Rice hull crushing and grinding device

Abstract

The utility model relates to the technical field of crop by-product processing, in particular to a rice hull crushing and grinding device which comprises a shell, a main shaft, a grinding disc, a roller, a scraping plate and a lifting shaft, and the lifting shaft and the main shaft are arranged in the center of the grinding disc in a synchronous bidirectional rotation manner. The rollers and the scrapers are transversely arranged above the grinding disc at intervals around the main shaft, the rollers are rotatably connected with the main shaft along the axis perpendicular to the main shaft, and the scrapers are fixedly connected with the lifting shaft. A gap exists between the shell and the peripheral wall of the grinding disc, and the scraper is provided with a first scraping face arranged in the radial direction of the grinding disc and a second scraping face forming an included angle with the radial direction of the grinding disc. The device is simple in structure and convenient to install. According to the device, material flattening and automatic discharging can be achieved, meanwhile, the situation that ground rice hull powder is dispersed into air to form particulate matter pollution is effectively prevented, collection of the rice hull powder is facilitated, and the device has positive test and production significance.

Description

Technical Field

[0001] The utility model relates to the technical field of crop by-product processing, in particular to a rice husk crushing and grinding device. Background Art

[0002] Rice husk is a major byproduct of rice processing and is a plentiful resource, with my country alone producing approximately 40 million tons annually. However, due to its low nutrient content, high ash content, and high hardness, its utilization is currently low. Most rice husks are discarded as agricultural waste, causing significant pollution and waste. However, rice husks are rich in hemicellulose, lignin, cellulose, and amorphous silica, which can be used to produce a variety of products, including xylose, phenolic resins, alcohol, and nanosilica.

[0003] Currently, the processing of rice husks, an agricultural byproduct, faces the following major challenges: Due to their low bulk density, rice husks require significant space for transportation and storage. To increase their bulk density, rice husks can be ground into a powder. This powder is not only convenient for storage and transportation but also reduces the need for crushing in subsequent processing, improving production efficiency. However, rice husk powder is difficult to collect. During manual collection, it easily dissipates into the air, causing pollution and waste. Furthermore, processing efficiency is low. Utility Model Content

[0004] (1) Technical issues to be solved

[0005] The utility model provides a rice husk crushing and grinding device, which aims to solve the problems of crushing and grinding rice husks and simultaneously solve the problem of collecting and discharging powder after the rice husks are ground.

[0006] (2) Technical solution

[0007] In order to achieve the above-mentioned purpose, the utility model provides a rice husk crushing and grinding device, which includes a shell and a main shaft, a grinding disc, a roller, a scraper and a lifting shaft located therein.

[0008] The lifting shaft is slidably disposed within the main shaft, and the two are synchronously rotatable in both directions, and are located at the center of the grinding disc. The roller and the scraper are disposed above the grinding disc, spaced laterally around the main shaft. The roller is rotatably connected to the main shaft along an axis perpendicular to the main shaft, and is capable of crushing the rice husks on the grinding disc during rotation. The scraper is fixedly connected to the lifting shaft. A gap is formed between the outer shell and the outer peripheral wall of the grinding disc. The scraper has a first scraping surface arranged radially along the grinding disc, and a second scraping surface arranged at an angle to the radial direction of the grinding disc.

[0009] The first scraping surface is used to scrape the rice husks on the grinding disc flat when the main shaft rotates along the first direction and the scraper is lifted and moved to a corresponding height; the second scraping surface is used to push the rice husk powder on the grinding disc into the gap for discharge when the main shaft rotates along the second direction and the scraper is lifted and moved to the upper surface of the grinding disc.

[0010] A further technical solution is to further include a support assembly, by which the grinding disc is supported within the housing. The support assembly comprises a bracket and a barrel-shaped support platform fixed above the bracket. The barrel-shaped support platform is open upward, and its top supports and connects to the grinding disc. A drive motor is fixedly mounted on the upper center surface of its inner bottom, and the output end of the drive motor is drivingly connected to the spindle.

[0011] A further technical solution is that a slide groove is provided at the center of the main shaft along the axial direction of the main shaft, the lifting shaft is set up and down in the slide groove, the top of the lifting shaft is connected to the output end of the driving cylinder located above the main shaft, and an elastic part is provided between the bottom of the lifting shaft and the bottom surface of the slide groove.

[0012] A further technical solution is that a slot is provided on the main shaft along the radial direction of the main shaft, and a connecting hole is provided on the lifting shaft at a position corresponding to the slot. The paired scrapers are connected by a connecting rod, and the connecting rod is inserted into the connecting hole.

[0013] A further technical solution is that the roller is connected to the main shaft via a roller, and the roller is perpendicular to the main shaft.

[0014] A further technical solution is that an end cover is provided at the top end of the main shaft, and the top of the end cover is supported and connected to the driving cylinder by a number of support rods. The output end of the driving cylinder passes through the center of the end cover and is connected to the lifting shaft. An umbrella-shaped diversion protective cover is also provided on the top of the driving cylinder.

[0015] A further technical solution is that the edge of the grinding disc is provided with an annular edge extending downward, the gap is formed between the annular edge and the inner wall of the outer shell, and a spindle mounting hole is provided at the center of the grinding disc, and the spindle can be rotatably mounted in the spindle mounting hole.

[0016] A further technical solution is that the shell has a conical top, a barrel-shaped middle part and a funnel-shaped bottom, the upper part of the conical top is provided with a feed port, the barrel-shaped middle part is coaxial with the grinding disc, and the lower part of the funnel-shaped bottom is provided with a discharge port.

[0017] A further technical solution is that the radius of the maximum circle swept by the scraper is equal to the radius of the grinding disk, the angle between the second scraping surface and the radial direction of the grinding disk is 6-15°, and the outer ends of the first scraping surface and the second scraping surface are connected.

[0018] A further technical solution is to provide rolling patterns on the upper surface of the grinding disc and the outer cylindrical surface of the roller.

[0019] (3) Beneficial effects

[0020] The beneficial effects of the utility model are:

[0021] In the rice husk crushing and grinding device proposed by the utility model, the rice husks are crushed into finer rice husk powder by the rollers rolling on the grinding disc. This rice husk powder has a greater bulk density than rice husks, making it more convenient to transport and store. When the main shaft rotates along the first direction, the first scraping surface of the scraper can flatten the rice husks, and when the main shaft rotates along the second direction, the second scraping surface of the scraper can push the rice husk powder into the gap for unloading. The device can realize automatic unloading, thereby improving processing efficiency. At the same time, the entire crushing process of the device is carried out in the outer shell, which effectively prevents the crushed fine rice husk powder from diffusing into the air to form particulate pollution, and is conducive to the collection of rice husk powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 for Figure 1 A schematic diagram of the three-dimensional structure of the rice husk crushing and grinding device of the embodiment shown, with the outer shell removed;

[0023] Figure 2 This is a main cross-sectional view of a rice husk crushing and grinding device in one embodiment;

[0024] Figure 3 Schematic diagram of the three-dimensional structure of the scraper and connecting rod assembly;

[0025] Figure 4 for Figure 1 A magnified schematic diagram of point B in the middle;

[0026] Figure 5 for Figure 2 Enlarged schematic diagram of point A in the middle.

[0027] [Description of Reference Numerals]

[0028] 1: Spindle; 2: Grinding disc; 3: Roller; 4: Scraper; 5: Housing; 6: Lifting shaft; 7: Gap; 8: Support assembly; 9: Drive motor; 10: Drive cylinder;

[0029] 11: chute; 12: notch; 13: end cover; 14: support rod; 15: diverter protection cover;

[0030] 21: Annular edge; 22: Spindle mounting hole;

[0031] 31: roller;

[0032] 41: first scraping surface; 42: second scraping surface; 43: connecting rod;

[0033] 51: conical top; 52: barrel-shaped middle; 53: funnel-shaped bottom; 511: feed port; 531: discharge port;

[0034] 61: connection hole;

[0035] 81: bracket; 82: barrel-shaped support platform; DETAILED DESCRIPTION

[0036] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation methods in conjunction with the accompanying drawings.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0039] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0040] This embodiment provides a rice husk crushing and grinding device, referring to Figure 1 and Figure 2 As shown, the rice husk crushing and grinding device includes a shell 5 and a main shaft 1, a grinding disc 2, a roller 3, a scraper 4 and a lifting shaft 6 located therein.

[0041] The lifting shaft 6 is slidably arranged in the main shaft 1, and the lifting shaft 6 and the main shaft 1 can rotate synchronously in both directions and are arranged at the center of the grinding disc 2, that is, the lifting shaft 6 and the main shaft 1 can move synchronously in the first direction or the second direction.

[0042] The rollers 3 and scrapers 4 are arranged above the grinding disc 2 at intervals around the main shaft 1. The rollers 3 are rotatably connected to the main shaft 1 along an axis perpendicular to the main shaft 1 and can crush the rice husks on the grinding disc 2 when they rotate. The scrapers 4 are fixedly connected to the lifting shaft 6, so that the lifting and rotation of the lifting shaft 6 can simultaneously drive the lifting and rotation of the scrapers 4. However, the connection between the scrapers 4 and the lifting shaft 6 is not limited to whether it is detachable or non-detachable, as long as the linkage state during the above-mentioned movement can be achieved. There is a gap 7 between the outer shell 5 and the outer peripheral wall of the grinding disc 2. Combined Figure 3 As shown, the scraper 4 has a first scraping surface 41 arranged along the radial direction of the grinding wheel 2 and a second scraping surface 42 that forms an angle with the radial direction of the grinding wheel 2 .

[0043] The first scraping surface 41 is used to scrape the rice husks on the grinding disc 2 flat when the main shaft 1 rotates in a first direction and the scraper 4 is raised and lowered to a corresponding height. The second scraping surface 42 is used to push the rice husk powder on the grinding disc 2 into the gap 7 for discharge when the main shaft 1 rotates in a second direction and the scraper 4 is raised and lowered to the upper surface of the grinding disc 2. It should be noted that "rice husks" refers to the material before processing, and "rice husk powder" refers to the material after processing.

[0044] It should be noted here that when the main shaft 1 rotates along the first direction, the first scraping surface 41 of the scraper 4 coincides with the radius of the grinding disc 2, and the rice husks to be crushed will be pushed by the first scraping surface 41 and move tangentially along the radius of the grinding disc 2, and then the rice husks to be crushed will be flattened by the scraper 4, which is more conducive to the crushing of the roller 6. When the main shaft 1 rotates along the second direction and the scraper 4 descends to be close to the grinding disc 2, the second scraping surface 42 of the scraper 4 has an angle with the first scraping surface 41, that is, there is an angle between the second scraping surface 42 and the radius of the grinding disc 2. The crushed rice husk powder will be pushed by the second scraping surface 42 and move tangentially along the second scraping surface 42, and then continuously pushed to the outer edge of the crushing disc 2 for unloading. The above-mentioned device can realize the functions of automatic flattening and automatic unloading, and at the same time, it has a simple structure and is easy to install.

[0045] Combine Figure 1 and Figure 2 As shown, the rice husk crushing and grinding device in this embodiment further includes a support assembly 8 , and the grinding disc 2 is supported inside the shell 5 through the support assembly 8 .

[0046] Specifically, the support assembly 8 includes a bracket 81 and a barrel-shaped support platform 82 fixed above the bracket 81. The barrel-shaped support platform 82 is open upward, and its top supports and connects to the grinding disc 2. The drive motor 9 is fixedly mounted on the upper surface of the center of its inner bottom. The output end of the drive motor 9 is connected to the main shaft 1, which is used to drive the main shaft 1 to rotate, and in turn drives the lifting shaft 6 in the main shaft 1 to rotate together. Of course, in this embodiment, the main shaft 1 drives the lifting shaft 6 to rotate synchronously. In other embodiments, the lifting shaft 6 can also be connected to a power source that drives its rotation, and the lifting shaft 6 can drive the main shaft 1 to rotate synchronously.

[0047] The barrel-shaped support platform 82 here is mainly used to wrap and protect the drive motor 9 to prevent the small particles of rice husk powder from affecting the operation of the drive motor 9. At the same time, the barrel-shaped structure can play a good supporting role.

[0048] Specific, combined Figure 4 and Figure 5 As shown, in this embodiment, a slide groove 11 is provided at the center of the main shaft 1 along the axial direction thereof. A lifting shaft 6 is provided in the slide groove 11 to slide up and down. The top of the lifting shaft 6 is connected to the output end of the driving cylinder 10 located above the main shaft 1. An elastic member is provided between the bottom of the lifting shaft 6 and the bottom surface of the slide groove 11. Preferably, the elastic member is a spring.

[0049] Furthermore, a slot 12 is formed on the main shaft 1 in a radial direction thereof and extends transversely therethrough. A connecting hole 61 is formed on the lifting shaft 6 at a position corresponding to the slot 12. The paired scrapers 4 are connected by a connecting rod 43 which is inserted into the connecting hole 61.

[0050] Furthermore, the roller 3 is connected to the main shaft 1 through the roller 31, and the roller 31 is perpendicular to the main shaft 1 (it should be noted here that the roller 31 needs to have a certain flexibility and can undergo slight deformation along the vertical direction of the axis under the action of external force to adapt to different thicknesses of the crushed material).

[0051] Furthermore, the top of the main shaft 1 is capped with an end cap 13. A plurality of support rods 14 support the drive cylinder 10 from above. The output end of the drive cylinder 10 passes through the center of the end cap 13 and connects to the lifting shaft 6, thereby driving the lifting shaft 6 relative to the main shaft 1. An umbrella-shaped diverter shield 15 is also installed on the top of the drive cylinder 10. The diverter shield 15 is used to evenly distribute the feed material onto the upper surface of the grinding disc 3. At the same time, the diverter shield 15 can reduce the impact of falling rice husks on the drive cylinder 10.

[0052] It should be noted that in order to control the thickness of the material on the grinding disc 3, the present invention provides a scraper 4 that can move up and down, thereby adjusting the thickness of the flattened material. During a process where flattening is not required, the scraper 4 can be raised to the top via the lifting shaft 6. At this time, only the roller 3 is crushing the material on the grinding disc 2.

[0053] Combine Figure 1 and Figure 2 As shown, in this embodiment, the edge of the grinding disc 2 is provided with a downwardly extending annular edge 21, forming a gap 7 between the annular edge 21 and the inner wall of the housing 5. A spindle mounting hole 22 is provided in the center of the grinding disc 2, and the spindle 1 is rotatably mounted in the spindle mounting hole 22. Here, the annular edge 21 has a certain width, which can effectively restrict the direction of the rice husk powder falling, facilitating subsequent collection.

[0054] Reference Figure 1 As shown, in this embodiment, the shell 5 has a conical top 51, a barrel-shaped middle part 52 and a funnel-shaped bottom 53, the upper part of the conical top 51 is provided with a feed port 511, the barrel-shaped middle part 52 is coaxial with the grinding disc 2, and the lower part of the funnel-shaped bottom 53 is provided with a discharge port 531.

[0055] It should be noted that the diameter of the feed opening 511 is smaller than half the diameter of the grinding disc 2, which can effectively prevent the rice husk from entering the gap 7 without being crushed. The funnel-shaped bottom 53 is conducive to the sliding and collection of the powder.

[0056] Reference Figure 1 In this embodiment, the radius of the maximum circle swept by the scraper 4 is equal to the radius of the grinding disc 2. The angle between the second scraping surface 42 and the radial direction of the grinding disc 2 is 11°. The outer ends of the first scraping surface 41 and the second scraping surface 42 are connected. As an optional embodiment, a rolling pattern is provided on the upper surface of the grinding disc 2 and the outer cylindrical surface of the roller 3. This rolling pattern can more effectively crush and grind the rice husks.

[0057] The rice husk crushing and grinding device provided by the present invention operates as follows: After the device is installed, the drive motor 9 is first started. The drive motor 9 rotates forward, driving the main shaft 1 to rotate in a first direction. The main shaft 1 drives the roller 3 to roll on the grinding disc 2 via the roller 31. Simultaneously, the main shaft 1 drives the lifting shaft 6 to rotate synchronously, and the lifting shaft 6 drives the scraper 4 to rotate synchronously via the connecting rod 43.

[0058] Next, the rice husks enter the housing 5 through the feed port 511, then freely fall onto the upper surface of the diverter shield 15 before being dispersed and deposited onto the upper surface of the grinding disc 2. Based on process requirements, the drive cylinder 10 is controlled, and via the output rod, the drive cylinder 10 drives the lifting shaft 6 downward along the chute 12 to the appropriate position, thereby ensuring the gap between the scraper 4 and the grinding disc 2 (i.e., the thickness of the compacted layer). At this point, the first scraping surface 41 of the scraper 4 flattens the material (careful attention should be paid to controlling the feed speed). After compaction reaches a certain level, the drive motor 9 reverses, the main shaft 1 rotates in the second direction, and the drive cylinder 10 continues to push the scraper 4 downward until it is close to the upper surface of the grinding disc 2. At this point, the compacted rice husk powder moves along the second scraping surface 42 of the scraper 4 toward the edge of the grinding disc 2 to the gap 7. The rice husk powder then falls through the gap 7 and reaches the discharge port 531 at the funnel-shaped bottom 53 of the housing 5. The rice husk powder at the discharge port 531 is then collected.

[0059] It should be understood that the above description of the specific embodiments of the present invention is merely for the purpose of illustrating the technical approach and features of the present invention. Its purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. However, the present invention is not limited to the above-described specific embodiments. Any changes or modifications made within the scope of the claims of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A rice husk crushing and grinding device, characterized in that: It comprises a housing (5) and a main shaft (1), a grinding disc (2), a roller (3), a scraper (4) and a lifting shaft (6) located therein; The lifting shaft (6) is slidably arranged in the main shaft (1) and the two can be synchronously rotated in both directions and are arranged at the center of the grinding disc (2); the roller (3) and the scraper (4) are arranged above the grinding disc (2) at intervals around the main shaft (1); the roller (3) is rotatably connected to the main shaft (1) along an axis perpendicular to the main shaft (1) and can crush the rice husks on the grinding disc (2) when it rotates; the scraper (4) is fixedly connected to the lifting shaft (6); there is a gap (7) between the housing (5) and the outer peripheral wall of the grinding disc (2); the scraper (4) has a first scraping surface (41) arranged along the radial direction of the grinding disc (2) and a second scraping surface (42) at an angle to the radial direction of the grinding disc (2); The first scraping surface (41) is used to scrape the rice husks on the grinding disc (2) flat when the main shaft (1) rotates along the first direction and the scraper (4) moves up and down to a corresponding height; and the second scraping surface (42) is used to push the rice husk powder on the grinding disc (2) to the gap (7) for discharge when the main shaft (1) rotates along the second direction and the scraper (4) moves up and down to the upper surface of the grinding disc (2).

2. The rice husk crushing and grinding device according to claim 1, characterized in that: It also includes a support assembly (8), and the grinding disc (2) is supported inside the housing (5) through the support assembly (8); The support assembly (8) comprises a bracket (81) and a barrel-shaped support platform (82) fixed above the bracket (81); the barrel-shaped support platform (82) is open upward, and its top supports and connects to the grinding disc (2); a driving motor (9) is fixedly mounted on the central upper surface of its inner bottom, and the output end of the driving motor (9) is driven and connected to the main shaft (1).

3. The rice husk crushing and grinding device according to claim 1, characterized in that: Along the axial direction of the main shaft (1), a slide groove (11) is provided at the center of the main shaft (1), and the lifting shaft (6) is provided in the slide groove (11) to slide up and down. The top of the lifting shaft (6) is connected to the output end of the driving cylinder (10) located above the main shaft (1), and an elastic member is provided between the bottom of the lifting shaft (6) and the bottom surface of the slide groove (11).

4. The rice husk crushing and grinding device according to claim 3, characterized in that: Along the radial direction of the main shaft (1), a slot (12) is provided on the main shaft (1) and passes through the main shaft (1). A connecting hole (61) is provided on the lifting shaft (6) at a position corresponding to the slot (12). The paired scrapers (4) are connected via a connecting rod (43), and the connecting rod (43) is inserted into the connecting hole (61).

5. The rice husk crushing and grinding device according to claim 3, characterized in that: The roller (3) is connected to the main shaft (1) via a roller (31), and the roller (31) is perpendicular to the main shaft (1).

6. The rice husk crushing and grinding device according to claim 3, characterized in that: The top end of the main shaft (1) is covered with an end cover (13), and the top of the end cover (13) is supported and connected to the driving cylinder (10) through a plurality of support rods (14). The output end of the driving cylinder (10) passes through the center of the end cover (13) and is connected to the lifting shaft (6). The top of the driving cylinder (10) is also provided with an umbrella-shaped diversion protection cover (15).

7. The rice husk crushing and grinding device according to claim 1, wherein: The edge of the grinding disc (2) is provided with an annular edge (21) extending downward, and the gap (7) is formed between the annular edge (21) and the inner wall of the housing (5). The center of the grinding disc (2) is provided with a spindle mounting hole (22), and the spindle (1) is rotatably mounted in the spindle mounting hole (22).

8. The rice husk crushing and grinding device according to claim 1, wherein: The housing (5) has a conical top (51), a barrel-shaped middle portion (52) and a funnel-shaped bottom (53); a feed port (511) is provided at the upper portion of the conical top (51); the barrel-shaped middle portion (52) is coaxial with the grinding disc (2); and a discharge port (531) is provided at the lower portion of the funnel-shaped bottom (53).

9. The rice husk crushing and grinding device according to claim 1, wherein: The radius of the maximum circle swept by the scraper (4) during rotation is equal to the radius of the grinding disc (2), the angle between the second scraping surface (42) and the radial direction of the grinding disc (2) is 6-15 degrees, and the outer ends of the first scraping surface (41) and the second scraping surface (42) are connected.

10. The rice husk crushing and grinding device according to claim 1, wherein: The upper surface of the grinding disc (2) and the outer cylindrical surface of the roller (3) are provided with rolling patterns.

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