A material crusher

Abstract

This utility model belongs to the technical field of crushing mechanisms, specifically disclosing a material crusher, including an upper frame, a lower frame, a working rotor, a feed inlet, an upper screen frame, a lower screen frame, and a drive unit. The upper and lower frames are closed to form a sealed space. The feed inlet is located on the upper frame. The upper and lower screen frames are respectively installed on the inner sides of the upper and lower frames, and upper and lower screens are respectively provided with upper and lower screens. The upper screen, lower screen, and upper frame form a crushing chamber, and the feed inlet communicates with the crushing chamber. A discharge outlet is provided on the lower frame. The working rotor is located in the crushing chamber, and its two ends are rotatably connected to the two ends of the lower frame. Multiple blades are connected to the circumferential surface of the working rotor. The drive unit can drive the working rotor to rotate. This utility model can perform secondary crushing of straw particles, making the straw particles smaller.

Description

Technical Field

[0001] This utility model relates to the field of crushing mechanism technology, specifically to a material crusher. Background Technology

[0002] Currently, crushers are commonly used to crush agricultural materials. Common materials include straw or straw pellets. Straw pellets refer to the plant residues such as stems and leaves remaining after crop harvest, mainly from major crops such as rice, wheat, corn, and soybeans. After primary mechanical crushing by a pulverizer, the material is further compressed and shaped using manual or automated packaging equipment to produce solid fuel pellets with a particle size range of 3–10 mm. This technology has matured and has achieved large-scale application in the biomass energy sector.

[0003] However, secondary ultrafine grinding technology for these primary particles—a finer processing method that further grinds 3–10 mm particles to even smaller particle sizes—is still in the exploratory stage and has not yet formed a mature commercial product system. Breakthroughs in secondary grinding technology are of great significance for improving the efficiency of downstream applications: in biomass energy utilization, finer particles can significantly increase specific surface area, optimize combustion kinetics, and thus improve combustion efficiency and energy conversion rate; in feed processing, micronization helps improve the digestibility of fiber structure and enhances the utilization rate of crude fiber by animals.

[0004] However, the crushers used in existing technologies for secondary ultrafine crushing of primary particles generally have the following problems: Poor uniformity of crushed particle size makes it difficult to consistently achieve ultrafine particle size. Currently, most equipment used for secondary crushing uses traditional single-stage grinding structures, such as hammer mills and roller mills. Although straw pellets are solid shaped materials, their internal fiber structure is loose and tough. Traditional hammer impact or roller extrusion methods often result in both over-crushing and under-crushing. Some particles are excessively impacted into powder (causing dust to fly during subsequent processing), while others are not fully ground due to fiber entanglement and require multiple re-crushing processes. This leads to a large deviation in the particle size of the final product, failing to meet the stringent requirements for particle size consistency in biomass combustion or feed processing. In addition, existing equipment suffers from rapid wear and tear on vulnerable parts and requires frequent maintenance. The small amount of siliceous impurities in straw pellets (such as the siliceous layer on the surface of crop stalks) will cause severe friction with the grinding parts of the equipment, such as screens, during the secondary ultrafine crushing process. This will cause damage with long-term use, thus requiring repair and replacement. In existing crushers, when it is necessary to inspect and maintain the internal parts, the entire outer shell of the equipment needs to be disassembled to remove the internal parts. The outer shell is heavy, and disassembly requires multiple people to work together, which is inconvenient, time-consuming, and labor-intensive. Utility Model Content

[0005] This utility model provides a material crusher, the purpose of which is to perform secondary crushing of materials, so that the material particles can be more fully crushed and ground.

[0006] This utility model is achieved through the following technical solution: A material crusher includes an upper frame, a lower frame, a working rotor, a feed inlet, an upper screen frame, a lower screen frame, and a drive unit. The upper frame and the lower frame are closed together to form a sealed space. The feed inlet is located on the upper frame. The upper screen frame and the lower screen frame are respectively installed on the inner sides of the upper frame and the lower frame, and upper and lower screens are respectively provided on the upper screen frame and the lower screen frame. The upper screen, the lower screen, and the upper frame form a crushing chamber, and the feed inlet communicates with the crushing chamber. A discharge outlet is provided on the lower frame. The working rotor is located inside the crushing chamber, and both ends of the working rotor are rotatably connected to both ends of the lower frame. Multiple blades are connected to the circumferential surface of the working rotor, and the drive unit can drive the working rotor to rotate.

[0007] Compared with existing technologies, this solution has the following advantages and beneficial effects: This solution uses an upper and lower screen, along with multiple blades rotating at high speed on the circumference of the working rotor, to further grind the primary crushed material particles into finer particles with smaller diameters. This directly meets the downstream application's demand for ultrafine particles and fills the gap in industrialized equipment for secondary ultrafine crushing technology.

[0008] In this design, the working rotor rotates at high speed within a sealed crushing chamber (enclosed by an upper screen, a lower screen, and an upper frame). The blades interact with the upper and lower screens through multiple shearing and impact actions, enhancing the crushing force on the particles. The arc structure formed by the upper and lower screens, together with the upper frame, constitutes a circular crushing cavity. This structure positions the working rotor at the center, allowing the blades on its circumference to form a full-circumferential, uniform shearing and impact gap with the arc-shaped screens. This ensures thorough crushing and grinding of the material, resulting in more uniform particle size. Furthermore, particles meeting the required particle size will fall through the mesh of the upper and lower screens, while particles not meeting the size requirements will continue to be further crushed within the crushing chamber. This eliminates the need for repeated re-crushing and ensures the uniformity and consistency of the final crushed particle size.

[0009] Within the circular cavity, the material is subjected to centrifugal force, ensuring full contact with the blades and the inner wall of the screen. This avoids the crushing dead zones that are common in traditional linear screens, thus guaranteeing efficient and effective material crushing. The circumferential crushing action delivers multi-directional, high-frequency impacts to the material, significantly reducing the initial particle crushing time, increasing the throughput per unit time, and effectively improving crushing efficiency.

[0010] Furthermore, the upper frame includes a left-flipping frame and a right-flipping frame, which are respectively hinged to the top sides of the lower frame. When the left-flipping frame and the right-flipping frame are closed together, they form a sealed space with the lower frame.

[0011] Beneficial effects: The upper and lower frames close together to form a closed space, which not only prevents particles from splashing and dust from leaking during crushing, reducing environmental pollution, but also facilitates the opening and closing of the equipment for maintenance (such as replacing blades and cleaning screens); the left and right tilting frames can be tilted open to the sides respectively, so that the originally closed circular crushing cavity (including the arc-shaped upper screen, lower screen and working rotor) is fully exposed, making it convenient to inspect and replace the internal structure.

[0012] The left and right frames can be flipped individually or simultaneously: when only a partial inspection is needed (such as a screen blockage on one side), the corresponding side frame can be opened individually to reduce unnecessary operation steps; when overall maintenance or replacement of large components (such as the working rotor) is required, flipping both sides simultaneously can provide maximum operating space.

[0013] Furthermore, two telescopic cylinders are provided on both sides of the lower frame, and one end of the two telescopic cylinders is hinged to the left tilting frame and the right tilting frame respectively, and the other end of the two telescopic cylinders is hinged to the left and right parts of the lower frame respectively.

[0014] Beneficial effects: When opening the frame, the telescopic cylinder extends to generate thrust, assisting the operator in easily lifting the left and right tilting frames to both sides without relying on manual force to overcome the frame's own weight, making it especially suitable for heavy-duty frames of large equipment. When closing the frame, the telescopic cylinder retracts to generate pull, which can smoothly control the frame's descent speed, preventing it from falling rapidly due to its own weight, reducing the difficulty of operation, and allowing a single person to complete the opening and closing operation, saving time and effort.

[0015] Furthermore, the lower frame is connected to bearing seats at both ends, and the working rotor is rotatably connected to the two bearing seats at both ends respectively.

[0016] Beneficial effects: The bearing housing configuration in this solution provides a rotation point for the installation of the working rotor, making the installation position of the working rotor more precise and its operation more stable.

[0017] Furthermore, the bearing housing is detachably connected to the lower frame, and a lifting ring is connected to the top of the bearing housing.

[0018] Beneficial effects: In this solution, when it is necessary to replace or repair the working rotor, the entire working rotor can be lifted by disassembling the bearing housing, and the lifting ring on the top of the bearing housing facilitates lifting.

[0019] Furthermore, the upper sides of the lower frame are connected to ribs, and the ribs are provided with downward-curving hooks.

[0020] Beneficial effects: The ribs in this design can improve the structural strength and deformation resistance of the upper part of the frame. The hooks on the ribs facilitate the limiting and fixing of the ropes used to bind the lower frame during later handling. During handling, the ropes used for binding can be directly put into the hooks, which can effectively limit the ropes and prevent them from slipping due to equipment tilting or shaking during handling.

[0021] Furthermore, multiple blade holders are connected to the circumferential surface of the working rotor, and the multiple blades are detachably connected to the multiple blade holders respectively.

[0022] Beneficial effects: In this design, the blade and blade holder are detachably connected, which makes it easy to replace worn blades and thus ensures the crushing effect.

[0023] Furthermore, the upper screen frame and the lower screen frame are detachably connected to the upper frame and the lower frame, respectively.

[0024] Beneficial effect: This setup makes it easy to replace or repair the upper and lower screens later.

[0025] Furthermore, a guide plate is provided inside the lower frame. The guide plate is V-shaped, and the discharge port is located at the bottom upper side of the guide plate.

[0026] Beneficial effects: In this design, the V-shaped guide plate guides the material falling from the screen, causing it to accumulate at the discharge port for easy discharge. After passing through the screen, the material naturally slides down the inclined surface of the V-shaped guide plate and eventually converges at the discharge port at the bottom of the guide plate, preventing the material from scattering and accumulating inside the lower frame and ensuring directional material flow.

[0027] Compared to planar or irregular guiding structures, V-shaped structures have a more concentrated converging effect, allowing materials to continuously gather towards the discharge port, thus solving the problems of uneven discharge and excessive residue caused by material dispersion.

[0028] Furthermore, an adjusting plate is provided inside the feed inlet. One end of the adjusting plate is rotatably connected to one side of the feed inlet. A push rod is threadedly connected to one side of the feed inlet. The push rod is arranged horizontally, and one end of the push rod abuts against the adjusting plate. Twisting the push rod in the forward or reverse direction can drive the adjusting plate to rotate and adjust the feed amount of the feed inlet.

[0029] Beneficial effects: In this solution, the adjustment plate can be rotated by turning the top rod, which can flexibly change the gap between the adjustment plate and the inner wall of the feed inlet, thus realizing stepless adjustment of the feed amount.

[0030] The feed plate can be adjusted by turning the top rod forward to increase the feed gap and increase the feed speed, or the feed plate can be turned backward to reduce the feed rate by swinging the top rod back. This adjustment method allows the feed rate to be precisely matched with the crushing capacity of the working rotor, avoiding blockage of the cavity and motor overload due to excessive feed, or idling and low efficiency due to insufficient feed, ensuring that the crushing process is always in optimal condition. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is a perspective view of an embodiment of a material crusher according to the present invention; Figure 2 This is a top view of an embodiment of a material crusher according to the present invention; Figure 3 for Figure 2 Sectional view at point AA; Figure 4 This is a schematic diagram of the internal structure of a material crusher according to an embodiment of the present invention after opening the right tilting frame; Figure 5 for Figure 3 A magnified view of a section at point B in the middle; Figure 6This is a schematic diagram of the structure of the upper screen frame and the upper screen installed in the right tilting frame in an embodiment of the material crusher of this utility model; Figure 7 This is a schematic diagram showing the state of the left and right tilting frames after they are opened in an embodiment of the material crusher of this utility model.

[0032] The attached diagram shows the markings and corresponding component names: 1. Feed inlet, 2. Left tilting frame, 3. Hydraulic telescopic cylinder, 4. Lower support rod seat, 5. Upper support rod seat, 6. Bearing seat, 7. Lifting ring, 8. Working rotor, 9. Lower screen frame, 10. Fixing block, 11. Lower frame, 12. Guide plate, 13. Discharge port, 14. Base frame, 15. Motor, 16. Upper screen frame, 17. Right tilting frame, 18. Belt, 19. Blade seat, 20. Blade, 21. Hinge seat, 22. Hinge plate, 23. Rib, 24. Upper screen, 25. Lower screen, 26. Adjusting plate, 27. Rotating seat, 28. Top rod, 29. Connecting shaft, 20. Connecting block, 21. Protective cover, 22. Lifting lug. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0034] As one embodiment of this application, such as Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides a material crusher, including an upper frame, a lower frame 7, a working rotor 5, a feed inlet 1, an upper screen frame 11, a lower screen frame 6, and a drive unit. The upper frame and lower frame 7 are closed together to form a sealed space. The feed inlet 1 is located on the upper frame. The upper screen frame 11 and the lower screen frame 6 are respectively installed inside the upper frame and the lower frame 7, and the upper screen frame 11 and the lower screen frame 6 are respectively provided with an upper screen 19 and a lower screen 19. 1. The upper screen 19, the lower screen 191, and the upper frame form a crushing chamber. The mesh diameter of the upper screen 19 and the lower screen 191 is less than 3mm. The feed inlet 1 is connected to the crushing chamber. The lower frame 7 is provided with a discharge outlet 8. The material falling from the upper screen 19 and the lower screen 191 enters the space of the lower frame 7 and is discharged through the discharge outlet 8. In practice, an external exhaust fan can be connected to the discharge outlet 8 to extract and collect the crushed material. In this embodiment, the working rotor 5 is located inside the crushing chamber, and the two ends of the working rotor 5 are rotatably connected to the two ends of the lower frame 7 respectively. Multiple blades 15 are connected to the circumferential surface of the working rotor 5, and the driving unit can drive the working rotor 5 to rotate.

[0035] In one embodiment, the upper frame includes a left tilting frame 2 and a right tilting frame 12, which are respectively hinged to the top sides of the lower frame 7. After the left tilting frame 2 and the right tilting frame 12 are closed together, they form a sealed space with the lower frame 7. The upper screen frame 11 is connected to the right tilting frame 12. The upper screen frame 11 is quarter-circular, and the lower screen frame 6 is semi-circular. The two sides of the lower screen frame 6 are connected to the inner sides of the lower frame 7. The upper screen 19 and the lower screen 191 have gaps between them and the right tilting frame 12 and the lower frame 7, respectively, to facilitate the falling of materials. like Figure 1 As shown, the left tilting frame 2 and the right tilting frame 12 are fixed at their close ends by bolts. The bottom of the left tilting frame 2 and the right tilting frame 12 are fixed to the top of the lower frame 7 by bolts. The outer sides of the left tilting frame 2 and the right tilting frame 12 are both welded or screwed with hinge plates 17, which are in the shape of a 7.

[0036] Hinges 16 are welded or screwed to both sides of the upper part of the lower frame 7. The lower parts of the hinge plates 17 on the left tilting frame 2 and the right tilting frame 12 are rotatably connected to the hinges 16 on both sides of the lower frame 7 by pins, thereby realizing the hinge connection between the left tilting frame 2 and the right tilting frame 12 and the lower frame 7.

[0037] like Figure 7 As shown, when it is necessary to open the left flip frame 2 and the right flip frame 12, the bolts between the left flip frame 2 and the right flip frame 12, as well as the bolts between the left flip frame 2 and the right flip frame 12 and the lower frame 7, can be removed to open the left flip frame 2 and the right flip frame 12.

[0038] In one embodiment, such as Figure 1 As shown, in this embodiment, two telescopic cylinders are provided on both sides of the lower frame 7. In this embodiment, the telescopic cylinders are located on the front and rear sides of the lower frame 7, and one end of the two telescopic cylinders is hinged to the left tilting frame 2 and the right tilting frame 12 respectively. The other end of the two telescopic cylinders is hinged to the left and right parts of the lower frame 7 respectively. In this embodiment, a lower support rod seat 301 is welded or screwed onto the lower frame 7, and an upper support rod seat 302 is welded or screwed onto the lower part of the left tilting frame 2 and the right tilting frame 12. The two ends of the telescopic cylinders are rotatably connected to the upper support rod seat 302 and the lower support rod seat 301 respectively through a rotating shaft.

[0039] The telescopic cylinder can be an electric telescopic cylinder, a pneumatic telescopic cylinder, or a hydraulic telescopic cylinder 3. In this embodiment, the telescopic cylinder is a hydraulic telescopic cylinder 3, also known as a hydraulic oil cylinder.

[0040] In this embodiment, when the bolts between the left flip frame 2 and the right flip frame 12, as well as the bolts between the left flip frame 2 and the right flip frame 12 and the lower frame 7 are removed, the left flip frame 2 and the right flip frame 12 can be automatically flipped open by the hydraulic telescopic cylinder 3, which is more labor-saving and easier to operate.

[0041] In one embodiment, such as Figure 1 As shown, the lower frame 7 is connected to bearing seats 4 at both ends, and the working rotor 5 is rotatably connected to the two bearing seats 4 at both ends respectively.

[0042] In this embodiment, the bearing housing 4 is detachably connected to the lower frame 7. Specifically, the two bearing housings 4 are fixed to the front and rear sections of the lower frame 7 respectively by bolts, and a lifting ring 401 is connected to the top of the bearing housing 4. In this embodiment, when it is necessary to inspect or replace the working rotor 5, the left tilting frame 2 and the right tilting frame 12 are opened by using the hydraulic telescopic cylinder 3, and the bolts between the bearing housing 4 and the lower frame 7 are loosened, so that the working rotor 5 can be lifted out.

[0043] In one embodiment, such as Figure 1 As shown, the upper sides of the lower frame 7 are connected to ribs 18. The ribs 18 are provided with downward-curving hooks. The ribs 18 can improve the structural strength and deformation resistance of the upper part of the frame. The hooks on the ribs 18 can be used to limit and fix the ropes used to bind the lower frame 7 during the later handling process. During handling, the ropes used for binding can be directly put into the hooks. The hooks can effectively limit the ropes and prevent the ropes from slipping due to the tilting or shaking of the equipment during handling.

[0044] In one embodiment, combined Figure 3 As shown, multiple blade holders 14 are connected to the circumferential surface of the working rotor 5, such as... Figure 4 and Figure 7 As shown, the blade holders 14 are evenly distributed along the axial and circumferential directions of the working rotor 5, covering the entire circumferential surface of the working rotor 5. In this embodiment, the blade holders 14 are welded and fixed to the outside of the working rotor 5. Multiple blades 15 are detachably connected to multiple blade holders 14 respectively. In this embodiment, the blades 15 are connected to the blade holders 14 by bolts, making replacement more convenient.

[0045] The blade 15 has cutting edges milled in all directions, which is more conducive to crushing straw granular materials when rotating at high speed.

[0046] In one embodiment, the upper screen frame 11 and the lower screen frame 6 are detachably connected to the upper frame and the lower frame 7, respectively, and the upper screen 19 and the lower screen 191 are respectively embedded in the upper screen frame 11 and the lower screen frame 6, combined with Figure 3 and Figure 6As shown, the upper screen frame 11 is fixed to the right tilting frame 12 by bolts. When the upper screen frame 11 needs to be repaired, the right tilting frame 12 is opened by the hydraulic telescopic cylinder 3, the bolts on the upper screen frame 11 and the right tilting frame 12 are removed, and the upper screen frame 11 can be pulled out and replaced.

[0047] Combination Figure 4 As shown, both sides of the lower screen frame 6 are welded and fixed, integrally formed, or connected with screws, with multiple fixing blocks 601. The multiple fixing blocks 601 are distributed at intervals along the axial direction of the lower screen frame 6. Both sides of the lower frame 7 are welded and fixed or connected with screws, with multiple lower support blocks 701. The lower support blocks 701 are distributed at intervals along the axial direction of the lower frame 7. The lower screen frame 6 is fixed to the multiple lower support blocks 701 in sequence by bolts through the multiple fixing blocks 601.

[0048] When the lower screen frame 6 needs to be inspected, after the left tilting frame 2 and the right tilting frame 12 are opened by hydraulic telescopic extension, the bolts on the fixing blocks 601 on both sides of the lower screen frame 6 can be removed, and the lower screen frame 6 can be pulled upward and replaced.

[0049] In one embodiment, such as Figure 3 As shown, a guide plate 702 is provided inside the lower frame 7. The guide plate 702 is V-shaped. The two ends of the guide plate 702 are welded and fixed to the inner sides of the lower frame 7 or connected by screws. The discharge port 8 is located at the bottom of the upper side of the guide plate 702. In this way, the guide plate 702 can guide the material falling from the lower screen 191 and the upper screen 19, so that the material gathers in the direction of the discharge port 8, which makes it easier to collect the crushed material.

[0050] In one embodiment, combined Figure 3 and Figure 5 As shown, an adjusting plate 20 is provided inside the feed inlet 1. One end of the adjusting plate 20 is rotatably connected to one side of the feed inlet 1. In this embodiment, a rotating seat 21 is welded and fixed on the left side of the feed inlet 1. A connecting block 24 is welded and fixed on the left side of the adjusting plate 20 and above it. A connecting shaft 23 is coaxially welded and fixed on the connecting block 24. A rotating groove is opened on the top of the rotating seat 21. The connecting shaft 23 is located in the rotating groove. The connecting block 24 and the adjusting block are rotatably engaged with the rotating seat 21 through the connecting shaft 23. A push rod 22 is threadedly connected to one side of the feed inlet 1. The push rod 22 is arranged horizontally, with one end abutting against the adjusting plate 20 and the other end located outside the feed inlet 1. By turning the push rod 22 in the forward or reverse direction, the adjusting plate 20 can be driven to rotate, thereby adjusting the feed rate of the feed inlet 1. For example, turning the push rod 22 in the forward direction can push the adjusting plate 20 to increase the feed gap and increase the feed speed, or turning the push rod 22 in the reverse direction can cause the adjusting plate 20 to swing back and reduce the gap, thereby reducing the feed rate.

[0051] In this embodiment, a protective cover 25 is bolted to the outside of the feed inlet 1. The protective cover 25 fits over the outside of the push rod 22, providing protection and sealing to prevent straw particles, dust, and other impurities from adhering to the threads of the push rod 22 during production. This prevents thread blockage or wear that could cause adjustment jamming, ensuring smooth rotation of the push rod 22 and maintaining the accuracy of the feed rate adjustment. It also prevents deformation or damage to the push rod 22 caused by external collisions or foreign object impacts, protecting the threaded connection between the push rod 22 and the feed inlet 1. Furthermore, it prevents straw dust generated during the crushing process from leaking out through the gap between the push rod 22 and the feed inlet 1, reducing dust pollution in the workshop.

[0052] In one embodiment, such as Figure 1 As shown, lifting lugs 26 are welded and fixed on both sides of the top of the right-tilting frame 12, which facilitates the hoisting of the entire equipment.

[0053] In one embodiment, such as Figure 1 As shown, the drive unit can be driven by belt drive, gear drive, direct coupling, etc. In this embodiment, the drive unit is illustrated by belt drive. Specifically, the drive unit in this embodiment includes a motor 10 and a belt 13. Pulleys are connected to the output shaft of the motor 10 and one end of the working rotor 5. The power of the motor 10 is transmitted to the working rotor 5 through the pulleys and the belt 13, thereby driving the working rotor 5 to rotate.

[0054] In one embodiment, such as Figure 1 As shown, the material crusher in this embodiment also includes a base frame 9, and a motor 10 and a lower frame 7 are fixed to the base frame 9 by bolts.

[0055] This utility model discloses a material crusher with highly efficient particle size control capabilities, capable of crushing raw materials to a particle size of less than 3mm, achieving micro-fine processing and meeting the fine particle size requirements of biomass fuels, feed base materials, and other raw materials. In terms of processing capacity, the equipment design optimizes the crushing chamber structure and power transmission system, achieving a rated production capacity of over 25t / h, exhibiting significant high-throughput processing characteristics and suitable for large-scale industrial production needs.

[0056] Furthermore, the equipment's structural design emphasizes maintainability and ease of operation, facilitating the installation, disassembly, and maintenance of key components, effectively reducing operational complexity and downtime, and enhancing the continuity and reliability of equipment operation.

[0057] The crusher relies on an external fan for material discharge. In the material discharge and conveying process, a pneumatic conveying device can be integrated at the discharge port 8 to achieve closed conveying of the crushed material using airflow power. This effectively suppresses dust generation during the transfer process, significantly reduces dust concentration in the working environment, improves working conditions, and meets industrial environmental emission standards.

[0058] The specific implementation process is as follows: Straw pellets are fed through inlet 1; the upper screen frame 11 is installed on the right tilting frame 12 and forms a crushing chamber with the lower screen 191 of the lower screen frame 6. At this time, the motor 10 drives the working rotor 5 to rotate at high speed in the direction of the right tilting frame 12 through the belt 13. The right tilting frame 12 is equipped with an upper screen 19 with a diameter of less than 3mm (this screen plays a role in crushing and screening). The material is crushed by shearing through the blades 15 on the working rotor 5 and by impacting the upper screen 19.

[0059] As the working rotor 5 rotates at high speed, the material is driven into a dynamic state on the lower screen 191. The lower screen frame 6 is also equipped with a lower screen 191 with a diameter of less than 3mm, which together with the upper screen 19 forms a closed crushing chamber. The material smaller than 3mm is drawn away by the exhaust fan located at the discharge port 8. As the working rotor 5 rotates at high speed, the material is driven into a dynamic state on the lower screen 191, and the material larger than 3mm is agitated and re-crushed. The lower screen 191 acts as an impact plate, which has an impact crushing effect on the material.

[0060] It should be noted that the above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A material crusher, characterized in that, The device includes an upper frame, a lower frame, a working rotor, a feed inlet, an upper screen frame, a lower screen frame, and a drive unit. The upper frame and the lower frame are joined together to form a sealed space. The feed inlet is located on the upper frame. The upper screen frame and the lower screen frame are respectively installed on the inner sides of the upper frame and the lower frame, and upper and lower screens are respectively provided on the upper screen frame and the lower screen frame. The upper screen, the lower screen, and the upper frame form a crushing chamber, and the feed inlet communicates with the crushing chamber. The lower frame has a discharge outlet. The working rotor is located inside the crushing chamber, and both ends of the working rotor are rotatably connected to both ends of the lower frame. Multiple blades are connected to the circumferential surface of the working rotor, and the drive unit can drive the working rotor to rotate.

2. The material crusher according to claim 1, characterized in that, The upper frame includes a left-flipping frame and a right-flipping frame. The left-flipping frame and the right-flipping frame are respectively hinged to the top sides of the lower frame. When the left-flipping frame and the right-flipping frame are closed together, they form a sealed space with the lower frame.

3. A material crusher according to claim 2, characterized in that, Two telescopic cylinders are provided on both sides of the lower frame, and one end of the two telescopic cylinders is hinged to the left tilting frame and the right tilting frame respectively, and the other end of the two telescopic cylinders is hinged to the left and right parts of the lower frame respectively.

4. A material crusher according to claim 1, characterized in that, The lower frame is connected to bearing seats at both ends, and the working rotor is rotatably connected to the two bearing seats at both ends respectively.

5. A material crusher according to claim 4, characterized in that, The bearing housing is detachably connected to the lower frame, and a lifting ring is connected to the top of the bearing housing.

6. A material crusher according to claim 2, characterized in that, The upper sides of the lower frame are connected to ribs, and the ribs are provided with downward-curving hooks.

7. A material crusher according to claim 1, characterized in that, Multiple blade holders are connected to the circumferential surface of the working rotor, and the multiple blades are detachably connected to the multiple blade holders respectively.

8. A material crusher according to claim 1, characterized in that, The upper screen frame and the lower screen frame are detachably connected to the upper frame and the lower frame, respectively.

9. A material crusher according to claim 1, characterized in that, The lower frame is equipped with a guide plate, which is V-shaped, and the discharge port is located at the bottom upper side of the guide plate.

10. A material crusher according to any one of claims 1-9, characterized in that, An adjusting plate is provided inside the feed inlet. One end of the adjusting plate is rotatably connected to one side of the feed inlet. A push rod is threadedly connected to one side of the feed inlet. The push rod is arranged horizontally, and one end of the push rod abuts against the adjusting plate. Twisting the push rod in the forward or reverse direction can drive the adjusting plate to rotate and adjust the feed rate of the feed inlet.

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