Controlled-release fertilizer processing equipment

Abstract

The invention provides a controlled-release fertilizer processing device. The invention aims to solve the technical problem that the existing sustained and controlled release fertilizer processing equipment directly pumps a solvent dissolved with a coating material through a water pump and sprays the solvent, so that the dry and hard coating material can cause blockage after the solvent is volatilized in the idle period of the equipment. According to the technical scheme, the sustained and controlled release fertilizer processing equipment comprises a stirring tank, a feeding device and a spraying device, the spraying device comprises a liquid storage tank, a spraying pipe communicated to the bottom of the liquid storage tank, and a booster pump communicated to the top of the liquid storage tank; a feeding hole is formed in the top of the liquid storage tank and is matched with a feeding valve; the spray pipe is provided with a nozzle and an electric heating element. Gas is fed into the upper part of the liquid storage tank through the booster pump, and a solvent dissolved with a coating material is driven to enter the spray pipe from the lower part of the liquid storage tank and is sprayed through the spray head; and the solvent does not need to pass through the booster pump, so that normal operation of the booster pump can be prevented from being influenced by a dry and hard coating material generated in the booster pump.

Description

Technical Field

[0001] The invention relates to the technical field of production and processing of slow-release fertilizers, and in particular to a slow-release fertilizer processing device. Background Art

[0002] One of the commonly used production and processing methods for slow-release fertilizers is to coat the surface of water-soluble fertilizer particles with a semi-permeable or insoluble coating, so that the coated water-soluble fertilizer particles have the characteristic of slowly releasing nutrients.

[0003] In order to make the coating material evenly coated on the surface of the fertilizer particles, the coating material is usually dissolved in a solvent; then the fertilizer particles are stirred while the solvent containing the coating material is sprayed. While stirring, the fertilizer particles are heated to dry the solvent, so that the coating material remains on the surface of the fertilizer particles.

[0004] In actual production, slow-release fertilizers are often produced in batches according to production and sales conditions. Therefore, the staff will determine the required amount of coating material based on the production volume of the current batch of slow-release fertilizers, and prepare the solvent containing the coating material in a ready-to-use manner. On the other hand, the prior art generally directly extracts the solvent containing the coating material through a water pump, and sprays the solvent into the mixing tank through a nozzle installed in a spray pipe. When the equipment is idle, the solvent remaining in the water pump will gradually evaporate, and dried coating materials will appear in the water pump. When used next time, these dried coating materials will affect the normal operation of the water pump and may cause the downstream nozzles to become clogged. Summary of the invention

[0005] The object of the present invention is to provide a slow-release fertilizer processing equipment, which delivers gas to the upper part of a liquid storage tank through a booster pump, drives a solvent dissolved with a coating material into a spray pipe from the lower part of the liquid storage tank, and sprays the solvent into a stirring tank through a nozzle installed in the spray pipe; in this way, the solvent does not need to pass through the booster pump, which can prevent the booster pump from affecting normal operation due to the dry coating material generated inside.

[0006] To achieve the above object, the technical solution adopted by the present invention is: A controlled-release fertilizer processing device comprises: a stirring tank for stirring fertilizer particles, a feeding device for feeding fertilizer particles into the stirring tank, and a spray device for spraying solvent into the stirring tank; wherein the spray device comprises: a liquid storage tank, a spray pipe connected to the bottom of the liquid storage tank, and a booster pump connected to the top of the liquid storage tank; a feed port is provided on the top of the liquid storage tank and is adapted to a feed valve; a nozzle is installed on the portion of the spray pipe extending into the stirring tank; and an electric heating element is installed in the spray pipe.

[0007] Optionally, the spray pipe includes: a first connecting pipe, a liquid delivery pipe, and a sub-pipe connected in sequence; a first interface is provided on the top of the liquid storage tank to communicate with the first connecting pipe; the first interface is provided with an extension section extending to the lower part of the liquid storage tank; the sub-pipe is located in the mixing tank, and a plurality of sub-pipes are provided; each sub-pipe is respectively equipped with a nozzle; one end of the sub-pipe is provided with an internal thread, and the other end is provided with a matching external thread, and adjacent sub-pipes form a threaded connection; the sub-pipe farthest from the liquid delivery pipe is provided with a plug at the end away from the liquid delivery pipe; the electric heating element is provided at the end of the liquid delivery pipe corresponding to the first connecting pipe.

[0008] Optionally, it also includes: a first bracket; the first bracket includes: a support leg, a support platform located above the support leg, a vertical rod connecting the support leg and the support platform, and a clamping piece that presses the liquid delivery tube against the support platform; one side of the clamping piece is hinged to the support platform, and the other side is detachably connected to the support platform by bolts.

[0009] Optionally, the liquid storage tank is provided with a first hopper at a feed inlet, and a filter is provided in the first hopper.

[0010] Optionally, the feeding device includes: a second bracket, a second hopper installed on the second bracket, a guide pipe installed on the bottom of the second hopper, and a vertical elevator for conveying fertilizer particles to the second hopper; wherein the guide pipe includes: a feeding section extending in the up-down direction, a discharging section extending obliquely downward from left to right, and an arc section connecting the bottom of the feeding section and the top of the discharging section; the bottom of the discharging section extends into the feeding port of the mixing tank; an arc-shaped first groove extending along the hopper wall is provided on the left side of the bottom of the second hopper; an annular ridge surrounding the outer wall is provided on the top of the feeding section; the left part of the annular ridge cooperates with the first groove, and is adapted to lock the annular ridge in the first groove. The locking piece.

[0011] Optionally, the right side of the bottom of the second hopper is provided with an arc-shaped limiting edge extending along the hopper wall; the locking piece is provided with an arc-shaped second slot; the right part of the annular edge and the limiting edge cooperate with the second slot; the rear part of the locking piece is hinged to the rear part of the second hopper, and the hinge axis is facing up and down; the front part of the locking piece is provided with a threaded hole passing through the front and back, and is adapted to a threaded positioning rod; the front side of the bottom of the second hopper is provided with a positioning hole to cooperate with the positioning rod to position the locking piece.

[0012] Optionally, the stirring tank lies horizontally on the base; a discharge port is provided at the bottom of the stirring tank and is adapted to a first valve; a hollow spiral blade is provided in the stirring tank and is adapted to a motor for driving the hollow spiral blade to rotate; a plurality of flipping plates are provided along the extension direction of the hollow spiral blade; the width direction of the flipping plate is parallel to the axial direction of the hollow spiral blade to form an inner edge and an outer edge parallel to the axis of the hollow spiral blade; the length direction of the flipping plate corresponds to the radial direction of the hollow spiral blade to form a radial edge extending radially along the hollow spiral blade.

[0013] Optionally, the mixing tank includes: a cylindrical main body section, and a feeding section connected to the left end of the main body section; the mixing tank has a feeding port at the left end of the feeding section, and a discharge port at the right end of the bottom of the main body section; the diameter of the feeding section gradually increases from left to right; the diameter of the right end of the feeding section is smaller than the diameter of the main body section, and the left end of the main body section is provided with an inner ring portion extending along the inner circumferential wall to form a connection with the feeding section; the right end of the main body section is open and adapted to a cover; the right end of the main body section is provided with an outer ring portion extending along the outer circumferential wall, and the outer ring portion is detachably connected to the cover by bolts.

[0014] Optionally, a first ring portion is provided at the left end of the hollow spiral blade, and the first ring portion is rotationally connected to the inner ring portion via a first swivel bearing; a second ring portion is provided at the right end of the hollow spiral blade, and the second ring portion is rotationally connected to the cover via a second swivel bearing.

[0015] Optionally, the second ring portion is installed on the inner ring of the second slewing bearing; the inner ring of the second slewing bearing is provided with internal teeth and forms a transmission connection with the gear; the motor drives the hollow spiral blade to rotate by driving the gear to rotate; the motor is installed on the right side wall of the cover, and the cover is provided with an axial hole through which the rotating shaft of the power supply motor passes.

[0016] The working principle of the present invention is as follows: the fertilizer particles are sent into the stirring tank. The coating material is dissolved in the solvent; the feed valve is opened, and the solvent containing the coating material is poured into the liquid storage tank; then the feed valve is closed. The booster pump is turned on, and gas is fed into the top of the liquid storage tank to increase the pressure in the liquid storage tank; in this way, the solvent can enter the spray pipe from the bottom of the liquid storage tank and be sprayed into the stirring tank through the nozzle installed on the spray pipe. While spraying the solvent, the stirring tank is made to stir the fertilizer particles so that the solvent and the fertilizer particles are evenly mixed. When the solvent in the liquid storage tank is sprayed, the gas fed into the liquid storage tank by the booster pump will be blown into the stirring tank through the nozzle of the spray pipe; at this time, the electric heating element is turned on to heat the gas flowing through the spray pipe, thereby blowing a hot air flow into the stirring tank for drying.

[0017] It can be seen that the beneficial effects of the present invention are: gas is sent to the upper part of the liquid storage tank through the booster pump, driving the solvent dissolved with the coating material to enter the spray pipe from the lower part of the liquid storage tank, so as to spray the solvent into the stirring tank through the nozzle installed in the spray pipe; in this way, the solvent does not need to pass through the booster pump, which can prevent the booster pump from affecting the normal operation due to the dry coating material generated inside. In addition, when the solvent in the liquid storage tank is sprayed, the gas sent into the liquid storage tank by the booster pump will be blown into the stirring tank through the nozzle of the spray pipe; in this process, the solvent remaining in the spray pipe and the nozzle will be blown into the stirring tank together, thereby greatly reducing the residual solvent in the spray pipe and the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the spray device; Figure 3 for Figure 2 Enlarged view of part A in the middle; Figure 4 This is a schematic diagram of the assembly of the spray pipe; Figure 5 It is a top view of the liquid storage tank; Figure 6 for Figure 5 AA section view; Figure 7 It is a schematic diagram of the connection between the second hopper and the material guide pipe; Figure 8 It is a schematic diagram of the assembly of the second hopper and the material guide pipe; Fig. 9 A schematic diagram of providing a locking member for the second hopper; Fig.10 It is a structural schematic diagram of a mixing tank; Fig.11 It is a schematic diagram of the assembly of the stirring tank and the hollow spiral blade; Fig.12 It is a schematic diagram of the assembly of the hollow spiral blade and the first slewing bearing and the second slewing bearing; Fig.13 It is a schematic diagram of the assembly of the hollow spiral blade and the turning plate.

[0020] Figure numerals: 1, stirring tank; 2, liquid storage tank; 3, spray pipe; 4, booster pump; 5, feed valve; 6, nozzle; 7, first connecting pipe; 8, liquid delivery pipe; 9, sub-pipe; 10, first interface; 11, plug; 12, first bracket; 13, support platform; 14, pressing piece; 15, first hopper; 16, second hopper; 17, second hopper; 18, guide pipe; 19, vertical elevator; 20, feed section; 21, discharge section; 22, first slot; 23, annular edge; 24 , locking member; 25, limiting edge; 26, second slot; 27, positioning rod; 28, positioning hole; 29, base; 30, discharge port; 31, hollow spiral blade; 32, motor; 33, flip plate; 34, main section; 35, feeding section; 36, feeding port; 37, inner ring; 38, cover; 39, outer ring; 40, first ring; 41, first slewing bearing; 42, second ring; 43, second slewing bearing; 44, gear; 45, connecting part; 46, extension section. DETAILED DESCRIPTION

[0021] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0022] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention.

[0026] The following is combined with Figure 1 ~Attached Fig.13 Embodiments of the present invention are described in detail.

[0027] The embodiment of the present invention provides a slow-release fertilizer processing equipment. The slow-release fertilizer processing equipment includes: a stirring tank 1 for stirring fertilizer particles, a feeding device for feeding fertilizer particles into the stirring tank 1, and a spray device for spraying solvent into the stirring tank 1. Among them, the spray device includes: a liquid storage tank 2, a spray pipe 3 connected to the bottom of the liquid storage tank 2, and a booster pump 4 connected to the top of the liquid storage tank 2. The top of the liquid storage tank 2 is provided with a feed port and is adapted to a feed valve 5. The part of the spray pipe 3 extending into the stirring tank 1 is installed with a nozzle 6. An electric heating element is installed in the spray pipe 3. It should be understood that the electric heating element can be an electric heating wire, a thermistor, a conductive coating or an electric heating film. When the nozzle 6 no longer sprays out the solvent, it means that the solvent in the liquid storage tank 2 has been basically sprayed out, and the solvent remaining in the spray pipe 3 and the nozzle 6 has also been basically blown out into the stirring tank 1; at this time, the electric heating element can be turned on to heat the gas blown into the stirring tank 1 later for drying.

[0028] The specific implementation of the present invention is described below: Fertilizer particles are fed into the stirring tank 1. The coating material is dissolved in the solvent; the feed valve 5 is opened, and the solvent containing the coating material is poured into the liquid storage tank 2; then the feed valve 5 is closed. The booster pump 4 is turned on, and gas is fed from the top of the liquid storage tank 2 to increase the pressure in the liquid storage tank 2; in this way, the solvent can enter the spray pipe 3 from the bottom of the liquid storage tank 2, and be sprayed into the stirring tank 1 through the nozzle 6 installed on the spray pipe 3. While spraying the solvent, the stirring tank 1 is made to stir the fertilizer particles so that the solvent and the fertilizer particles are evenly mixed. When the solvent in the liquid storage tank 2 is sprayed, the gas fed into the liquid storage tank 2 by the booster pump 4 will be blown into the stirring tank 1 through the nozzle 6 of the spray pipe 3; at this time, the electric heating element is turned on to heat the gas flowing through the spray pipe 3, so that a hot air flow is blown into the stirring tank 1 for drying. The present invention delivers gas to the upper part of the liquid storage tank 2 through the booster pump 4, drives the solvent containing the coating material dissolved therein to enter the spray pipe 3 from the lower part of the liquid storage tank 2, and sprays the solvent into the stirring tank 1 through the nozzle 6 installed on the spray pipe 3; in this way, the solvent does not need to pass through the booster pump 4, and the normal operation of the booster pump 4 can be prevented from being affected by the dry coating material generated inside. In addition, when the solvent in the liquid storage tank 2 is sprayed, the gas delivered to the liquid storage tank 2 by the booster pump 4 will be blown into the stirring tank 1 through the nozzle 6 of the spray pipe 3; in this process, the solvent remaining in the spray pipe 3 and the nozzle 6 will be blown into the stirring tank 1 together, thereby greatly reducing the solvent remaining in the spray pipe 3 and the nozzle 6.

[0029] Further, the spray pipe 3 includes: a first connecting pipe 7, a liquid delivery pipe 8, and a sub-pipe 9 connected in sequence; a first interface 10 is provided on the top of the liquid storage tank 2 to communicate with the first connecting pipe 7; the first interface 10 is provided with an extension section 46 extending to the lower part of the liquid storage tank 2; the sub-pipe 9 is located in the mixing tank 1, and multiple sub-pipes 9 are provided; each sub-pipe 9 is respectively installed with a nozzle 6; one end of the sub-pipe 9 is provided with an internal thread, and the other end is provided with a matching external thread, and adjacent sub-pipes 9 form a threaded connection; the sub-pipe 9 farthest from the liquid delivery pipe 8 is provided with a plug 11 at the end away from the liquid delivery pipe 8; the electric heating element is provided at one end of the liquid delivery pipe 8 corresponding to the first connecting pipe 7. It should be understood that an external thread can be provided on the first interface 10; the first connecting pipe 7 can be a common connecting hose available on the market, the main body of which can be bent, and the two ends are respectively covered with a rotatable internal thread joint, and a sealing ring is provided in the joint. The two ends of the liquid delivery pipe 8 are respectively threadedly connected with the first connecting pipe 7 and the corresponding sub-pipe 9. The electric heating element is arranged at one end of the liquid delivery pipe 8 close to the first connecting pipe 7. The first connecting pipe 7 can be disassembled from the liquid delivery pipe 8 to clean or replace the electric heating element, which is more convenient for later maintenance. A first interface 10 is arranged on the top of the liquid storage tank 2, and the first interface 10 is provided with an extension section 46 extending to the lower part of the liquid storage tank 2; on the one hand, the disassembly and assembly operation of the first connecting pipe 7 can be made more convenient; on the other hand, it can ensure that the solvent enters the spray pipe 3 from the lower part of the liquid storage tank 2. The plug 11 is threadedly connected with the corresponding sub-tube 9. In addition, the spray pipe 3 of the above structure can be screwed and removed from the mixing tank 1 every time a section is drawn out; in this way, the external space requirement for disassembling the spray pipe 3 is lower, and it is more convenient for later cleaning and maintenance. In addition, a second interface with external threads is also provided on the top of the liquid storage tank 2 to communicate with the air supply network through the second connecting pipe, and the air supply network is connected to the outlet of the booster pump 4. A fourth valve is usually provided upstream of the second interface. The liquid delivery pipe 8 and the sub-tube 9 are both hard pipes. The liquid delivery pipe 8 is usually also equipped with a third valve.

[0030] Furthermore, it also includes: a first bracket 12; the first bracket 12 includes: a support leg, a support platform 13 located above the support leg, a vertical rod connecting the support leg and the support platform 13, and a pressing member 14 for pressing the liquid delivery pipe 8 against the support platform 13; one side of the pressing member 14 is hinged to the support platform 13, and the other side is detachably connected to the support platform 13 by bolts. It should be understood that the support leg can be fixed to the ground or the base by bolts to more stably support and limit the spray pipe 3. The vertical rod can be set as a hollow rod.

[0031] Furthermore, the liquid storage tank 2 is provided with a first hopper 15 at the feed inlet, and a filter screen is provided in the first hopper 15 .

[0032] Furthermore, the feeding device includes: a second bracket 16, a second hopper 17 installed on the second bracket 16, a guide pipe 18 installed at the bottom of the second hopper 17, and a vertical elevator 19 for conveying fertilizer particles to the second hopper 17; wherein the guide pipe 18 includes: a feeding section 20 extending in the up-down direction, a discharging section 21 extending obliquely downward from left to right, and an arc section connecting the bottom of the feeding section 20 and the top of the discharging section 21; the bottom of the discharging section 21 extends into the feeding port 36 of the mixing tank 1; the left side of the bottom of the second hopper 17 is provided with an arc-shaped first groove 22 extending along the bucket wall; the top of the feeding section 20 is provided with an annular ridge 23 surrounding the outer wall; the left part of the annular ridge 23 cooperates with the first groove 22, and is adapted to lock the annular ridge 23 in the first groove 22. The locking piece 24. It should be understood that the assembly of the guide tube 18 and the second hopper 17 can be completed by extending the bottom of the discharge section 21 into the feeding port 36 of the mixing tank 1, aligning the top of the feed section 20 with the bottom of the second hopper 17, inserting the left part of the annular ridge 23 into the first slot 22 at the bottom of the second hopper 17, and locking the locking member 24. The vertical elevator 19 feeds the fertilizer granules into the second hopper 17, and the fertilizer granules in the second hopper 17 fall into the mixing tank 1 along the guide tube 18; in this way, the feeding of the mixing tank 1 can be realized. After the current batch of fertilizer granules is completely fed into the mixing tank 1, the locking member 24 is loosened, and the guide tube 18 is removed, and the guide tube 18 can be removed from the feeding port 36 of the mixing tank 1. By adopting the above structure, the material guide pipe 18 can be set to be thicker to ensure the feeding efficiency and avoid blockage; at the same time, after the feeding is completed, the material guide pipe 18 can be easily and quickly removed to avoid hindering the staff from observing from the feeding port 36 of the mixing tank 1, and it is also convenient for the staff to enter and exit the mixing tank 1 from the feeding port 36 for cleaning and maintenance after shutdown. The bottom of the second hopper 17 is usually provided with a second valve.

[0033] Furthermore, an arc-shaped limiting edge 25 extending along the hopper wall is provided on the right side of the bottom of the second hopper 17; the locking piece 24 is provided with an arc-shaped second slot 26; the right part of the annular edge 23 and the limiting edge 25 cooperate with the second slot 26; the rear part of the locking piece 24 is hinged to the rear part of the second hopper 17, and the hinge axis is oriented up and down; the front part of the locking piece 24 is provided with a threaded hole passing through the front and back, and is adapted to a threaded positioning rod 27; a positioning hole 28 is provided on the front side of the bottom of the second hopper 17 to cooperate with the positioning rod 27 to position the locking piece 24. It should be understood that the top of the feed section 20 is aligned with the bottom of the second hopper 17, and the left part of the annular ridge 23 is inserted into the first slot 22 at the bottom of the second hopper 17; then the locking member 24 is rotated to the left, and the right part of the annular ridge 23 and the limiting ridge 25 are inserted into the second slot 26 of the locking member 24; finally, the knob positioning rod 27 is turned to insert the positioning rod 27 backward into the positioning hole 28 of the second hopper 17, so that the locking member 24 can lock the guide tube 18. At this time, the limiting ridge 25 supports the locking member 24, and the locking member 24 supports and limits the right part of the annular ridge 23. The front end of the positioning rod 27 is usually provided with a handle.

[0034] Furthermore, the mixing tank 1 lies horizontally on the base 29; the bottom of the mixing tank 1 is provided with a discharge port 30, and is adapted to a first valve; a hollow spiral blade 31 is provided inside the mixing tank 1, and is adapted to a motor 32 for driving the hollow spiral blade 31 to rotate; the hollow spiral blade 31 is provided with a plurality of flipping plates 33 along the extension direction; the width direction of the flipping plates 33 is parallel to the axial direction of the hollow spiral blade 31, so as to form an inner edge and an outer edge parallel to the axis of the hollow spiral blade 31; the length direction of the flipping plates 33 corresponds to the radial direction of the hollow spiral blade 31, so as to form a radial edge extending radially along the hollow spiral blade 31. It should be understood that by driving the hollow spiral blade 31 to rotate forward with the motor 32, the hollow spiral blade 31 can push the fertilizer particles in the mixing tank 1 from the feeding port 36 to the discharge port 30; at the same time, the flipping plates 33 will rotate synchronously with the hollow spiral blade 31, flipping the fertilizer particles located at the bottom layer from the front to the surface layer. By driving the hollow spiral blade 31 to reverse, the hollow spiral blade 31 can push the fertilizer particles in the mixing tank 1 from the discharge port 30 to the feeding port 36; at the same time, the turning plate 33 will rotate synchronously with the hollow spiral blade 31 to turn the fertilizer particles at the bottom layer from the back to the surface. In this way, the motor 32 drives the hollow spiral blade 31 to rotate forward and reverse alternately, so as to continuously stir and turn the fertilizer particles. The combined structure of the aforementioned hollow spiral blade 31 and the turning plate 33 is adopted; on the one hand, the fertilizer particles can be turned fully and efficiently; on the other hand, after the coating is completed, the fertilizer particles in the mixing tank 1 can be pushed to the discharge port 30 for discharge conveniently and quickly through the hollow spiral blade 31. In addition, a connecting portion 45 can be set along one of the radial edges of the turning plate 33; the connecting portion 45 can be attached to the side of the hollow spiral blade 31 and connected by bolts.

[0035] Further, the mixing tank 1 comprises: a cylindrical main body section 34, a feeding section 35 connected to the left end of the main body section 34; the mixing tank 1 sets the feeding port 36 at the left end of the feeding section 35, and sets the discharge port 30 at the right end of the bottom of the main body section 34; the diameter of the feeding section 35 gradually increases from left to right; the diameter of the right end of the feeding section 35 is smaller than the diameter of the main body section 34, and the left end of the main body section 34 is provided with an inner ring portion 37 extending along the inner circumferential wall to form a connection with the feeding section 35; the right end of the main body section 34 is open and adapted to the cover 38; the right end of the main body section 34 is provided with an outer ring portion 39 extending along the outer circumferential wall, and the outer ring portion 39 is detachably connected to the cover 38 by bolts. It should be understood that the hollow spiral blade 31 can be disassembled and assembled from the right end of the mixing tank 1.

[0036] Furthermore, the left end of the hollow spiral leaf 31 is provided with a first ring portion 40, which is rotatably connected to the inner ring portion 37 via a first slewing bearing 41; the right end of the hollow spiral leaf 31 is provided with a second ring portion 42, which is rotatably connected to the cover 38 via a second slewing bearing 43. It should be understood that the hollow spiral leaf 31 is relatively large, and the hollow spiral leaf 31 can be more stable by installing it with the above structure.

[0037] Furthermore, the second ring portion 42 is installed on the inner ring of the second slewing bearing 43; the inner ring of the second slewing bearing 43 is provided with internal teeth and is transmission-connected with the gear 44; the motor 32 drives the hollow spiral blade 31 to rotate by driving the gear 44 to rotate; the motor 32 is installed on the right side wall of the cover 38, and the cover 38 is provided with an axial hole through which the rotating shaft of the power supply motor 32 passes.

[0038] Although specific embodiments of the present invention are described above, those skilled in the art should understand that various changes or modifications may be made to these embodiments without departing from the principles and essence of the present invention, and these changes and modifications are all within the scope of protection of the present invention.

Claims

1. A slow-release fertilizer processing equipment, characterized in that: include: A mixing tank (1) for mixing fertilizer granules; and A feeding device for feeding fertilizer particles into the mixing tank (1); and A spray device for spraying a solvent into the mixing tank (1); in, The spray device comprises: a liquid storage tank (2), a spray pipe (3) connected to the bottom of the liquid storage tank (2), and a booster pump (4) connected to the top of the liquid storage tank (2); The top of the liquid storage tank (2) is provided with a feed port and is adapted to be equipped with a feed valve (5); The portion of the spray pipe (3) extending into the stirring tank (1) is equipped with a spray head (6); and an electric heating element is installed in the spray pipe (3).

2. The slow-release fertilizer processing equipment according to claim 1, characterized in that: The spray pipe (3) comprises: a first connecting pipe (7), a liquid delivery pipe (8), and a sub-pipe (9) which are connected in sequence; The top of the liquid storage tank (2) is provided with a first interface (10) for communicating with the first connecting pipe (7); the first interface (10) is provided with an extension section (46) extending to the lower part of the liquid storage tank (2); The sub-pipes (9) are located in the mixing tank (1) and are provided in plurality; each sub-pipe (9) is respectively provided with a nozzle (6); One end of the sub-tube (9) is provided with an internal thread, and the other end is provided with a matching external thread, and adjacent sub-tubes (9) form a threaded connection; The sub-tube (9) farthest from the liquid delivery tube (8) is provided with a plug (11) at one end away from the liquid delivery tube (8); The electric heating element is arranged at one end of the liquid delivery pipe (8) corresponding to the first connecting pipe (7).

3. The slow-release fertilizer processing equipment according to claim 2, characterized in that: Also included: a first bracket (12); The first bracket (12) comprises: a support foot, a support platform (13) located above the support foot, a vertical rod connecting the support foot and the support platform (13), and a pressing member (14) for pressing the liquid delivery pipe (8) onto the support platform (13); One side of the pressing piece (14) is hinged to the support platform (13), and the other side is detachably connected to the support platform (13) via bolts.

4. The slow-release fertilizer processing equipment according to any one of claims 1 to 3, characterized in that: The liquid storage tank (2) is provided with a first hopper (15) at the feed inlet, and a filter screen is provided in the first hopper (15).

5. The slow-release fertilizer processing equipment according to any one of claims 1 to 3, characterized in that: The feeding device comprises: a second bracket (16), a second hopper (17) mounted on the second bracket (16), a material guide pipe (18) mounted on the bottom of the second hopper (17), and a vertical elevator (19) for conveying fertilizer particles to the second hopper (17); in, The material guide pipe (18) comprises: a feeding section (20) extending in the up-down direction, a discharging section (21) extending obliquely downward from left to right, and an arc section connecting the bottom of the feeding section (20) and the top of the discharging section (21); The bottom of the discharge section (21) extends into the feeding port (36) of the stirring tank (1); The left side of the bottom of the second hopper (17) is provided with an arc-shaped first slot (22) extending along the hopper wall; the top of the feed section (20) is provided with an annular ridge (23) surrounding the outer wall; The left portion of the annular ridge (23) cooperates with the first clamping groove (22) and is adapted to fit a locking piece (24) that locks the annular ridge (23) in the first clamping groove (22).

6. The slow-release fertilizer processing equipment according to claim 5, characterized in that: The right side of the bottom of the second hopper (17) is provided with an arc-shaped limiting edge (25) extending along the hopper wall; The locking member (24) is provided with an arc-shaped second locking groove (26); The right portion of the annular edge (23) and the limiting edge (25) cooperate with the second clamping groove (26); The rear portion of the locking member (24) is hinged to the rear portion of the second hopper (17), and the hinge axis is oriented vertically; The front portion of the locking member (24) is provided with a threaded hole extending from front to back and adapted to fit a positioning rod (27) having a thread; A positioning hole (28) is provided on the front side of the bottom of the second hopper (17) to cooperate with the positioning rod (27) to position the locking member (24).

7. The slow-release fertilizer processing equipment according to claim 5, characterized in that: The mixing tank (1) lies horizontally on the base (29); The bottom of the stirring tank (1) is provided with a discharge port (30) and is adapted to be fitted with a first valve; The stirring tank (1) is provided with a hollow spiral blade (31) and is equipped with a motor (32) for driving the hollow spiral blade (31) to rotate; The hollow spiral blade (31) is provided with a plurality of turning plates (33) along the extension direction; The width direction of the turning plate (33) is parallel to the axial direction of the hollow spiral blade (31), so as to form an inner edge and an outer edge parallel to the axis of the hollow spiral blade (31); The length direction of the turning plate (33) corresponds to the radial direction of the hollow spiral blade (31), so as to form a radial edge extending in the radial direction of the hollow spiral blade (31).

8. The slow-release fertilizer processing equipment according to claim 7, characterized in that: The stirring tank (1) comprises: a cylindrical main body section (34), and a feeding section (35) connected to the left end of the main body section (34); The mixing tank (1) has a feeding port (36) disposed at the left end of the feeding section (35), and a discharging port (30) disposed at the right end of the bottom of the main section (34); The diameter of the feeding section (35) gradually increases from left to right; the diameter of the right end of the feeding section (35) is smaller than the diameter of the main body section (34); the left end of the main body section (34) is provided with an inner ring portion (37) extending along the inner peripheral wall to form a connection with the feeding section (35); The right end of the main body section (34) is open and adapted to fit a cover (38); The right end of the main body section (34) is provided with an outer ring portion (39) extending along the outer peripheral wall, and the outer ring portion (39) is detachably connected to the cover (38) via bolts.

9. The slow-release fertilizer processing equipment according to claim 8, characterized in that: A first ring portion (40) is provided at the left end of the hollow spiral blade (31), and the first ring portion (40) is rotatably connected to the inner ring portion (37) via a first slewing bearing (41); A second ring portion (42) is provided at the right end of the hollow spiral blade (31), and the second ring portion (42) is rotatably connected to the sealing cover (38) via a second slewing bearing (43).

10. The slow-release fertilizer processing equipment according to claim 9, characterized in that: The second ring portion (42) is mounted on the inner ring of the second slewing bearing (43); The inner ring of the second slewing bearing (43) is provided with internal teeth and is transmission-connected to the gear (44); The motor (32) drives the gear (44) to rotate, thereby driving the hollow spiral blade (31) to rotate; The motor (32) is mounted on the right side wall of the cover (38), and the cover (38) is provided with an axis hole through which the rotating shaft of the power supply motor (32) passes.

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