Chemical fertilizer cooling device

Abstract

The application relates to the field of chemical fertilizer processing equipment, and discloses a chemical fertilizer cooling device. In the using process of the air cooling mechanism, air in the roller flows from the discharging end of the roller to the sealing cover, so that the air cooling can be accelerated in the lifting and falling process of the chemical fertilizer particles under the action of the roller rolling and the lifting plate; and in the cooling process of the chemical fertilizer particles, the lifting plate and the chemical fertilizer particles in the roller also have more contact, at this time, the ice water in an ice water tank is taken by a water bailing device and then is sprinkled to the circumferential side of the roller and the internal cavity of the lifting plate through the through hole, so that the temperature difference between the roller and the lifting plate is reduced, the heat exchange efficiency is improved, the cooling efficiency of the chemical fertilizer particles is improved, and finally the cooling efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of chemical fertilizer processing equipment, in particular to a chemical fertilizer cooling device. BACKGROUND

[0002] Chemical fertilizer (also known as chemical fertilizer particles) refers to a general term for fertilizers containing nitrogen, phosphorus, potassium and other elements produced by chemical methods, including nitrogen fertilizer, phosphorus fertilizer, potassium fertilizer, micro-fertilizer, compound fertilizer, etc. After the production of chemical fertilizer particles, they need to be cooled by a roller cooler.

[0003] For example, the Chinese patent with the authorization announcement number CN210512321U discloses a "roller cooler for chemical fertilizer production". The roller cooler is driven to rotate by a driving motor, a gear disc, a rotating gear ring and a transmission chain, so that the internal chemical fertilizer particles are shaken and dispersed, thereby improving the cooling effect of the chemical fertilizer particles. In combination with the internal distribution plate and the turnover plate, the dispersion of the chemical fertilizer particles can be accelerated, so that most of the chemical fertilizer particles can contact the wall of the roller cooler, thereby ensuring that most of the chemical fertilizer particles can be effectively cooled. However, in the above-mentioned roller cooler, only the water cooling method is used to accelerate the cooling, resulting in a relatively low cooling efficiency. SUMMARY

[0004] The purpose of the present application is to provide a chemical fertilizer cooling device with the function of improving the cooling efficiency.

[0005] The above technical purpose of the present application is realized by the following technical scheme: a chemical fertilizer cooling device, comprising a base, a front bracket arranged on the base, a rear bracket arranged on the base, a roller rotatably connected between the front bracket and the rear bracket and having a lifting plate inside, a cover rotatably connected with one end of the roller and arranged on the base, a feeding pipe arranged on the cover and extending into the roller, a driving mechanism arranged at the middle part of the base and the roller and achieving the rotation of the roller, an air cooling mechanism and a water cooling mechanism, a plurality of annular rings are arranged between the front bracket and the rear bracket on the circumferential side of the roller, a plurality of lifting plates in the area corresponding to the adjacent two annular rings in the roller are first distributed along the circumferential direction of the roller and then distributed along the axial direction of the roller, the lifting plate is hollow, the lifting plate extends along the radial direction of the roller, one end of the lifting plate close to the middle part of the roller is bent towards the rotation direction of the roller, and a through hole is arranged on the circumferential side of the roller and communicates with the internal cavity of the lifting plate; the air cooling mechanism comprises an air outlet pipe arranged on the top of the cover and a air extractor connected with the air outlet pipe; the water cooling mechanism comprises an ice water tank arranged on the base and located between the front bracket and the rear bracket, a plurality of water extractors arranged between the adjacent two annular rings and drawing the ice water in the ice water tank during the rotation of the roller, and the water extractors pour the drawn ice water on the circumferential side of the roller and into the internal cavity of the lifting plate during the rotation of the roller.

[0006] By adopting the technical scheme, in the use process of the air cooling mechanism, the air in the drum flows from the discharging end of the drum to the cover, so that the air cooling is accelerated during the lifting and falling of the fertilizer particles under the rolling of the drum and the lifting of the lifting plate; and during the cooling of the fertilizer particles, the lifting plate and the fertilizer particles in the drum also have more contact, at this time, the ice water in the ice water tank is drawn by the water scooper and then sprayed to the drum side and poured into the internal cavity of the lifting plate through the through hole, so that the temperature difference between the drum and the lifting plate is reduced, the heat exchange efficiency is improved, and the cooling efficiency of the fertilizer particles is improved.

[0007] The further arrangement of the application is that the water scooper comprises a plurality of circumferential arrayed water scoops which are open at the side of the drum and close to the surface of the drum, an elastic expansion assembly arranged between the drum and the water scoops and driving the water scoops to move away from the drum along the radial direction of the drum, a rubber sealing ring arranged at the opening side of the water scoops, a driving assembly arranged between the ice water tank and the water scoops and overcoming the elastic force of the elastic expansion assembly to make the rubber sealing ring tightly contact the side of the drum when the water scoops do not separate from the liquid surface in the ice water tank, and a plurality of through holes corresponding to the water scoops and arranged along the axial direction of the drum between the two annular rings; the position of the water scoops at the bottom of the drum is the initial state, the driving assembly overcomes the elastic force of the elastic expansion assembly to make the rubber sealing ring tightly contact the side of the drum and align the through holes within the rotation range of 20 degrees of the water scoops, and the driving assembly and the water scoops are separated within the rotation range of 130-150 degrees of the water scoops.

[0008] By adopting the technical scheme, the fertilizer particles are lifted and fall under the action of the drum and the lifting plate, the drum is at the bottom as the initial point, the fertilizer particles on the lifting plate are accumulated at the connection between the lifting plate and the drum under the action of gravity when the drum rotates less than 90 degrees, the fertilizer particles on the lifting plate begin to slide due to the inclination of the lifting plate when the drum rotates more than 90 degrees, so as to gradually separate from the inner wall of the drum and spread on the lifting plate, and the fertilizer particles on the lifting plate completely slide off when the drum continues to rotate to 180 degrees.

[0009] Based on the state of the above-mentioned chemical fertilizer particles, the working principle and effect of the designed water cooling mechanism are as follows: the water scooper can move towards the direction away from the roller in the elastic extension assembly, when the water scooper is at the bottom with the rotation of the roller, it is convenient to enter the cold water tank to realize the scooping of cold water, at the same time, when the water scooper rotates in the range of 20 degrees and is separated from the liquid surface of the ice water tank, the driving assembly overcomes the elastic force of the elastic extension assembly, so that the rubber sealing ring of the opening edge of the water scooper is attached to the side of the roller, the ice water in the water scooper cools the roller, so as to improve the cooling effect of the inner wall of the roller on the chemical fertilizer particles; and during the rotation of the water scooper, the ice water in the water scooper can also flow into the internal cavity of the lifting plate (the internal cavity can be basically filled when the water scooper rotates to 90 degrees), at this time, the contact area between the lifting plate and the chemical fertilizer particles also starts to increase, so as to improve the cooling effect of the lifting plate on the chemical fertilizer particles; then, when the water scooper is separated from the driving assembly in the range of 130-150 degrees, the elastic extension assembly drives the water scooper to move towards the direction away from the roller and open, so that the water flow in the water scooper flows down in the range where the roller exchanges heat with the chemical fertilizer particles, realizing the water cooling of the side of the roller, and at this time, the water in the internal cavity of the lifting plate will not flow out, which can continue to ensure the cooling effect on the chemical fertilizer particles; during the rotation of the roller from 180 to 360 degrees, the water in the internal cavity of the lifting plate gradually flows out.

[0010] Further provided in the application is that the elastic extension assembly comprises a plurality of connecting plates arranged on both sides of the water scooper, a plurality of extension shafts arranged on the side of the roller and penetrating through the connecting plates, a anti-loosening nut threadedly connected to the end of the extension shaft, and a compression spring sleeved on the extension shaft and abutting against the roller and the connecting plate.

[0011] By adopting the above technical scheme, under the action of the compression spring, the water scooper can be driven to move towards the direction away from the roller, so that the water scooper is separated from the roller, the function that the water scooper is convenient to scoop ice water when the water scooper is at the bottom of the roller is met, and the function that the ice water in the water scooper cools the side of the roller after the water scooper is separated from the roller when the water scooper rotates in the range of 130-150 degrees is met.

[0012] Further provided in the application is that the driving assembly comprises two guide rails arranged at the corresponding annular rings of the ice water tank, two connecting brackets arranged between the guide rails and the ice water tank, and two guide shafts arranged at both ends of the water scooper and moving along the guide rails, the guide rail comprising a driving part for the guide shaft of the water scooper at the bottom of the roller to gradually overcome the elastic force of the elastic extension assembly so that the rubber sealing ring is attached to the side of the roller, and a retaining part for keeping the state that the rubber sealing ring is attached to the side of the roller.

[0013] By adopting the technical scheme, the driving part of the guide track is arranged to gradually overcome the elastic force of the elastic telescopic component, so as to realize the purpose that the rubber sealing ring of the water scooper is attached to the periphery of the roller, and the arrangement of the retaining part can keep the rubber sealing ring in the state of being attached to the periphery of the roller.

[0014] Further, the application is arranged that an arc-shaped plate is arranged between the two guide tracks of the same driving component and away from the end surface of the roller.

[0015] By adopting the technical scheme, when the water scooper is separated from the driving component in the range of 130-150 degrees, the elastic telescopic component drives the water scooper to move away from the roller and open, and the arrangement of the arc-shaped plate can prevent the water splashing to the periphery of the roller.

[0016] Further, the application is arranged that the length of the compression spring when not subjected to external force is half of the maximum telescopic stroke of the water scooper along the telescopic shaft.

[0017] By adopting the technical scheme, when the water scooper is at the lowest position of the roller, the water scooper can also move downward under the action of gravity, so that the function of water scooping is easily satisfied, and when the water scooper rotates to the range of 130-150 degrees, only the gap between the rubber sealing ring of the water scooper and the roller is needed to make the ice water flow out; at this time, the length of the compression spring is reduced, so that the force required for the driving component to overcome the elastic telescopic component is reduced.

[0018] Further, the application is arranged that the cross section of the water scooper is in the shape of "U", the bottom of the water scooper is provided with notches extending to both sides, flexible sealing rubber sheets are arranged at the notches, arc-shaped extrusion protruding parts corresponding to the notches are arranged on the arc-shaped plate, the starting point of the arc-shaped extrusion protruding parts corresponds to the starting point of the retaining part, and the water scooper is extruded by the arc-shaped extrusion protruding parts during the rotation of the roller, so that the ice water in the water scooper is extruded into the internal cavity of the material lifting plate.

[0019] By adopting the technical scheme, the flexible sealing rubber sheets are arranged at the notches of the water scooper, the extrusion protruding parts on the arc-shaped plate extrude the flexible sealing rubber sheets, so that when the rubber sealing ring of the water scooper is attached to the periphery of the roller, the water in the water scooper is extruded into the internal cavity of the material lifting plate in the form of extrusion, and the cooling effect of the material lifting plate on the fertilizer particles is improved.

[0020] The further arrangement of the present application is that the cross section of the dipper is in the shape of "U", the bottom of the dipper is provided with a gas bag in flat state in normal condition, the rubber sealing ring is hollow, a communication hose is arranged between the rubber sealing ring and the gas bag, in the process that the dipper is driven by the driving assembly to make the rubber sealing ring tightly contact the circumferential side of the roller, the rubber sealing ring is extruded to make the gas flow into the gas bag, the ice water in the dipper is extruded into the internal cavity of the lifting plate after the expansion of the gas bag.

[0021] By adopting the above technical scheme, in the process that the dipper is driven by the driving assembly to make the rubber sealing ring tightly contact the circumferential side of the roller, the rubber sealing ring is extruded to make the gas flow into the gas bag, the ice water in the dipper is extruded into the internal cavity of the lifting plate after the expansion of the gas bag, the cooling effect of the lifting plate on the fertilizer particles is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0023] Figure 1 is a structural schematic diagram of embodiment 1;

[0024] Figure 2 is a partial structural schematic diagram of embodiment 1;

[0025] Figure 3 is a structural sectional view of embodiment 1;

[0026] Figure 4 is Figure 3 is a partial enlarged view of A in FIG. 1;

[0027] Figure 5 is Figure 2 is a partial enlarged view of B in FIG. 1;

[0028] Figure 6 is a partial enlarged view of the elastic stretching assembly in embodiment 2;

[0029] Figure 7 is a structural sectional view of embodiment 3;

[0030] Figure 8 is a partial enlarged view of the dipper in embodiment 4.

[0031] In the figure: 1, base; 2, front bracket; 3, rear bracket; 4, roller; 41, material lifting plate; 42, through hole; 43, annular ring; 5, cover; 6, feeding pipe; 7, driving mechanism; 8, air cooling mechanism; 81, air outlet pipe; 82, air extractor; 9, water cooling mechanism; 91, ice water tank; 92, water scooper; 921, water scooper bucket; 9211, notch; 9212, flexible sealing rubber sheet; 9213, air bag; 9214, communication hose; 922, elastic telescopic assembly; 9221, connecting sheet; 9222, telescopic shaft; 9223, anti-falling nut; 9224, compression spring; 923, rubber sealing ring; 924, driving assembly; 9241, guide rail; 92411, driving part; 92412, retaining part; 9242, connecting support; 9243, guide shaft; 925, arc-shaped plate; 9251, arc-shaped extrusion protruding part. DETAILED DESCRIPTION

[0032] The technical solutions of the present application will be described clearly and completely below in combination with specific embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0033] Embodiment 1: a chemical fertilizer cooling device, as shown in Figure 1 and Figure 2 , comprising a base 1, a front bracket 2 arranged on the base 1, a rear bracket 3 arranged on the base 1, a roller 4 rotationally connected between the front bracket 2 and the rear bracket 3 and having a material lifting plate 41 inside, a cover 5 arranged on the base 1 and rotationally connected with one end of the roller 4, a feeding pipe 6 arranged on the cover 5 and extending into the roller 4, a driving mechanism 7 arranged in the middle of the base 1 and the roller 4 and achieving rotation of the roller 4, an air cooling mechanism 8, and a water cooling mechanism 9.

[0034] As shown in Figure 1 and Figure 2 , the roller 4 is slightly inclined toward the discharge end as a whole (the inclination angle is 0.5 degrees in this embodiment), a plurality of annular rings 43 are arranged on the circumference of the roller 4 between the front bracket 2 and the rear bracket 3, the plurality of material lifting plates 41 in the area corresponding to the adjacent two annular rings 43 in the roller 4 are first distributed along the axial circumferential direction of the roller 4 and then arranged along the axial direction of the roller 4, the material lifting plate 41 is hollowly arranged, the material lifting plate 41 extends along the radial direction of the roller 4, one end of the material lifting plate 41 close to the middle of the roller 4 is bent toward the rotation direction of the roller 4, and the circumference of the roller 4 is provided with a through hole 42 in communication with the internal cavity of the material lifting plate 41.

[0035] As shown in Figure 1As shown, the air-cooling mechanism 8 includes an air outlet pipe 81 disposed on the top of the cover 5 and an exhaust fan 82 connected to the air outlet pipe 81.

[0036] like Figures 2 to 4 As shown, the water cooling mechanism 9 includes an ice water tank 91 disposed on the base 1 and located between the front bracket 2 and the rear bracket 3, and a plurality of water pumps 92 disposed between two adjacent annular rings 43 and drawing ice water from the ice water tank 91 as the drum 4 rotates. The water pumps 92 spray the drawn ice water around the drum 4 and pour it into the internal cavity of the lifting plate 41 through the through hole 42 as the drum 4 rotates.

[0037] like Figures 2 to 5 As shown, the water feeder 92 includes multiple water hoppers 921 arranged in a circumferential array around the roller 4 and open near the surface of the roller 4; an elastic telescopic component 922 disposed between the roller 4 and the water hoppers 921 and driving the water hoppers 921 to move away from the roller 4 radially; a rubber sealing ring 923 disposed around the opening of the water hoppers 921; a drive component 924 disposed between the ice water tank 91 and the water hoppers 921 and overcoming the elastic force of the elastic telescopic component 922 so that the rubber sealing ring 923 is pressed tightly against the roller 4 when the water hoppers 921 are not removed from the liquid surface in the ice water tank 91; and multiple through holes 42 corresponding to the same water hopper 921 located between two annular rings 43 and arranged along the axial direction of the roller 4. With the water-drawing bucket 921 positioned at the bottom of the drum 4 as the initial state, within a 20-degree rotation range of the water-drawing bucket 921, the drive assembly 924 overcomes the elastic force of the elastic telescopic assembly 922 so that the rubber sealing ring 923 is tightly attached to the periphery of the drum 4 and aligned with multiple through holes 42. Within a 130-150 degree rotation range of the water-drawing bucket 921, the drive assembly 924 and the water-drawing bucket 921 separate.

[0038] like Figure 2 and Figure 5As shown, the elastic expansion assembly 922 includes a plurality of connecting plates 9221 arranged on both sides of the water scoop 921, a plurality of expansion shafts 9222 arranged on the circumference of the drum 4 and passing through the connecting plates 9221, anti-loose nuts 9223 threadedly connected to the ends of the expansion shafts 9222, and compression springs 9224 sleeved on the expansion shafts 9222 and abutting against the drum 4 and the connecting plates 9221. The driving assembly 924 includes two guide rails 9241 arranged at the corresponding annular rings 43 of the ice-water tank 91, two connecting brackets 9242 arranged between the guide rails 9241 and the ice-water tank 91, and two guide shafts 9243 arranged at both ends of the water scoop 921 and moving along the guide rails 9241. The guide rails 9241 include a driving portion 92411 for the guide shaft 9243 of the water scoop 921 located at the bottom of the drum 4 to gradually overcome the elastic force of the elastic expansion assembly 922 after entering the rear portion so that the rubber sealing ring 923 is tightly attached to the circumference of the drum 4, and a retaining portion 92412 for maintaining the state that the rubber sealing ring 923 is tightly attached to the circumference of the drum 4. Meanwhile, the two guide rails 9241 of the same driving assembly 924 are provided with an arc-shaped plate 925 between the end faces away from the drum 4.

[0039] Effect: During use, the air in the drum 4 flows from the discharge end of the drum 4 towards the cover 5, so that the fertilizer particles can be accelerated and cooled by air cooling during the lifting and falling process under the action of the lifting plate 41 and the drum 4; and during the cooling process of the fertilizer particles, the lifting plate 41 and the fertilizer particles in the drum 4 also have more contact, at which time the ice water in the ice-water tank 91 is drawn by the water scoop 92 and sprayed to the circumference of the drum 4 and the internal cavity of the lifting plate 41 from the through hole 42, so as to reduce the temperature difference between the drum 4 and the lifting plate 41, thereby improving the heat exchange efficiency and the efficiency of the fertilizer particles; finally, the cooling efficiency is improved.

[0040] The fertilizer particles are lifted and dropped by the rotation of the roller 4 and the action of the lifting plate 41. When the roller 4 is at the bottom as the initial point, the fertilizer particles on the lifting plate 41 are accumulated at the joint of the lifting plate 41 and the roller 4 under the action of gravity when the roller 4 rotates less than 90 degrees. When the roller 4 rotates more than 90 degrees, the fertilizer particles on the lifting plate 41 begin to slide due to the inclination of the lifting plate 41, so as to gradually separate from the inner wall of the roller 4 and spread on the lifting plate 41. When the roller 4 continues to rotate to 180 degrees, the fertilizer particles on the lifting plate 41 completely slide off. Based on the above state of the fertilizer particles, the working principle and effect of the water cooling mechanism 9 are as follows: the water bucket 921 can move away from the roller 4 by the elastic extension assembly 922. When the water bucket 921 is at the bottom with the rotation of the roller 4, it is convenient to enter the cold water tank to draw cold water. When the water bucket 921 rotates within a range of 20 degrees and is separated from the liquid surface of the ice water tank 91, the driving assembly 924 overcomes the elastic force of the elastic extension assembly 922, so that the rubber sealing ring 923 at the opening edge of the water bucket 921 is attached to the side of the roller 4. The ice water in the water bucket 921 cools the roller 4, so as to improve the cooling effect of the inner wall of the roller 4 on the fertilizer particles. During the rotation of the water bucket 921, the ice water in the water bucket 921 can also flow into the internal cavity of the lifting plate 41 (the internal cavity is basically filled when the water bucket 921 rotates to 90 degrees). At this time, the contact area between the lifting plate 41 and the fertilizer particles begins to increase, so as to improve the cooling effect of the lifting plate 41 on the fertilizer particles. Then, when the water bucket 921 is separated from the driving assembly 924 within a range of 130-150 degrees, the elastic extension assembly drives the water bucket 921 to move away from the roller 4 and open, so that the water in the water bucket 921 flows in the range where the roller 4 exchanges heat with the fertilizer particles and then flows down, so as to cool the side of the roller 4. At this time, the water in the internal cavity of the lifting plate 41 does not flow out, so as to continue to ensure the cooling effect on the fertilizer particles. During the rotation of the roller 4 from 180 to 360 degrees, the water in the internal cavity of the lifting plate 41 gradually flows out.

[0041] Example 2: A fertilizer cooling device, as shown in Figure 6 The length of the compression spring 9224 when not subjected to external force is half of the maximum extension stroke of the water bucket 921 along the extension shaft 9222.

[0042] The implementation effect is that when the water scooper 921 is at the lowermost position of the roller 4, the water scooper 921 can also move downward under the action of gravity, the water scooping function is easily satisfied, the water scooper 921 rotates to a range of 130-150 degrees, and only a gap between the rubber sealing ring 923 of the water scooper 921 and the roller 4 is needed to make the ice water flow out; at this time, the length of the compression spring 9224 is reduced, and thus the force required for the driving assembly 924 to overcome the elastic extension assembly 922 is reduced.

[0043] Embodiment 3: a chemical fertilizer cooling device, as shown in Figure 7 The difference from embodiment 1 is that the cross section of the water scooper 921 is in the shape of a “U” letter, the bottom of the water scooper 921 is provided with notches 9211 extending to both sides, flexible sealing rubber sheets 9212 are arranged at the notches 9211, arc-shaped extrusion protruding parts 9251 corresponding to the notches 9211 are arranged on the arc-shaped plate 925, the starting points of the arc-shaped extrusion protruding parts 9251 correspond to the starting points of the retaining parts 92412, and the water scooper 921 is extruded by the arc-shaped extrusion protruding parts 9251 during the rotation of the roller 4, so that the ice water in the water scooper 921 is extruded into the internal cavity of the material lifting plate 41.

[0044] The implementation effect is that the flexible sealing rubber sheets 9212 are arranged at the notches 9211 of the water scooper 921, and the extrusion protruding parts on the arc-shaped plate 925 extrude the flexible sealing rubber sheets 9212, so that when the rubber sealing ring 923 of the water scooper 921 is attached to the side of the roller 4, the water in the water scooper 921 is extruded into the internal cavity of the material lifting plate 41 in the form of extrusion, and the cooling effect of the material lifting plate 41 on the chemical fertilizer particles is improved.

[0045] Embodiment 4: a chemical fertilizer cooling device, as shown in Figure 8 The difference from embodiment 1 is that the cross section of the water scooper 921 is in the shape of a “U” letter, the bottom of the water scooper 921 is provided with air bags 9213 in a flat state under normal conditions, the rubber sealing ring 923 is hollowly arranged, a communication hose 9214 is arranged between the rubber sealing ring 923 and the air bags 9213, and during the process in which the rubber sealing ring 923 is tightly attached to the side of the roller 4 under the action of the driving assembly 924, the rubber sealing ring 923 is extruded to make the gas flow into the air bags 9213, and the air bags 9213 are inflated to drive the ice water in the water scooper 921 to be extruded into the internal cavity of the material lifting plate 41.

[0046] Implementation effect: in the process that the dipper 921 makes the rubber sealing ring 923 tightly contact the circumferential side of the roller 4 under the action of the driving assembly 924, the rubber sealing ring 923 is extruded to make the gas flow into the air bag 9213, and after the air bag 9213 is inflated, the ice water in the inside of the dipper 921 is extruded into the internal cavity of the lifting plate 41, so that the cooling effect of the lifting plate 41 on the fertilizer particles is improved.

Claims

1. A fertilizer cooling device, comprising a base (1), a front bracket (2) disposed on the base (1), a rear bracket (3) disposed on the base (1), a drum (4) rotatably connected between the front bracket (2) and the rear bracket (3) and having a lifting plate (41) inside, a cover (5) disposed on the base (1) and rotatably connected to one end of the drum (4), a feed pipe (6) disposed on the cover (5) and extending into the drum (4), a drive mechanism (7) disposed in the middle of the base (1) and the drum (4) and driving the drum (4) to rotate, an air cooling mechanism (8) and a water cooling mechanism (9), characterized in that: Multiple annular rings (43) are arranged around the drum (4) between the front bracket (2) and the rear bracket (3). Multiple lifting plates (41) in the area of ​​two adjacent annular rings (43) inside the drum (4) are first arranged in a circular array along the axial direction of the drum (4) and then arranged along the axial direction of the drum (4). The lifting plates (41) are hollow and extend radially along the drum (4). The end of the lifting plate (41) near the middle of the drum (4) is bent toward the rotation direction of the drum (4). Through holes (42) communicating with the internal cavity of the lifting plates (41) are provided around the drum (4). The air-cooling mechanism (8) includes an air outlet pipe (81) installed on the top of the cover (5) and an exhaust fan (82) connected to the air outlet pipe (81); The water cooling mechanism (9) includes an ice water tank (91) set on the base (1) and located between the front bracket (2) and the rear bracket (3), and a plurality of water pumps (92) respectively set between two adjacent annular rings (43) and drawing ice water from the ice water tank (91) as the drum (4) rotates. The water pumps (92) spray the drawn ice water around the drum (4) and pour it into the internal cavity of the lifting plate (41) through the through hole (42) as the drum (4) rotates.

2. The fertilizer cooling device according to claim 1, characterized in that: The water feeder (92) includes multiple water hoppers (921) arranged in a circular array around the drum (4) and open near the surface of the drum (4); an elastic telescopic component (922) disposed between the drum (4) and the water hopper (921) and driving the water hopper (921) to move away from the drum (4) along the radial direction of the drum (4); a rubber sealing ring (923) disposed around the opening of the water hopper (921); a drive component (924) disposed between the ice water tank (91) and the water hopper (921) and overcoming the elastic force of the elastic telescopic component (922) so that the rubber sealing ring (923) is pressed against the drum (4) when the water hopper (921) is not removed from the liquid surface in the ice water tank (91); and multiple through holes (42) corresponding to the same water hopper (921) located between two annular rings (43) and arranged along the axial direction of the drum (4). With the water-drawing bucket (921) positioned at the bottom of the drum (4) as the initial state, within a 20-degree rotation range of the water-drawing bucket (921), the drive assembly (924) overcomes the elastic force of the elastic telescopic assembly (922) so that the rubber sealing ring (923) is tightly attached to the periphery of the drum (4) and aligned with multiple through holes (42). Within a 130-150 degree rotation range of the water-drawing bucket (921), the drive assembly (924) and the water-drawing bucket (921) separate.

3. The fertilizer cooling device according to claim 2, characterized in that: The elastic telescopic assembly (922) includes multiple connecting pieces (9221) disposed on both sides of the water-drawing bucket (921), multiple telescopic shafts (9222) disposed on the periphery of the drum (4) and passing through the connecting pieces (9221), anti-loosening nuts (9223) threaded to the end of the telescopic shafts (9222), and compression springs (9224) sleeved on the telescopic shafts (9222) and pressed against the drum (4) and the connecting pieces (9221).

4. A fertilizer cooling device according to claim 3, characterized in that: The drive assembly (924) includes two guide rails (9241) located at the corresponding annular ring (43) of the ice water tank (91), two connecting brackets (9242) located between the guide rails (9241) and the ice water tank (91), and two guide shafts (9243) located at both ends of the water hopper (921) and moving along the guide rails (9241). The guide rails (9241) include a drive part (92411) for the guide shaft (9243) of the water hopper (921) located at the bottom of the drum (4) to enter and gradually overcome the elastic force of the elastic telescopic assembly (922) so that the rubber sealing ring (923) is pressed against the circumference of the drum (4), and a holding part (92412) for keeping the rubber sealing ring (923) pressed against the circumference of the drum (4).

5. A fertilizer cooling device according to claim 4, characterized in that: An arc plate (925) is provided between the end faces of the two guide rails (9241) of the same drive assembly (924) away from the roller (4).

6. A fertilizer cooling device according to claim 5, characterized in that: The length of the compression spring (9224) when it is not subjected to external force is half of the maximum extension stroke of the water bucket (921) along the telescopic shaft (9222).

7. A fertilizer cooling device according to claim 5, characterized in that: The cross-section of the water-drawing bucket (921) is U-shaped. The bottom of the water-drawing bucket (921) is provided with notches (9211) extending to both sides. A flexible sealing rubber sheet (9212) is provided at the notch (9211). The arc plate (925) is provided with an arc-shaped extrusion protrusion (9251) corresponding to the notch (9211). The starting point of the arc-shaped extrusion protrusion (9251) corresponds to the starting point of the holding part (92412). The water-drawing bucket (921) is squeezed by the arc-shaped extrusion protrusion (9251) as the roller (4) rotates, so that the ice water in the water-drawing bucket (921) is squeezed into the internal cavity of the lifting plate (41).

8. A fertilizer cooling device according to claim 5, characterized in that: The cross-section of the water-drawing bucket (921) is U-shaped. The bottom of the water-drawing bucket (921) is provided with an air bladder (9213) that is flat in the normal state. The rubber sealing ring (923) is hollow. A connecting hose (9214) is provided between the rubber sealing ring (923) and the air bladder (9213). When the water-drawing bucket (921) is driven by the drive assembly (924) to press the rubber sealing ring (923) against the circumference of the roller (4), the rubber sealing ring (923) is squeezed to allow gas to flow into the air bladder (9213). After the air bladder (9213) expands, it drives the ice water inside the water-drawing bucket (921) to be squeezed into the internal cavity of the lifting plate (41).

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