Microbial fertilizer mixing device
By employing a mixing system with bent paddles and spiral blades and gas aeration in the microbial fertilizer mixing device, combined with temperature control and pneumatic butterfly valve design, the problems of uneven mixing and cross-contamination of microbial agents are solved, achieving high efficiency, stable microbial activity and low residue rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2026-04-14
AI Technical Summary
Traditional mixing devices struggle to achieve three-dimensional uniform mixing of microbial agents and organic materials, failing to increase dissolved oxygen, thus affecting microbial activity and easily causing cross-contamination and cleaning difficulties.
The mixing system uses a combination of upper bent blades and lower spiral blades, combined with gas aeration and temperature control. It achieves uniform mixing of solid, liquid and gas phases through a limiting groove design. It is equipped with a heating jacket and temperature sensor to maintain the optimal fermentation temperature, and uses a pneumatic butterfly valve to achieve discharge without dead corners.
It achieves efficient and uniform mixing of microbial agents and organic materials, increases microbial activity by 20%, reduces residue rate to 0.5%, ensures fermentation temperature stability, and reduces the risk of cross-contamination.
Smart Images
Figure CN224113758U_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of agricultural microbial fertilizer production equipment, specifically relating to a microbial fertilizer mixing device. Background Technology
[0002] Microbial fertilizers are developed based on the principles of soil microecology, plant nutrition, and the basic concepts of modern organic agriculture. Microbial fertilizers are a new type of fertilizer biological product that uses the life activities of active (reproducing) microorganisms to enable crops to obtain the nutrients (fertilizer) they need. They are a type of fertilizer in agricultural production (also known as third-generation fertilizers).
[0003] Microbial fertilizer is a type of bio-fertilizer made by mixing functional microorganisms (such as nitrogen-fixing bacteria and phosphate-solubilizing bacteria) with an organic carrier. Its core function is to maintain the activity of the microorganisms and ensure uniform mixing of the microbial agent and the carrier. However, traditional mixing devices have the following problems: ordinary stirring equipment struggles to achieve three-dimensional uniform mixing of the microbial agent and organic materials, leading to excessively high or low concentrations of the microbial agent in certain areas, affecting fertilizer efficiency; aerobic microorganisms require sufficient oxygen during mixing, but traditional stirring methods cannot effectively increase dissolved oxygen, resulting in decreased microbial activity; microbial fermentation is temperature-sensitive (typically requiring 25-35℃), but existing equipment lacks precise temperature control, easily affecting microbial activity due to localized overheating or underheating; and materials easily adhere to the bottom of the mixing chamber and stirring components, causing batch-to-batch cross-contamination and making cleaning difficult.
[0004] Therefore, a microbial fertilizer mixing device is needed to solve the problems existing in the current technology. Utility Model Content
[0005] The purpose of this invention is to provide a microbial fertilizer mixing device to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this invention provides the following technical solution: a microbial fertilizer mixing device, comprising a base and a controller. Fixing plates are fixedly connected to both sides of the upper middle portion of the base. A plurality of fixing rings are fixedly connected to opposite sides of the symmetrical fixing plates. The middle portions of each fixing ring are fixedly connected to the outer surface of a mixing chamber. The upper and lower ends of the mixing chamber are respectively semi-circular or conical. A fixing frame is fixedly connected to the upper middle portion of the mixing chamber. The fixing frame is U-shaped, and a motor or air pump is fixedly connected to the upper middle portion of the fixing frame. The main shaft of the motor passes through and is slidably connected to the inside of the mixing chamber via a reducer. The upper outer surface of the main shaft... The surface is equipped with several stirring paddles, and the lower outer surface of the main shaft is equipped with helical blades. The upper stirring paddles are multiple sets of radially distributed bent blades, and the lower helical blades are a continuous helical structure. The two are spaced apart along the axial direction of the main shaft. A discharge plate is fixedly connected to the outer surface of the bottom end of the main shaft. The discharge plate is trapezoidal, and its lower end is slidably connected to the inner surface of the lower end of the mixing chamber. The inner curved surface of the mixing chamber is provided with several limiting grooves, and a discharge port is provided in the middle of the lower end of the mixing chamber. A discharge device is fixedly connected to the outside of the discharge port. A feed port is provided on one side of the upper end of the mixing chamber, and a sealing door is provided on the outside of the feed port.
[0007] It should be noted in the solution that the four corners of the bottom of the base are equipped with omnidirectional wheels with locking function.
[0008] It is worth noting that both sides of the upper end of the base are fixedly connected to the middle of one side of the corresponding fixed plate by inclined support plates, and a controller is installed on the upper end of one side of the inclined support plate.
[0009] Furthermore, it should be noted that the output end of the air pump is connected to a connecting pipe, the other end of the connecting pipe is connected to a diversion pipe, the diversion pipe is connected to several ventilation pipes, the end of the ventilation pipe passes through the bottom of the mixing chamber and is controlled by an air outlet valve, and each air outlet valve is provided with a valve handle on one side, and each ventilation pipe is provided with several aeration heads on the side inside the mixing chamber, and the ventilation pipe is located in a limiting groove.
[0010] In a preferred embodiment, a temperature sensor is provided on one side of the mixing chamber, and the temperature sensor is electrically connected to the controller.
[0011] In a preferred embodiment, a heating jacket is fixedly connected to the outer side of the curved surface in the middle of the mixing chamber. The heating jacket is provided with an electric heating wire arranged in a spiral pattern. The outer side of the heating jacket is covered with an insulation layer, which is made of aluminum silicate fiber material and has a thickness of 2030mm.
[0012] In a preferred embodiment, the discharge device includes a discharge pipe and a pneumatic butterfly valve, wherein the pneumatic butterfly valve is controlled in conjunction with a controller via a solenoid valve.
[0013] In a preferred embodiment, the surface of the blades of the upper stirring paddle is provided with through holes, the through holes having a diameter of 35 mm and being distributed in a honeycomb pattern.
[0014] Compared with the prior art, the microbial fertilizer mixing device provided by this invention has at least the following beneficial effects:
[0015] By combining upper-layer bent blades, lower-layer spiral blades, and an inner wall aeration system, a synergistic effect of radial shear force, axial thrust, and gas disturbance is achieved, enabling the organic materials, microbial agents, and air to achieve uniform three-phase mixing of solid, liquid, and gas, increasing the mixing efficiency by more than 30% and the microbial agent dispersion (coefficient of variation) by 5%.
[0016] The trapezoidal discharge plate and the conical bottom of the silo slide together to automatically scrape off residual materials from the silo wall during rotation. Combined with the pneumatic butterfly valve linkage control, it achieves discharge without dead corners, with a residue rate of <0.5%, significantly reducing batch-to-batch contamination. The combination of heating jacket, temperature sensor and insulation layer maintains the optimal fermentation temperature range of 25-35℃, with a temperature difference fluctuation of 1℃. The honeycomb perforated stirring paddle increases the dissolved oxygen area, improving the cell survival rate by 20% to 25%. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the front structure of this novel invention;
[0018] Figure 2 This is a schematic diagram of the hybrid warehouse structure of this novel design. Figure 1 ;
[0019] Figure 3 This is a schematic diagram of the hybrid warehouse structure of this novel design. Figure 2 ;
[0020] Figure 4 This is a schematic diagram of the structure of the novel aeration system. Figure 1 ;
[0021] Figure 5 This is a schematic diagram of the structure of the novel aeration system. Figure 2 .
[0022] In the diagram: 1. Base; 101. Inclined support plate; 102. Casters; 2. Fixing plate; 3. Fixing ring; 4. Mixing chamber; 401. Feed inlet; 402. Sealing door; 403. Discharge outlet; 404. Limiting groove; 5. Fixing frame; 6. Reducer; 7. Motor; 701. Main shaft; 702. Agitator; 7021. Through hole; 703. Spiral blade; 704. Discharge plate; 8. Air pump; 801. Connecting pipe; 802. Diverter pipe; 803. Ventilation pipe; 804. Aeration head; 805. Air outlet valve; 806. Valve handle; 9. Insulation layer; 10. Heating jacket; 1001. Electric heating wire; 11. Discharge device; 1101. Pneumatic butterfly valve; 1102. Discharge pipe; 1103. Solenoid valve; 12. Temperature sensor; 13. Controller. Detailed Implementation
[0023] The present invention will be further described below with reference to embodiments.
[0024] Please see Figure 1-5 This invention provides a microbial fertilizer mixing device, comprising: a base 1 and a controller 13. Fixing plates 2 are fixedly connected to both sides of the upper middle portion of the base 1. Several fixing rings 3 are fixedly connected to opposite sides of the symmetrical fixing plates 2. The middle portions of the fixing rings 3 are fixedly connected to the outer surface of a mixing chamber 4. The upper and lower ends of the mixing chamber 4 are respectively semi-circular or conical. A fixing frame 5 is fixedly connected to the upper middle portion of the mixing chamber 4. The fixing frame 5 is U-shaped, and a motor 7 or an air pump 8 is fixedly connected to the upper middle portion of the fixing frame 5. The main shaft 701 of the motor 7 passes through and is slidably connected to the inside of the mixing chamber 4 via a reducer 6. Several stirring paddles 702 are installed on the upper outer surface of the main shaft 701. 01 The lower outer surface is equipped with a spiral blade 703, the upper stirring paddle 702 is a radially distributed set of bent blades, and the lower spiral blade 703 is a continuous spiral structure. The two are spaced apart along the axial direction of the main shaft 701. The bottom outer surface of the main shaft 701 is fixedly connected to a discharge plate 704. The discharge plate 704 is trapezoidal, and its lower end is slidably connected to the lower inner surface of the mixing chamber 4. The inner curved surface of the mixing chamber 4 is provided with several limiting grooves 404, and the middle of the lower end of the mixing chamber 4 is provided with a discharge port 403. The discharge device 11 is fixedly connected to the outside of the discharge port 403. The upper side of the mixing chamber 4 is provided with a feed port 401, and the outside of the feed port 401 is provided with a sealing door 402.
[0025] Further as Figure 1 As shown, it is worth noting that the four corners of the base 1 are equipped with locking casters 102. The locking casters 102 enable the device to be quickly moved to the field or production workshop, adapting to the needs of decentralized production and reducing material transportation costs.
[0026] Further as Figure 1As shown, it is worth noting that the upper sides of the base 1 are fixedly connected to the middle of the corresponding fixed plate 2 on one side by inclined support plates 101. A controller 13 is installed on the upper end of one inclined support plate 101. The inclined support plate 101 enhances the connection rigidity between the fixed plate 2 and the base 1, resists the torsional vibration generated by stirring, and extends the service life of the equipment. The controller 13 is installed above the inclined support plate, and the operation interface is tilted to face the user, which is convenient for real-time monitoring and adjustment of parameters (such as temperature and speed). The controller 13 integrates temperature control, material discharge and aeration adjustment, realizes one-button operation, and reduces manual intervention by 50%.
[0027] Further as Figure 4 and Figure 5 As shown, it is worth noting that the output end of the air pump 8 is connected to a connecting pipe 801, and the other end of the connecting pipe 801 is connected to a diversion pipe 802. The diversion pipe 802 is connected to several ventilation pipes 803. The end of the ventilation pipe 803 passes through the bottom of the mixing chamber 4 and is controlled by an air outlet valve 805. Each side of the air outlet valve 805 is equipped with a valve handle 806. Each side of the ventilation pipe 803 inside the mixing chamber 4 is equipped with several aeration heads 804. The ventilation pipe 803 is located in a limiting groove 404. The aeration heads 804 are fixed to the inside of the chamber wall through the limiting groove 404 to avoid stirring interference and to uniformly release microbubbles, providing sufficient oxygen (dissolved oxygen 5mg / L) for aerobic microorganisms. The diversion pipe 802 and the air outlet valve 805 realize zoned air control, which can adjust the local aeration intensity according to the amount of material. The energy consumption of the air pump is reduced by 20%, and condensate or residual liquid can be discharged periodically to avoid liquid accumulation corrosion or scaling and prevent the microbial fertilizer particles from clogging the pores.
[0028] The solution has the following working process: the mixing chamber 4 has a volume of 500L, the motor 7 has a power of 5.5kW, the heating jacket 10 has a temperature control range of 25-40℃, the mixing time, aeration frequency and discharge program are set by the controller 13, after the material is put in through the feed port 401, the double-layer mixing mechanism (upper layer mixing paddle 702 and lower layer spiral blade 703) runs, and finally the material is discharged through the discharge port 403 and the discharge device 11.
[0029] As can be seen from the above working process: the locking casters 102 enable the device to be quickly transferred to the field or production workshop, adapting to the needs of decentralized production and reducing material transportation costs. The inclined support plate 101 enhances the connection rigidity between the fixed plate 2 and the base 1, resisting the torsional vibration generated by stirring and extending the equipment life. The controller 13 is installed above the inclined support plate, with the operating interface tilted towards the user, facilitating real-time monitoring and adjustment of parameters (such as temperature and speed). The controller 13 integrates temperature control, material discharge, and aeration adjustment, enabling one-button operation and reducing manual intervention by 50%. The aeration head 804 is fixed inside the bin wall through the limiting groove 404 to avoid stirring interference and uniformly release microbubbles, providing sufficient oxygen (dissolved oxygen 5mg / L) for aerobic microorganisms. The diversion pipe 802 and the air outlet valve 805 enable zoned air control, allowing adjustment of local aeration intensity according to the amount of material, reducing air pump energy consumption by 20%, and periodically discharging condensate or residual liquid to prevent liquid accumulation corrosion or scaling and prevent the microbial fertilizer particles from clogging the pores.
[0030] Further as Figure 3 As shown, it is worth noting that a temperature sensor 12 is installed on one side of the mixing chamber 4. The temperature sensor 12 is electrically connected to the controller 13. The temperature inside the mixing chamber 4 is monitored in real time through the electrically connected temperature sensor 12. The controller 13 automatically adjusts the power of the heating jacket 10 to maintain the optimal fermentation temperature of 25-35℃ (with an error of 1℃), avoiding the killing of functional bacteria by high temperature. In addition, an alarm is triggered when the temperature is abnormal (such as local overheating) to prevent material carbonization or equipment damage. Temperature curve recording is also supported to provide a basis for process optimization.
[0031] Further as Figure 2 and Figure 3 As shown, it is worth noting that a heating jacket 10 is fixedly connected to the outer side of the curved surface in the middle of the mixing chamber 4. The heating jacket 10 is equipped with a spiral electric heating wire 1001. The heating jacket 10 is covered with an insulation layer 9, which is made of aluminum silicate fiber material with a thickness of 2030mm. The spiral electric heating wire 1001 increases the heat conduction area, increases the heating rate by 30%, and makes the temperature distribution more uniform (temperature difference in the chamber is 2℃). The aluminum silicate fiber insulation layer 9 (2030mm) reduces heat loss. Compared with the device without insulation layer 9, it saves more than 40% energy and ensures that the appropriate activity temperature of the bacterial agent can still be maintained when operating outdoors in winter.
[0032] Further as Figure 2 and Figure 3As shown, it is worth noting that the discharge device 11 includes a discharge pipe 1102 and a pneumatic butterfly valve 1101. The pneumatic butterfly valve 1101 is controlled by the controller 13 in conjunction with the solenoid valve 1103. The pneumatic butterfly valve 1101 opens and closes quickly (response time < 1s), and works with the trapezoidal discharge plate 704 to scrape the material, ensuring that the viscous bacterial fertilizer is completely discharged (residue rate < 0.3%). The pneumatic system controlled by the solenoid valve 1103 avoids the invasion of miscellaneous bacteria caused by manual operation, keeping the fermentation environment pure. The controller can be programmed to realize timed and quantitative discharge, which is suitable for continuous production.
[0033] Further as Figure 3 As shown, it is worth noting that the surface of the upper stirring paddle 702 is provided with through holes 7021. The diameter of the through holes 7021 is 35mm and they are distributed in a honeycomb pattern. The through holes 7021 (35mm) generate micro-turbulence during stirring, breaking up the bacterial agent clumps and improving the dispersion uniformity by 25%. The honeycomb distribution of the through holes also reduces the weight of the paddle, reduces the motor load by 15%, and extends the service life. Furthermore, when the material passes through the through holes 7021, the friction removes the surface adhering layer, preventing the bacterial film from accumulating and contaminating the next batch.
[0034] In summary: The mixing chamber 4 has a volume of 500L, the motor 7 has a power of 5.5kW, and the heating jacket 10 has a temperature control range of 25-40℃. The controller 13 sets the stirring time, aeration frequency, and discharge program. After the material is fed into the inlet 401, the double-layer stirring mechanism (upper stirring paddle 702 and lower spiral blade 703) operates. Finally, the material is discharged through the outlet 403 and the discharge device 11. The controller 13 automatically adjusts the power of the heating jacket 10 to maintain the optimal fermentation temperature of 25-35℃ (with an error of 1℃), preventing the high temperature from killing functional bacteria. An alarm is triggered for abnormal temperatures (such as localized overheating) to prevent material carbonization or equipment damage. Temperature curve recording is supported, providing a basis for process optimization. The spiral electric heating wire 1001 increases the heat conduction area, improving the heating rate by 30% and resulting in a more uniform temperature distribution (temperature difference within the chamber is 2℃). Furthermore, the aluminosilicate fiber ensures... The insulation layer 9 (2030mm) reduces heat loss, saving more than 40% energy compared to devices without insulation layer 9, and ensuring that the appropriate activity temperature of the microbial agent can still be maintained during outdoor operations in winter. The pneumatic butterfly valve 1101 opens and closes quickly (response time <1s), and the trapezoidal discharge plate 704 scrapes the material, ensuring that the viscous microbial fertilizer is completely discharged (residue rate <0.3%). The pneumatic system controlled by the solenoid valve 1103 avoids the intrusion of miscellaneous bacteria caused by manual operation, keeping the fermentation environment pure. The controller can be programmed to realize timed and quantitative discharge, which is suitable for continuous production. The through hole 7021 (35mm) generates micro-turbulence during stirring, breaking up microbial agent clumps and improving the dispersion uniformity by 25%. The honeycomb distribution of through holes reduces the weight of the paddle blades, reduces the motor load by 15%, and extends the service life. When the material passes through the through hole 7021, the friction removes the surface adhering layer, preventing the accumulation of microbial film and contamination of the next batch.
[0035] The foregoing has shown and described the basic principles, main features, and advantages of this invention. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this invention is defined by the appended claims and their equivalents.
Claims
1. A microbial fertilizer mixing device, comprising a base (1) and a controller (13), characterized in that: The base (1) has fixed plates (2) fixedly connected to both sides of the upper middle part. Several fixed rings (3) are fixedly connected to the opposite sides of the fixed plates (2). The middle part of each fixed ring (3) is fixedly connected to the outer surface of the mixing chamber (4). The upper and lower ends of the mixing chamber (4) are semi-circular or conical respectively. A fixed frame (5) is fixedly connected to the middle of the upper end of the mixing chamber (4). The fixed frame (5) is U-shaped. A motor (7) or an air pump (8) is fixedly connected to the middle of the upper end of the fixed frame (5). The main shaft (701) of the motor (7) is slidably connected to the inside of the mixing chamber (4) through a reducer (6). Several stirring paddles (702) are installed on the upper outer surface of the main shaft (701). Spiral blades are installed on the lower outer surface of the main shaft (701). The upper stirring blade (702) is a radially distributed set of bent blades, and the lower spiral blade (703) is a continuous spiral structure. The two are spaced apart along the axial direction of the main shaft (701). A discharge plate (704) is fixedly connected to the outer surface of the bottom end of the main shaft (701). The discharge plate (704) is trapezoidal, and its lower end is slidably connected to the inner surface of the lower end of the mixing chamber (4). The inner curved surface of the mixing chamber (4) is provided with several limiting grooves (404), and the middle of the lower end of the mixing chamber (4) is provided with a discharge port (403). A discharge device (11) is fixedly connected to the outside of the discharge port (403). A feed port (401) is provided on one side of the upper end of the mixing chamber (4), and a sealing door (402) is provided on the outside of the feed port (401).
2. The microbial fertilizer mixing device according to claim 1, characterized in that: The base (1) is equipped with four universal wheels (102) with locking function at the bottom corners.
3. The microbial fertilizer mixing device according to claim 1, characterized in that: The upper sides of the base (1) are fixedly connected to the middle of one side of the corresponding fixed plate (2) by inclined support plates (101), and a controller (13) is installed on the upper end of the inclined support plate (101) on one side.
4. The microbial fertilizer mixing device according to claim 1, characterized in that: The output end of the air pump (8) is connected to a connecting pipe (801), and the other end of the connecting pipe (801) is connected to a diversion pipe (802). The diversion pipe (802) is connected to several ventilation pipes (803). The end of the ventilation pipe (803) passes through the bottom of the mixing chamber (4) and is controlled by an air outlet valve (805). Each side of the air outlet valve (805) is provided with a valve handle (806). Each side of the ventilation pipe (803) located inside the mixing chamber (4) is provided with several aeration heads (804). The ventilation pipe (803) is located in the limiting groove (404).
5. The microbial fertilizer mixing device according to claim 1, characterized in that: A temperature sensor (12) is provided on one side of the mixing chamber (4), and the temperature sensor (12) is electrically connected to the controller (13).
6. The microbial fertilizer mixing device according to claim 1, characterized in that: A heating jacket (10) is fixedly connected to the outer side of the curved surface in the middle of the mixing chamber (4). The heating jacket (10) is provided with an electric heating wire (1001) in a spiral pattern. The heating jacket (10) is covered with an insulation layer (9) on the outside. The insulation layer (9) is made of aluminum silicate fiber material with a thickness of 2030mm.
7. The microbial fertilizer mixing device according to claim 1, characterized in that: The discharge device (11) includes a discharge pipe (1102) and a pneumatic butterfly valve (1101). The pneumatic butterfly valve (1101) is controlled in conjunction with the controller (13) through a solenoid valve (1103).
8. The microbial fertilizer mixing device according to claim 1, characterized in that: The surface of the blade of the upper stirring paddle (702) is provided with through holes (7021), the through holes (7021) have a diameter of 35mm and are distributed in a honeycomb pattern.