A rice vibrating sieving device

Abstract

This invention provides a rice vibrating sieving device, comprising a rigid frame, a housing connected to the rigid frame via an elastic support mechanism, and a drive mechanism fixed outside the housing for driving the housing to generate high-frequency linear vibration. Multiple sets of parallel and inclined sieve plates are fixed inside the housing, with the sieve aperture size gradually decreasing from top to bottom. Each sieve plate has a grading outlet extending from the side of the housing at its lower end, and a grading outlet is also provided at the bottom of the housing. Each sieve plate has a self-cleaning mechanism on its bottom surface. A guide plate is also provided between adjacent sieve plates, extending from the discharge end of the upper sieve plate to the feed end of the lower sieve plate. The guide plate also has an air jet tumbling mechanism. This sieving device effectively prevents sieve aperture clogging, improves material distribution and tumbling, and increases sieving efficiency.

Description

Technical Field

[0001] This utility model relates to the field of grain processing machinery technology, and in particular to a rice vibrating screening device. Background Technology

[0002] During rice processing, rice needs to be graded according to particle size to separate whole rice, broken rice, and bran, thereby improving product quality and market value. Vibrating screens are commonly used grading equipment; they use vibration to move materials on the screen surface, allowing particles smaller than the screen openings to pass through, thus achieving grading.

[0003] Rice contains fine particles such as bran and starch that are easy to stick to the screen. These particles can easily clog the screen holes during the vibrating screening process, especially when the humidity is slightly higher. This can lead to a decrease in screening efficiency, requiring frequent shutdowns for cleaning and affecting continuous production. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a rice vibrating sieving device with high sieving efficiency, good anti-clogging effect, and high grading accuracy.

[0005] According to an embodiment of this utility model, a rice vibrating sieving device includes a rigid frame, a housing connected to the rigid frame via an elastic support mechanism, and a drive mechanism fixed outside the housing for driving the housing to generate high-frequency linear vibration. Multiple sets of parallel and inclined sieve plates are fixed inside the housing. The sieve aperture size of the multiple sieve plates gradually decreases from top to bottom. Each sieve plate has a grading outlet extending from the side of the housing at its lower end. The bottom of the housing also has a grading outlet. Each sieve plate has a self-cleaning mechanism on its bottom surface. A guide plate is also provided between two adjacent sieve plates, extending from the discharge end of the upper sieve plate to the feed end of the lower sieve plate. The guide plate also has an air jet tumbling mechanism.

[0006] Preferably, the self-cleaning mechanism includes a barrier net fixed below the sieve plate and a plurality of elastic cleaning balls disposed between the barrier net and the sieve plate, wherein the mesh size of the barrier net is larger than the corresponding sieve hole size of the sieve plate.

[0007] More preferably, the elastic unblocking ball is connected to the barrier net by an elastic rope, and a plurality of the elastic unblocking balls are evenly distributed on the surface of the barrier net.

[0008] More preferably, the jet tumbling mechanism includes a plurality of jet holes disposed on the guide plate, an air delivery cavity fixed to the bottom of the guide plate and communicating with the jet holes, and an air delivery pipe communicating with the air delivery cavity and penetrating the side wall of the housing.

[0009] More preferably, each of the gas pipelines is equipped with an independent control valve.

[0010] More preferably, the jet hole has an acute angle with the plane of the sieve plate and is inclined toward the lower side of the guide plate.

[0011] More preferably, a partition perpendicular to the adjacent two sieve plates is fixedly connected between them, and each partition plate is provided with an exhaust grille corresponding to the jet tumbling mechanism, and an exhaust pipe extending to the outside of the box is connected to the exhaust grille.

[0012] In a further preferred embodiment, the top of the housing is provided with a feeding hopper communicating with its interior, the bottom of the feeding hopper is provided with a cylindrical feeding cavity, a rotating feeding roller is arranged horizontally inside the feeding cavity, and a flexible shovel is provided on the outer surface of the rotating feeding roller.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] By installing a self-cleaning mechanism with elastic unclogging balls at the bottom of each screen plate, the unclogging balls are driven by the vibration of the equipment to continuously hit the bottom surface of the screen plate, which can effectively prevent and remove screen hole blockage, maintain screening efficiency, and reduce the number of downtime cleanings.

[0015] The guide plate smoothly guides the material to fall, and the air jet tumbling mechanism on the guide plate uses airflow to fully disperse and tumble the material during the fall, making it easier for small particles to be exposed and contact the screen surface, which significantly improves the classification accuracy and efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a rice vibrating sieving device according to the present invention.

[0017] Figure 2 This utility model Figure 1 A magnified schematic diagram of part A in the middle.

[0018] In the above attached figures: 1. Rigid frame; 2. Box body; 201. Feed hopper; 202. Feed chamber; 203. Rotating feed roller; 204. Flexible feed plate; 3. Screen plate; 4. Grading outlet; 5. Self-cleaning mechanism; 501. Barrier net; 502. Elastic unblocking ball; 503. Elastic rope; 6. Guide plate; 7. Air jet tumbling mechanism; 701. Air jet hole; 702. Air delivery cavity; 703. Air delivery pipe; 704. Control valve; 8. Partition plate; 801. Exhaust grille; 802. Exhaust pipe. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0020] This utility model provides an embodiment, such as Figure 1 As shown, a rice vibrating sieving device includes a rigid frame 1, a box 2 connected to the rigid frame 1 via an elastic support mechanism, and a drive mechanism fixed to the outside of the box 2 for driving the box 2 to generate high-frequency linear vibration. Multiple sets of parallel and inclined sieve plates 3 are fixed inside the box 2. The sieve aperture size of the multiple sieve plates 3 gradually decreases from top to bottom. The uppermost sieve plate 3 is used to remove large impurities or separate extra-large particles, the middle layer is used to separate whole rice and larger broken rice, and the lowermost layer is used to separate fine broken rice and bran. Each sieve plate 3 has a grading outlet 4 extending from the side of the box 2 at its lower end for discharging the material on that layer. The bottom of the box 2 also has a grading outlet 4 for discharging the finest sieved material.

[0021] Each of the sieve plates 3 is provided with a self-cleaning mechanism 5 on its bottom surface, which cleans the mesh of the sieve plate 3 when the box body 2 vibrates.

[0022] A guide plate 6 is provided between two adjacent screen plates 3. The guide plate 6 extends from the discharge end of the upper screen plate 3 to the feed end of the lower screen plate 3. The guide plate 6 receives the material falling from the upper screen plate 3 and guides it to slide smoothly to the starting end of the lower screen plate 3, reducing the accumulation and splashing caused by the material directly impacting the lower screen plate 3.

[0023] The guide plate 6 is also equipped with a jet tumbling mechanism 7, which is used to accelerate the tumbling of materials and is beneficial to the screening work.

[0024] Specifically, such as Figure 2 As shown, the self-cleaning mechanism 5 includes a barrier net 501 fixed below the screen plate 3 and a plurality of elastic unblocking balls 502 disposed between the barrier net 501 and the screen plate 3. The mesh size of the barrier net 501 is larger than the corresponding screen hole size of the screen plate 3. When the box 2 vibrates, the elastic unblocking balls 502 will generate irregular jumping and swinging, continuously hitting the bottom surface of the screen plate 3, thereby shaking off or pushing out the material particles blocked in the screen holes, realizing dynamic and continuous self-cleaning.

[0025] In order to ensure the cleaning effect of each position of the sieve plate 3 and prevent the elastic cleaning balls 502 from piling up, in a further embodiment, the elastic cleaning balls 502 are connected to the barrier net 501 by elastic ropes 503, and a number of the elastic cleaning balls 502 are evenly distributed on the surface of the barrier net 501.

[0026] Specifically, such as Figure 2As shown, the jet tumbling mechanism 7 includes a plurality of jet holes 701 disposed on the guide plate 6, an air delivery cavity 702 fixed to the bottom of the guide plate 6 and communicating with the jet holes 701, and an air delivery pipe 703 communicating with the air delivery cavity 702 and penetrating the side wall of the housing 2. An air compressor is connected to the outside of the air delivery pipe 703.

[0027] Since the materials on different guide vanes 6 are of different sizes, in order to improve adaptability, in a further embodiment, each of the air pipes 703 is provided with an independent control valve 704 for adjusting the jet volume of that layer of guide vanes 6.

[0028] To ensure the tumbling effect, in a further embodiment, the jet hole 701 has an acute angle with the plane of the sieve plate 3 and is inclined toward the lower side of the guide plate 6.

[0029] When compressed air is ejected from the jet hole 701, it will generate an inclined blowing force on the material sliding on the guide plate 6, causing the material to be blown apart and rolled before falling. This helps to expose the fine particles wrapped inside the material or attached to the surface, making it easier to pass through the screen in the subsequent screening process and improving the classification accuracy.

[0030] In order to control the airflow and dust brought by the jet, in a further embodiment, a partition 8 perpendicular to the adjacent two sieve plates 3 is fixedly connected between them. Each partition 8 is provided with an exhaust grille 801 corresponding to the jet tumbling mechanism 7. An exhaust pipe 802 extending to the outside of the box 2 is connected to the exhaust grille 801. An exhaust fan is connected to the outside of the exhaust pipe 802.

[0031] The injected airflow and the dust raised can be discharged in time through the exhaust grille 801 and the exhaust pipe 802 to prevent the dust from escaping from the gaps due to excessive pressure inside the box 2, and at the same time play an auxiliary role in dust removal.

[0032] In order to feed the material onto the screen plate 3 at a uniform speed, in a further embodiment, the top of the box 2 is provided with a feeding hopper 201 communicating with its interior, and the bottom of the feeding hopper 201 is provided with a cylindrical feeding cavity 202. A rotating feeding roller 203 is arranged horizontally inside the feeding cavity 202. A power motor is provided outside the feeding hopper 201 to drive the rotating feeding roller 203 to rotate. The outer surface of the rotating feeding roller 203 is provided with flexible shovels 204. The material falls from the feeding hopper 201 into the feeding cavity 202, and the rotating feeding roller 203 uses the flexible shovels 204 to evenly and gently spread the material onto the top screen plate 3, avoiding concentrated impact and uneven initial distribution of the material.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A rice vibrating sieving device, comprising a rigid frame (1), a housing (2) connected to the rigid frame (1) via an elastic support mechanism, and a drive mechanism fixed to the outside of the housing (2) for driving the housing (2) to generate high-frequency linear vibration, characterized in that, The box (2) is fixed with multiple sets of parallel and inclined screen plates (3). The screen hole size of the multiple screen plates (3) gradually decreases from top to bottom. Each screen plate (3) has a grading outlet (4) extending from the side of the box (2) at its lower end. The bottom of the box (2) is also provided with a grading outlet (4). The bottom surface of each screen plate (3) is provided with a self-cleaning mechanism (5). A guide plate (6) is also provided between two adjacent screen plates (3). The guide plate (6) extends from the discharge end of the upper screen plate (3) to the feed end of the lower screen plate (3). The guide plate (6) is also provided with a jet tumbling mechanism (7).

2. The rice vibrating sieving device according to claim 1, characterized in that, The self-cleaning mechanism (5) includes a barrier net (501) fixed below the sieve plate (3) and a plurality of elastic cleaning balls (502) disposed between the barrier net (501) and the sieve plate (3). The mesh size of the barrier net (501) is larger than the mesh size of the corresponding sieve plate (3).

3. The rice vibrating sieving device according to claim 2, characterized in that, The elastic unblocking ball (502) is connected to the barrier net (501) by an elastic rope (503), and a plurality of the elastic unblocking balls (502) are evenly distributed on the surface of the barrier net (501).

4. The rice vibrating sieving device according to claim 3, characterized in that, The jet tumbling mechanism (7) includes a plurality of jet holes (701) provided on the guide plate (6), an air delivery cavity (702) fixed to the bottom of the guide plate (6) and communicating with the jet holes (701), and an air delivery pipe (703) communicating with the air delivery cavity (702) and penetrating the side wall of the box body (2).

5. A rice vibrating sieving device according to claim 4, characterized in that, Each of the gas pipelines (703) is equipped with an independent control valve (704).

6. The rice vibrating sieving device according to claim 4, characterized in that, The jet hole (701) has an acute angle with the plane of the sieve plate (3) and is inclined toward the lower side of the guide plate (6).

7. A rice vibrating sieving device according to claim 4, characterized in that, A partition (8) perpendicular to each other is fixedly connected between two adjacent screen plates (3). Each partition (8) is provided with an exhaust grille (801) corresponding to the jet tumbling mechanism (7). An exhaust pipe (802) extending to the outside of the box body (2) is connected to the exhaust grille (801).

8. A rice vibrating sieving device according to any one of claims 1-7, characterized in that, The top of the box (2) is provided with a feeding hopper (201) communicating with its interior. The bottom of the feeding hopper (201) is provided with a cylindrical feeding cavity (202). A rotating feeding roller (203) is arranged horizontally inside the feeding cavity (202). A flexible pawl (204) is provided on the outer surface of the rotating feeding roller (203).

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