Multipurpose material crusher

Abstract

The invention provides a multipurpose material crusher, and belongs to the technical field of material crushing equipment. The pulverizer comprises a pulverizing box, a feeding end, a discharging end, a base, a pulverizing assembly and a screening assembly, wherein the pulverizing assembly and the screening assembly are detachably arranged in the pulverizing box from top to bottom. The crushing assembly comprises a driving motor, a rotating shaft and a plurality of cutting groups arranged on the rotating shaft; the screening assembly is a screening hole plate arranged below the cutting set. The cutting set comprises a rough cutting set and a fine cutting set. The screening assembly corresponding to the rough cutting set comprises a screening hole plate I and a screening hole plate II which are different in hole diameter. The rough cutting set and the fine cutting set are each composed of a plurality of spiral cutting knives arranged in parallel, the spiral cutting knives are detachably installed on the rotating shaft, the widths of the spiral cutting knives are gradually increased from top to bottom, and the adjacent distances are gradually decreased from top to bottom. The crushing box adopts a sectional structure and is provided with a plurality of layers of detachable and replaceable sieve pore plates, so that graded crushing treatment of materials can be realized, the particle size can be precisely controlled, the crushing requirements of different materials are met, and the crushing device is suitable for the fields of food processing, kitchen garbage treatment and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of material crushing equipment, in particular to a multipurpose material crusher. BACKGROUND

[0002] A material crusher is an important device widely used in fields such as agriculture, food processing, and waste treatment. Its main function is to break various materials into particles of desired size. With the development of industry and agriculture, the demand for material crushing is increasingly sophisticated and diverse, prompting the development of crushing equipment towards high efficiency, precision, and multi-functionality.

[0003] Currently, common material crushers on the market mainly include hammer crushers, blade crushers, roller crushers, and other types. For example, Chinese patent document CN107497557A discloses a crusher comprising a housing, a crushing box, a screen plate, and a crushing assembly. The crushing assembly includes a motor, a spiral crushing blade connected to the motor output shaft, and a hammer blade installed on the crushing box cylinder wall. The spiral crushing blade and the hammer blade are oppositely arranged, having the characteristics of high efficiency and non-clogging of screen holes.

[0004] In terms of material classification and crushing, Chinese patent document CN116251652B proposes a dolomite particle crushing device, which includes a support table, a crushing box, a crushing box, a primary crushing mechanism, and a secondary crushing mechanism. The two-stage crushing structure improves processing quality. Similarly, Chinese patent document CN108995084A discloses an environmentally friendly plastic product recycling crushing device, which includes a coarse cutting device and a fine cutting device, achieving double cutting of plastics and improving production efficiency.

[0005] In terms of screen system design, Chinese patent document CN218282026U introduces a chili crusher, which sets a vibrating screen at the bottom of the crushing box and fixes a first screen mesh at the outlet. The screen mesh is provided with multiple screen hole groups in the axial direction, the screen holes in the same screen hole group have consistent diameters, and the diameters of corresponding screen holes in the multiple screen hole groups increase sequentially, achieving the collection of chili powder of different particle sizes.

[0006] In addition, Chinese patent document CN119588476B discloses a manure crushing equipment for organic fertilizer production, which includes a crushing box, a crushing device, a discharge device, and a pretreatment device. The particle size of the discharged particles can be adjusted according to actual needs.

[0007] However, the material crushers in the prior art still have the following problems: Firstly, most of the crushing equipment has fixed structure and cannot be disassembled, lacking flexibility, and cannot replace internal components according to the material breaking requirements, making it difficult to adapt to the crushing requirements of different material types. Especially when dealing with materials of different hardness, humidity and viscosity, it often needs to replace the whole set of equipment, increasing the production cost, and the overall structure is not conducive to the later maintenance and replacement of its internal components.

[0008] Secondly, the existing crusher is mostly single-stage crushing structure, which cannot realize fine control of the material, resulting in uneven particle size of the crushed material, affecting the quality of the final product. Although some equipment adopts multi-stage crushing structure, the coordination between each stage is insufficient, making it difficult to realize continuous and efficient classification crushing.

[0009] Thirdly, the existing crushing equipment often lacks effective sealing design at the connection between the motor and the discharge chamber, which easily leads to the entry of material residues into the motor, causing equipment damage and reducing the service life of the equipment.

[0010] Fourthly, the screening system design is not reasonable, and it is difficult to flexibly adjust the screen hole size according to the characteristics of different materials and the final use, limiting the application range of the equipment.

[0011] Therefore, it is urgent to develop a multifunctional material crusher with reasonable structure, diverse functions, good sealing performance and precise classification crushing, to meet the diversified needs of material crushing in modern industrial and agricultural production. SUMMARY

[0012] In order to solve these problems, the purpose of the present application is to provide a new type of multifunctional material crusher. The equipment should have flexibility, high efficiency and precision, and be able to adapt to different types of materials and crushing requirements. At the same time, it should also consider strengthening the sealing design to improve the safety and durability of the equipment. In addition, the use of modular design will help to realize quick disassembly and maintenance, improve the availability of the equipment and the convenience of operation.

[0013] The technical scheme adopted by the present application is as follows: The material crusher comprises a crushing box, a feeding end installed at the top of the crushing box, a discharging end at the bottom of the crushing box, and a crushing assembly and a screening assembly arranged in the crushing box from top to bottom; the bottom of the crushing box is provided with a base; the crushing assembly comprises a driving motor, a rotating shaft connected with the output shaft of the driving motor, and a plurality of cutting groups arranged on the rotating shaft; the screening assembly is a screen plate arranged below the cutting group.

[0014] According to the technical scheme, the material is sent into the feeding end at the top of the crushing box by manual or a screw feeder, and is broken into small particle size material under the rotating cutting action of multiple sets of cutting blades until the particle size of the material meets the requirement of the screen hole plate, and then the material is discharged from the discharging end, thereby completing the crushing of the material.

[0015] Preferably, the crushing assembly further comprises a fixed strip fixed on the inner wall of the crushing box, the fixed strip is a character-shaped long strip, both ends of the fixed strip are connected to the crushing box, and a circular hole is arranged at the middle portion of the fixed strip, the circular hole is rotatably connected to the rotating shaft through a bearing, the fixed strip can improve the stability of the rotating shaft and prevent the rotating shaft from swinging, and a tooth surface is arranged on the surface of the fixed strip to assist in cutting and crushing the material.

[0016] Preferably, the cutting group comprises a rough cutting group and a fine cutting group, and correspondingly, the screening assembly comprises a screen hole plate I and a screen hole plate II, the screen hole plate I has a larger hole diameter than the screen hole plate II, the screen hole plate I is arranged below the rough cutting group, and the screen hole plate II is arranged below the fine cutting group. The material is subjected to primary crushing by the rough cutting group, and then is subjected to secondary crushing by the fine cutting group after meeting the hole diameter requirement of the screen hole plate I, until the hole diameter requirement of the screen hole plate II is met, thereby the crushing efficiency of the material is improved, the situation of different particle sizes is avoided, and the particle size of the output material is accurately controlled to meet the crushing requirements of different materials.

[0017] Preferably, the rough cutting group and the fine cutting group each comprise a plurality of parallel spiral cutting knives, the spiral cutting knives are detachably arranged on the rotating shaft, the width of the spiral cutting knife gradually increases from top to bottom, and the distance between adjacent spiral cutting knives gradually decreases from top to bottom.

[0018] Further, the distance between adjacent knives in the fine cutting group is smaller than the distance between adjacent knives at the corresponding position in the rough cutting group.

[0019] Further, the spiral cutting knife is shaped like a fan blade, and generates downward air pressure during cutting, thereby helping the crushed material to be discharged from the discharging end at the bottom of the crushing box; the spiral cutting knife comprises a main body and a blade portion, the main body is concave inward in the middle, and the blade portion is annularly arranged with a plurality of spiral curved blades at the circular arc or the outer contour of the main body.

[0020] Preferably, the screen hole plate is circular, a plurality of rectangular limiting grooves are annularly arranged on the circumference of the screen hole plate, and a plurality of screen holes are uniformly arranged on the screen hole plate. The shape of the screen hole limiting groove is not limited to the circular shape and the rectangular shape, but can also be triangular, elliptical, rhombic, etc.

[0021] Preferably, the crushing box is of a segmented structure and is composed of several sections of cylinders, the screen hole plate I and the screen hole plate II are respectively located at the connection of the first group, the second group and the third group, the diameter of the screen hole plate is the same as the outer diameter of the crushing box, the inner wall of the crushing box is provided with a corresponding number of wall tooth strips, the adjacent inner walls of the crushing box are connected and fixed through the wall tooth strips, the wall tooth strips and the crushing box are provided with positioning holes, bolts are installed in the positioning holes, the connection and fixation of the adjacent cylinders are completed, the diameter of the screen hole plate is the same as the outer diameter of the crushing box, during installation, the adjacent cylinders sandwich the screen hole plate I, and the vertical position of the screen hole plate I is limited. Correspondingly, the rectangular limiting grooves on the screen hole plate are aligned with the wall tooth strips, and the wall tooth strips limit the screen hole plate in the circumferential direction.

[0022] Further, the end face of the wall tooth strip is provided in the form of a toothed strip, and the tooth surface is provided with a cutting edge. During the rotation of the material in the crushing box, the material will be cut by the cutting edge of the end face of the wall tooth strip, thereby further improving the crushing effect of the device on the material.

[0023] Preferably, the feeding end comprises a cylindrical baffle and a conical feeding port; the discharging end comprises an inclined plate, the inclined plate is fixedly connected with the crushing box, and is in the form of an ellipse, preferably, the inclination angle is 30 degrees, the lower end of the crushing box is provided with a discharging port, and the middle part is provided with an elliptical through hole. The material crushed by two stages falls onto the inclined plate under the action of gravity and air pressure, and is sent to the discharging port along the inclined direction of the inclined plate.

[0024] Further, the feeding port at the top of the crushing box is provided with a support, the middle part of the support is provided with a bearing rotatably connected with the top end of a rotating shaft; the bottom end of the rotating shaft is fixedly connected with the output shaft of a driving motor through a shaft coupling, a waterproof cylinder is fixedly arranged at the central hole of the inclined plate, the rotating shaft penetrates through the waterproof cylinder, and the top of the waterproof cylinder is provided with a sealing ring in interference fit. Preferably, the sealing ring is made of fluorine rubber material structure with stable chemical properties, the sealing performance of the connection between the central hole of the inclined plate and the rotating shaft is ensured through the waterproof cylinder, and material residues are prevented from entering the motor through the gap, thereby avoiding equipment failure.

[0025] Further, the rotating shaft is provided with external threads at the region connected with the waterproof cylinder in the lower part, and limit nuts 10 are arranged on the upper and lower sides of the waterproof cylinder after the rotating shaft penetrates through the waterproof cylinder. During the operation of the equipment, the rotating shaft may move up and down due to loosening of the shaft coupling, the limit nuts connect the rotating shaft, the waterproof cylinder and the inclined plate into an integral whole, and the displacement of the rotating shaft is prevented.

[0026] Preferably, the sidewall of the crushing box at the motor mounting position is provided with an inspection window 13, and a door plate is hingedly connected to the window.

[0027] As described above, due to the adoption of the above technical scheme, the present application has the following beneficial effects: 1. The present application innovatively adopts a segmented assembly structure design, and the modules are connected through standardized interfaces to realize flexible disassembly and assembly of the overall structure. This design not only greatly simplifies the installation process of the equipment, facilitates daily maintenance and fault repair, but also significantly improves the usability and operational convenience of the equipment, effectively reducing the production cost and time loss caused by downtime maintenance.

[0028] 2. The present application constructs a multi-stage crushing and screening integrated process by scientifically configuring multiple high-efficiency cutting components and multiple layers of precision screen mesh systems. This design can dynamically adjust the crushing parameters according to the material characteristics, realize multi-stage fine processing of the material, greatly improve the crushing efficiency, and ensure the high uniformity of the discharged particles, providing reliable protection for the stable and controllable quality of the final product.

[0029] 3. The present application adopts a double-sealing structure design at the key connection part of the motor output shaft and the discharge chamber, which effectively blocks the path of material residues and moisture invading the motor interior through the gap through the synergistic effect of dynamic sealing and static sealing. This technical solution significantly reduces the failure rate of the motor caused by foreign matter invasion, prolongs the service life of the core components of the equipment, and reduces the risk of production interruption caused by motor damage.

[0030] 4. The present application realizes the rapid replacement and adaptation of screen mesh specifications through the modular design of the detachable screen plate system. This design supports flexible adjustment of screen hole size and shape according to the processing needs and target particle size range of different materials, enabling the equipment to be widely used in food, feed, chemical and other fields of crushing processing scenarios, greatly expanding the application range and market adaptability of the equipment.

[0031] 5. The present application adopts a variable-pitch spiral cutting blade design, which forms a controllable air vortex effect during rotation by optimizing the blade arrangement density and geometric parameters. This innovative structure not only enhances the shearing force of the blade on the material, but also accelerates the axial delivery of the crushed material using wind pressure, effectively improving the discharge efficiency and reducing the risk of material blockage, ensuring the continuous and stable operation of the crushing process.

[0032] 6. The multifunctional wall rib in the present application realizes structure integration and function composition: first, as a rigid connecting piece between the crushing boxes, it ensures the stability of the overall structure of the equipment; second, the tooth-shaped positioning structure precisely limits the circumferential position of the screen mesh plate to prevent deviation during operation; third, the reinforced edge on the surface of the rib can produce high-frequency collision, friction and shearing action with the material, forming an auxiliary crushing field, which significantly enhances the processing capacity of the equipment for high-hardness and high-viscosity materials and improves the overall crushing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0033] The present application will be described by way of example and with reference to the accompanying drawings in which: Figure 1 Fig. 1 is a structural schematic diagram of the material pulverizer in the present application; Figure 2 Fig. 2 is a structural schematic diagram of the sieve plate I in the present application; Figure 3 Fig. 3 is a structural schematic diagram of the sieve plate II in the present application; Figure 4 Fig. 4 is a structural schematic diagram of another embodiment of the sieve plate in the present application; Figures 5-6 Fig. 5 is a structural schematic diagram of the spiral cutting knife structure in the present application; Figure 7 Fig. 6 is a structural schematic diagram of the spiral curved blade in the present application; Figure 8 Fig. 7 is a structural schematic diagram of the wall toothed bar in the present application; Figure 9 Fig. 8 is a structural schematic diagram of the waterproof cylinder in the present application. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0035] As shown in Figure 1 , the present embodiment provides a multipurpose material pulverizer, which includes a pulverizing box 1, a feeding end 2, a discharging end 3, a pulverizing assembly 4, a screening assembly 5 and a base 17. The feeding end 2 is arranged at the top of the pulverizing box 1, and the discharging end 3 is arranged at the bottom of the pulverizing box 1. The pulverizing assembly 4 and the screening assembly 5 are sequentially arranged from top to bottom inside the pulverizing box 1. The base 17 is arranged at the bottom of the pulverizing box 1.

[0036] In a specific embodiment, the pulverizing assembly 4 includes a driving motor 401, a rotating shaft 402 and multiple sets of cutting groups. The rotating shaft 402 is fixedly connected with the output shaft of the driving motor 401 through a shaft coupling 9, so as to ensure the stability and reliability of power transmission. The multiple sets of cutting groups are arranged on the rotating shaft 402, including a rough cutting group 403 and a fine cutting group 404. The screening assembly 5 is a sieve plate arranged below the cutting groups, and specifically includes a sieve plate I 501 and a sieve plate II 502. The aperture of the sieve plate I 501 is larger than that of the sieve plate II 502. The sieve plate I 501 is arranged below the rough cutting group 403, and the sieve plate II 502 is arranged below the fine cutting group 404. Figure 2 、 3

[0037] ​Further, the crushing assembly further comprises a fixed strip 16 fixed on the inner wall of the crushing box 1. The fixed strip 16 is not limited in shape and can be in the form of a long strip. The ends of the fixed strip 16 are respectively connected to the crushing box 1, and the middle part is provided with a round hole. The round hole is rotatably connected to the rotating shaft 402 through a bearing. The fixed strip 16 can improve the stability of the rotating shaft 402 and prevent it from swinging. The surface of the fixed strip 16 is provided with a tooth surface, which can assist in cutting and crushing the material It should be noted that the number of sieve plates in the cutting group and the screening group 5 includes but is not limited to the above examples. According to the description in the present application, the number and type of sieve plates in the cutting group and the screening group 5 can be set according to the actual height of the crushing box 1, which is within the scope of protection of the present application.

[0038] In further embodiments, the coarse cutting group 403 and the fine cutting group 404 each comprise a plurality of parallel spiral cutting knives 405, which are detachably mounted on the rotating shaft 402. The width of the spiral cutting knives 405 gradually increases from top to bottom. In this embodiment, there are seven different lengths, so that the cutting area of the spiral cutting knives 405 and the material gradually increases, the cutting and crushing effect gradually improves, and the material after being cut gradually becomes smaller. The spacing between adjacent blades in the fine cutting group 404 is smaller than the spacing between adjacent blades at the corresponding position in the coarse cutting group 403. It should be noted that the surface of the cutting tool in the cutting group includes smooth and toothed surfaces.

[0039] In further embodiments, the number of sieve plates can be flexibly set according to actual production needs, and there is no strict limitation. The specific number is determined according to the number of times of classification required. For example, if multiple fine classification is required, the number of sieve plates can be increased accordingly to ensure that the classification effect is optimal.

[0040] Regarding the shape of the sieve holes, various options are provided, including but not limited to grid, circle, ellipse, quadrilateral, and polygon (for details, please refer to the examples in Figures 2-4 Among these shapes, the grid-shaped sieve hole is preferred due to its unique structural advantages. The grid design not only increases the contact area between the material and the sieve hole, but also optimizes the material's passing path, making the material's passing property optimal, thereby improving the screening efficiency.

[0041] The thickness of the sieve plate is also not limited in this design. However, it is worth noting that appropriately increasing the thickness of the sieve plate can effectively improve its wear resistance. Thicker sieve plates can better resist material wear during long-term use, thereby prolonging the overall service life, reducing the replacement frequency and production cost.

[0042] As for the size of the screen aperture, it needs to be accurately set according to the specific material crushing particle size requirements. For example, when grinding wheat flour, in order to ensure the fineness and quality standards of the flour, the screen aperture needs to be finely set to 80-120 mesh (the specific mesh number is determined according to the flour grade requirements and actual production needs, and high-gluten flour or special-purpose flour may require finer screen holes); when processing kitchen food to make small lobster and turtle feed, since the feed has relatively loose requirements on particle size, and the passing property and nutrient retention of the material need to be considered, the screen aperture can be set to another suitable 10-40 mesh (the specific mesh number is adjusted according to the characteristics of the raw materials in the feed formula, the feeding habits of animals, and the production process requirements, for example, when the coarse feed component is more, a lower mesh number can be selected).

[0043] Further, referring to Figures 5-7 , the spiral cutting knife 405 is structured like a fan blade, which generates downward air pressure during cutting, thereby helping the crushed and cut material to be discharged from the discharge end 3 at the bottom of the crushing box 1. The spiral cutting knife 405 includes a main body 4051 and a blade part 4052. The main body 4051 is recessed inward in the middle, which can avoid the material from gathering in the center of the spiral cutting knife 405 during falling, thereby making the cutting and crushing more effective. The blade part 4052 is a ring-shaped array of several spiral curved cutting edges at the circular arc of the main body 4051, which are relatively sharp and sharp, and can effectively improve the cutting effect on the garbage.

[0044] In a specific embodiment, the screen hole plate is circular in shape, and a center hole connected with the rotating shaft is arranged at the center of the screen hole plate. Specifically, the rotating shaft 402 is rotationally connected at the connecting position of the screen hole plate through a bearing and a bearing sleeve. A plurality of rectangular limiting grooves 503 are arranged in a ring-shaped array at the circumference of the screen hole plate, and a plurality of screen holes 504 are uniformly arranged on the screen hole plate. Correspondingly, a corresponding number of wall toothed strips 6 are arranged on the inner wall of the crushing box 1. Referring to Figure 8 , the wall toothed strip 6 is an iron plate with teeth on the surface, and specifically, at least one wall toothed strip 6 is provided. Preferably, four toothed plates are provided, and two wall toothed strips 6 are symmetrically arranged on the inner side wall of the crushing box with respect to the central axis of the crushing box. The wall toothed strip 6 is fixed on the inner side wall of the crushing box by bolts. During installation, the rectangular limiting grooves 503 on the screen hole plate are aligned with the wall toothed strip 6, so that the rectangular limiting grooves 503 on the screen hole plate are clamped on the wall toothed strip 6, thereby achieving circumferential limiting of the screen hole plate. The wall toothed strip 6 is provided with a positioning hole 7, and the wall toothed strip 6 is fixedly installed on the inner wall of the crushing box 1 by installing bolts.

[0045] Further, the wall rack 6 not only plays a role in limiting the screen hole plate in the circumferential direction, but also plays a role in connecting and fixing the segmented crushing box 1. The crushing box 1 in the application is different from the traditional integral type in that it adopts a segmented assembly scheme, which facilitates the production, transportation, and later maintenance of the internal parts of the crushing box 1, replacement of parts, and the like. In the specific implementation, the wall rack 6 is provided with positioning holes 7 at the upper and lower ends, and at least one wall rack 6 is fixed with one segment of the crushing box 1 through mounting bolts. At this time, the upper part of the wall rack 6 is exposed from the crushing box 1, the rectangular limiting groove 503 of the screen hole plate is aligned with the wall rack 6, and then the screen hole plate is placed on the top of the crushing box 1. After the installation of the screen hole plate is completed, the other segment of the crushing box 1 is placed above the screen hole plate, and the fixing connection between the wall rack 6 and the crushing box 1 is completed through the installation of screws in the other positioning hole.

[0046] Further, referring to Figure 8 , the end face of the wall rack 6 is provided in the form of a rack, and the tooth surface is provided with a blade 15. During the rotation of the material in the crushing box 1, the material will be cut by the blade 15 of the end face of the wall rack 6, further improving the crushing effect of the device on the material.

[0047] Further, the length of the wall rack 6 is further limited. Generally, the length of the wall rack 6 is just the distance between the first spiral cutting knife 405 in the crushing box 1 and the last spiral cutting knife 405 at the bottom of the crushing box.

[0048] It should be noted that the structure of the wall rack 6 described above is only one preferred embodiment, and a thin plate with teeth fixed to the inner wall of the crushing box 1 can also be used, which is also within the protection scope of the application.

[0049] In a specific embodiment, the feeding end 2 includes a cylindrical baffle 201 and a conical feeding port 202. The discharging end 3 includes an inclined plate 8, which is fixedly connected with the crushing box 1 and is in the form of an ellipse with an inclination angle of 30 degrees. The lower end of the crushing box 1 is provided with a discharging port 301, and the middle part is provided with an elliptical through hole. The material after two-stage crushing falls onto the inclined plate 8 under the action of gravity and air pressure, and is sent to the discharging port 301 along the inclined direction of the inclined plate 8.

[0050] In a specific embodiment, a support is arranged at the feed inlet at the top of the pulverizing box 1, and a bearing is arranged in the middle of the support and rotatably connected with the top end of the rotating shaft 402. The bottom end of the rotating shaft 402 is fixedly connected with the output shaft of the driving motor 401 through a shaft coupling 9. Further, a central hole is arranged in the center of the sieve plate and rotatably connected with the rotating shaft, specifically, the rotating shaft 402 is rotatably connected with the sieve plate through a bearing and a bearing sleeve at the connection position. The central hole of the inclined plate 8 is an oval hole, and the projection point of the central hole of the inclined plate in the vertical direction of the shaft is the passing point of the waterproof cylinder 10 and the rotating shaft. The waterproof cylinder 10 is fixedly arranged at the central hole, the rotating shaft penetrates through the waterproof cylinder 10, and the top of the waterproof cylinder 10 is provided with a sealing ring 14 in interference fit. Preferably, the sealing ring 14 is made of fluorine rubber with stable chemical properties, so as to ensure the sealing performance of the connection position of the central hole of the inclined plate 8 and the rotating shaft 402, and prevent the material residues and water from entering the motor through the gap and causing equipment failure. Through the above, the upper and lower ends of the rotating shaft 402 are rotatably connected with the support and the shaft coupling respectively, and the middle part is rotatably connected with the sieve plate and the inclined plate respectively, which greatly prevents the rotating shaft 402 from rotating and swinging due to the length being too long, and improves the stability of the rotating cutting of the material.

[0051] In a specific embodiment, the rotating shaft 402 is provided with an external thread 11 at the area where the lower part is connected with the waterproof cylinder 10, and a limiting nut 12 is arranged on the upper and lower sides of the waterproof cylinder 10 after the rotating shaft 402 penetrates through the waterproof cylinder 10.

[0052] In a specific embodiment, the pulverizing box 1 is composed of several cylindrical segments, preferably, the cylindrical segments are made of steel cylinders or plastic cylinders, and correspondingly, three groups of the cylindrical segments are arranged, the connecting positions are fixed by the wall toothed strips 6, and the positions of the sieve plate I 501 and the sieve plate II 502 are respectively located at the connecting positions of the first group, the second group and the third group.

[0053] In a specific embodiment, the pulverizing box 1 is provided with an inspection window 13 on the side wall of the motor mounting part, and a door plate is hinged at the window, so as to facilitate the inspection and maintenance of the motor.

[0054] In a specific embodiment, the base 17 is provided with wheels at the bottom. In specific implementation, the wheels can be directional wheels or universal wheels; the wheels are at least provided with two, generally four, and the wheels are provided with brakes, so as to facilitate the movement and fixation of the equipment.

[0055] Working principle and beneficial effects: The overall structure is detachable through the sectional assembly design, facilitating installation, maintenance and repair, improving the availability and operation convenience of the equipment, and reducing the maintenance cost; the multiple cutting groups and multiple layers of screen hole plate systems realize multi-stage crushing and screening of the material, the material is subjected to primary crushing treatment through the coarse cutting group 403 blades, and after meeting the aperture requirement of the screen hole plate I 501, is subjected to secondary crushing treatment through the fine cutting group 404 blades, until meeting the aperture requirement of the screen hole plate II 502, through the above-mentioned grading treatment mode, the crushing efficiency and particle uniformity are significantly improved, and the quality of the final product is ensured; the connection between the motor output shaft and the discharge chamber is sealed, the sealing performance of the connection between the center hole of the inclined plate 8 and the rotating shaft 402 is ensured through the waterproof cylinder 10, material residues entering the motor through the gap are effectively prevented, motor damage is avoided, and the service life of the equipment is prolonged; the detachable screen plate design supports the manufacturing of different materials and different particle sizes, different models of screen hole plates can be installed according to different material types and purposes, for example, for chicken and duck meat crushing for feed production, the particle size requirement of the material is high, and the screen hole plate with small aperture is matched, for the treatment of kitchen waste, the material crushing requirement is low, and the screen hole plate with large aperture is matched, the application range of the equipment is improved, and the crushing requirements of various scenes are met; the spiral cutting blade 405 design forms the wind pressure effect by changing the blade spacing and width, which is beneficial to the discharge of the crushed material, and improves the efficiency and stability of the crushing process.

[0056] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-purpose material pulverizer characterized by, The utility model provides a kind of pulverizer, including: The pulverizer includes a pulverizing box (1), a feed end (2) mounted on the top of the pulverizing box (1), a discharge end (3) at the bottom of the pulverizing box (1), and a pulverizing assembly (4) and a screening assembly (5) sequentially arranged from top to bottom inside the pulverizing box (1). A base (17) is arranged at the bottom of the pulverizing box (1). The pulverizing assembly (4) includes a driving motor (401), a rotating shaft (402) connected with the output shaft of the driving motor (401), and multiple cutting groups arranged on the rotating shaft (402). The screening assembly (5) is a sieve plate arranged below the cutting groups.

2. A multipurpose material pulverizer according to claim 1, characterized in that, The cutting groups include coarse cutting groups (403) and fine cutting groups (404). The screening assembly (5) includes sieve plate I (501) and sieve plate II (502). The aperture of the sieve plate I (501) is larger than that of the sieve plate II (502). The sieve plate I (501) is arranged below the coarse cutting groups (403), and the sieve plate II (502) is arranged below the fine cutting groups (404).

3. A multi-purpose material pulverizer according to claim 2, wherein The coarse cutting groups (403) and the fine cutting groups (404) each consist of multiple helical cutting knives (405) arranged in parallel. The helical cutting knives (405) are detachably mounted on the rotating shaft (402). The width of the helical cutting knives (405) gradually increases from top to bottom, and the spacing between adjacent helical cutting knives gradually decreases from top to bottom.

4. A multi-purpose material pulverizer according to claim 3, wherein The spacing between adjacent blades in the fine cutting groups (404) is smaller than the spacing between adjacent helical cutting knives (405) at the corresponding positions in the coarse cutting groups (403).

5. A multipurpose material shredder as claimed in claim 4, wherein, The helical cutting knives (405) are shaped like fan blades. Each helical cutting knife (405) includes a main body (4051) and a blade part (4052). The main body (4051) is concave in the middle. The blade part (4052) is an annular array of multiple helical blades arranged at the circular arc or the outer contour of the main body (4051).

6. A multipurpose material shredder as claimed in claim 2, wherein, The sieve plate is circular in shape. Multiple rectangular limiting grooves (503) are annularly arranged at the circumference of the sieve plate. Multiple sieve holes (504) are uniformly arranged on the sieve plate. A corresponding number of wall racks (6) are arranged on the inner wall of the pulverizing box (1). The rectangular limiting grooves (503) on the sieve plate are aligned with the wall racks (6). The wall racks (6) circumferentially limit the sieve plate. The end face of the wall rack (6) is in the form of a rack. The tooth surface is provided with a blade edge (15).

7. A multipurpose material shredder as claimed in claim 6, wherein, The pulverizing box (1) is of a segmented structure and consists of multiple cylindrical segments. The positions of the sieve plate I (501) and the sieve plate II (502) are respectively located at the connection points of the first group, the second group, and the third group. The diameter of the sieve plate is the same as the outer diameter of the pulverizing box (1). The adjacent cylindrical segments are connected and fixed by the wall racks (6). The wall racks (6) and the pulverizing box (1) are provided with positioning holes. Screws are installed in the positioning holes to connect and fix the adjacent cylindrical segments. The diameter of the sieve plate is the same as the outer diameter of the pulverizing box (1). When installed, the adjacent cylindrical segments sandwich the sieve plate I (501) to vertically limit the sieve plate I (501).

8. A multipurpose material shredder as claimed in claim 1, wherein, The feeding end (2) comprises a cylindrical baffle (201) and a conical feeding port (202); the discharging end (3) comprises an inclined plate (8) which is fixedly connected with the crushing box (1) and is in an elliptical shape, the crushing box (1) is provided with a discharging port (301) at a lower end of the inclined plate (8), and a middle part is provided with an elliptical through hole.

9. A multipurpose material shredder as claimed in claim 8, wherein, A support is arranged at the feeding port of the top of the crushing box (1), a bearing is arranged in the middle of the support and is rotatably connected with the top end of a rotating shaft (402), the bottom end of the rotating shaft (402) is fixedly connected with the output shaft of a driving motor (401) through a shaft coupling (9), a waterproof cylinder (10) is fixedly arranged at the central hole of the inclined plate (8), the rotating shaft penetrates through the waterproof cylinder (10), and the top of the waterproof cylinder (10) is provided with a sealing ring 14 in interference fit.

10. A multipurpose material shredder as claimed in claim 1, wherein The crushing assembly further comprises a fixed strip (4052) fixedly arranged on the inner wall of the crushing box (1), the fixed strip (16) is connected to the crushing box (1) respectively, a middle part is provided with a round hole, the round hole is rotatably connected with the rotating shaft (402) through a bearing, and the surface of the fixed strip (16) is provided with a tooth surface.

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