A high-efficiency raw material mixing equipment for the production of controlled-release blended fertilizers

Abstract

The invention discloses a raw material efficient mixing device for producing controlled-release blended fertilizers, comprising a mixing body, wherein a groove communicating with each other up and down is provided inside the mixing body; and a mixing structure, which is assembled inside the mixing body from top to bottom. The invention realizes preliminary bonding of raw materials into agglomerates by arranging the mixing body and the mixing structure, in a column-shaped to strip-shaped manner, in combination with a sprayed adhesive, and at the same time, can filter and collect un-bonded raw materials, utilize a push-down blade and an lift-up blade to realize raw material blocking and mixing, and utilize the gravity of the raw materials to perform secondary spraying of the adhesive on the surface of the collected raw materials, and finally, in the secondary exchange groove, the adhesive is mixed with the agglomerated fertilizer to realize uniform shaping of the fertilizer. Compared with the existing equipment, the invention not only performs simple blending of the fertilizer, but also shapes the state of the fertilizer after mixing, ensures that the outputted fertilizer maintains a uniform nutrient state, and is more conducive to subsequent nutritionally balanced granulation operations.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical production, and particularly to an efficient mixing device for raw materials used in the production of controlled-release blended fertilizers. Background Art

[0002] Controlled-release blended fertilizers are fertilizers that can control the nutrient release rate. The production mainly includes the following steps: First, raw material preparation is carried out. High-quality basic fertilizer raw materials such as urea and diammonium phosphate are selected, controlled-release materials are prepared, and medium and trace elements can also be added. Then, formula design is carried out. A reasonable formula is designed according to the nutrient requirements of crops, soil fertility, and fertilization goals, and the raw material dosage is determined. In the production process, the raw materials are first crushed, then mixed and stirred, and then granulated. For those that need coating, coating treatment is carried out. After that, drying, cooling, screening, and packaging are carried out. Finally, strict quality control is carried out to ensure that the quality of each link meets the standards. Sampling inspection is carried out on the raw materials and finished products, and a quality traceability system is established.

[0003] Among them, when mixing and stirring the raw materials of controlled-release blended fertilizers after crushing, generally, a simple stirring barrel or a horizontal mixer is used to perform this operation. However, these two mixing devices only achieve formal mixing. Although various raw materials can be initially mixed together at the moment of stirring, in the subsequent granulation process, the mixed state cannot be continuously guaranteed. Due to this instability, it is very likely that the homogenization effect of the fertilizer nutrients cannot be guaranteed after granulation, which will in turn have an adverse impact on the actual use quality of the fertilizer. For example, it may cause uneven nutrient absorption by crops in different regions after fertilization, affecting the growth, development, yield, and quality of crops.

[0004] Therefore, an efficient mixing device for raw materials used in the production of controlled-release blended fertilizers is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide an efficient mixing device for raw materials used in the production of controlled-release blended fertilizers, so as to solve the problem that the mixing and homogenization effect of the efficient mixing device for raw materials used in the production of controlled-release blended fertilizers cannot be guaranteed as mentioned in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An efficient mixing device for raw materials used in the production of controlled-release blended fertilizers, comprising:

[0007] A mixing body, internally provided with a channel communicating up and down, for providing a mixing space for the input raw materials;

[0008] A mixing structure, assembled inside the mixing body from top to bottom, for cooperating with the mixing body to perform efficient mixing of fertilizers;

[0009] The mixing machine body comprises a mixing box, three material guide channels are provided inside the mixing box, a spraying notch is provided on the inner wall of one of the material guide channels, an exchange channel is provided inside the mixing box at the lower end of the material guide channel, mixing barrels are fixedly arranged at intervals just below the exchange channel inside the mixing box, and a filter rack is fixedly arranged at the upper end of the mixing barrel, a diversion channel is provided inside the mixing box on both sides of the mixing barrel, a secondary exchange channel is provided inside the mixing box at the lower end of the diversion channel and the lower end of the mixing barrel, and a discharge channel with an open end is provided inside the mixing box below the secondary exchange channel;

[0010] The mixing structure includes a discharging screw, which is rotatably arranged inside the discharging chute, and a bevel gear box is arranged for transmission between the discharging screws. A two-way distributing screw is rotatably arranged at the lower port of the mixing barrel just above the discharging screw, and a bevel gear box is also transmission-connected between the discharging screws. Both ends of the two-way distributing screw extend through the mixing box and are transmission-connected to a plurality of air-drying fans through two sets of toothed belt pulleys respectively. The air-drying fans are installed and fixed in assembly channels opened in the corresponding diverter channels on the front and rear sides of the mixing box. The rotating shaft of one of the bevel gears of the bevel gear box connected to the two-way distributing screw extends upward into the mixing barrel, and is transmission-connected to a stirring rod rotatably arranged inside the mixing barrel through a coupling. A plurality of push-down blades are fixed on the upper half of the side surface of the stirring rod, and a plurality of lifting blades are arranged on the lower half of the stirring rod. The push-down blades are fixed to a sleeve slidingly sleeved on the surface of the stirring rod, and the lower annular surface of the sleeve A first return spring is slidably sleeved in a preset slide groove on the surface of the stirring rod, a sealing colloid is integrally arranged above the inner wall of the sleeve, and a glue spray nozzle connected to the internal connecting liquid hole of the stirring rod is installed at the same position of the sealing colloid inside the stirring rod tube shell, the sleeve and the spring pull rod are fixed by a connecting rod, the upper end of the spring pull rod is slidably inserted in the upper spring pull rod or the limited plug hole opened in the stirring rod, and the sliding limit of the upper end of the spring pull rod is performed by the second return spring, the interior of the spring pull rod located at the top is provided with a glue supply tube connected to the connecting liquid hole, and a glue supply valve is arranged at the upper end of the glue supply tube, the upper end of the stirring rod cooperates with a bevel gear box and two sets of toothed belt pulleys to be fixed to a cam rotatably arranged inside the mixer box, the wheel side of the cam is always in active contact with one end of the spring piston rod, and the spring end of the spring piston rod is slidingly limited and arranged inside the glue spray tube, and the glue spray tube is fixedly arranged at the center position of the spraying notch inside the mixer box.

[0011] ​​Preferably, a feeding end cover is mounted on the upper end of the mixing machine case by bolts. The upper surface of the feeding end cover is integrally provided with several interfaces for feeding materials into the mixing machine case from the center to the periphery. The interfaces on both sides of the central interface are converged and connected, and after connection, the interfaces form three independent conveying pipelines. The lower ports of the guiding chute channels on both sides are inclined towards the middle guiding chute channel.

[0012] Preferably, the discharging screw is rotatably arranged inside the discharging chute channel, and a part of the rod body is intercepted from the central position and broken into two parts. One end of the broken rod body penetrates out of the mixing machine case and is fixed to the toothed belt pulley driven by the driving motor. The bevel gear box is composed of a bearing box body and at least two bevel gears, and the bevel gears are meshed with each other for transmission. The two-way feeding screw is also broken into two parts of the rod body from the middle position, and the spiral directions of the two parts of the rod body are opposite.

[0013] Preferably, each set of toothed belt pulleys is composed of two toothed belt pulleys and a toothed belt for drivingly connecting the toothed belt pulleys. The wheel shafts of one of the toothed belt pulleys in the two sets of toothed belt pulleys are fixed to the impeller shafts of a drying fan, and the drying fan is also drivingly connected to other drying fans through a set of toothed belt pulleys.

[0014] Preferably, the spiral direction of the upward lifting blades is opposite to that of the downward pushing blades.

[0015] Preferably, a designated sliding chute is opened inside the pipe shell of the stirring rod directly below the glue spraying nozzle, and a connecting rod is slidably arranged inside the chute. The lower end of the spring pull rod at the bottom is provided with a piston structure, and there is sufficient sliding distance between the lower end of the piston and the pipe end of the stirring rod.

[0016] Preferably, the upper end of the stirring rod is fixed to the wheel shaft of one of the bevel gears inside the bevel gear box. A through hole communicating with the communicating liquid hole is opened inside the bevel gear, and the inside of the bevel gear box continues to extend upward through the through hole. The bevel gear box is provided with an adhesive communicating interface for three-way connection at the upper port of the extended through hole. Among them, the middle interface is communicated with an external adhesive supply device.

[0017] Preferably, an interface and a pressure spray head are respectively fixed on the side surface and inside of the glue spraying pipe at the opposite ends of the spring piston rod, and the spraying notch has sufficient space for spraying glue into the guiding chute channel.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] Through the settings of the feeding end cover, discharging screw, guiding channel, cam, spring piston rod, glue spraying pipe, spraying notch, and alternating channel, the present invention can integrate and communicate the input raw materials, enabling them to be preliminarily mixed. After the confluence, the materials are conveyed through three main paths and transformed from a columnar shape to a strip shape during the conveying process, so as to facilitate full and large-area confluence and fitting. Meanwhile, driven by the driving motor, the cam continuously and intermittently pushes the spring piston rod, thereby realizing the continuous spraying of the adhesive through the glue spraying pipe onto the surface of the raw materials, achieving the preliminary bonding of the raw materials into a mass after confluence, and providing a basic condition for a nutritionally balanced controlled-release blended fertilizer.

[0020] Through the settings of the mixing machine box, shunt channel, filter screen frame, mixing barrel, secondary alternating channel, discharging channel, discharging screw, bevel gear box, bidirectional feeding screw, toothed belt pulley group, air drying fan, stirring rod, downward pushing blade, connecting liquid hole, glue spraying nozzle, upward lifting blade, sleeve, first return spring, sealing colloid, connecting rod, spring pull rod, second return spring, glue replenishing pipe, and glue replenishing valve, the present invention can filter and collect the unmixed raw materials, and use the methods of receiving rotation and downward transmission and receiving rotation and upward transmission to block and mix the downward conveyance of the raw materials. At the same time, the upward lifting blade utilizes the gravity of the falling raw materials to move downward, temporarily opening the glue spraying nozzle and dragging the spring pull rod downward, and then compressing the adhesive inside the connecting liquid hole by the downward moving spring pull rod, enabling the adhesive to be sprayed through the glue spraying nozzle onto the surface of the raw materials stored on the upward lifting blade, realizing the glue spraying treatment of the raw materials. Then, the raw materials are scattered again into a strip shape by the bidirectional feeding screw and are mixed with the stable agglomerated fertilizer inside the secondary alternating channel. Finally, they are output under the action of the discharging screw, thereby realizing the efficient mixing of the raw materials of the controlled-release blended fertilizer. Compared with the current fertilizer mixing equipment, it not only simply blends the fertilizers, but also shapes the state of the fertilizers after mixing, ensuring that the output fertilizers maintain a uniform nutrient state, which is more conducive to subsequent granulation operations with a balanced nutrition, guaranteeing the high-quality production of the controlled-release blended fertilizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the overall structural view of the present invention;

[0022] Figure 2 is the overall section of the present invention Figure 1 ;

[0023] Figure 3 is the overall section of the present invention Figure 2 ;

[0024] Figure 4 is the schematic diagram of the mixing structure of the present invention;

[0025] Figure 5Schematic diagram of the stirring rod of the present invention;

[0026] Figure 6 Cross-sectional view of the stirring rod of the present invention;

[0027] Figure 7 Schematic diagram of the cam and its connection structure of the present invention.

[0028] In the figure:

[0029] 1. Mixing body; 11. Mixing material box; 111. Feeding channel; 1111. Spraying notch; 112. AC channel; 113. Shunt channel; 114. Filter screen frame; 115. Mixing barrel; 116. Secondary AC channel; 117. Discharge channel; 12. Feeding end cover;

[0030] 2. Mixing structure; 21. Discharge screw; 22. Bevel gear box; 221. Adhesive connection interface; 23. Bidirectional feeding screw; 24. Toothed belt pulley set; 25. Air drying fan; 26. Stirring rod; 261. Lower pushing blade; 2611. Connecting liquid hole; 2612. Glue spraying nozzle; 262. Upper lifting blade; 2621. Sleeve; 2622. First return spring; 2623. Sealing colloid; 2624. Connecting rod; 2625. Spring pull rod; 2627. Second return spring; 2628. Glue replenishing pipe; 2629. Glue replenishing valve; 27. Cam; 271. Spring piston rod; 272. Glue spraying pipe. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figures 1 to 7 , the present invention provides a technical solution for an efficient mixing device for raw materials used in the production of controlled-release blended fertilizers:

[0033] An efficient mixing device for raw materials used in the production of controlled-release blended fertilizers, comprising:

[0034] A mixing body 1, internally provided with a vertically communicating channel for providing a mixing space for the input raw materials;

[0035] A mixing structure 2, assembled inside the mixing body 1 from top to bottom, for cooperating with the mixing body 1 to perform efficient mixing of fertilizers.

[0036] The mixer body 1 includes a mixer box 11, and a feed end cover 12 is installed on the upper end of the mixer box 11 by bolts. The upper surface of the feed end cover 12 is integrally provided with several interfaces for feeding materials into the mixer box 11 from the center to the periphery, and the interfaces on both sides of the central interface are merged and connected, and the interfaces form three independent conveying pipelines after being connected. The inside of the mixer box 11 corresponds to the three independent conveying pipelines and is provided with three scraper-shaped material guide channels 111 from top to bottom, wherein the two long inner walls of the material guide channel 111 located in the middle are symmetrically provided with spraying slots 1111 connected with the inside of the material guide channel 111, and the lower ports of the material guide channels 111 located on both sides are inclined toward the middle material guide channel 111, and the inside of the mixer box 11 is provided with an exchange channel 112 at the lower port of the material guide channel 111.

[0037] Both ends of the bidirectional material distribution screw 23 extend out of the mixer box 11 and are connected to the two coaxial toothed belt pulley groups 24. The toothed belt pulley groups 24 are composed of two toothed belt pulleys and toothed belts for connecting the toothed belt pulleys. The axle of one of the toothed belt pulleys of the two toothed belt pulley groups 24 is fixed to the impeller shaft of an air-drying fan 25. The air-drying fan 25 is also connected to the other air-drying fans 25 in conjunction with a set of toothed belt pulley groups 24. The air-drying fan 25 is installed and fixed in the assembly channel corresponding to the diverter channel 113 on the front and rear sides of the mixer box 11. The inner wall of the diverter channel 113 is provided with an exhaust through slot to the outside of the mixer box 11, which is used to air dry the adhered fertilizer flowing inside the diverter channel 113.

[0038] The wheel axles of the bevel gears on both sides of the bevel gear box 22 extend out of the mixer box 11, and are fixed with the toothed belt pulley set 24 and the cam 27 rotatably set inside the mixer box 11. The wheel side of the cam 27 is always in active contact with one end of the spring piston rod 271, and the spring end of the spring piston rod 271 is slidingly limited and set inside the glue spraying tube 272. The side of the glue spraying tube 272 and the opposite end of the spring piston rod 271 inside the glue spraying tube 272 are respectively fixed with interfaces and pressure spray heads, and the glue spraying tube 272 is fixedly set at the center of the spraying slot 1111 inside the mixer box 11, and the spraying slot 1111 has sufficient space for spraying glue inside the material guide channel 111, and the interface on the side of the glue spraying tube 272 is connected with the adhesive communication interface 221 through a pipeline.

[0039] During operation, first connect the conveying mechanism of the raw material storage bin to the interface on the upper surface of the feeding end cover 12, and then connect the end tooth pulley of the discharging screw 21 to the driving motor through a toothed belt, and then the production and mixing of fertilizer raw materials can be carried out. When performing the mixing, input the raw materials into the feeding end cover 12, and through cross-mixing and conveying, they enter the guide chute 111. The raw materials are transformed from columnar conveying to belt-shaped. At this time, the cams 27 on both sides of the middle guide chute 111 rotate under the drive of the driving motor in cooperation with the discharging screw 21, bevel gear box 22, bidirectional feeding screw 23, toothed pulley group 24 and stirring rod 26, intermittently pushing the spring piston rod 271 to move along the glue spraying pipe 272, compressing the adhesive in the glue spraying pipe 272 to be sprayed through the nozzle onto the spraying slot 1111 and spread to the inside of the guide chute 111, spraying the conveyed raw materials. The fertilizer raw materials sprayed with the adhesive are input into the alternating channel 112, where they meet with other fertilizer raw materials and additives. After meeting, they stick together in irregular small lumps. Then the lumpy fertilizer will be filtered and diverted to the diversion chute 113. Then the rotating bidirectional feeding screw 23 will drive the air-drying fan 25 to blow air on the lumpy fertilizer for air-drying.

[0040] In summary, through the settings of the feeding end cover 12, discharging screw 21, guide chute 111, cam 27, spring piston rod 271, glue spraying pipe 272, spraying slot 1111 and alternating channel 112, the integration and communication of the input raw materials can be carried out, enabling them to be preliminarily mixed, and after meeting, enabling them to be conveyed through three main paths, and being transformed from columnar to belt-shaped during the conveying process, so as to facilitate full and large-area meeting and fitting. At the same time, under the drive of the driving motor, the cam 27 continuously and intermittently pushes the spring piston rod 271, thereby realizing the continuous spraying of the adhesive through the glue spraying pipe 272 onto the surface of the raw materials, achieving the preliminary bonding of the raw materials into lumps after meeting, and providing a basic condition for the nutrient balance of the controlled-release blended fertilizer.

[0041] As an embodiment of the present invention, as Figures 1 to 7 shown, inside the mixing machine case 11, mixing barrels 115 are fixedly arranged at intervals directly below the alternating channel 112, and the upper ports of the mixing barrels 115 are open, and a convex filter screen frame 114 is fixedly arranged at the open ports. On both sides of the mixing barrels 115 inside the mixing machine case 11, diversion chutes 113 communicating with the alternating channel 112 are opened. Inside the mixing machine case 11, a secondary alternating channel 116 is obliquely intersected and opened from the lower port of the diversion chute 113 to the lower port of the mixing barrel 115. Inside the mixing machine case 11, a discharging chute 117 with one end open is opened below the secondary alternating channel 116.

[0042] The hybrid structure 2 includes a discharge screw 21 which is rotatably arranged inside the discharge channel 117 and has a part of its rod body intercepted from the central position and broken into two parts. One end of the broken rod body penetrates through the mixing material box 11 and is fixed to a belt pulley driven by a driving motor. A bevel gear box 22 is arranged at the transmission position of the broken part of the discharge screw 21 to maintain the coaxial rotation ability of the discharge screw 21 after being broken. The bevel gear box 22 consists of a bearing housing and at least two bevel gears, and the bevel gears are meshed with each other for transmission. A two-way material distribution screw 23 is rotatably arranged at the lower port of the mixing barrel 115 directly above the discharge screw 21. The two-way material distribution screw 23 is also broken into two parts of the rod body from the middle position, and the spiral directions of the two parts of the rod body are arranged in opposite directions. And at the broken position, it is also connected coaxially through the bevel gear box 22. The rotating shaft of one of the bevel gears of the bevel gear box 22 connecting the two-way material distribution screw 23 extends upward into the mixing barrel 115 and is in transmission connection with a stirring rod 26 rotatably arranged inside the mixing barrel 115 through a coupling. Several downward pushing blades 261 are fixedly arranged around the upper half of the side of the stirring rod 26 along a spiral path. And several upward lifting blades 262 are arranged below the downward pushing blades 261 according to the arrangement mode of the downward pushing blades 261 on the lower half of the stirring rod 26. And the spiral direction of the upward lifting blades 262 is opposite to that of the downward pushing blades 261. The downward pushing blades 261 are fixed to a sleeve 2621 which is slidably sleeved on a preset chute on the surface of the stirring rod 26 through a connecting rod. And a first return spring 2622 is slidably sleeved on the lower annular surface of the sleeve 2621 in the preset chute on the surface of the stirring rod 26 for performing sliding limitation on the sleeve 2621. A sealing colloid 2623 is integrally arranged at the upper part of the inner wall of the sleeve 2621 corresponding to the central position of the upward lifting blade 262. And an installation hole inclined to the upward lifting blade 262 is opened at the same position of the pipe shell of the stirring rod 26 inside the sealing colloid 2623. And a glue spraying nozzle 2612 communicated with a communicating liquid hole 2611 is arranged inside the installation hole. The communicating liquid hole 2611 is opened along the pipe diameter inside the stirring rod 26. The sealing colloid 2623 can perform sliding opening and closing on the open end of the glue spraying nozzle 2612. A designated sliding chute is opened directly below the glue spraying nozzle 2612 inside the pipe shell of the stirring rod 26. And a connecting rod 2624 is slidably arranged inside the chute. And the connecting rod 2624 is fixedly connected between the sleeve 2621 and a spring pull rod 2625. The spring pull rod 2625 is in the shape of a weight, and the upper end is slidably inserted into a limiting jack opened inside the upper spring pull rod 2625 or the stirring rod 26 and is slidably limited at the upper end of the spring pull rod 2625 through a second return spring 2627. A glue supplement pipe 2628 communicated with the communicating liquid hole 2611 is opened inside the topmost spring pull rod 2625. And a glue supplement valve 2629 which opens downward for glue supplement is arranged at the upper port of the glue supplement pipe 2628. A piston structure is arranged at the lower end of the lowermost spring pull rod 2625.Moreover, there is sufficient sliding distance between the lower end of the piston and the pipe end of the stirring rod 26. The upper end of the stirring rod 26 is fixed to the axle of one of the bevel gears inside the bevel gear box 22. A through hole communicating with the connecting liquid hole 2611 is provided inside the bevel gear, and the inside of the bevel gear box 22 continues to extend upward and penetrate correspondingly. At the upper port of the extended through hole of the bevel gear box 22, an adhesive connecting interface 221 for three-way connection is provided. Among them, the middle interface is communicated with an external adhesive supply device.,

[0043] During operation, the agglomerated fertilizer falls on the surface of the filter screen frame 114, and is filtered and diverted to the two-side diversion channels 113. The unbonded or fallen raw materials enter the mixing barrel 115 and fall on the surface of the rotating downward pushing blade 261. The downward pushing blade 261 intercepts and conveys the raw materials downward. The raw materials fall on the surface of the upward lifting blade 262, impact and press downward to make it move downward along the pipe wall of the stirring rod 26 through the sleeve 2621, compress the first return spring 2622, drive the sealing colloid 2623 and the connecting rod 2624 to move, release the blockage of the glue spraying nozzle 2612, and the spring pull rod 2625 squeezes the adhesive in the connecting liquid hole 2611 to spray it outward on the surface of the raw materials. The rotating upward lifting blade 262 rotates and uploads the raw materials, slows down the falling speed and promotes mixing. After the raw materials fall between the two-way dividing screws 23, the structures such as the upward lifting blade 262 reset, generating negative pressure to open the glue replenishing valve 2629 to replenish the adhesive in the connecting liquid hole 2611. The rotating two-way dividing screws 23 disperse the raw materials and enter the secondary exchange channel 116 again. The agglomerated fertilizer intersects with the raw materials output from the mixing barrel 115 and is adhesively mixed again, falls into the discharge channel 117, and is output under the action of the discharge screw 21.

[0044] In summary, through the settings of the mixing machine case 11, the diversion channel 113, the filter screen frame 114, the mixing barrel 115, the secondary alternating channel 116, the discharge channel 117, the discharge screw 21, the bevel gear box 22, the bidirectional material distribution screw 23, the toothed belt wheel set 24, the air-drying fan 25, the stirring rod 26, the downward pushing blade 261, the connecting liquid hole 2611, the glue spraying nozzle 2612, the upward lifting blade 262, the sleeve 2621, the first return spring 2622, the sealing colloid 2623, the connecting rod 2624, the spring pull rod 2625, the second return spring 2627, the glue replenishing pipe 2628 and the glue replenishing valve 2629, the unadhered and mixed raw materials can be filtered and collected, and by means of the downward and upward rotation of the receiving, the blocking and mixing of the downward transportation of the raw materials are carried out. At the same time, the upward lifting blade 262 will utilize the gravity of the falling raw materials to temporarily open the glue spraying nozzle 2612 and drag the spring pull rod 2625 downward in a downward movement manner. Then, the downward moving spring pull rod 2625 compresses the adhesive inside the connecting liquid hole 2611, so that the adhesive is sprayed through the glue spraying nozzle 2612 onto the surface of the raw materials carried by the upward lifting blade 262, realizing the glue spraying treatment of the raw materials. Then, the raw materials will be scattered again in a strip shape by the bidirectional material distribution screw 23 and adhered and mixed with the stable agglomerated fertilizer inside the secondary alternating channel 116. Finally, it is output under the action of the discharge screw 21. In this way, the efficient mixing of the raw materials of the controlled-release and blended fertilizer can be realized. Compared with the current fertilizer mixing equipment, it not only simply blends the fertilizer, but also shapes the state of the fertilizer after mixing, ensuring that the output fertilizer maintains a uniform nutrient state, which is more conducive to the subsequent granulation operation with balanced nutrition and guarantees the high-quality production of the controlled-release and blended fertilizer.

[0045] Working principle: When working, first connect the conveying mechanism of the raw material storage bin with the interface on the upper surface of the feed end cover 12, and then connect the toothed belt wheel at the end of the discharge screw 21 with the drive motor through the toothed belt, and then the production and mixing of the fertilizer raw materials can be carried out; when performing the mixing of the fertilizer raw materials, first input the required raw materials into the feed end cover 12, and enter the interior of the guide channel 111 under the mixed conveying of the feed end cover 12, and then the raw materials entering the guide channel 111 will be transformed from columnar conveying to diffused belt-shaped, at this time, the cams 27 on both sides of the middle guide channel 111 will rotate under the drive of the drive motor in conjunction with the discharge screw 21, the bevel gear box 22, the bidirectional material distribution screw 23, the toothed belt wheel group 24 and the stirring rod 26, and then the cams 27 will be intermittent. The spring piston rod 271 is pushed to move back and forth along the glue spraying tube 272. The reciprocating spring piston rod 271 not only compresses the adhesive inside the glue spraying tube 272 and sprays it to the inside of the spraying slot 1111 through the nozzle, and diffuses it from the spraying slot 1111 to the inside of the material guide channel 111, spraying the adhesive on the raw materials transported inside the material guide channel 111, but also creates a negative pressure environment inside the glue spraying tube 272 to suck and supplement the adhesive inside the communicating liquid hole 2611, and then the fertilizer raw material sprayed with the adhesive is input into the inside of the exchange channel 112, and intersects with other fertilizer raw materials and additives inside the exchange channel 112, and then the fertilizer raw materials and additives are bonded together after the intersection, and the bonding presents an irregular shape. The fertilizer in small clumps will then fall on the surface of the filter rack 114, and then be filtered by the filter rack 114 and be diverted to the inside of the diversion channels 113 on both sides. The raw materials that are not bonded or detached will enter the mixing barrel 115 and fall on the surface of the rotating push-down blade 261. The push-down blade 261 will then intercept and receive the raw materials and transport and conduct them downward. The fallen raw materials will fall on the surface of the lifting blade 262 and impact and press the lifting blade 262 downward according to gravity. Then, the lifting blade 262 will move downward along the tube wall of the stirring rod 26 through the sleeve 2621 under the action of the gravity of the raw materials. The downwardly moving sleeve 2621 will compress the first return spring 2622 and drive the sealing colloid 2623 and the connecting rod 2624 along the mixing barrel 115. The glue spray nozzle 2612 is opened and the connecting rod 2624 is connected to the upper lifting blade 262 to transfer the raw material to the upper lifting blade 262.Thereby, the falling speed of the raw materials is slowed down, and the mixing of the raw materials is promoted, ensuring that the raw materials are sprayed and covered with the adhesive and are fully mixed. Then, the raw materials will be separated from the support of the lifting blade 262 under the rotation and transmission action of the single-piece lifting blade 262, and fall between the two-way material distribution screws 23. At this time, the lifting blade 262 and the sleeve 2621 will be reset under the action of the first reset spring 2622, and then the structure connected to the sleeve 2621 will be reset. When the top spring pull rod 2625 is reset, this action will directly cause the space volume of the liquid hole 2611 below it to change, which is specifically manifested as an increase in the space volume. This means that if the volume in a closed system increases without new gas or liquid being replenished, the air pressure in the system will drop, thereby forming a negative pressure environment below atmospheric pressure. The generation of negative pressure environment will further trigger the opening mechanism of the glue filling valve 2629 to open downward, and then the adhesive will enter the connecting liquid hole 2611 below the spring pull rod 2625, so as to replenish the adhesive inside the connecting liquid hole 2611 below, and then the rotating two-way material distribution screw 23 will disperse the raw materials to both ends, so that it will be transported into the secondary exchange channel 116 in a belt shape again. At the same time, the rotating two-way material distribution screw 23 will pass through the toothed belt pulley group 24 to the wind The drying fan 25 is driven to rotate, so that the drying fan 25 blows air to the surface of the fertilizer agglomerates diverted in the diverting channel 113 to dry the fertilizer agglomerates, so that the fertilizer agglomerates reach a stable bonding state, and then the fertilizer agglomerates will enter the secondary exchange channel 116 along the diverting channel 113, and intersect with the raw materials output from the mixing barrel 115, and perform sticking and mixing again. The mixed raw materials will fall into the discharge channel 117 and be discharged outward through the output port under the action of the rotating discharge screw 21. ,

[0046] It should be noted that all the positions and structures of the device that come into contact with the raw materials are sprayed with anti-sticking and anti-corrosion coatings; the upper side of the rubber filling pipe 2628 is isolated and sealed by a sealing gasket; the raw material intersection pipeline of the feed end cover 12 is set as a twisted spiral connecting channel according to the needs, so as to facilitate the initial full mixing of the raw materials; the interface in the middle of the feed end cover 12 is connected to the main fertilizer raw material bin, and the interfaces on both sides are connected to the secondary fertilizer raw material bin and the additive bin.

[0047] While 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 high-efficiency raw material mixing equipment for the production of controlled-release blended fertilizers, characterized in that: include: A mixing body (1) is provided with a groove communicating with each other from top to bottom, so as to provide a mixing space for the input raw materials; The mixing structure (2) is assembled inside the mixing body (1) from top to bottom, and is used to cooperate with the mixing body (1) to perform efficient mixing of fertilizers; The mixing machine body (1) comprises a mixing box (11), wherein three material guide channels (111) are provided inside the mixing box (11), wherein a spraying notch (1111) is provided on the inner wall of one of the material guide channels (111), wherein an exchange channel (112) is provided inside the mixing box (11) at the lower end of the material guide channel (111), and mixing barrels (115) are fixedly arranged at intervals directly below the exchange channel (112) inside the mixing box (11), and wherein the mixing barrels (115) are provided at the lower end of the exchange channel (112). A filter rack (114) is fixedly provided at the upper end of the material barrel (115); a diversion channel (113) is provided inside the mixing box (11) on both sides of the mixing barrel (115); a secondary exchange channel (116) is provided inside the mixing box (11) at the lower end of the diversion channel (113) and the lower end of the mixing barrel (115); and a discharge channel (117) with an open end is provided inside the mixing box (11) below the secondary exchange channel (116); The mixing structure (2) comprises a discharge screw (21), the discharge screw (21) being rotatably arranged inside a discharge channel (117), a bevel gear box (22) being arranged between the discharge screws (21) for transmission, a bidirectional material distribution screw (23) being rotatably arranged at a lower port of a mixing barrel (115) directly above the discharge screw (21), and a bevel gear box (22) being similarly connected to the discharge screws (21), both ends of the bidirectional material distribution screw (23) extending out of the mixing box (11) and being connected to a plurality of air drying fans (25) through two sets of toothed belt pulleys (24), the air drying fans (25) being mounted and fixed on the front and rear sides of the mixing box (11) corresponding to the flow divider. The rotating shaft of one of the bevel gears of the bevel gear box (22) connected to the bidirectional material distribution screw (23) extends upward into the mixing barrel (115) and is connected to a stirring rod (26) rotatably arranged in the mixing barrel (115) through a coupling. A plurality of push-down blades (261) are fixed to the upper half of the side of the stirring rod (26), and a plurality of lifting blades (262) are arranged on the lower half of the stirring rod (26). The push-down blades (261) are fixed to a sleeve (2621) slidably sleeved on the surface of the stirring rod (26), and the lower annular surface of the sleeve (2621) is slidably sleeved in a preset slide groove on the surface of the stirring rod (26). The sleeve (2621) is provided with a sealing colloid (2623) above the inner wall of the sleeve (2621), and a glue spray nozzle (2612) connected to the internal communication liquid hole (2611) of the stirring rod (26) is installed at the same position of the sealing colloid (2623) inside the tube shell of the stirring rod (26). The sleeve (2621) and the spring pull rod (2625) are fixed by a connecting rod (2624). The upper end of the spring pull rod (2625) is slidably inserted into a limited insertion hole provided inside the upper spring pull rod (2625) or the stirring rod (26), and the sliding limit of the upper end of the spring pull rod (2625) is performed by a second return spring (2627). The spring pull rod (2625) is provided with a glue supply pipe (2628) in communication with the connecting liquid hole (2611), and a glue supply valve (2629) is arranged at the upper end of the glue supply pipe (2628). The upper end of the stirring rod (26) cooperates with the bevel gear box (22) and the two sets of toothed belt pulleys (24) to be fixed to the cam (27) rotatably arranged inside the mixer box (11). The wheel side surface of the cam (27) is always in active contact with one end of the spring piston rod (271), and the spring end of the spring piston rod (271) is slidably limited and arranged inside the glue spray pipe (272), and the glue spray pipe (272) is fixedly arranged at the center position of the spraying slot (1111) inside the mixer box (11).

2. The high-efficiency raw material mixing equipment for producing controlled-release blended fertilizers according to claim 1, characterized in that: The upper end of the mixer box (11) is mounted with a feed end cover (12) by means of bolts. The upper surface of the feed end cover (12) is integrally provided with a plurality of interfaces for feeding materials into the mixer box (11) from the center to the periphery, and interfaces on both sides of the central interface are connected and arranged to converge, and after being connected, the interfaces form three independent conveying pipelines, and the lower ends of the material guide channels (111) on both sides are arranged to be inclined toward the central material guide channel (111).

3. The high-efficiency raw material mixing equipment for producing controlled-release blended fertilizers according to claim 1, characterized in that: The discharge screw (21) is rotatably arranged inside the discharge channel (117), and a portion of the rod body is cut off from the center position and is broken into two parts, and one end of the broken rod body passes through the mixer box (11) and is fixed to a toothed belt wheel driven by a driving motor. The bevel gear box (22) is composed of a bearing box body and at least two bevel gears, and the bevel gears are mutually driven and meshed. The bidirectional material distribution screw (23) is also broken into two rod body parts from the middle position, and the spiral directions of the two rod body parts are arranged in opposite directions.

4. The high-efficiency raw material mixing equipment for producing controlled-release blended fertilizers according to claim 1, characterized in that: The toothed belt wheel groups (24) each consist of two toothed belt wheels and a toothed belt for transmission connection with the toothed belt wheels, and the wheel axle of one of the toothed belt wheels of the two toothed belt wheel groups (24) is fixed to the impeller shaft of an air-drying fan (25), and the air-drying fan (25) is also connected to the other air-drying fan (25) by a toothed belt wheel group (24).

5. The high-efficiency raw material mixing equipment for producing controlled-release blended fertilizers according to claim 1, characterized in that: The spiral direction of the upward-lifting blade (262) is arranged opposite to that of the downward-pushing blade (261).

6. The high-efficiency raw material mixing equipment for producing controlled-release blended fertilizers according to claim 1, characterized in that: A designated sliding slideway is provided inside the tube shell of the stirring rod (26) directly below the glue spray nozzle (2612), and a connecting rod (2624) is slidably provided inside the slideway. A piston structure is provided at the lower end of the spring pull rod (2625) located at the bottom, and a sufficient sliding distance exists between the lower end of the piston and the tube end of the stirring rod (26).

7. The high-efficiency raw material mixing equipment for producing controlled-release blended fertilizers according to claim 1, characterized in that: The upper end of the stirring rod (26) is fixed to the axle of one of the bevel gears inside the bevel gear box (22), and a through hole is provided inside the bevel gear that is connected to the communication fluid hole (2611), and the corresponding through hole inside the bevel gear box (22) continues to extend upwards and is connected, and the bevel gear box (22) is provided with a three-way adhesive communication interface (221) at the upper end of the extended through hole, wherein the middle interface is connected to an external adhesive supply device.

8. The high-efficiency raw material mixing equipment for producing controlled-release blended fertilizers according to claim 1, characterized in that: The glue spraying tube (272) is fixedly provided with an interface and a pressure spray head on the tube side and inside at the opposite end of the spring piston rod (271), and the spraying notch (1111) has sufficient space for spraying glue inside the material guide channel (111).

Images