating cylinder 8 to rotate.

[0047] Furthermore, the cooling assembly includes a cooling pipe 10 opened in the threaded grinding part 9, annular liquid tanks 12 are opened in the two fixed frames 1, and the two ends of the cooling pipe 10 are respectively located in the two annular liquid tanks 12, and the side walls of the two annular liquid tanks 12 are fixedly installed with second piston boxes 14, and a piston plate 20 is slidably installed in the second piston box 14. The bottom of the piston plate 20 is fixedly connected to a piston rod 19 that passes through the second piston box 14 and can slide vertically, and a rotating rod 22 is rotatably connected between the bottom end of the piston rod 19 and the fixed shaft 18. One of the second piston boxes 14 is connected to the annular liquid tank 12 on the same side through a one-way liquid inlet valve, and the other second piston box 14 is connected to the annular liquid tank 12 on the same side through a one-way liquid outlet valve, and the two second piston boxes 14 are connected to an external liquid supply device.

[0048] According to the above embodiment, a specific embodiment of a cooling assembly is provided. Figure 2 When the fixed shaft 18 slides along the sliding groove provided in the limiter 16, the piston rods 19 on both sides will be driven to slide back and forth in the second piston box 14. Since the two second piston boxes 14 are respectively connected to the annular liquid storages 12 on both sides in one direction and the connecting directions are consistent, the coolant in the second piston box 14 on one side will flow in a spiral shape along the cooling pipe 10 to the second piston box 14 on the other side. The coolant cools the threaded grinding member 9 and the grinding gap around it along the cooling pipe 10, so that the water-soluble fertilizer particles can be low-temperature ground in a relatively sealed environment, thereby preventing the water-soluble fertilizer particles from being affected by the grinding heat and causing a temperature gradient between the particle core and the surface.

[0049] In this way, the two second piston boxes 14 cooperate with each other to drive the coolant to flow unidirectionally along the cooling pipe 10, so that the coolant can cool the threaded grinding member 9 and the grinding gap together when flowing through the grinding gap, so that the temperature in the grinding gap remains in a relatively stable low-temperature state, while preventing the water-soluble fertilizer particles from being affected by the grinding heat and causing a temperature gradient between the core and the surface of the particle, the brittleness of the water-soluble fertilizer particles can be increased, thereby improving the effect on the water-soluble fertilizer particles.

[0050] Furthermore, a conical cylinder 3 is fixedly mounted on the outer wall of the rotating cylinder 8, and a discharge rack 2 is rotatably mounted on the outer wall at the expanded mouth of the conical cylinder 3. The discharge rack 2 is connected to a nearby fixed rack 1 by bolts, and a discharge port 26 is provided at the bottom of the expanded mouth of the conical cylinder 3. A plurality of discharge ports are distributed in an annular manner on the outer wall of the rotating cylinder 8 near the narrow mouth of the conical cylinder 3.

[0051] According to the above embodiment, when the moving cylinder 7 rotates eccentrically, the threaded grinding part 9 will generate an oblique extrusion force on the water-soluble fertilizer particles, so that the water-soluble fertilizer particles are subjected to axial thrust while being subjected to radial extrusion force, and continuously move horizontally along the inner wall of the rotating cylinder 8. When the water-soluble fertilizer particles move to the drop port and fall onto the inner wall of the conical cylinder 3, since the conical cylinder 3 rotates together with the rotating cylinder 8, the water-soluble fertilizer particles continuously rub against the conical cylinder 3 under the action of their own gravity, so that the ground water-soluble fertilizer particle fragments can be re-granulated and slide down along the inclined surface of the conical cylinder 3 to the discharge port 26 for discharge.

[0052] In this way, the ground water-soluble fertilizer particle fragments are re-granulated by the conical cylinder 3, so that the roundness of the water-soluble fertilizer particles is increased, thereby increasing the contact area of ​​the water-soluble fertilizer particles in water, and improving the solubility and uniformity of the water-soluble fertilizer particles.

[0053] Furthermore, an annular gas warehouse 11 is also provided in the two fixed frames 1, and a first piston box 13 is fixedly installed on the side wall of the annular gas warehouse 11. A piston plate 20 is also provided in the first piston box 13, and the piston rod 19 penetrates into the first piston box 13 and is fixedly connected to the piston plate 20 therein. The first piston box 13 is connected to an external air supply device, and a plurality of nozzles 21 are distributed in an annular manner on the inner wall of the conical cylinder 3 on the side of the discharge port 26. The nozzles of the nozzles 21 are flat and parallel to the inner wall of the conical cylinder 3. A plurality of groups of air pipes are distributed in an annular manner on the side of one of the annular gas warehouses 11. The nozzles 21 can be unidirectionally connected with the air pipe below the annular gas warehouse 11 through a pipeline buried in the conical cylinder 3, and the other annular gas warehouse 11 is unidirectionally connected with the conical cylinder 3 and the outside world through the air outlet 23.

[0054] According to the above implementation mode, it can be seen that Figure 2When the piston rod 19 in the first piston box 13 is driven by the rotating rod 22 to push the piston plate 20 to slide reciprocatingly up and down in the first piston box 13, the dry gas in the first piston box 13 can be sprayed out from the nozzle 21 at the bottom of the conical cylinder 3 to dry the water-soluble fertilizer particles along the inner wall of the conical cylinder 3. After the dry air moves from left to right in the conical cylinder 3 to the rightmost side, it enters the annular air bin 11 on the right along the air outlet 23 and is discharged into the air after being processed. When the water-soluble fertilizer particles move to the drop port and fall onto the inner wall of the conical cylinder 3, the flow direction of the dry air is opposite to the downward direction of the water-soluble fertilizer particles, so that the downward speed of the water-soluble fertilizer particles is reduced to ensure that the water-soluble fertilizer particles can be dried to a moisture content that meets the standard.

[0055] In this way, by forming a dry airflow in the opposite direction to the downward direction of the water-soluble fertilizer particles in the conical cylinder 3, the water-soluble fertilizer particle fragments are dried during the re-granulation process, and at the same time, it is ensured that the water-soluble fertilizer particles stay in the conical cylinder 3 for a sufficient time to complete the drying. Since the water on the surface of the water-soluble fertilizer particles may precipitate to form needle-shaped crystals after evaporation of water during drying, the rotation of the conical cylinder 3 drives the water-soluble fertilizer particles and the conical cylinder 3 to rub against each other, break the precipitated needle-shaped crystals and mix them with the water-soluble fertilizer particle fragments for re-granulation, thereby improving the utilization rate of the water-soluble fertilizer particles.

[0056] Furthermore, the outer wall of the moving cylinder 7 is provided with a threaded protrusion corresponding to the threaded grinding member 9 .

[0057] According to the above embodiment, since the outer wall of the movable cylinder 7 is provided with a threaded protrusion corresponding to the threaded grinding member 9, the grinding of the water-soluble fertilizer particles by the grinding gap is changed from unidirectional spiral force to bidirectional spiral force, thereby increasing the force points of the water-soluble fertilizer particles to improve the grinding efficiency and accelerate the moving speed of the water-soluble fertilizer particles, thereby avoiding excessive reduction in particle size and hardness due to excessive grinding.

[0058] Furthermore, a feed port 4 is fixedly installed on the side wall of the fixed frame 1 away from the motor 5, one end of the eccentric shaft 15 on the same side of the feed port 4 is rotatably connected to the feed port 4, and a feed channel 24 is commonly provided in the eccentric shaft 15 and the rotating shaft 6. The feed channel 24 can be connected to the grinding gap through multiple groups of pipelines distributed in an annular manner in the moving cylinder 7.

[0059] According to the above embodiment, after the water-soluble fertilizer particles are put into the feed port 4, the water-soluble fertilizer particles enter the rotating shaft 6 through the feed channel 24 and then enter the grinding gap through the pipeline in the moving cylinder 7, so that the grinding gap remains in a sealed state, avoiding interference of the external environment on the quality of the water-soluble fertilizer particles.

[0060] Furthermore, the inner wall of the conical tube 3 is provided with friction lines.

[0061] According to the above embodiment, friction lines are provided on the inner wall of the conical tube 3 to increase the friction between the water-soluble fertilizer particles and the inner wall of the conical tube 3, thereby improving the bonding between the crystals and the water-soluble fertilizer particles and enabling the two to form smooth particles.

[0062] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification and the drawings can also be directly processed according to the existing technical common sense. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0063] 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 water-soluble fertilizer particle grinding pretreatment device, comprising two fixed frames (1), characterized in that: A rotatable rotating cylinder (8) is installed between the two fixed frames (1), a moving cylinder (7) is arranged inside the rotating cylinder (8), and a grinding gap is arranged between the moving cylinder (7) and the rotating cylinder (8); It also includes a driving assembly, which is used to drive the moving cylinder (7) to rotate eccentrically in the rotating cylinder (8), and when the moving cylinder (7) rotates eccentrically, it and the rotating cylinder (8) will rotate relative to each other; It also includes a cooling component, which is used to cool the grinding gap.

2. The water-soluble fertilizer particle grinding pretreatment equipment according to claim 1 is characterized in that: The driving assembly comprises tooth grooves fixed on the inner walls at both ends of the rotating cylinder (8), and the outer walls at both ends of the moving cylinder (7) are provided with teeth capable of meshing with the tooth grooves. A rotating shaft (6) capable of eccentrically rotating with the axis of the rotating cylinder (8) as the center of a circle is installed in a through groove provided in the moving cylinder (7), and a threaded grinding member (9) is provided on the inner wall of the rotating cylinder (8) located in the grinding gap.

3. The water-soluble fertilizer particle grinding pretreatment equipment according to claim 2 is characterized in that: Both ends of the rotating shaft (6) are fixedly connected with eccentric shafts (15), and the two eccentric shafts (15) are rotatably mounted on two fixed frames (1) respectively, a motor (5) is fixedly mounted on the side wall of one of the fixed frames (1), one end of the eccentric shaft (15) is fixedly mounted on the end of the driving shaft of the motor (5), and fixed shafts (18) are fixedly mounted on the side walls of both ends of the moving cylinder (7); The driving assembly further comprises a limiting assembly, and the limiting assembly is used to limit the rotation of the fixed shaft (18).

4. The water-soluble fertilizer particle grinding pretreatment equipment according to claim 3 is characterized in that: The limit assembly comprises two rotating shafts (25) fixedly mounted on the inner wall of the fixed frame (1); a limiter (16) is arranged on the outer side of the eccentric shaft (15); a sliding groove is provided in the limiter (16) for the fixed shaft (18) to slide vertically; two rotating rods (17) are rotatably mounted between the two rotating shafts (25) and the limiter (16), and a hollow groove is provided on the outer wall of the limiter (16) for the eccentric shaft (15) to pass through.

5. The water-soluble fertilizer particle grinding pretreatment equipment according to claim 3 is characterized in that: The cooling assembly comprises a cooling pipe (10) provided in the threaded grinding member (9), an annular liquid bin (12) provided in each of the two fixing frames (1), two ends of the cooling pipe (10) being respectively located in the two annular liquid bins (12), second piston boxes (14) being fixedly installed on the side walls of the two annular liquid bins (12), a piston plate (20) being slidably installed in the second piston box (14), a piston rod (19) being fixedly connected to the bottom of the piston plate (20) and penetrating the second piston box (14) and being able to slide vertically, a rotating rod (22) being rotatably connected between the bottom end of the piston rod (19) and the fixed shaft (18), one of the second piston boxes (14) being connected to the annular liquid bin (12) on the same side through a one-way liquid inlet valve, and the other second piston box (14) being connected to the annular liquid bin (12) on the same side through a one-way liquid outlet valve, and both of the second piston boxes (14) being connected to an external liquid supply device.

6. The water-soluble fertilizer particle grinding pretreatment equipment according to claim 5 is characterized in that: The outer wall of the rotating cylinder (8) is also fixedly mounted with a conical cylinder (3); a discharge rack (2) is rotatably mounted on the outer wall at the expanded mouth of the conical cylinder (3); the discharge rack (2) is connected to a nearby fixed rack (1) by bolts; a discharge port (26) is provided at the bottom of the expanded mouth of the conical cylinder (3); and a plurality of discharge ports are annularly distributed on the outer wall of the rotating cylinder (8) near the narrow mouth of the conical cylinder (3).

7. The water-soluble fertilizer particle grinding pretreatment equipment according to claim 6 is characterized in that: An annular gas chamber (11) is also provided in the two fixing frames (1). A first piston box (13) is fixedly installed on the side wall of the annular gas chamber (11). A piston plate (20) is also provided in the first piston box (13). The piston rod (19) penetrates into the first piston box (13) and is fixedly connected to the piston plate (20) therein. The first piston box (13) is connected to an external air supply device. A plurality of nozzles (21) are distributed in an annular manner on the inner wall of the conical cylinder (3) on the side of the discharge port (26). The nozzles of the nozzles (21) are flat and arranged parallel to the inner wall of the conical cylinder (3). A plurality of groups of air pipes are distributed in an annular manner on the side of one of the annular gas chambers (11). The nozzles (21) can be unidirectionally connected to the air pipe below the annular gas chamber (11) through a pipeline buried in the conical cylinder (3). The other annular gas chamber (11) is unidirectionally connected to the conical cylinder (3) and the outside through the air outlet (23).

8. The water-soluble fertilizer particle grinding pretreatment equipment according to claim 2 is characterized in that: The outer wall of the moving cylinder (7) is provided with a threaded protrusion corresponding to the threaded grinding piece (9).

9. The water-soluble fertilizer particle grinding pretreatment equipment according to claim 3 is characterized in that: A feed port (4) is fixedly mounted on the side wall of the fixed frame (1) away from the motor (5); one end of an eccentric shaft (15) on the same side as the feed port (4) is rotatably connected to the feed port (4); a feed channel (24) is provided in the eccentric shaft (15) and the rotating shaft (6); and the feed channel (24) can be connected to the grinding gap through a plurality of groups of pipelines annularly distributed in the moving cylinder (7).

10. The water-soluble fertilizer particle grinding pretreatment equipment according to claim 7, characterized in that: The inner wall of the conical cylinder (3) is provided with friction patterns.

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