A mixing machine for bio-fertilizer production

Abstract

This utility model relates to a mixer for bio-fertilizer production. It includes a frame, on which a mixing tank structure is mounted. A discharge chute and discharge valve structure are provided at the discharge port of the mixing tank structure. A tank cover and a cover drive are pivotally connected to the top of the mixing tank structure. A liquid spraying structure is installed on the tank cover, and a feeding device and a weighing sensor are also provided on the tank cover. The feeding device includes a feeding cylinder, and a feeding valve assembly is provided at the lower discharge port of the feeding cylinder. A second stirring device and a first stirring device are arranged vertically within the mixing tank structure. It also includes a crushing device located at the top of the mixing tank structure. The crushing device includes a feeding crushing box structure, within which a roller crushing assembly is installed, and the roller crushing assembly is drive-connected to the second stirring device. This utility model can pre-disperse the input bio-fertilizer raw materials and can quantitatively weigh and add various additives, resulting in good mixing and high working efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of fertilizer production equipment, and in particular relates to a mixer for bio-fertilizer production. Background Technology

[0002] Bio-fertilizers are fertilizers derived from biological organic matter, such as plants and animals, through fermentation, composting, or other treatment methods. Before fermentation, bio-fertilizer raw materials need to be mixed.

[0003] A mixer is a mechanical device that uses mechanical force and gravity to uniformly mix two or more materials. During the mixing process, it can increase the contact surface area of ​​the materials to promote chemical reactions and accelerate physical changes. Before processing the raw materials for mixed bio-fertilizer, they need to be crushed beforehand, and then the crushed raw materials are fed into the mixer for mixing.

[0004] Existing mixers have relatively simple structures, mostly using a single stirring rod to mix bio-fertilizer raw materials. This makes it difficult to achieve thorough mixing in a short time, resulting in low mixing efficiency. Furthermore, crushed bio-fertilizer raw materials tend to clump together during transportation and storage, and existing mixers lack a crushing function, failing to break up the clumps through simple stirring. This affects the mixing effect and efficiency, leading to poor subsequent fermentation. Additionally, during mixing, it is often necessary to add a measured proportion of additives to the mixer. Currently, additives are mostly added by workers using measuring cups or similar containers to first pour the required amount of additive into a container, and then pour the container's additive into the mixer. This method of addition is extremely inefficient, further impacting the mixing efficiency of the bio-fertilizer raw materials. Therefore, there is an urgent need to design a mixer for bio-fertilizer production to solve the above problems. Summary of the Invention

[0005] This invention provides a bio-fertilizer production mixer with a reasonable structural design to solve the technical problems existing in the prior art. This invention can pre-disperse the input bio-fertilizer raw materials and quantitatively weigh and add various additives, resulting in good mixing and high working efficiency.

[0006] The technical solution adopted by this utility model to solve the technical problems existing in the prior art is as follows: A mixer for bio-fertilizer production includes a frame, a mixing tank structure installed on the frame, a discharge port provided at the lower part of the mixing tank structure, a discharge slide provided at the discharge port, and a discharge valve structure provided at the discharge slide; a tank cover is pivotally connected to the top opening of the mixing tank structure, and a cover plate driving component is pivotally connected between the mixing tank structure and the tank cover; a liquid spraying structure connected to a liquid source is installed on the tank cover, and several slots are opened on the tank cover, with each slot... Each component is equipped with a feeding device, and a weighing sensor is installed between each feeding device and the box cover. The feeding device includes a feeding cylinder connected to the box cover via the weighing sensor, and a feeding valve assembly is installed at the lower outlet of the feeding cylinder. The mixing box structure includes a second stirring device and a first stirring device arranged vertically. It also includes a crushing device installed at the top of the mixing box structure and connected to the inner cavity of the mixing box structure. The crushing device includes a feeding crushing box structure, and a roller crushing assembly is installed inside the feeding crushing box structure. The roller crushing assembly is drivenly connected to the second stirring device.

[0007] The advantages and positive effects of this utility model are as follows: This utility model provides a mixer for bio-fertilizer production. By setting up a second mixing device and a first mixing device distributed vertically, double-layer counter-current mixing can be achieved, thereby enhancing material convection, improving mixing effect, shortening mixing time, and thus improving work efficiency. By setting a crushing device on the mixing tank structure, the crushing function is integrated into the top of the mixer, realizing the integration of raw material crushing and mixing processes, solving the problem of uneven mixing of agglomerated raw materials. By setting up several feeding devices and several weighing sensors, the weight of additives can be monitored in real time. When the weight reaches the set value, the feeding valve assembly is closed, realizing the precise feeding of multiple additives without the need for manual weighing of additives, reducing the labor intensity of workers. By setting up a liquid spraying structure, the automatic supply of liquid additives is realized. This utility model can pre-disperse the input bio-fertilizer raw materials and can quantitatively weigh and feed multiple additives, resulting in good mixing effect and high work efficiency.

[0008] Preferably, the mixing box structure includes a box shell fixed to the frame, an inclined top plate fixed to the upper part of the box shell, and an inlet corresponding to the discharge port of the crushing device on the inclined top plate; an inner shell fixed to the box shell, the box shell and the inner shell being fitted together to form a flow channel chamber, an inlet connected to the flow channel chamber being installed at the upper part of the box shell, and an outlet connected to the flow channel chamber being installed at the lower part of the box shell, and control valves being installed at both the inlet and the outlet.

[0009] Preferably, the second stirring device has the same structure as the first stirring device; the first stirring device includes a stirring shaft that runs horizontally through the mixing tank structure and is rotatably connected thereto, a number of stirring connecting rods are installed on the stirring shaft, and a large spiral belt and a small spiral belt are connected to the stirring shaft through the number of stirring connecting rods; it also includes a stirring drive component installed on the mixing tank structure for driving the stirring shaft to rotate.

[0010] Preferably, the roller crushing assembly includes two crushing blade shafts that are rotatably connected and arranged in parallel within the feeding crushing box structure, a gear pair is provided between the ends of the two crushing blade shafts, and a drive transmission pair is installed between one crushing blade shaft and the second stirring device; each crushing blade shaft is equipped with a plurality of crushing discs evenly distributed along its axial direction, and the assembly also includes two guide blocks installed on the inner wall of the feeding crushing box structure, each guide block having a plurality of slots through which the corresponding crushing discs can pass.

[0011] Preferably, the feeding crushing box structure includes a crushing box installed on the mixing box structure corresponding to its feed inlet, a feed hopper installed at the top opening of the crushing box, and a diverter with a triangular cross-section installed at the feed inlet of the feed hopper; it also includes a hopper cover pivotally connected to the top opening of the feed hopper.

[0012] Preferably, the feeding valve assembly includes a valve plate one and a valve plate two pivotally connected to the outlet of the feeding cylinder, the valve plate one and the valve plate two being symmetrically arranged, and a tension spring being installed between the valve plate one and the feeding cylinder; a drive connecting plate one being fixedly connected to the valve plate two at the pivotal connection between the valve plate two and the feeding cylinder, and a drive connecting plate two being pivotally connected to the lower part of the valve plate one; it also includes a valve plate drive component installed on the cover, the valve plate drive component being arranged laterally and a connecting plate push block being installed at its extended end, an installation kit being fixedly connected to the connecting plate push block, and the upper ends of the drive connecting plate one and the drive connecting plate two being pivotally connected by a pin passing through the installation kit.

[0013] Preferably, the liquid spraying structure includes a main inlet pipe connected to a liquid source via a pipeline, a control valve and a pump body installed on the pipeline; several distribution branch pipes are connected to the main inlet pipe, and liquid nozzles penetrating the tank cover are connected to each distribution branch pipe. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the front sectional view of the present invention; Figure 2 This is a partial cross-sectional view of the crushing device in this utility model; Figure 3 This is a three-dimensional structural diagram of the upper structure in this utility model; Figure 4 This is a three-dimensional structural diagram of the feeding device in this utility model; Figure 5 This is a three-dimensional structural diagram of the stirring device one in this utility model; Figure 6 This is a side sectional view of the structure of this utility model.

[0015] In the diagram: 1. Frame; 2. Mixing box structure; 2-1. Outer shell of the box; 2-2. Inner shell of the box; 2-3. Sloping top plate; 3. Mixing device one; 3-1. Mixing drive component; 3-2. Large spiral belt; 3-3. Mixing connecting rod; 3-4. Mixing shaft; 3-5. Small spiral belt; 4. Mixing device two; 5. Cover plate drive component; 6. Crushing device; 6-1. Drive transmission pair; 6-2. Crushing blade disc; 6-3. Crushing blade shaft; 6-4. Guide block; 6-5. Crushing box; 6-6. Diverter; 6-7. Feed hopper; 6-8. Hopper cover; 6-9. 7. Gear pair; 8. Liquid spraying structure; 7-1. Liquid nozzle; 7-2. Liquid distribution branch pipe; 7-3. Liquid inlet main pipe; 9. Feeding device; 8-1. Feeding valve assembly; 8-1-1. Valve plate one; 8-1-2. Valve plate two; 8-1-3. Drive connecting plate one; 8-1-4. Valve plate drive component; 8-1-5. Connecting plate push block; 8-1-6. Drive connecting plate two; 8-2. Feeding cylinder; 10. Weighing sensor; 11. Tank cover; 11. Discharge valve structure; 11-1. Screw seat; 11-2. Discharge lead screw; 11-3. Discharge valve plate; 12. Discharge slide. Detailed Implementation

[0016] To further understand the invention content, features, and effects of this utility model, the following embodiments are provided in detail: Please see Figure 1 The present invention relates to a mixer for producing bio-fertilizer, comprising a frame 1, a mixing box structure 2 mounted on the frame 1, a discharge port at the lower part of the mixing box structure 2, a discharge slide 12 at the discharge port, and a discharge valve structure 11 at the discharge slide 12; a box cover 10 is pivotally connected to the top opening of the mixing box structure 2, and a cover plate drive 5 is pivotally connected between the mixing box structure 2 and the box cover 10, the cover plate drive 5 being a linear cylinder or a linear push rod.

[0017] A liquid spraying structure 7 connected to a liquid source is installed on the tank cover 10. Several slots are opened on the tank cover 10, and a feeding device 8 is set at each slot. A weighing sensor 9 is installed between each feeding device 8 and the tank cover 10. The feeding device 8 includes a feeding cylinder 8-2 connected to the tank cover 10 through the weighing sensor 9. A feeding valve assembly 8-1 is set at the lower outlet of the feeding cylinder 8-2. The weighing sensor 9 is installed between the feeding cylinder 8-2 and the tank cover 10 and can monitor the weight of the additive in real time. When the weight reaches the set value, the feeding valve assembly 8-1 is closed.

[0018] The mixing box structure 2 is provided with a stirring device 2 4 and a stirring device 3 arranged vertically; it also includes a crushing device 6 located at the top of the mixing box structure 2 and communicating with the inner cavity of the mixing box structure 2; the crushing device 6 includes a feeding crushing box structure, and a roller crushing assembly is provided in the feeding crushing box structure, and the roller crushing assembly is connected to the stirring device 2 4 in a transmission.

[0019] like Figure 2 As shown, the above-mentioned feeding and crushing box structure includes a crushing box 6-5 installed on the mixing box structure 2, corresponding to its feed inlet; a feed hopper 6-7 is installed at the top opening of the crushing box 6-5; a diverter 6-6 with a triangular cross-section is installed at the feed inlet of the feed hopper 6-7; and a hopper cover 6-8 pivotally connected to the top opening of the feed hopper 6-7.

[0020] Furthermore, the aforementioned roller crushing assembly includes two crushing blade shafts 6-3 rotatably connected and arranged in parallel within the feeding crushing box structure. A gear pair 6-9 is provided between the ends of the two crushing blade shafts 6-3. A drive transmission pair 6-1 is installed between one crushing blade shaft 6-3 and the stirring device 4. Each crushing blade shaft 6-3 is equipped with a plurality of crushing discs 6-2 evenly distributed along its axial direction. The assembly also includes two guide blocks 6-4 installed on the inner wall of the feeding crushing box structure. Each guide block 6-4 has a plurality of slots through which the corresponding crushing disc 6-2 can pass, the width of which is slightly larger than the diameter of the crushing disc 6-2 to form a dynamic shearing gap. Additionally, each crushing blade shaft 6-3 is equipped with a plurality of spacer sleeves evenly distributed along its axial direction, with the spacer sleeves and crushing discs 6-2 spaced apart. The crushing discs 6-2 installed on the two crushing blade shafts 6-3 are spaced apart.

[0021] The crushing blade shaft 6-3 refers to the rotating shaft that supports the crushing disc 6-2. Specifically, it can be a steel shaft with keyways on its surface, and is rotatably connected to the feed crushing box 6-5 via bearings. The crushing disc 6-2 refers to a disc-shaped blade with cutting edges, which can be made of 10mm thick alloy steel discs with surface carburizing treatment, arranged axially at intervals to form multi-stage crushing zones.

[0022] In addition, the aforementioned drive transmission pair 6-1 includes a driving sprocket keyed to the stirring device 4, and a driven sprocket connected to the end of the crushing blade shaft 6-3. A chain is driven between the driving sprocket and the driven sprocket. The gear pair 6-9 includes a transmission gear keyed to the ends of the two crushing blade shafts 6-3, and the two transmission gears mesh with each other. Specifically, a spur gear set with a module of 3 can be used to ensure that the two crushing blade shafts 6-3 rotate synchronously in opposite directions.

[0023] Specifically, the two crushing blade shafts 6-3 rotate synchronously in opposite directions via a gear pair 6-9, causing adjacent crushing blade discs 6-2 to form a shearing action. When agglomerated material enters the crushing zone, the guide block 6-4 forces the material into the shearing gap formed by the two crushing blade discs 6-2, and the rotating blade discs continuously cut the material. The drive transmission pair 6-1 transmits the power of the stirring device 4 to one of the crushing blade shafts 6-3, realizing the linkage drive of the crushing and stirring processes. The slot on the guide block 6-4 allows the crushing blade discs 6-2 to rotate through, avoiding structural interference and forming a directional material channel. The axially uniformly distributed crushing blade discs 6-2 form a multi-stage crushing zone, which, together with the guiding action of the guide block 6-4, ensures that the material is continuously subjected to shearing force during the crushing process.

[0024] In existing technologies, crushing and mixing require independent drives. This solution achieves power sharing through drive transmission pair 6-1, simplifying the equipment structure. Through the above technical solution, this invention effectively solves the problem of low mixing efficiency caused by the agglomeration of bio-fertilizer raw materials, and achieves coordinated operation of the crushing and mixing processes through a linkage drive structure.

[0025] Specifically, when the material enters the crushing chamber 6-5 through the feed hopper 6-7, the agglomerated portion is forcibly dispersed to both sides by the triangular cross-section of the diverter 6-6, preventing accumulation in the center of the feed inlet. The dispersed material falls evenly into the crushing area, where it is crushed by the roller crushing assembly. The crushed material then enters directly into the mixing chamber structure 2 through the feed inlet, avoiding secondary accumulation. The hopper cover 6-8 remains closed when not in the feeding state and can be quickly opened or closed by rotation, facilitating feeding or maintenance.

[0026] See further Figure 6 In this embodiment, the above-mentioned mixing box structure 2 includes a box shell 2-1 fixedly connected to the frame 1, an inclined top plate 2-3 fixedly connected to the upper part of the box shell 2-1, and an inlet corresponding to the discharge port of the crushing device 6 on the inclined top plate 2-3. The alignment design between the inclined top plate 2-3 and the discharge port of the crushing device 6, compared with the vertical inlet structure in the prior art, allows the material output by the crushing device 6 to be evenly dispersed into the mixing chamber under the action of gravity, avoiding material accumulation in the inlet area, reducing the impact force of material falling, and preventing secondary agglomeration of the crushed material.

[0027] An inner shell 2-2 is fixedly connected inside the outer shell 2-1. The outer shell 2-1 and the inner shell 2-2 are fitted together to form a flow channel chamber. An inlet connected to the flow channel chamber is installed at the upper part of the outer shell 2-1, and an outlet connected to the flow channel chamber is installed at the lower part. Control valves are installed at both the inlet and the outlet.

[0028] Furthermore, the outer casing 2-1 refers to the external load-bearing structure fixed to the frame 1 by welding or bolting. Specifically, it can be formed by welding steel plates with a thickness of 5-10 mm, used to support the internal mixing chamber and form a media circulation channel. The flow channel chamber refers to the annular channel formed between the outer casing 2-1 and the inner casing 2-2, specifically with a gap distance of 5-15 mm, through which the heat exchange medium circulates. The control valve refers to the regulating device installed at the inlet and outlet of the media circulation channel, specifically an electric ball valve or butterfly valve, used to precisely control the media flow rate and circulation speed.

[0029] The double-shell structure allows the inner shell 2-2 to directly contact the mixed materials, while the flow channel chamber between the outer shell 2-1 and the inner shell 2-2 forms an independent media circulation channel. When it is necessary to adjust the mixing temperature, the heat exchange medium is injected into the flow channel chamber through the upper inlet, completes heat exchange with the mixing chamber within the chamber, and then exits from the lower outlet. The operating status of the media circulation system is regulated by a control valve, increasing the media flow rate when rapid heating or cooling is required and reducing energy consumption during normal mixing stages. The inner shell 2-2 is made of stainless steel with good thermal conductivity to ensure efficient heat transfer to the mixed materials.

[0030] Compared to existing technologies, traditional mixers often employ a single-layer casing structure, which fails to achieve precise temperature control, leading to material agglomeration or incomplete reaction during the mixing process. This solution utilizes a media circulation channel formed by a double-layer shell, allowing for the selection of cooling water or steam for temperature regulation based on material characteristics, ensuring the mixing process remains within the optimal reaction temperature range. This invention solves the problem of low material reaction efficiency caused by insufficient temperature control precision during mixing, achieving dynamic adjustment of the mixing temperature through a media circulation system.

[0031] In this embodiment, the structure of the second stirring device 4 is the same as that of the first stirring device 3; see further details. Figure 5 The mixing device 3 includes a mixing shaft 3-4 that runs horizontally through and is rotatably connected to the mixing tank structure 2. Specifically, it can be implemented as a metal shaft with bearings at both ends connected to the side walls of the mixing tank structure 2, used to transmit rotational power and support the mixing rods 3-3 and the spiral belt. Several mixing rods 3-3 are mounted on the mixing shaft 3-4, and it also includes a large spiral belt 3-2 and a small spiral belt 3-5 connected to the mixing shaft 3-4 via the several mixing rods 3-3. It also includes a mixing drive unit 3-1 mounted on the mixing tank structure 2, used to drive the mixing shaft 3-4 to rotate. The mixing drive unit 3-1 refers to a device that provides rotational power, specifically a drive unit combining a motor and a reducer, used to drive the mixing shaft 3-4 to rotate at a set speed.

[0032] The stirring rod 3-3 refers to a rod-shaped connector fixed to the stirring shaft 3-4. It can be implemented using a welded or bolted metal rod, and is used to rigidly connect the large spiral band 3-2 and the small spiral band 3-5 to the stirring shaft 3-4. In this embodiment, the large spiral band 3-2 refers to a spiral-shaped band structure with a large pitch, which can be implemented using a spiral formed by winding a metal sheet, and is used to propel the material along the axial direction. The small spiral band 3-5 refers to a spiral-shaped band structure with a smaller pitch, which can be implemented using a spiral made of the same material as the large spiral band 3-2 but with a reduced pitch, and is used to generate radial shearing action. The diameter of the large spiral band 3-2 can be 2-3 times the diameter of the stirring shaft 3-4, and the diameter of the small spiral band 3-5 can be 1-1.5 times that diameter; the difference in pitch between the two creates material convection.

[0033] Specifically, the stirring shaft 3-4 extends transversely through the mixing tank structure 2 and is supported by bearings for rotation. The stirring drive component 3-1 is connected to the end of the stirring shaft 3-4 via a coupling. When the drive component is activated, the stirring shaft 3-4 drives the large spiral belt 3-2 and the small spiral belt 3-5 welded to its surface to rotate synchronously. Due to its larger pitch, the large spiral belt 3-2 pushes the material axially during rotation, forming longitudinal convection. Due to its smaller pitch and denser blade spacing, the small spiral belt 3-5 applies radial shear force to the material during rotation, causing agglomerated material to break up. The upper and lower stirring devices 3-1 and 4-2 adopt the same structure. The rotation direction of the large spiral belt 3-2 in the upper stirring device 4 is opposite to that in the lower stirring device 3-1, causing the upper material to be conveyed downwards and the lower material to be tumbled upwards, forming bidirectional convection. The stirring connecting rods 3-3 are welded to the shaft at equal intervals to ensure that the large spiral belt 3-2 and the small spiral belt 3-5 remain stable during rotation, avoiding deformation caused by material resistance.

[0034] Compared to existing technologies, current mixers typically employ a single-layer stirring shaft and a single helical blade structure, enabling only unidirectional material flow, limiting mixing efficiency, and failing to effectively break up clumps. This solution utilizes a double-layer stirring device to create bidirectional material convection. Combined with the axial conveying of the large helical belt 3-2 and the radial shearing of the small helical belt 3-5, the material is repeatedly cut while moving longitudinally. The consistent design of the upper and lower stirring devices avoids differences in mixing intensity caused by different structures, while also reducing the complexity of equipment manufacturing. The rigid connection between the stirring rod 3-3 and the helical belt enhances structural stability and prevents deformation during high-speed rotation.

[0035] See further Figure 6The aforementioned discharge valve structure 11 includes a discharge valve plate 11-3 pivotally connected to the discharge port of the mixing tank structure 2. A screw seat 11-1 is mounted on the discharge valve plate 11-3, and an installation rod is rotatably connected to the screw seat 11-1. A discharge lead screw 11-2, perpendicularly arranged to the screw, is connected to the installation rod. The structure also includes a plate seat mounted on the discharge slide 12, a nut rotatably connected to the plate seat and engaging with the discharge lead screw 11-2, and a handwheel for driving the nut to rotate. The discharge valve structure 11 adjusts the opening of the discharge valve plate 11-3 through the lead screw and nut mechanism. Each rotation of the handwheel moves the discharge valve plate 11-3 by 5-10 mm, achieving precise control of the discharge flow rate.

[0036] See further Figure 4 The aforementioned feeding valve assembly 8-1 includes a valve plate 8-1-1 and a valve plate 8-1-2 pivotally connected to the outlet of the feeding cylinder 8-2. The valve plate 8-1-1 and the valve plate 8-1-2 are symmetrically arranged, and a tension spring is installed between the valve plate 8-1-1 and the feeding cylinder 8-2. A drive connecting plate 8-1-3 fixedly connected to the valve plate 8-1-2 is provided at the pivotal connection between the valve plate 8-1-2 and the feeding cylinder 8-2. A drive connecting plate 8-1-6 is pivotally connected to the lower part of the valve plate 8-1-1. The assembly also includes a valve plate drive component 8-1-4 installed on the cover 10. The valve plate drive component 8-1-4 can be a linear cylinder or a linear push rod. The valve plate drive component 8-1-4 is arranged laterally and a connecting plate push block 8-1-5 is installed at its extended end. An installation kit is fixedly connected to the connecting plate push block 8-1-5. The upper ends of the drive connecting plate one 8-1-3 and the drive connecting plate two 8-1-6 are pivotally connected by a pin passing through the installation kit.

[0037] The pivotal connection between valve plate 8-1-1 and valve plate 8-1-2 refers to their rotatable connection to the feeding cylinder 8-2 via rotating shafts. This can be achieved using a hinge structure, with their symmetrical arrangement forming a closed surface to seal the discharge port. The tension spring is an elastic reset element, with its two ends fixed to the side walls of valve plate 8-1-1 and feeding cylinder 8-2 respectively. It provides a reverse tension force when the valve plate drive component 8-1-4 retracts, causing valve plate 8-1-1 to reset and seal.

[0038] Specifically, when the valve plate drive component 8-1-4 pushes the connecting plate push block 8-1-5 to move laterally, the mounting kit drives the upper ends of the first driving connecting plate 8-1-3 and the second driving connecting plate 8-1-6 to move synchronously. Driven by the thrust, the first driving connecting plate 8-1-3 drives the second valve plate 8-1-2 to rotate and open around the pivot point. Simultaneously, driven by the tension, the second driving connecting plate 8-1-6 pulls the first valve plate 8-1-1 to rotate and open in the opposite direction against the resistance of the tension spring. The symmetrical opening action of the two valve plates forms a bidirectional opening adjustment channel, allowing the additive material to fall evenly through the symmetrically unfolded opening. When the valve plate drive component 8-1-4 retracts, the tension spring pulls the first valve plate 8-1-1 back to its original position and closes. The second driving connecting plate 8-1-6 moves in the opposite direction, driving the second valve plate 8-1-2 to close synchronously. The two valve plates achieve sealing under the combined action of the tension spring and mechanical linkage.

[0039] Through the above technical solution, this application achieves precise control of additive flow rate, solving the problem of low efficiency in manual addition. The dual-valve plate linkage mechanism simplifies the drive structure while ensuring coordinated opening and closing actions through mechanical synchronization, avoiding flow fluctuations caused by valve plate asynchrony. The cooperation design between the tension spring and the drive connecting plate creates a double seal when the valve plate is closed, effectively preventing material residue and leakage, and ensuring the measurement accuracy of the weighing sensor 9. The pivotal connection structure between the mounting kit and the pin allows the drive connecting plate to adaptively adjust its angle during movement, improving the system's adaptability to different working conditions.

[0040] See further Figure 3 The aforementioned liquid spraying structure 7 includes a main inlet pipe 7-3 connected to a liquid source via a pipeline, on which a control valve and a pump body are installed; a number of distribution branch pipes 7-2 are connected to the main inlet pipe 7-3, and each distribution branch pipe 7-2 is connected to a liquid nozzle 7-1 that penetrates the cover 10.

[0041] The main inlet pipe 7-3 refers to the pipeline structure used for centralized delivery of liquid additives. It can be made of stainless steel or corrosion-resistant plastic pipe, and connects to the liquid source to form a closed supply path, preventing liquid leakage. The control valve is a device used to regulate liquid flow, such as a solenoid valve or pneumatic valve, which controls its opening and closing state via electrical signals to achieve start-stop operation. The pump body is the equipment that provides power for liquid delivery, such as a centrifugal pump or gear pump, used to maintain stable liquid pressure within the pipeline. The distribution branch pipe 7-2 is a secondary pipeline connected to the main inlet pipe 7-3, and can be arranged in a branched pipeline layout to evenly distribute the liquid to multiple spray points. The liquid nozzle 7-1 is the end-effector that atomizes or disperses the liquid, such as a fan-shaped nozzle or a spiral nozzle, which penetrates the cover 10 to directly spray the liquid onto the surface of the mixture.

[0042] Specifically, the liquid additive is drawn from the liquid source to the main inlet pipe 7-3 via a pump. The control valve adjusts the flow rate and start / stop timing according to a preset program. The liquid is then distributed to multiple liquid nozzles 7-1 via the distribution branch pipe 7-2. The nozzles penetrate the tank cover 10 and extend directly into the mixing tank, forming a comprehensive spray path. The pump maintains stable pipeline pressure to ensure uniform liquid output from each nozzle. The control valve and the weighing sensor 9 work together to achieve quantitative addition. After being atomized at the nozzles, the liquid disperses to the surface of the material, ensuring full contact with the solid material and preventing excessively high local concentrations or clumping.

[0043] Compared to existing technologies, current mixers rely on manual measurement of liquid additives, resulting in low efficiency and poor accuracy. This solution achieves automatic liquid delivery through a closed-loop pipeline system. The control valve and pump work together to precisely adjust the flow rate, and the distribution branch pipe 7-2 and multi-nozzle structure ensure that the spraying range covers the entire mixing area. Compared to the traditional single-point pouring method, this technology solves the technical defects of uneven liquid distribution and difficulty in controlling the amount added.

[0044] Through the above technical solution, this application achieves automated quantitative supply of liquid additives, avoiding human error. Multi-nozzle coverage spraying ensures uniform dispersion of the liquid into the material, improving mixing efficiency and uniformity. The combination of control valve and pump body allows for real-time flow adjustment to meet different mixing ratio requirements, solving the problems of low liquid addition efficiency and insufficient precision in existing technologies.

[0045] like Figure 4 As shown, this embodiment also includes a mounting frame fixed to the box cover 10. The valve plate drive component 8-1-4 is mounted on the mounting frame. Several sensor frames are mounted on the mounting frame. Mounting corner pieces corresponding to the several sensor frames are mounted on the feeding cylinder 8-2. The corresponding weighing sensors 9 are mounted between the sensor frames and the mounting corner pieces.

[0046] Working principle: Raw materials are evenly distributed to the roller crushing assembly via the triangular diverter 6-6 of the crushing device 6. The rotating cutter disc breaks up agglomerated materials, which then fall into the mixing box. The stirring device 4 drives the crushing cutter shaft 6-3 to rotate. Under the action of the double-layer stirring device, the large spiral belt 3-2 pushes the material axially, while the small spiral belt 3-5 generates radial agitation, forming a three-dimensional mixing flow field. The liquid spraying structure 7 atomizes and sprays liquid additives through multiple nozzles, while the feeding device 8 accurately adds solid additives based on feedback from the weighing sensor 9. After mixing is completed, the handwheel is rotated to adjust the opening of the discharge valve plate 11-3, and the mixed material is discharged controllably along the discharge slide 12.

[0047] Compared with existing technologies, this utility model integrates the raw material crushing and mixing processes, solving the problem of uneven mixing of agglomerated raw materials. In addition, traditional mixers require additional crushing equipment, while this solution saves equipment investment by linking the roller crushing component with the stirring power. The double-layer stirring structure greatly shortens the mixing time and improves work efficiency.

Claims

1. A mixer for bio-fertilizer production, characterized in that: The system includes a frame (1), on which a mixing tank structure (2) is installed. A discharge port is located at the bottom of the mixing tank structure (2), and a discharge slide (12) is located at the discharge port. A discharge valve structure (11) is located at the discharge slide (12). A tank cover (10) is pivotally connected to the top opening of the mixing tank structure (2). A cover drive (5) is pivotally connected between the mixing tank structure (2) and the tank cover (10). A liquid spraying structure (7) connected to a liquid source is installed on the tank cover (10). Several slots are opened on the tank cover (10), and a feeding device (8) is provided at each slot. A feeding device (8) is connected to the tank cover (10). Weighing sensors (9) are installed between 10); the feeding device (8) includes a feeding cylinder (8-2) connected to the box cover (10) via the weighing sensor (9), and a feeding valve assembly (8-1) is provided at the lower discharge port of the feeding cylinder (8-2); a stirring device two (4) and a stirring device one (3) are provided in the mixing box structure (2) in an up-down arrangement; it also includes a crushing device (6) provided at the top of the mixing box structure (2) and connected to the inner cavity of the mixing box structure (2); the crushing device (6) includes a feeding crushing box structure, and a roller crushing assembly is provided in the feeding crushing box structure, and the roller crushing assembly is connected to the stirring device two (4) in a transmission connection.

2. The mixer for bio-fertilizer production as described in claim 1, characterized in that: The mixing box structure (2) includes a box shell (2-1) fixed to the frame (1), an inclined top plate (2-3) fixed to the upper part of the box shell (2-1), and an inlet corresponding to the discharge port of the crushing device (6) on the inclined top plate (2-3); a box inner shell (2-2) fixed inside the box shell (2-1), the box shell (2-1) and the box inner shell (2-2) are fitted together to form a flow channel chamber, an inlet connected to the flow channel chamber is installed at the upper part of the box shell (2-1), and an outlet connected to the flow channel chamber is installed at the lower part, and control valves are installed at both the inlet and the outlet.

3. The mixer for bio-fertilizer production as described in claim 1, characterized in that: The structure of the second stirring device (4) is the same as that of the first stirring device (3); the first stirring device (3) includes a stirring shaft (3-4) that runs horizontally through the mixing tank structure (2) and is rotatably connected to it, and several stirring connecting rods (3-3) are installed on the stirring shaft (3-4), as well as a large spiral belt (3-2) and a small spiral belt (3-5) connected to the stirring shaft (3-4) through several stirring connecting rods (3-3); it also includes a stirring drive component (3-1) installed on the mixing tank structure (2) for driving the stirring shaft (3-4) to rotate.

4. The mixer for bio-fertilizer production as described in claim 1, characterized in that: The roller crushing assembly includes two crushing blade shafts (6-3) that are rotatably connected and arranged in parallel within the feeding crushing box structure. A gear pair (6-9) is provided between the ends of the two crushing blade shafts (6-3). A drive transmission pair (6-1) is installed between one crushing blade shaft (6-3) and the second stirring device (4). Several crushing blade discs (6-2) are evenly distributed along their axial direction on each crushing blade shaft (6-3). The assembly also includes two guide blocks (6-4) installed on the inner wall of the feeding crushing box structure. Several slots are provided on each guide block (6-4) for the corresponding crushing blade disc (6-2) to pass through.

5. The mixer for bio-fertilizer production as described in claim 1, characterized in that: The feeding crushing box structure includes a crushing box (6-5) installed on the mixing box structure (2) corresponding to its feed inlet, a feed hopper (6-7) installed at the top opening of the crushing box (6-5), and a diverter (6-6) with a triangular cross-section installed at the feed inlet of the feed hopper (6-7); it also includes a hopper cover (6-8) pivotally connected to the top opening of the feed hopper (6-7).

6. The mixer for bio-fertilizer production as described in claim 1, characterized in that: The feeding valve assembly (8-1) includes a valve plate one (8-1-1) and a valve plate two (8-1-2) pivotally connected to the outlet of the feeding cylinder (8-2). The valve plate one (8-1-1) and the valve plate two (8-1-2) are symmetrically arranged, and a tension spring is installed between the valve plate one (8-1-1) and the feeding cylinder (8-2). A drive connecting plate one (8-1-3) fixedly connected to the valve plate two (8-1-2) is provided at the pivotal connection between the valve plate two (8-1-2) and the feeding cylinder (8-2). A drive connecting plate two (8-1-6) is pivotally connected to the lower part of valve plate one (8-1-1); it also includes a valve plate drive component (8-1-4) installed on the cover (10), the valve plate drive component (8-1-4) is arranged laterally and a connecting plate push block (8-1-5) is installed at its extended end, and an installation kit is fixedly connected to the connecting plate push block (8-1-5), and the upper ends of drive connecting plate one (8-1-3) and drive connecting plate two (8-1-6) are pivotally connected by a pin passing through the installation kit.

7. The mixer for bio-fertilizer production as described in claim 1, characterized in that: The liquid spraying structure (7) includes a main inlet pipe (7-3) connected to the liquid source via a pipeline, and a control valve and a pump body are installed on the pipeline; several distribution branch pipes (7-2) are connected to the main inlet pipe (7-3), and liquid nozzles (7-1) that penetrate the box cover (10) are connected to each distribution branch pipe (7-2).

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