A multi-stage shearing and scattering mixing device for long straw and high-moisture distiller's grains

Abstract

This invention discloses a multi-stage shearing and mixing device for long straw and high-moisture distiller's grains, belonging to the field of agricultural waste resource utilization and feed processing technology. The device includes an outer shell and a top cover. The outer shell contains a cutting chamber, within which two sets of counter-rotating multi-layered blades are mounted via a central rod and a sleeve. Symmetrically arranged pads are located on the upper and lower sides of the blades, forming a multi-stage shearing structure. The inner wall of the outer shell has liquid holes with filters and internal perforations, allowing for the simultaneous removal of excess moisture from the high-moisture distiller's grains during the shearing process. This invention also provides a corresponding control method, achieving continuous and automated processing of long straw and high-moisture distiller's grains through parameter presetting, counter-synchronous shearing, automatic dehydration, pneumatic mixing, and self-cleaning. This invention solves the problems of low shearing efficiency of long straw, easy clumping of high-moisture distiller's grains, uneven mixing, and high energy consumption caused by stepwise dehydration and mixing in existing technologies.

Description

Technical Field

[0001] This invention belongs to the field of agricultural waste resource utilization and feed processing technology, specifically involving a multi-stage shearing, dispersing and mixing device for long straw and high-moisture distiller's grains. Background Technology

[0002] With the rapid development of my country's animal husbandry and brewing industries, the amount of agricultural waste and industrial by-products generated has been increasing year by year. Crop straw is the largest agricultural waste in my country, with an annual output of over 900 million tons, most of which is directly burned or discarded at will, causing not only a huge waste of resources but also serious environmental pollution. Baijiu (Chinese liquor) lees are a major by-product of the brewing industry, with an annual output of over 30 million tons. They have a high moisture content and are rich in protein, amino acids, and vitamins, making them a high-quality feed ingredient.

[0003] Mixing long straw with high-moisture distiller's grains to produce fermented feed is an effective way to utilize both resources. However, existing technologies for processing long straw and high-moisture distiller's grains have the following problems: Long straw fibers are tough and tough. Existing shearing devices mostly use single-axis rotary shearing, which has low shearing efficiency and is prone to straw entanglement with the blade, resulting in a high equipment failure rate. High-moisture distiller's grains are highly viscous and prone to clumping. Existing mixing devices are unable to fully and evenly mix straw fragments with distiller's grains, resulting in poor mixing uniformity and affecting subsequent fermentation effects. Dehydration and mixing are mostly carried out in steps, requiring the transfer of materials between different devices, which not only increases energy consumption and labor costs, but also extends the processing cycle. The low level of automation requires real-time manual monitoring and operation, making it difficult to meet the needs of large-scale production.

[0004] Therefore, there is an urgent need to develop an integrated device that can simultaneously achieve multi-stage shearing of long straw, dispersing of high-moisture distiller's grains, synchronous dehydration, and enhanced mixing, in order to solve the aforementioned problems in the existing technology. Summary of the Invention

[0005] In view of this, the purpose of one or more embodiments of this specification is to provide a solution to the problems in the prior art, such as low efficiency in cutting long straw, easy entanglement of blades, easy clumping of high-moisture distiller's grains, uneven mixing, high energy consumption, long processing cycle, and low degree of automation caused by step-by-step dehydration and mixing.

[0006] Based on the above objectives, one or more embodiments of this specification provide a multi-stage shearing and dispersing mixing device for long straw and high-moisture distiller's grains, including a shell and a top cover. A cylindrical cutting cavity is formed inside the shell, and discharge ports are symmetrically arranged on both sides of the lower outer periphery of the shell for discharging the mixed material. Two central rods are symmetrically fixedly installed at a raised platform in the center of the cutting cavity. Each central rod is fitted with a freely rotatable sleeve, and multiple layers of blades are fixedly installed around the sleeve. Two sets of symmetrically arranged pads are fixedly installed in the cutting cavities on the upper and lower sides of the blades. The adjacent ends of the two sets of pads together form a material discharge cavity, and a gap is left between the pads and the sleeve to avoid affecting the rotation and cutting of the blades.

[0007] The top cover is fastened to the top of the outer shell. A feed inlet is located at the center of the top cover surface, corresponding to the material drop chamber. Material can fall directly into the shearing area between the two sets of blades through the feed inlet. Drive motors are symmetrically fixedly installed on the upper surface of the top cover on both sides of the feed inlet. The output end of the drive motor passes through the top cover downward and is fixedly installed with an interface. The interface is spliced ​​with the top of the sleeve, which can drive the sleeve and blades to rotate synchronously under the drive of the drive motor.

[0008] The outer shell below the sleeve has an inner cavity, and drain outlets are symmetrically arranged at the bottom of the center line on the front and back of the outer shell. The inner wall of the outer shell also has a vertical inner hole that extends downward into the inner cavity. Multiple liquid holes are opened on the side of the inner hole facing the cutting cavity. The inner wall of the liquid holes is equipped with a filter screen, which can filter and absorb excess water from the high-humidity lees during the shearing process. The water eventually collects in the inner cavity and is discharged through the drain outlet.

[0009] Furthermore, adjacent blades on the same sleeve are arranged at 2-centimeter arc intervals, and the upper and lower blades are staggered by 10°-15°; the blades on the two sleeves are staggered in the axial direction, forming a shearing surface with a shearing gap of 0.5-1mm. This arrangement can realize multi-stage continuous shearing of materials, avoid material leakage, and improve shearing efficiency and shearing uniformity.

[0010] Furthermore, the blade is made of 65Mn spring steel, with a surface hardened to a hardness of HRC55-60, providing excellent wear resistance and impact resistance. The blade's cutting edge is curved, with an angle of 25°-30°, which effectively reduces shearing resistance and minimizes straw entanglement on the blade.

[0011] Furthermore, the backing plate has a fan-shaped structure, with each set of backing plates consisting of multiple stacked stainless steel plates. The spacing between adjacent stainless steel plates matches the thickness of the blade, allowing the blade to rotate freely within the gaps between adjacent stainless steel plates. The backing plate not only supports the material but also works in conjunction with the blade to form a shearing surface, improving the shearing effect.

[0012] Furthermore, there are multiple inner holes, evenly distributed circumferentially along the inner wall of the outer shell; each inner hole has multiple liquid holes arranged in a matrix. The filter screen is made of stainless steel and is fixed to the inner wall of the liquid holes by clips, which can effectively filter solid particles in the lees and prevent the liquid holes from clogging.

[0013] Furthermore, air chambers are symmetrically arranged on both sides of the inner cavity, and an air pump is fixedly installed at the top of each air chamber. A through-hole, communicating with the cutting cavity, is opened on the side of the air chamber facing the cutting cavity, and an elastic airbag is sealed at the through-hole. The air pump fills or extracts compressed air into the air chamber, causing the airbag to periodically expand and contract, pushing the material to form turbulence at the bottom of the cutting cavity, thus achieving uniform mixing of straw fragments and distiller's grains.

[0014] Furthermore, the airbag is made of food-grade silicone rubber, which has good elasticity and corrosion resistance, and its maximum expansion capacity is 80% of the air chamber volume. The surface of the airbag has anti-slip texture, which can increase the friction with the material and improve the mixing effect.

[0015] Furthermore, the interface is a spline interface, and the top of the sleeve has a spline groove that matches the spline interface, ensuring a firm connection and high transmission efficiency. The drive motor is a variable frequency speed control motor with a speed adjustment range of 300-1800 r / min, which can adjust the speed according to different material characteristics to adapt to different processing needs.

[0016] Furthermore, a liquid level sensor is installed inside the cavity, and solenoid valves are installed at both the drain outlet and the discharge outlet; a speed sensor and a current sensor are installed at the output end of the drive motor. These various sensors allow for real-time monitoring of the device's operating status, enabling automated control.

[0017] This invention also provides a control method for the above-mentioned multi-stage shearing and dispersing mixing device for long straw and high-moisture distiller's grains, comprising the following steps: S1 System initialization and parameter preset: After the device is powered on, a system self-check is performed to confirm that the drive motor, air pump, liquid level sensor, solenoid valve, and each sensor are working normally. Operating parameters are preset according to the characteristics of the material to be processed: when the original length of the long straw is >30cm, the drive motor speed is set to 1200-1500 r / min; when the straw length is ≤30cm, the speed is set to 800-1200 r / min. When the moisture content of the high-moisture distiller's grains is >65%, the preset dehydration time is 15-20 min; when the moisture content is 50%-65%, the dehydration time is set to 8-15 min. The preset working cycle of the air pump is: expansion 2s, contraction 3s, with 5-8 cycles.

[0018] S2 Pretreatment and Uniform Feeding: Long straw is pre-cut to less than 50cm to remove stones, metal, and other impurities to avoid damaging the blades. After initial premixing at a ratio of 1:(2-4) between long straw and high-moisture distiller's grains, it is fed into the device at a uniform speed through the inlet. During feeding, the operating current of the drive motor is monitored in real time. When the current exceeds 120% of the rated current, the feeding speed is automatically reduced by 50%, and gradually restored to the original feeding speed after the current returns to the rated range. When the current exceeds 150% of the rated current and remains there for more than 5 seconds, feeding is automatically stopped and an alarm signal is issued, prompting the operator to check for blockage.

[0019] S3 Reverse Synchronous Multi-Stage Shearing: Two drive motors are activated, controlling them to rotate in opposite directions at the same speed. This drives two sets of sleeves and blades to rotate in opposite directions via an interface. The material forms shear convection between the two sets of counter-rotating blades. The upper blades first initially cut long straw into 5-10cm pieces. Under gravity, the material falls to the lower blade area, where it is further finely sheared into uniform 1-3cm pieces. Simultaneously, clumps in the distiller's grains are broken up, achieving simultaneous shearing and breaking up. The shearing process continues until the preset dewatering time ends.

[0020] S4 Automatic Synchronous Dehydration: During the shearing process, excess water in the high-humidity distiller's grains is drawn into the inner cavity through the liquid holes under the action of centrifugal force and gravity, eventually collecting in the inner chamber. When the liquid level sensor in the inner chamber detects that the water level has reached the preset high threshold, the solenoid valve at the drain outlet is automatically opened to drain the water; when the water level drops to the low threshold, the solenoid valve is automatically closed, realizing automated control of the dehydration process.

[0021] S5 Pneumatic Enhanced Mixing: After shearing and dehydration, the drive motor is turned off, and the air pump is started. The air pump fills and extracts compressed air into the air chamber according to a preset cycle, causing the air bladder to expand and contract periodically. The reciprocating motion of the air bladder pushes the cut material to form strong turbulence at the bottom of the cutting chamber, so that the straw fragments and lees are thoroughly and evenly mixed, while shaking off the material adhering to the chamber wall and blades. This process continues until the preset number of cycles is completed.

[0022] S6 Discharge and System Self-Cleaning: After mixing is complete, simultaneously open the discharge ports on both sides of the outer casing to discharge the mixed material. After discharge, close the discharge ports, inject an appropriate amount of clean water through the inlet, and start the drive motor to rotate at a low speed of 300r / min for 30 seconds to self-clean the inside of the cutting chamber, the blade, and the pad. After cleaning, open the drain port to discharge the wastewater, turn off all equipment, and reset the system to standby mode.

[0023] As can be seen from the above, the multi-stage shearing and mixing device for long straw and high-moisture distiller's grains provided in one or more embodiments of this specification has the following effects: High shearing efficiency and good anti-tangling effect: It adopts a multi-layer blade structure with two sets of counter-rotating blades to form a multi-level continuous shearing surface, which improves the shearing efficiency by more than 40% compared with single-axis shearing devices; the blade adopts an arc-shaped cutting edge design, which effectively reduces shearing resistance and reduces the phenomenon of straw tangling around the blade, reducing the equipment failure rate by more than 60%.

[0024] High mixing uniformity: Through the periodic expansion and contraction of the pneumatic airbag, the material is driven to form strong turbulence, which realizes the full mixing of straw fragments and distiller's grains. The coefficient of variation of mixing uniformity is ≤5%, which is far superior to existing mixing devices.

[0025] Simultaneous dehydration with low energy consumption: During the shearing process, excess water in the high-moisture distiller's grains is removed simultaneously through the liquid pores with a filter screen, eliminating the need for separate dehydration equipment, reducing material transfer links, reducing energy consumption by more than 30%, and shortening the processing cycle by more than 50%.

[0026] High degree of automation: The device's operating status is monitored in real time by various sensors, which realizes automatic adjustment of feeding speed, automatic control of dewatering, automatic mixing and system self-cleaning, which greatly reduces labor costs and is suitable for large-scale production.

[0027] Compact structure and easy maintenance: The device adopts an integrated design, which is compact and occupies a small area; the top cover and the outer shell are detachably connected, and the blades and filter screen can be easily removed and replaced, resulting in low maintenance costs. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in one or more embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one or more embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 This is a cross-sectional view of the internal structure of Embodiment 2 of the present invention; Figure 3 This is a schematic diagram of the structure from another angle of Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the blade structure in this invention; Figure 5 This is a schematic diagram of the stacking structure of the pads in this invention.

[0030] In the diagram: 1. Outer shell; 11. Outlet; 12. Drain; 13. Sleeve; 14. Inner hole; 15. Center rod; 16. Liquid hole; 2. Top cover; 21. Drive motor; 22. Inlet; 23. Interface; 3. Pad; 31. Blade; 32. Air chamber; 33. Air bladder; 34. Inner cavity; 35. Air pump. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments.

[0032] It should be noted that, unless otherwise defined, the technical or scientific terms used in one or more embodiments of this specification should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar words used in one or more embodiments of this specification do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly. Example 1:

[0033] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, this embodiment of the invention provides a multi-stage shearing and dispersing mixing device for long straw and high-moisture distiller's grains, including a shell 1 and a top cover 2. The shell 1 is welded from stainless steel plate and is cylindrical in shape. A cylindrical cutting cavity is provided inside the shell 1. Two rectangular discharge ports 11 are symmetrically arranged on the lower sides of the outer periphery of the shell 1 for discharging the mixed material.

[0034] Two center rods 15 are symmetrically fixed at the central platform inside the cutting cavity. The center rods 15 are made of steel and are bolted to the platform at the bottom of the cutting cavity. Each center rod 15 is fitted with a freely rotatable sleeve 13, which is made of seamless steel pipe. A bearing is provided between the sleeve 13 and the center rod 15 to ensure that the sleeve 13 can rotate flexibly.

[0035] Multiple layers of blades 31 are fixedly installed on the outer periphery of the sleeve 13, with multiple blades in each layer. Adjacent blades 31 on the same sleeve 13 are arranged at a 2 cm arc interval, and the upper and lower layers of blades 31 are staggered by 12°. The blades 31 on the two sleeves 13 are staggered in the axial direction, forming a shearing surface with a shearing gap of 0.8 mm. The blades 31 are made of 65Mn spring steel, with a surface quenching treatment and a hardness of HRC58, exhibiting good wear resistance and impact resistance. The cutting edge of the blades 31 is arc-shaped with a cutting edge angle of 28°, which can effectively reduce shearing resistance and reduce the phenomenon of straw entanglement on the blades.

[0036] Two sets of symmetrically arranged pads 3 are fixedly installed in the cutting cavities on the upper and lower sides of the blade 31. The adjacent ends of the two sets of pads 3 together form a material discharge cavity, the size of which matches the size of the feed inlet 22. The pads 3 have a fan-shaped structure, and each set of pads 3 is composed of multiple stacked stainless steel plates. The spacing between adjacent stainless steel plates matches the thickness of the blade 31, allowing the blade 31 to rotate freely within the gaps between adjacent stainless steel plates. A gap is left between the pads 3 and the sleeve 13 to avoid affecting the rotational cutting of the blade 31.

[0037] The top cover 2 is made of stainless steel plate and is fastened to the top of the outer shell 1 by bolts. A rectangular inlet 22 is provided at the center of the upper surface of the top cover 2, corresponding to the material discharge chamber. Material can fall directly into the shearing area between the two sets of blades 31 through the inlet 22. Two drive motors 21, which are variable frequency speed control motors, are symmetrically fixedly installed on the upper surface of the top cover 2 on both sides of the inlet 22. The output end of the drive motor 21 penetrates downward through the top cover 2 and is fixedly installed with an interface 23, which is a spline interface. The top end of the sleeve 13 has a spline groove that matches the spline interface. The interface 23 and the top end of the sleeve 13 are spliced ​​together, allowing the sleeve 13 and the blades 31 to rotate synchronously under the drive of the drive motor 21.

[0038] The outer casing 1 below the sleeve 13 has an inner cavity 34 for collecting the removed water. Two drain ports 12 are symmetrically arranged at the bottom centerline of the front and back of the outer casing 1 to drain water accumulated in the inner cavity 34. Multiple vertical inner holes 14 are also formed on the inner wall of the outer casing 1, evenly distributed circumferentially along the inner wall, extending downwards into the inner cavity 34. Each inner hole 14 has multiple liquid holes 16 on the side facing the cutting cavity, arranged in a matrix. A stainless steel filter screen is installed on the inner wall of the liquid holes 16, fixed to the inner wall by clips, effectively filtering solid particles from the lees and preventing clogging of the liquid holes 16. Example 2:

[0039] like Figure 2As shown, based on Embodiment 1, this embodiment further optimizes the mixing effect. Two air chambers 32 are symmetrically arranged on both sides of the inner cavity 34, and the air chambers 32 are integrally formed with the outer shell 1. An air pump 35 is fixedly installed at the top of the air chamber 32. A through hole communicating with the cutting cavity is opened on the side of the air chamber 32 facing the cutting cavity, and an elastic airbag 33 is sealed and installed at the through hole.

[0040] The airbag 33 is made of food-grade silicone rubber, which has good elasticity and corrosion resistance, and its maximum expansion capacity is 80% of the volume of the air chamber 32. The edges of the airbag 33 are fixed to the perimeter of the through hole by pressure strips and bolts to ensure a good seal. The surface of the airbag 33 has a diamond-shaped anti-slip texture, which can increase the friction with the material and improve the mixing effect.

[0041] During operation, the air pump 35 fills the air chamber 32 with compressed air, causing the air bladder 33 to expand and push the material at the bottom of the cutting chamber to the other side. When the air pump 35 extracts the air from the air chamber 32, the air bladder 33 contracts, and the material flows back under the influence of gravity and inertia. This periodic expansion and contraction pushes the material to form strong turbulence at the bottom of the cutting chamber, which not only achieves uniform mixing of straw fragments and distiller's grains, but also effectively prevents the material from accumulating and clumping on the chamber walls and bottom, improving mixing efficiency and uniformity. Example 3:

[0042] This embodiment provides a control method for the above-mentioned multi-stage shearing and dispersing mixing device for long straw and high-moisture distiller's grains, specifically including the following steps: S1 System Initialization and Parameter Preset: After the device is powered on, the control system automatically performs a self-check, examining the working status of the drive motor 21, air pump 35, liquid level sensor, solenoid valve, speed sensor, and current sensor. If an abnormality is detected, an alarm signal is immediately issued and a fault code is displayed; if the self-check is normal, the system enters the parameter preset interface. The operator presets the operating parameters according to the characteristics of the material to be processed: The original length of the long straw to be processed is 40cm, and the moisture content of the high-moisture distiller's grains is 70%. Therefore, the speed of the drive motor 21 is set to 1400r / min, the dehydration time is set to 18min, the working cycle of the air pump 35 is set to expansion for 2s and contraction for 3s, and the number of cycles is set to 7.

[0043] S2 Pretreatment and Uniform Feeding: Long straw is pre-cut to below 50cm using a straw cutter to remove stones, metal, and other impurities. After preliminary premixing at a ratio of 1:3 (long straw to high-moisture distiller's grains by mass), the material is conveyed to feed inlet 22 via a belt conveyor and fed into the device at a set speed. During feeding, a current sensor monitors the operating current of drive motor 21 in real time. When the current exceeds 120% of the rated current, the control system automatically reduces the belt conveyor speed by 50%; when the current returns to below the rated current, the original feeding speed is gradually restored. When the current exceeds 150% of the rated current and remains above it for more than 5 seconds, the control system automatically stops the belt conveyor and drive motor 21 and issues an audible and visual alarm signal to prompt the operator to check for material blockage.

[0044] S3 Reverse Synchronous Multi-Stage Shearing: Two drive motors 21 are started, and the control system controls the two motors to rotate in opposite directions at a set speed. This drives the two sets of sleeves 13 and blades 31 to rotate in opposite directions via interface 23. Material falls from the feed inlet 22 into the shearing area between the two sets of blades 31, creating shear convection between the two sets of counter-rotating blades 31. The upper blade 31 first initially cuts the long straw into 5-10cm segments. Under gravity, the material falls into the area of ​​the lower blade 31, where it is further finely sheared into uniform 1-3cm segments, simultaneously breaking up clumps in the distiller's grains, achieving simultaneous shearing and breaking up. The shearing process continues until the preset dewatering time ends.

[0045] S4 Automatic Synchronous Dehydration: During the shearing process, excess water in the high-moisture distiller's grains is drawn into the inner cavity 14 through the liquid hole 16 under the action of centrifugal force and gravity, and finally collects in the inner cavity 34. A liquid level sensor in the inner cavity 34 monitors the water level changes in real time and presets high and low thresholds. When the water level reaches the high threshold, the control system automatically opens the solenoid valve of the drain outlet 12 to drain the water; when the water level drops to the low threshold, it automatically closes the solenoid valve, thus achieving automated control of the dehydration process.

[0046] S5 Pneumatic Enhanced Mixing: After shearing and dehydration are completed, the control system automatically shuts off the drive motor 21 and starts the air pump 35. The air pump 35 fills and extracts compressed air into the air chamber 32 according to a preset cycle, causing the air bag 33 to periodically expand and contract. The reciprocating motion of the air bag 33 pushes the cut material to form strong turbulence at the bottom of the cutting chamber, so that the straw fragments and the lees are thoroughly and evenly mixed, while shaking off the material adhering to the chamber wall and blades. This process continues until the preset number of cycles is completed.

[0047] S6 Discharge and System Self-Cleaning: After mixing is complete, the control system simultaneously opens the solenoid valves of the discharge ports 11 on both sides of the outer casing 1 to discharge the mixed material. The discharge process continues until the material is completely discharged. After discharge, the solenoid valves of the discharge ports 11 are closed, and an appropriate amount of clean water is injected through the inlet 22. The drive motor 21 is started and rotated at a low speed of 300 r / min for 30 seconds to self-clean the inside of the cutting chamber, the blade 31, and the pad 3. After cleaning, the solenoid valve of the drain port 12 is opened to discharge the wastewater, all equipment is shut down, and the system is reset to standby mode.

[0048] Testing showed that the proportion of straw with a length between 1-3cm in the material processed by the device and control method of this embodiment reached 96%, the coefficient of variation of mixing uniformity was 4.2%, and the moisture content was reduced to 45%, which fully meets the production requirements of subsequent fermented feed.

[0049] Although this disclosure has been described in conjunction with specific embodiments thereof, many substitutions, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description.

[0050] One or more embodiments of this specification are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments of this specification should be included within the scope of protection of this disclosure.

Claims

1. A multi-stage shearing and mixing device for long straw and high-moisture distiller's grains, characterized in that, It includes an outer shell (1) and a top cover (2); the outer shell (1) has a cylindrical cutting cavity inside, and the outer shell (1) has symmetrically arranged discharge ports (11) on both sides below the outer periphery. Two central rods (15) are symmetrically fixedly installed at the high platform in the middle of the cutting cavity. Each central rod (15) is fitted with a freely rotatable sleeve (13). Multiple blades (31) are fixedly installed on the outer periphery of the sleeve (13). Two sets of symmetrically arranged pads (3) are fixedly installed in the cutting cavity on the upper and lower sides of the blades (31). The two sets of pads (3) are connected at one end to form a material discharge cavity, and there is a gap between the pads (3) and the sleeve (13). The top cover (2) is fastened to the top of the outer shell (1). A feed inlet (22) is provided at the center of the upper surface of the top cover (2) corresponding to the position of the material drop chamber. A drive motor (21) is symmetrically fixedly installed on the upper surface of the top cover (2) on both sides of the feed inlet (22). The output end of the drive motor (21) passes through the top cover (2) downward and is fixedly installed with an interface (23). The interface (23) is spliced ​​with the top of the sleeve (13). Under the drive of the drive motor (21), the sleeve (13) and the blade (31) can be driven to rotate synchronously. An inner cavity (34) is provided in the outer shell (1) below the sleeve (13). Drainage outlets (12) are symmetrically provided at the bottom of the center line of the front and back of the outer shell (1). A vertical inner hole (14) is also provided on the inner wall of the outer shell (1). The inner hole (14) extends downward into the inner cavity (34). Multiple liquid holes (16) are provided on the side of the inner hole (14) facing the cutting chamber. A filter screen is provided on the inner wall of the liquid hole (16).

2. The multi-stage shearing and mixing device for long straw and high-moisture distiller's grains according to claim 1, characterized in that, The adjacent blades (31) on the same sleeve (13) are arranged with an arc interval of 2 cm, and the upper and lower blades (31) are staggered by 10°-15°; The blades (31) on the two sleeves (13) are staggered in the axial direction to form a shearing surface with a shearing gap of 0.5-1mm.

3. The multi-stage shearing and mixing device for long straw and high-moisture distiller's grains according to claim 1, characterized in that, The blade (31) is made of 65Mn spring steel and its surface is hardened to a hardness of HRC55-60. The cutting edge of the blade (31) is arc-shaped and the cutting edge angle is 25°-30°.

4. The multi-stage shearing and mixing device for long straw and high-moisture distiller's grains according to claim 1, characterized in that, The pad (3) has a fan-shaped structure. Each set of pads (3) is made of multiple stainless steel plates stacked together. The spacing between adjacent stainless steel plates matches the thickness of the blade (31). The blade (31) can rotate freely within the gap between adjacent stainless steel plates.

5. The multi-stage shearing and mixing device for long straw and high-moisture distiller's grains according to claim 1, characterized in that, The number of inner holes (14) is multiple, and they are evenly distributed along the inner wall of the outer shell (1); the number of liquid holes (16) on each inner hole (14) is multiple, and they are arranged in a matrix; The filter screen is a stainless steel filter screen, which is fixed to the inner wall of the liquid hole (16) by a buckle.

6. The multi-stage shearing and mixing device for long straw and high-moisture distiller's grains according to claim 1, characterized in that, The inner cavity (34) is symmetrically provided with air chambers (32) on both sides. An air pump (35) is fixedly installed at the top of the air chamber (32). The air chamber (32) has a through hole that communicates with the cutting cavity on the side facing the cutting cavity. An elastic air bag (33) is sealed and installed at the through hole.

7. The multi-stage shearing and mixing device for long straw and high-moisture distiller's grains according to claim 6, characterized in that, The airbag (33) is made of food-grade silicone rubber and its maximum expansion capacity is 80% of the volume of the air chamber (32). The surface of the airbag (33) is provided with anti-slip texture, which can increase the friction with the material.

8. The multi-stage shearing and mixing device for long straw and high-moisture distiller's grains according to claim 1, characterized in that, The interface (23) is a spline interface, and the top of the sleeve (13) is provided with a spline groove that matches the spline interface; the drive motor (21) is a variable frequency speed control motor with a speed adjustment range of 300-1800r / min.

9. The multi-stage shearing and mixing device for long straw and high-moisture distiller's grains according to claim 1, characterized in that, A liquid level sensor is installed in the inner cavity (34), and solenoid valves are installed at the drain outlet (12) and the discharge outlet (11); The output end of the drive motor (21) is equipped with a speed sensor and a current sensor.

10. A control method for a multi-stage shearing and mixing device for long straw and high-moisture distiller's grains as described in any one of claims 1-9, characterized in that, Includes the following steps: S1 System Initialization and Parameter Preset: After the device is powered on, a system self-test is performed to confirm that all components are working properly; the operating parameters are preset according to the characteristics of the material to be processed, including the drive motor speed, dehydration time, and air pump working cycle. S2 Pretreatment and Uniform Feeding: Long straw is pre-cut to a specified length and pre-mixed with high-moisture distiller's grains according to a preset mass ratio. Then, it is fed into the device at a uniform speed through the feed inlet. During the feeding process, the working current of the drive motor is monitored in real time, and the feeding speed is automatically adjusted according to the current change. S3 Reverse Synchronous Multi-Stage Shearing: Start two drive motors and control the two motors to rotate in opposite directions at the same speed, driving two sets of blades to rotate in opposite directions, performing multi-stage continuous shearing and dispersing of materials; S4 Automatic Synchronous Dehydration: During the shearing process, excess water in the high-humidity lees is collected into the inner cavity through the liquid holes and inner holes, and the opening and closing of the drain outlet is automatically controlled according to the liquid level in the inner cavity. S5 Pneumatic Enhanced Mixing: After shearing and dehydration are completed, the drive motor is turned off and the air pump is started, which drives the airbag to expand and contract periodically, pushing the material to form turbulence for thorough mixing; S6 Discharge and System Self-Cleaning: After mixing, open the discharge port to discharge the material. After discharge, inject clean water for self-cleaning. After cleaning, the system resets to standby mode.

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