A rotary rice sieve device

Abstract

This invention relates to the field of grain processing machinery technology and discloses a rotary rice sieve device, including a support frame. A screening box is located inside the support frame, and a rotary assembly is connected to the lower exterior of the screening box. A feed inlet is fixedly connected to the top of the screening box, and a material equalization assembly is located inside the feed inlet. The material equalization assembly combs the rice grains through a first air blowing head and lifts rice bran and dust through a second air blowing head. Multiple filter frames and partitions are fixedly connected sequentially from top to bottom inside the screening box. Screening filters are located inside the filter frames. Multiple discharge ports are fixedly connected to the bottom of the screening box. This invention utilizes a high-pressure blower to drive the first air blowing head along the tangential direction of the arc-shaped guide plate to comb the rice grains, ensuring they enter the screening stage evenly. Simultaneously, the second air blowing head tilts upwards to lift rice bran and dust, creating conditions for subsequent collection.

Description

Technical Field

[0001] This invention relates to the field of grain processing machinery technology, and in particular to a rotary rice sieve device. Background Technology

[0002] The rotary rice sieve is a key piece of equipment in the rice processing flow. Its main function is to grade whole rice and broken rice and remove rice bran dust adhering to the surface of rice grains.

[0003] In existing rotary rice sieve devices, material typically falls directly into the feed inlet by gravity. This method easily leads to localized concentration of material flow, resulting in uneven initial load on the screening screen and underutilization of some screen areas, thus affecting the overall screening capacity. Simultaneously, rice bran dust is passively detached during screening due to friction and tumbling between rice grains, dispersing disorderly within the screening box. This dust generation method, occurring only after screening has begun, ensures that dust is distributed throughout the entire device, increasing the likelihood of it re-contacting the finished rice.

[0004] Furthermore, existing technologies typically lack integrated active collection systems for suspended dust generated during the screening process. This results in some dust being carried by airflow into the production workshop, causing air pollution and affecting the health of operators. Another portion of the settled rice bran powder mixes with the graded finished rice or broken rice, not only reducing the purity of the final product but also diminishing the economic value of the rice bran, which could have been recycled as a high-value byproduct, due to impurities.

[0005] Existing equipment also has shortcomings in terms of cleaning and preventing clogging of the screens. Relying solely on the rotation of the screening box or a single mode of mechanical vibration is insufficient to effectively remove fine rice bran particles embedded in the screen holes. As operating time increases, screen clogging gradually worsens, directly reducing screening efficiency and processing capacity, and requiring periodic shutdowns for manual cleaning, thus affecting the continuity of production.

[0006] Therefore, developing a rotary rice screen device that can improve feed uniformity, actively control and collect dust, and increase screening efficiency is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0007] The purpose of this invention is to provide a rotary rice sieve device that solves the problems of uneven material feeding leading to reduced sieving efficiency, rice bran dust dispersion inside the equipment, and easy clogging of the screen affecting production continuity.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a rotary rice sieve device, comprising a support frame, a screening box inside the support frame, a rotary assembly connected to the lower side of the screening box, a feed inlet fixedly connected to the top of the screening box, a material equalization assembly inside the feed inlet, the material equalization assembly combing the rice grains through a first air blowing head and lifting rice bran and dust through a second air blowing head, multiple filter frames and partitions fixedly connected sequentially from top to bottom inside the screening box, a screening filter screen inside the filter frame, multiple discharge ports fixedly connected to the bottom of the screening box, a shaking assembly inside the screening box, a collection assembly inside the screening box, and an auxiliary assembly outside the screening filter screen;

[0009] The material equalization assembly includes a high-pressure blower and an arc-shaped guide plate. The arc-shaped guide plate is fixedly connected to the inner wall of the feed inlet. The high-pressure blower is located outside the feed inlet. An air blowing pipe is fixedly connected to the air outlet of the high-pressure blower. A first branch pipe branches off from the air blowing pipe. Multiple first air blowing heads are connected to the first branch pipe. Multiple second branch pipes also branch off from the air blowing pipe. Multiple second air blowing heads are connected to the second branch pipes.

[0010] Preferably, the shaking assembly includes a bracket, a limiting plate, and multiple rotating rods. The outer side of each rotating rod is rotatably connected to the inside of the screening box. The outer side of the limiting plate is fixedly connected to the outside of the screening box. The outer side of the bracket is fixedly connected to the outside of the screening box. A second motor is fixedly connected to the inner wall of the bracket. A turntable is fixedly connected to the output end of the second motor. A rotating shaft is fixedly connected to the outer edge of the turntable. A rack is slidably connected inside the limiting plate. A connecting block is fixedly connected to the outer side of the rack. A connecting rod is provided between the connecting block and the rotating shaft. A cam is fixedly connected to one end of each rotating rod. A gear is fixedly connected to the other end of each rotating rod. The gear meshes with the rack.

[0011] Preferably, the auxiliary component includes multiple thin shells, the outer side of which is fixedly connected to the outer side of the screening box, a limiting rod is fixedly connected inside the thin shell, a spring is sleeved on the outer side of the limiting rod, a slider is slidably connected to the outer side of the limiting rod, and an installation rod is fixedly connected to the bottom of the slider.

[0012] Preferably, the collection component includes a centrifugal fan, which is installed outside the support frame. The air inlet of the centrifugal fan is fixedly connected to a connecting pipe. The end of the connecting pipe away from the centrifugal fan is fixedly connected to the clean air outlet of a cyclone separator. The tangential air inlet of the cyclone separator is fixedly connected to a suction pipe. Multiple third branch pipes are connected to the suction pipe, and multiple second filters are provided inside the third branch pipes.

[0013] Preferably, the rotary assembly includes a support frame and a second synchronous pulley. The outer side of the second synchronous pulley is installed at the bottom of the screening box. The outer side of the support frame is fixedly connected to the outer side of the screening box. A first motor is fixedly connected to the inner wall of the support frame. The output end of the first motor is fixedly connected to the first synchronous pulley. The first synchronous pulley and the second synchronous pulley are connected by a synchronous belt. A counterweight is provided on the outer side of the second synchronous pulley. A protective cover is provided on the outer side of the first synchronous pulley.

[0014] Preferably, the first air blowing head blows air along the tangential direction of the arc-shaped guide plate, and the second air blowing head blows air at an upward tilt angle.

[0015] Preferably, one end of the connecting rod is rotatably connected to the outside of the rotating shaft, and the other end of the connecting rod is rotatably connected to the outside of the connecting block.

[0016] Preferably, the mounting rod is fixedly connected to the outside of the screening filter screen, one end of the spring is fixedly connected to the inner top wall of the thin shell, and the other end of the spring is fixedly connected to the top of the slider.

[0017] Preferably, the inner wall of the mounting rod is slidably connected to the outer side of the limiting rod, and the outer side of the slider is slidably connected to the inner wall of the thin shell.

[0018] Preferably, the gear is provided with a protective shell, which is fixedly connected to the outside of the screening box.

[0019] In summary, the present invention has at least one of the following beneficial technical effects:

[0020] 1. This invention utilizes the precise action of high-pressure airflow to effectively comb and pre-remove dust from rice grains before they enter the sieving area. A high-pressure blower in the equalization assembly drives the first air-blowing head to blow airflow along the tangential direction of the arc-shaped guide plate, dispersing and arranging the rice grains to ensure they enter the subsequent sieving stage in a more uniform state. Simultaneously, the second air-blowing head blows airflow at an upward angle, peeling off and lifting the bran and dust adhering to the surface of the rice grains, creating conditions for adsorption by the subsequent collection assembly.

[0021] 2. By introducing an independent rice bran dust collection component, this invention achieves immediate and effective capture of rice bran dust generated inside the screening box. The centrifugal fan creates negative pressure throughout the collection system, drawing in suspended dust from the screening box through the suction pipe and the third branch pipe. The dust is then separated into gas and solid phases by a cyclone separator, removing most of the rice bran dust from the environment at the initial stage of screening. This significantly reduces the dust content in the workshop air and helps maintain the cleanliness of the production environment.

[0022] 3. This invention optimizes the shaking effect of the screening filter screen by coordinating the shaking component and the auxiliary component, thereby improving screening efficiency and reducing the risk of clogging. The second motor in the shaking component drives the rack to reciprocate, and the cam on the gear and rotating rod periodically acts on the screening filter screen. The slider, spring and limit rod in the auxiliary component provide flexible support and restoring force, ensuring that the screening filter screen obtains a stable vibration mode during the shaking process, which helps the screen holes to self-clean and the rice grains to pass through smoothly, thereby improving the material separation efficiency. Attached Figure Description

[0023] Figure 1 This is a perspective view of the present invention;

[0024] Figure 2 This is a schematic diagram of the first synchronous pulley structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the air blowing pipe structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the sieving filter screen structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the third branch pipe structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the rack structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the spring structure of the present invention;

[0030] Figure 8 This is a schematic diagram of the arc-shaped guide plate structure of the present invention.

[0031] The components include: 1. Support frame; 2. Screening box; 3. Protective cover; 4. Support frame; 5. First motor; 6. First synchronous pulley; 7. Second synchronous pulley; 8. Counterweight; 9. Feed inlet; 10. Air blowing pipe; 11. First branch pipe; 12. First air blowing head; 13. Arc-shaped guide plate; 14. Second branch pipe; 15. Second air blowing head; 16. Bracket; 17. Second motor; 18. Turntable; 19. Rotating shaft; 20. Connecting rod; 21. Connecting block. 22. Rack; 23. Limiting plate; 24. Protective shell; 25. Gear; 26. Rotating rod; 27. Cam; 28. Thin shell; 29. ​​Spring; 30. Limiting rod; 31. Slider; 32. Mounting rod; 33. Filter screen frame; 34. Screening filter screen; 35. Partition plate; 36. Discharge port; 37. Centrifugal fan; 38. Connecting pipe; 39. Cyclone separator; 40. Suction pipe; 41. Third branch pipe; 42. Second filter screen; 43. High-pressure fan. Detailed Implementation

[0032] Please see the appendix Figure 1 - Appendix Figure 8 This invention provides a rotary rice sieve device, including a support frame 1, a screening box 2 inside the support frame 1, a rotary component connected to the lower side of the screening box 2, a feed inlet 9 fixedly connected to the top of the screening box 2, a material equalization component inside the feed inlet 9, the material equalization component combs the rice grains through a first air blowing head 12 and blows up rice bran and dust through a second air blowing head 15, multiple filter frames 33 and partitions 35 are fixedly connected from top to bottom inside the screening box 2, a screening filter 34 is provided inside the filter frame 33, multiple discharge ports 36 are fixedly connected to the bottom of the screening box 2, a shaking component is provided inside the screening box 2, a collection component is provided inside the screening box 2, and an auxiliary component is provided outside the screening filter 34.

[0033] The material equalization assembly includes a high-pressure blower 43 and an arc-shaped guide plate 13. The arc-shaped guide plate 13 is fixedly connected to the inner wall of the feed inlet 9. The high-pressure blower 43 is located outside the feed inlet 9. The air outlet of the high-pressure blower 43 is fixedly connected to an air blowing pipe 10. The air blowing pipe 10 branches into a first branch pipe 11. Multiple first air blowing heads 12 are connected to the first branch pipe 11. The air blowing pipe 10 also branches into multiple second branch pipes 14. Multiple second air blowing heads 15 are connected to the second branch pipes 14.

[0034] Specifically, the support frame 1 supports and secures all components of the rotary rice sieve device, providing a stable working platform and ensuring structural integrity during operation. The screening box 2 holds rice grains, rice bran, and dust, and within its internal space, it performs grading, screening, shaking of the rice grains, and raising and collecting of rice bran and dust. The rotary assembly drives the screening box 2 to rotate, causing the rice grains to be evenly distributed, tumble, and effectively separated on the screening screen 34. The feed inlet 9 guides the rice grains to be processed into the internal space of the screening box 2, serving as the initial channel for material entry into the device. The equalization assembly immediately performs preliminary processing on the rice grains upon entry into the screening box 2, achieving uniform material distribution and actively raising rice bran and dust from the surface of the grains, providing optimized conditions for subsequent screening and collection. The first air nozzle 12 sprays airflow to comb and disperse the falling rice grains, ensuring that the rice grains enter the screening area in a more uniform state and distribution, avoiding the impact of initial accumulation on screening efficiency. The second air nozzle 15 is used to spray airflow to peel off and lift the rice bran and dust adhering to the surface of the rice grains, suspending them in the negative pressure environment inside the screening box 2, facilitating adsorption by the collection component. The filter frame 33 is used to fix and support the screening filter 34, ensuring its structural stability under the action of the shaking component and forming a multi-layer screening space. The baffle 35 is used to physically isolate and guide the screening products of different grades inside the screening box 2, ensuring that the graded rice grains can be accurately guided to the corresponding discharge port 36, preventing mixing between different products. The screening filter 34 is used to physically grade the rice grains entering the screening box 2, achieving separation of whole rice and broken rice through screens of different aperture sizes. The discharge port 36 is used to discharge different products after screening and grading, including whole rice and broken rice of different grades. The shaking component is used to apply periodic vibration to the screening filter 34 to improve screening efficiency, prevent screen clogging, and promote uniform movement of rice grains on the screen surface.

[0035] The collecting component generates a negative pressure airflow inside the screening box 2 and sucks away the rice bran dust raised by the equalizing component, achieving centralized capture and separation of dust. The auxiliary component provides elasticity and limiting support for the screening filter 34, ensuring that the screen can obtain a stable and effective vibration mode under the action of the shaking component, thereby improving the screening effect and the screen's self-cleaning ability. The high-pressure blower 43 provides the necessary stable high-pressure airflow to the equalizing component and is the power source for driving the first blowing head 12 and the second blowing head 15. The arc-shaped guide plate 13 guides the falling rice grains and, in conjunction with the airflow from the first blowing head 12, promotes the initial dispersion and homogenization of the rice grains. The blowing pipe 10 transmits the airflow generated by the high-pressure blower 43 to each branch pipe. The first branch pipe 11 distributes the airflow in the blowing pipe 10 to multiple first blowing heads 12. The second branch pipe 14 distributes the airflow in the blowing pipe 10 to multiple second blowing heads 15.

[0036] Please see the appendix Figure 4 and attached Figure 6 The shaking assembly includes a bracket 16, a limiting plate 23, and multiple rotating rods 26. The outer side of the rotating rods 26 is rotatably connected to the inside of the screening box 2. The outer side of the limiting plate 23 is fixedly connected to the outside of the screening box 2. The outer side of the bracket 16 is fixedly connected to the outside of the screening box 2. A second motor 17 is fixedly connected to the inner wall of the bracket 16. A turntable 18 is fixedly connected to the output end of the second motor 17. A rotating shaft 19 is fixedly connected to the outer edge of the turntable 18. A rack 22 is slidably connected inside the limiting plate 23. A connecting block 21 is fixedly connected to the outer side of the rack 22. A connecting rod 20 is provided between the connecting block 21 and the rotating shaft 19. A cam 27 is fixedly connected to one end of the rotating rod 26. A gear 25 is fixedly connected to the other end of the rotating rod 26. The gear 25 is meshed with the rack 22.

[0037] Specifically, bracket 16 provides a stable mounting base and support for the power section of the vibration assembly, ensuring stable operation of the second motor 17 and its subsequent transmission mechanism. Limiting plate 23 provides lateral guidance and limitation for rack 22, ensuring that rack 22 slides accurately along a preset straight trajectory during reciprocating motion, thereby guaranteeing stable meshing between gear 25 and rack 22. Multiple rotating rods 26 serve as the rotation shafts for cam 27 and gear 25, transmitting the rotational motion driven by rack 22 to cam 27, which in turn drives the screening screen 34 to vibrate. The second motor 17 provides the power source for the vibration assembly, converting electrical energy into mechanical energy to drive the subsequent crank-connecting rod mechanism and cam mechanism, enabling the screening screen 34 to achieve the required vibration frequency and amplitude. Turntable 18 converts the rotational motion of the output shaft of the second motor 17 into the periodic oscillation of the connecting rod 20, and is a key rotating component in the crank-connecting rod mechanism. The rotating shaft 19 is used to connect to the connecting rod 20 and serves as the rotation fulcrum of one end of the connecting rod 20. It is fixed to the outer edge of the turntable 18, so that the connecting rod 20 can make circular motion as the turntable 18 rotates.

[0038] The rack 22 converts the oscillation of the connecting rod 20 into its own reciprocating linear motion, and transmits this reciprocating motion to the rotating rod 26 through meshing with the gear 25. The connecting block 21 reliably connects the other end of the connecting rod 20 to the rack 22, ensuring that the oscillation of the connecting rod 20 can efficiently and accurately drive the rack 22 to reciprocate. The connecting rod 20 converts the circumferential motion of the rotating shaft 19 into the reciprocating motion of the connecting block 21, and is the linkage mechanism in the shaking assembly that realizes the conversion of motion form. The cam 27 converts the rotational motion of the rotating rod 26 into periodic impact or push on the screening screen 34, and is the direct actuator for realizing the screen shaking; its shape design determines the specific waveform and frequency of the shaking. The gear 25 meshes with the rack 22, converting the reciprocating linear motion of the rack 22 into the periodic rotational motion of the rotating rod 26, thereby driving the cam 27 to work.

[0039] Please see the appendix Figure 4 and attached Figure 7 The auxiliary components include multiple thin shells 28. The outer side of the thin shell 28 is fixedly connected to the outer side of the screening box 2. The inner side of the thin shell 28 is fixedly connected to a limiting rod 30. A spring 29 is sleeved on the outer side of the limiting rod 30. A slider 31 is slidably connected to the outer side of the limiting rod 30. An installation rod 32 is fixedly connected to the bottom of the slider 31.

[0040] Specifically, multiple thin shells 28 provide protective encapsulation and mounting space for the internal components of the auxiliary assembly. They are fixedly connected to the outside of the screening box 2, ensuring the integration of the auxiliary assembly with the main body while providing a relatively enclosed environment to protect the internal structure. The limiting rod 30 provides a stable sliding guide for the slider 31 and axial support for the spring 29, ensuring that the slider 31 can move smoothly in a preset direction under force and limiting its range of motion. The spring 29 provides elasticity and restoring force to the screening screen 34. When the screening screen 34 is impacted by the shaking component, the spring 29 can absorb some of the impact energy and rebound, thereby achieving flexible support and a stable vibration response. The slider 31 slides on the limiting rod 30, acting as an intermediate connector between the spring 29 and the mounting rod 32, transmitting the elastic force of the spring 29 to the mounting rod 32, thus affecting the stress state of the screening screen 34. The mounting rod 32 is used to directly transmit the elastic support force of the auxiliary component to the screening filter screen 34. Its bottom is fixedly connected to the slider 31 to ensure that the auxiliary component can effectively support and control the screening filter screen 34 to optimize the screen's shaking effect and working status.

[0041] Please see the appendix Figure 4 and attached Figure 5 The collection component includes a centrifugal fan 37, which is installed outside the support frame 1. The air inlet of the centrifugal fan 37 is fixedly connected to a connecting pipe 38. The end of the connecting pipe 38 away from the centrifugal fan 37 is fixedly connected to the clean air outlet of a cyclone separator 39. The tangential air inlet of the cyclone separator 39 is fixedly connected to a suction pipe 40. Multiple third branch pipes 41 are connected to the suction pipe 40. Multiple second filters 42 are provided inside the third branch pipes 41.

[0042] Specifically, the centrifugal fan 37 provides the power source for the entire collection assembly. It creates negative pressure inside the screening box 2 and the suction pipe 40, forcibly drawing suspended rice bran dust into the collection system, making it the core driving device for dust capture. The connecting pipe 38 transmits relatively clean air processed by the cyclone separator 39, guiding it from the clean air outlet of the cyclone separator 39 to the air inlet of the centrifugal fan 37, completing the final airflow delivery and avoiding wear caused by the fan directly handling high-concentration dust. The cyclone separator 39 performs gas-solid separation on the airflow containing rice bran dust. Through the centrifugal force generated by high-speed rotation, it throws out and collects the denser rice bran dust from the airflow, thereby improving exhaust cleanliness and effectively recovering rice bran powder. The suction pipe 40 collects the dust-laden airflow inside the screening box 2 and delivers it to the tangential air inlet of the cyclone separator 39, serving as the main channel for dust to move from the screening box 2 to the separator. Multiple third branch pipes 41 are used to distribute the negative pressure of the suction pipe 40 to different areas inside the screening box 2 to ensure comprehensive and uniform adsorption of rice bran dust and avoid insufficient local collection. The second filter screen 42 is used to perform preliminary filtration of the dust-laden airflow entering the third branch pipes 41 to prevent larger rice bran or impurities from entering the subsequent pipes and cyclone separator 39, protecting downstream equipment from the impact of large particles and improving separation efficiency.

[0043] Please see the appendix Figure 3 The rotating assembly includes a support frame 4 and a second synchronous pulley 7. The outer side of the second synchronous pulley 7 is installed at the bottom of the screening box 2. The outer side of the support frame 4 is fixedly connected to the outer side of the screening box 2. A first motor 5 is fixedly connected to the inner wall of the support frame 4. A first synchronous pulley 6 is fixedly connected to the output end of the first motor 5. The first synchronous pulley 6 and the second synchronous pulley 7 are connected by a synchronous belt. A counterweight 8 is provided on the outer side of the second synchronous pulley 7. A protective cover 3 is provided on the outer side of the first synchronous pulley 6.

[0044] Specifically, the rotary assembly drives the screening box 2 to perform stable rotational motion, thereby achieving uniform distribution and efficient screening of materials on the screening screen 34. The support frame 4 provides a stable mounting foundation and support for the power part of the rotary assembly, ensuring the accurate installation and stable operation of the first motor 5 and its subsequent transmission mechanism. The second synchronous pulley 7 receives the power transmitted by the synchronous belt and directly transmits this rotational motion to the bottom of the screening box 2 to drive the entire screening box 2 to perform a preset rotational motion. The first motor 5 provides the power source for the rotary assembly, converting electrical energy into mechanical rotational energy, and is the core power driving the rotation of the screening box 2. The first synchronous pulley 6 accurately transmits the rotational power of the output shaft of the first motor 5 through the synchronous belt, ensuring synchronous transmission with the second synchronous pulley 7. The synchronous belt establishes a precise power connection between the first synchronous pulley 6 and the second synchronous pulley 7, achieving synchronous, slip-free mechanical energy transmission, ensuring the smoothness and accuracy of the rotation of the screening box 2. The counterweight 8 is used to balance the dynamic unbalanced force generated during the rotation of the screening box 2. By being installed outside the second synchronous pulley 7, it can effectively reduce the vibration during equipment operation, improve operational stability, and extend equipment life. The protective cover 3 is used to cover the first synchronous pulley 6 and its surrounding transmission area to prevent external dust and debris from entering, protect the transmission components from contamination and mechanical damage, and ensure the safety of operators.

[0045] Please see the appendix Figure 1 - Appendix Figure 8 The first air blowing head 12 blows air along the tangent of the arc-shaped guide plate 13, and the second air blowing head 15 blows air at an upward tilt of 15 degrees. One end of the connecting rod 20 is rotatably connected to the outside of the rotating shaft 19, and the other end of the connecting rod 20 is rotatably connected to the outside of the connecting block 21. The outer side of the mounting rod 32 is fixedly connected to the outside of the screening filter screen 34. One end of the spring 29 is fixedly connected to the inner top wall of the thin shell 28, and the other end of the spring 29 is fixedly connected to the top of the slider 31. The inner wall of the mounting rod 32 is slidably connected to the outside of the limiting rod 30, and the outer side of the slider 31 is slidably connected to the inner wall of the thin shell 28. The gear 25 is provided with a protective shell 24, which is fixedly connected to the outside of the screening box 2.

[0046] Specifically, the first air blowing head 12 generates airflow along the tangential direction of the arc-shaped guide plate 13. This airflow in a specific direction is designed to apply a lateral force to the falling rice grains, achieving uniform dispersion and orderly guidance of the material and preventing rice grain accumulation. The second air blowing head 15 generates an upward-sloping airflow at a 15-degree angle. This angled airflow is designed to effectively peel off and lift rice bran and dust adhering to the surface of the rice grains, suspending them inside the screening box 2, providing an easily captured target for the subsequent collection assembly. In the shaking assembly, the rotating connection structure at both ends of the connecting rod 20 is used to convert the circular motion of the rotating shaft 19 into the reciprocating linear motion of the connecting block 21 without interference, and is a key transmission component for realizing the motion form conversion. In the auxiliary assembly, the mounting rod 32 serves as a direct connection between the screening filter screen 34 and the elastic support mechanism, accurately transmitting the support force and reset force provided by the auxiliary assembly to the screening filter screen 34. Spring 29, through its fixed connections at both ends, provides a preset elastic restoring force to the screening screen 34, ensuring that it can quickly rebound after being subjected to the periodic force of the vibration component, forming a stable vibration mode. The sliding connection between the mounting rod 32 and the limiting rod 30, and the sliding connection between the slider 31 and the inner wall of the thin shell 28, together constitute a precision guiding mechanism, used to ensure that the screening screen 34 can move smoothly along a preset trajectory during vibration, avoiding unnecessary lateral or torsional displacement. In addition, the protective shell 24 is used to physically isolate the meshing area of ​​the gear 25, aiming to protect the transmission mechanism from dust corrosion and prevent accidental contact by operators, thereby improving the reliability and safety of equipment operation.

[0047] Working principle: First, the equipment is started. The first motor 5 drives the first synchronous pulley 6 and the second synchronous pulley 7 via a synchronous belt, causing the entire screening box 2 installed inside the support frame 1 to begin rotating. At the same time, the second motor 17 starts, driving the shaking component to work. In addition, the high-pressure blower 43 of the material equalization component and the centrifugal blower 37 of the collection component also start running.

[0048] When rice grains enter the equipment through the top feed inlet 9, they first come into contact with the equalization component. The rice grains fall onto the arc-shaped guide plate 13, at which point the high-pressure blower 43 delivers airflow through the air pipe 10 and the first branch pipe 11. Multiple first air nozzles 12 blow airflow along the tangential direction of the arc-shaped guide plate 13, evenly combing and dispersing the falling rice grains to prevent accumulation. Simultaneously, another airflow from the high-pressure blower 43 is ejected through the second branch pipe 14 from multiple second air nozzles 15 tilted upwards at a 15-degree angle. This airflow actively lifts the rice bran and dust from the surface of the rice grains, suspending them within the internal space of the screening box 2.

[0049] The uniformly processed rice grains tumble within a rotating screening box 2, passing sequentially through three filter frames 33 arranged from top to bottom and their internal screening filters 34. To improve screening efficiency and prevent screen clogging, a vibrating assembly operates continuously. A second motor 17 drives a turntable 18 and a connecting rod 20, converting the rotational motion into the reciprocating linear motion of a rack 22. The rack 22 meshes with a gear 25, driving a rotating rod 26 and a cam 27 at one end to rotate. The cam 27, in conjunction with auxiliary components, periodically acts on the screening filters 34, which are elastically connected via a mounting rod 32 and a spring 29, causing them to vibrate at high frequency, thus achieving efficient screening.

[0050] During the sieving process, the rice bran and dust blown up by the second air blower 15 are sucked away by the rice bran powder and dust collection components. The centrifugal fan 37 generates negative pressure, drawing in the suspended dust in the screening box 2 through the suction pipe 40 and multiple third branch pipes 41. The airflow undergoes preliminary filtration through the second filter screen 42 before entering the suction pipe 40. The dust-containing airflow is then conveyed to the cyclone separator 39, where centrifugal force separates the rice bran dust from the air. The separated rice bran powder is collected, while the relatively clean air is discharged through the connecting pipe 38 and the centrifugal fan 37.

[0051] Finally, after multi-stage screening and shaking separation, the finished rice and broken rice of different grades are guided by the partition 35 and discharged from the four discharge ports 36 at the bottom of the screening box 2, completing the entire screening and bran removal process.

Claims

1. A rotary rice sieve device, characterized in that, include: A support frame (1) is provided inside the support frame (1), a screening box (2) is provided inside the screening box (2), a rotary component is connected to the lower side of the outside of the screening box (2), a feed inlet (9) is fixedly connected to the top of the screening box (2), a material equalization component is provided inside the feed inlet (9), the material equalization component combs the rice grains through the first air blowing head (12) and blows up the rice bran and dust through the second air blowing head (15), a number of filter frames (33) and partitions (35) are fixedly connected inside the screening box (2) from top to bottom, a screening filter (34) is provided inside the filter frame (33), a number of discharge ports (36) are fixedly connected to the bottom of the screening box (2), a shaking component is provided inside the screening box (2), a collection component is provided inside the screening box (2), and an auxiliary component is provided on the outside of the screening filter (34). The material equalization assembly includes a high-pressure blower (43) and an arc-shaped guide plate (13). The arc-shaped guide plate (13) is fixedly connected to the inner wall of the feed inlet (9). The high-pressure blower (43) is located outside the feed inlet (9). The air outlet of the high-pressure blower (43) is fixedly connected to an air blowing pipe (10). The air blowing pipe (10) branches out into a first branch pipe (11). Multiple first air blowing heads (12) are connected to the first branch pipe (11). The air blowing pipe (10) also branches out into multiple second branch pipes (14). Multiple second air blowing heads (15) are connected to the second branch pipes (14).

2. The rotary rice sieve device according to claim 1, characterized in that, The shaking assembly includes a bracket (16), a limiting plate (23), and multiple rotating rods (26). The outer side of the rotating rod (26) is rotatably connected to the inside of the screening box (2). The outer side of the limiting plate (23) is fixedly connected to the outside of the screening box (2). The outer side of the bracket (16) is fixedly connected to the outside of the screening box (2). A second motor (17) is fixedly connected to the inner wall of the bracket (16). A turntable (18) is fixedly connected to the output end of the second motor (17). A rotating shaft (19) is fixedly connected to the outer edge of the turntable (18). A rack (22) is slidably connected inside the limiting plate (23). A connecting block (21) is fixedly connected to the outer side of the rack (22). A connecting rod (20) is provided between the connecting block (21) and the rotating shaft (19). A cam (27) is fixedly connected to one end of the rotating rod (26). A gear (25) is fixedly connected to the other end of the rotating rod (26). The gear (25) meshes with the rack (22).

3. The rotary rice sieve device according to claim 1, characterized in that, The auxiliary component includes multiple thin shells (28), the outer side of which is fixedly connected to the outer side of the screening box (2), a limiting rod (30) is fixedly connected inside the thin shell (28), a spring (29) is sleeved on the outer side of the limiting rod (30), a slider (31) is slidably connected to the outer side of the limiting rod (30), and an installation rod (32) is fixedly connected to the bottom of the slider (31).

4. The rotary rice sieve device according to claim 1, characterized in that, The collection assembly includes a centrifugal fan (37), which is installed outside the support frame (1). The air inlet of the centrifugal fan (37) is fixedly connected to a connecting pipe (38). The end of the connecting pipe (38) away from the centrifugal fan (37) is fixedly connected to the clean air outlet of a cyclone separator (39). The tangential air inlet of the cyclone separator (39) is fixedly connected to a suction pipe (40). Multiple third branch pipes (41) are connected to the suction pipe (40). Multiple second filters (42) are provided inside the third branch pipes (41).

5. A rotary rice sieve device according to claim 1, characterized in that, The rotating assembly includes a support frame (4) and a second synchronous wheel (7). The outer side of the second synchronous wheel (7) is installed at the bottom of the screening box (2). The outer side of the support frame (4) is fixedly connected to the outer side of the screening box (2). A first motor (5) is fixedly connected to the inner wall of the support frame (4). A first synchronous wheel (6) is fixedly connected to the output end of the first motor (5). The first synchronous wheel (6) and the second synchronous wheel (7) are connected by a synchronous belt. A counterweight (8) is provided on the outer side of the second synchronous wheel (7). A protective cover (3) is provided on the outer side of the first synchronous wheel (6).

6. A rotary rice sieve device according to claim 1, characterized in that, The first air blowing head (12) blows out air along the tangential direction of the arc-shaped guide plate (13), and the second air blowing head (15) blows out air at an upward tilt of 15 degrees.

7. A rotary rice sieve device according to claim 2, characterized in that, One end of the connecting rod (20) is rotatably connected to the outside of the rotating shaft (19), and the other end of the connecting rod (20) is rotatably connected to the outside of the connecting block (21).

8. A rotary rice sieve device according to claim 3, characterized in that, The mounting rod (32) is fixedly connected to the outside of the screening filter (34), one end of the spring (29) is fixedly connected to the inner top wall of the thin shell (28), and the other end of the spring (29) is fixedly connected to the top of the slider (31).

9. A rotary rice sieve device according to claim 3, characterized in that, The inner wall of the mounting rod (32) is slidably connected to the outer side of the limiting rod (30), and the outer side of the slider (31) is slidably connected to the inner wall of the thin shell (28).

10. A rotary rice sieve device according to claim 2, characterized in that, The gear (25) is provided with a protective shell (24) on the outside, and the protective shell (24) is fixedly connected to the outside of the screening box (2).

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