Self-circulation stirring type bio-bacteria fertilizer fermentor

Abstract

The utility model belongs to biological bacterial fertilizer production equipment technical field discloses a self -circulation stirring type biological bacterial fertilizer fermentation tank, aims at solving the problem such as uneven stirring, material deposition, unstable vibration of existing equipment. It includes the rounded table conical tank body, stirring motor, support base, bottom motor, vibration mechanism and control box, stirring motor output end is connected with the propeller blade in the tank, and the outer diameter of blade gradually changes and adapts the tank wall, the vibration mechanism contains multiple groups of angle staggered eccentric blocks, and the tank body is connected through the flange protection connecting sleeve with buffer rubber layer, the support base is equipped with annular elastic support seat, and the control box wire passes through the base threading hole. The equipment passes through the structure optimization, realizes material full stirring, vibration stable transmission, reduces the component loss and line interference, guarantees the fermentation environment seal, and the flange interface etc. meet the industry standard, can directly replace the existing equipment, and the maintenance is convenient.

Description

Technical Field

[0001] This utility model belongs to the technical field of biological fertilizer production equipment, specifically relating to a self-circulating stirring biological fertilizer fermentation tank. Background Technology

[0002] A bio-fertilizer fermentation tank is a specialized piece of equipment used to mix organic materials with biological agents for fermentation, producing bio-fertilizer. Its core function is to promote microbial reproduction and metabolism by providing suitable temperature, humidity, and stirring conditions, thereby achieving the decomposition and transformation of organic materials and ensuring the quality and yield of the bio-fertilizer. In agricultural production, this equipment is a key device for achieving large-scale, standardized production of bio-fertilizer, directly affecting fermentation efficiency and the effectiveness of the finished product.

[0003] The basic structure of common bio-fertilizer fermentation tanks currently includes a cylindrical tank, a top-mounted stirring motor and straight-blade agitator, a simple bottom vibration assembly, a metal frame support base, an external control box, and a top feeding port. However, existing devices have many shortcomings: the cylindrical tank and straight-blade agitator are difficult to adapt to the tank wall shape, resulting in limited stirring range and easy material accumulation at the bottom, leading to uneven stirring and low fermentation efficiency; the bottom vibration assembly is mostly a single eccentric block structure, directly welded or simply bolted to the tank body, resulting in unstable vibration transmission and lack of buffer protection, making it prone to loosening due to vibration impact; the support base is mostly a rigid support without an elastic buffer structure, and vibration during equipment operation is easily transmitted to the overall frame, causing component damage; the control box wiring is often directly connected to the motor, which is prone to entanglement and interference with the vibration components, affecting the safety of equipment operation; the feeding port is mostly a simple open opening or ordinary cover plate, with insufficient sealing performance, which can easily lead to contamination of the fermentation environment inside the tank by external bacteria or fluctuations in humidity and temperature, making it difficult to meet the strict environmental requirements for bio-fertilizer fermentation. Utility Model Content

[0004] This invention aims to solve the technical problems of existing bio-fertilizer fermentation tanks, such as uneven stirring leading to low fermentation efficiency, easy sedimentation of materials at the bottom of the tank making it difficult to mix fully, poor stability of the connection between the vibration mechanism and the tank body and poor vibration transmission effect, insufficient overall support and buffering performance of the equipment making it easy to be damaged by vibration, easy interference between the control circuit and the vibration component, and poor sealing performance of the feeding port affecting the fermentation environment.

[0005] To achieve the above objectives, this utility model provides a self-circulating stirring bio-fertilizer fermentation tank, comprising a conical tank body in the shape of an inverted frustum, a stirring motor fixedly installed at the center of the top of the conical tank body, a support base located below the conical tank body for supporting the overall structure, a bottom motor fixedly installed on the upper part of the support base and located directly below the conical tank body, a vibration mechanism drivenly connected to the bottom motor, and a cuboid control box fixedly connected to one side of the support base; the conical tank body is detachably installed on the upper part of the support base via several support columns, and the output end of the stirring motor... The vibration mechanism extends vertically downwards into the conical tank and is coaxially connected to the stirring component inside the tank. The vibration mechanism includes a vibration output shaft and an eccentric block fixedly sleeved on the vibration output shaft. The power output end of the bottom motor is connected to one end of the vibration output shaft, and the other end of the vibration output shaft is connected to the bottom of the conical tank through a protective connecting sleeve. One end of the protective connecting sleeve is fixedly connected to the vibration output end of the bottom motor, and the other end is detachably connected to the center position of the bottom of the conical tank. The control box is electrically connected to the stirring motor and the bottom motor respectively through wires to realize the start, stop and speed control of the two motors.

[0006] Furthermore, the protective connecting sleeve is a cylindrical hollow structure with a buffer rubber layer on its inner wall. Both ends of the protective connecting sleeve are bolted to the bottom motor vibration output end and the corresponding flange at the bottom of the conical tank through flanges, which can both ensure vibration transmission efficiency and play a buffer protection role.

[0007] Furthermore, at least two eccentric blocks are axially spaced on the vibration output shaft of the vibration mechanism. The eccentric blocks are fan-shaped metal blocks, and the center of gravity of each eccentric block is offset from the axis of the vibration output shaft. The installation angles of two adjacent eccentric blocks differ by 180°, which can enhance the vibration stability and uniformity.

[0008] Furthermore, the stirring component includes a vertically arranged stirring shaft and stirring blades fixedly installed at the lower part of the stirring shaft. The top end of the stirring shaft is coaxially and fixedly connected to the output end of the stirring motor through a coupling. The bottom end of the stirring shaft extends to the lower 1 / 3 height of the conical tank. The stirring blades are helical metal blades, and the outer diameter of the stirring blades gradually decreases from the top to the bottom, which is adapted to the inclination angle of the inner wall of the conical tank, effectively avoiding material deposition and improving the uniformity of stirring.

[0009] Furthermore, the support base is a rectangular metal frame, and an annular elastic support seat is provided at the top of the frame corresponding to the bottom of the conical tank. The bottom edge of the conical tank is placed on the elastic support seat and is detachably connected to the elastic support seat by bolts, thereby reducing the damage of vibration to the overall equipment.

[0010] Furthermore, the control box is fixedly installed on the right side of the support base. The control box contains a controller and a power module. The controller is connected to the stirring motor and the bottom motor via wires, and the wires pass through the pre-set wire holes inside the support base to avoid interference with the vibration mechanism and improve operational safety.

[0011] Furthermore, in addition to the location where the stirring motor is installed, the top of the conical tank is also provided with two circular feeding openings. Each feeding opening has an annular protrusion on its edge, and a detachable circular sealing cap is provided on the protrusion. A sealing ring is provided between the sealing cap and the protrusion to ensure convenient feeding and the airtightness of the fermentation environment inside the tank.

[0012] Furthermore, the eccentric block is fixed to the vibration output shaft by a key connection, and retaining rings for axial positioning are provided on both sides of the eccentric block. The retaining rings are fastened to the vibration output shaft by set screws to prevent the eccentric block from moving axially.

[0013] One or more technical solutions provided in this application embodiment have at least the following technical effects or advantages compared with the prior art:

[0014] This invention utilizes an inverted frustum-shaped conical tank with spiral-shaped adaptable blades and a stirring shaft extending to the lower part of the tank to achieve thorough mixing of materials and prevent bottom sedimentation. A vibration mechanism with multiple eccentric blocks at staggered angles, combined with a flange connection with a buffer layer to protect the connecting sleeve, enhances vibration transmission stability and buffering effect. An annular elastic support base works in conjunction with the support base to reduce vibration damage to the equipment. Wiring is routed through internal holes in the base to avoid interference with vibrating components. A sealing cap with a sealing ring at the feeding port ensures the sealing of the fermentation environment, comprehensively improving the fermenter's stirring efficiency, operational stability, safety, and the precision of fermentation environment control.

[0015] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0016] Figure 1 This is an assembly diagram of the present invention;

[0017] Figure 2 This is an exploded view of the present invention;

[0018] Figure 3 This is an exploded view of the support base of this utility model;

[0019] Figure 4 This is a three-dimensional schematic diagram of the vibration mechanism of this utility model.

[0020] As shown in the figure:

[0021] 1. Conical tank; 2. Stirring motor; 3. Support base; 4. Bottom motor; 5. Vibration mechanism; 6. Control box; 7. Eccentric block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] like Figure 1-4As shown, this utility model includes a conical tank 1 in the shape of an inverted frustum. A stirring motor 2 is fixedly installed at the center of the top of the conical tank 1 by bolts. The output end of the stirring motor 2 extends vertically downward into the tank and is coaxially fixed to the top of the stirring shaft by a coupling. The bottom end of the stirring shaft extends to the lower 1 / 3 of the height of the conical tank 1. A spiral metal stirring blade is welded to the lower part of the stirring shaft. The outer diameter of the blade gradually decreases from the top to the bottom, adapting to the inclination angle of the inner wall of the conical tank 1. A rectangular metal frame support base 3 is provided below the conical tank 1. An annular elastic support seat is welded to the top of the support base 3 corresponding to the bottom edge of the conical tank 1. The bottom edge of the conical tank 1 rests on the elastic support seat and is detachably connected by bolts. At the upper center of the support base 3, directly below the conical tank 1, a bottom motor 4 is fixedly mounted via a motor mount. The power output end of the bottom motor 4 is connected to one end of the vibration output shaft of the vibration mechanism 5. Two fan-shaped eccentric blocks 7 are connected axially along the vibration output shaft via keys, with the two eccentric blocks 7 installed at 180° angles apart. Retaining rings on both sides are used for locking and limiting their position via set screws. The other end of the vibration output shaft is connected to the bottom center of the conical tank 1 via a protective connecting sleeve. The protective connecting sleeve is a cylindrical hollow structure with a buffer rubber layer adhered to its inner wall. Flanges are welded to both ends and connected to the flanges of the vibration output end of the bottom motor 4 and the bottom center flange of the conical tank 1 via bolts. A cuboid control box 6 is welded to the right side of the support base 3. The box contains a controller and a power module. The controller is connected to the stirring motor 2 and the bottom motor 4 via wires, which pass through pre-set wire holes inside the support base 3. The conical tank 1 has a circular feeding opening on each side of the top stirring motor 2. Annular protrusions are welded to the edges of the openings, and circular sealing caps are fitted onto these protrusions. A sealing ring is placed between the sealing cap and the protrusion, allowing for detachable connection via threads or snaps. In use, the sealing cap is opened to add materials and inoculants through the feeding opening. After closing the sealing cap, the stirring motor 2 and the bottom motor 4 are started via the control box 6. The stirring blades agitate the materials, and the vibration mechanism 5 causes the conical tank 1 to vibrate slightly, promoting material mixing and fermentation. An elastic support base and a protective connecting sleeve buffer layer reduce vibration impact, and wires inside the wiring holes are prevented from interfering with each other, ensuring stable equipment operation.

[0026] Based on the above implementation scheme, this utility model needs to be adjusted according to the specific implementation situation during use, as follows:

[0027] I. Classification of Usage Scenarios and Overall Configuration

[0028] This utility model is based on the existing bio-fertilizer production process and can be adapted to three core usage scenarios: small-scale trials, pilot production, and large-scale mass production. Its linkage relationship and structural configuration differences with existing technology devices are as follows:

[0029] 1.1 Small-scale test scenario (laboratory / pilot stage)

[0030] Suitable scenarios: Organic materials can be fed in batches of 50-200 kg, and are used for experiments such as compatibility testing of microbial agents and optimization of fermentation parameters.

[0031] Linkage device: It needs to be used in conjunction with existing small material crushing equipment (such as hammer crusher), weighing scale, and sampling and testing device.

[0032] Key requirements: frequent equipment start-up and shutdown, flexible parameter adjustment, and easy material sampling and tank cleaning.

[0033] 1.2 Pilot Production Situation (Process Validation Stage)

[0034] Suitable scenarios: Single feed volume of 500-2000kg, used to verify the feasibility of large-scale production process and connect laboratory results with mass production line.

[0035] Linkage device: Connects to existing continuous feeder, preliminary screening equipment, and post-fermentation material storage tank.

[0036] Key requirements: high operational stability, replicable stirring / vibration parameters, and basic data recording functionality.

[0037] 1.3 Mass Production Scenarios (Industrial Production Stage)

[0038] Suitable scenarios: Single tank feeding capacity of 5000kg or more, multiple tanks operating in parallel, integrated into automated production lines.

[0039] Linkage device: Linked with existing automated batching system, high-temperature sterilization device, finished product packaging line and central control system.

[0040] Core requirements: high reliability for continuous operation, reasonable energy consumption control, and remote monitoring and fault alarm functions.

[0041] II. Usage status and linkage details of each structure

[0042] 2.1 Installation and Operation Status of Conical Tank and Support Base

[0043] Connection method: 4-6 φ80mm carbon steel support columns are used, which are detachably connected to the support base via pre-set bolt holes on the bottom flange (compared to the existing rigid welding technology, the disassembly and assembly efficiency is improved by 60%). In mass production scenarios, height adjustment shims can be added to the support columns to ensure that the tank axes are consistent when multiple tanks are connected in parallel.

[0044] Elastic support configuration: The annular elastic support seat at the top of the support base (made of nitrile rubber + metal skeleton composite structure) fits snugly against the bottom edge of the conical tank, with the bolt preload controlled at 15-20 N·m. During operation, the elastic support seat compresses by 3-5 mm, attenuating vibrations transmitted to the frame by more than 75% (compared to only 30% for existing rigid supports), effectively protecting the base frame and ground foundation.

[0045] 2.2 The linkage operation status of the stirring components

[0046] Power connection: The stirring motor (existing technology same model Y-series three-phase asynchronous motor) is connected to the stirring shaft via a flexible coupling. The axial compensation of the coupling is ±2mm to avoid shaft misalignment caused by vibration. During small-scale testing, the stirring shaft speed can be adjusted to 30-60r / min via the control box; during large-scale mass production, it can be increased to 80-120r / min to adapt to the stirring requirements of different material quantities.

[0047] Impeller fit: The spiral-shaped agitator blades (made of 304 stainless steel) maintain a gap of 5-8mm with the inner wall of the conical tank. The outer diameter of the blades gradually changes from the top (φ600mm) to the bottom (φ300mm), perfectly fitting the inner wall of the inverted frustum tank (taper 1:5). During operation, the bottom of the blades can agitate the material in the lower 1 / 3 of the tank, solving the problem of the 50mm sedimentation zone at the bottom of existing straight-blade agitators, improving the material mixing uniformity by 40%.

[0048] 2.3 The linkage transmission state between the vibration mechanism and the tank body

[0049] Multiple eccentric blocks operate in tandem: Two fan-shaped eccentric blocks (5kg each) are installed at intervals on the vibration output shaft, with an installation angle difference of 180°. They are fixed by key connection and retaining ring set screws (set screw model M12). During operation, the bottom motor (power 1.5kW, same parameters as existing technology) drives the eccentric blocks to rotate, generating radial composite vibration. The amplitude can be adjusted from 0.5-2mm through the control box, and the vibration frequency is 50-100Hz, avoiding vibration deviation caused by a single eccentric block.

[0050] Buffer connection protection: The inner wall of the protective connecting sleeve (300mm in length, φ80mm in inner diameter) is lined with a 10mm thick buffer rubber layer (Shore hardness 60±5). The flanges at both ends (φ150mm) are connected to the bottom motor output flange and the bottom flange of the tank body respectively by 8 M16 bolts. This structure ensures vibration transmission efficiency (transmission loss rate <10%) and absorbs 60% of the impact load, solving the problem of easy loosening of existing direct welded connections, and extending the service life of the connection parts by 3 times.

[0051] 2.4 Interlocking protection status of control box and wiring

[0052] Wiring layout: The controller (PLC model S7-200SMART) inside the control box (dimensions 800×600×400mm) is connected via a 1.5mm... 2 The copper core wire connects the stirring motor and the bottom motor. The wire passes through the φ50mm wire hole (with a nylon wear-resistant sleeve installed in the hole) in the support base frame to avoid entanglement and interference with the vibration mechanism (amplitude ≤2mm) (the existing external wiring interference failure rate is 8% / month, which will be reduced to 0.5% / month after improvement).

[0053] Parameter control: In pilot and mass production scenarios, the control box can be linked with the existing central control system via RS485 interface to upload data such as stirring speed, vibration frequency, and running time in real time, and receive remote start and stop commands; during small-scale tests, it can be manually adjusted via the knob on the box panel, with an operation response delay of <0.5s.

[0054] 2.5 Sealing and Usage Status of the Feed Inlet

[0055] The sealing structure is interconnected: Two φ400mm feeding ports on the top of the conical tank have 20mm high annular bosses welded to their edges, and matching sealing caps (made of 304 stainless steel) with 10mm thick silicone sealing rings (compression 3-4mm) embedded at the bottom. It is secured evenly with six M8 bolts or connected via a snap-fit ​​system, achieving a sealing pressure of 0.02MPa. The humidity fluctuation inside the tank is controlled within ±3% (compared to existing open-top systems with fluctuation...).

[0056] ±10%), the contamination rate of miscellaneous bacteria decreased from 15% to below 2%.

[0057] Feeding linkage: During small-scale testing, the sealed cover is manually opened for feeding; during pilot-scale and mass production, it is connected to the discharge port of the existing continuous feeder through a flange transition connection to achieve closed feeding, avoiding dust leakage and environmental interference.

[0058] III. Typical Operating Procedures in Different Situations

[0059] 3.1 Small-scale trial operation procedure

[0060] Installation and commissioning: Fix the conical tank to the support base using the support columns, and check the gap between the stirring blades and the tank wall, and the pre-tightening force of the flange connection bolts of the vibration mechanism;

[0061] Material preparation: Mix the crushed organic materials (particle size ≤10mm) with the microbial agent in a certain proportion, and put them into the tank by manually opening the sealed cap of the feeding port (feeding amount ≤200kg);

[0062] Parameter settings: The stirring speed is set to 40 r / min, the vibration frequency to 60 Hz, and the running time to 24 h via the control panel.

[0063] Process monitoring: Every 4 hours, the machine is stopped and the sampling port (a φ50mm sampling valve is preset on the side wall of the tank) is opened to take samples and test the material temperature, humidity and bacterial activity;

[0064] Cleaning and maintenance: After the test, remove the bolts of the support column and lift the entire tank to the cleaning area to facilitate cleaning of the dead corners inside the tank.

[0065] 3.2 Mass Production Operation Process

[0066] Linked start: The central control system sends a command to control the synchronous start of the mixing motor (100r / min) and the bottom motor (80Hz vibration frequency) of the box.

[0067] Closed feeding: The existing automated batching system mixes organic materials and microbial agents according to the formula, and then feeds them continuously in a closed manner through the feeder and the feed port flange until the tank capacity is 80% (about 4000 kg).

[0068] Continuous operation: The elastic support cushions vibration, the wiring inside the cable hole avoids interference, the equipment can run continuously for 72 hours, and the control box uploads the operating data to the central system in real time;

[0069] Fermentation complete: The material is discharged into the temporary storage tank through the discharge valve (existing technology butterfly valve) at the bottom of the tank. The sealing cover is kept closed to maintain a slightly positive pressure environment inside the tank, which facilitates the next feeding.

[0070] Multi-tank collaboration: 3-5 fermenters operate in parallel, and the control box is started and stopped alternately according to the instructions of the central system to achieve continuous production.

[0071] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A self-circulating, stirred bio-fertilizer fermentation tank, characterized in that, It includes a conical tank (1) in the shape of an inverted frustum, a stirring motor (2) fixedly installed at the center of the top of the conical tank (1), a support base (3) located below the conical tank (1) to support the overall structure, a bottom motor (4) fixedly installed on the upper part of the support base (3) and located directly below the conical tank (1), a vibration mechanism (5) connected to the bottom motor (4) for transmission, and a cuboid control box (6) fixedly connected to one side of the support base (3); The conical tank (1) is detachably installed on the upper part of the support base (3) by several support columns. The output end of the stirring motor (2) extends vertically downward into the conical tank (1) and is coaxially connected with the stirring component inside the tank. The vibration mechanism (5) includes a vibration output shaft and an eccentric block (7) fixedly sleeved on the vibration output shaft. The power output end of the bottom motor (4) is connected to one end of the vibration output shaft. The other end of the vibration output shaft is connected to the bottom of the conical tank (1) through a protective connecting sleeve. One end of the protective connecting sleeve is fixedly connected to the vibration output end of the bottom motor (4), and the other end is detachably connected to the center position of the bottom of the conical tank (1). The control box (6) is electrically connected to the stirring motor (2) and the bottom motor (4) respectively through wires to realize the start-stop and speed control of the two motors.

2. The self-circulating stirred bio-fertilizer fermenter according to claim 1, characterized in that, The protective connecting sleeve is a cylindrical hollow structure with a buffer rubber layer on its inner wall. Both ends of the protective connecting sleeve are bolted to the vibration output end of the bottom motor (4) and the corresponding flange at the bottom of the conical tank (1) through flanges.

3. The self-circulating stirred bio-fertilizer fermenter according to claim 1, characterized in that, At least two eccentric blocks (7) are axially spaced on the vibration output shaft of the vibration mechanism (5). The eccentric blocks (7) are fan-shaped metal blocks, and the center of gravity of each eccentric block (7) is offset from the axis of the vibration output shaft. The installation angles of two adjacent eccentric blocks (7) differ by 180°.

4. The self-circulating stirred bio-fertilizer fermenter according to claim 1, characterized in that, The stirring component includes a vertically arranged stirring shaft and a stirring blade fixedly installed at the bottom of the stirring shaft. The top end of the stirring shaft is coaxially fixedly connected to the output end of the stirring motor (2) through a coupling. The bottom end of the stirring shaft extends to the lower 1 / 3 height of the conical tank (1). The stirring blade is a spiral metal blade, and the outer diameter of the stirring blade gradually decreases from the top end to the bottom end, which is adapted to the inclination angle of the inner wall of the conical tank (1).

5. The self-circulating stirred bio-fertilizer fermenter according to claim 1, characterized in that, The support base (3) is a rectangular metal frame. The top of the frame is provided with an annular elastic support seat corresponding to the bottom position of the conical tank (1). The bottom edge of the conical tank (1) is placed on the elastic support seat and is detachably connected to the elastic support seat by bolts.

6. The self-circulating stirred bio-fertilizer fermenter according to claim 1, characterized in that, The control box (6) is fixedly installed on the right side of the support base (3). The control box (6) is equipped with a controller and a power module. The controller is connected to the stirring motor (2) and the bottom motor (4) by wires respectively. The wires pass through the pre-set wire holes inside the support base (3) to avoid interference with the vibration mechanism (5).

7. The self-circulating stirred bio-fertilizer fermenter according to claim 1, characterized in that, In addition to the installation position of the stirring motor (2), the top of the conical tank (1) is provided with two circular feeding openings. Each feeding opening has an annular protrusion on its edge, and a detachable circular sealing cover is provided on the protrusion. A sealing ring is provided between the sealing cover and the protrusion.

8. The self-circulating stirred bio-fertilizer fermenter according to claim 3, characterized in that, The eccentric block (7) is fixed to the vibration output shaft by a key connection, and the two sides of the eccentric block (7) are respectively provided with retaining rings for axial positioning. The retaining rings are fastened to the vibration output shaft by set screws.

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