A rice screening and impurity removal device for rice processing

Abstract

The present invention discloses a rice grain screening and impurity removal device for rice processing, comprising an impurity removal bin, a pre-screening mechanism, a sealing layer, a support guide plate, a shielding plate, a lifting assembly, a bin body, a buffer assembly, a screening element, a sieve hole, a support rod, a guide plate, a toggle wheel, a contact plate, and a toggle roller. The present invention provides two sets of screening elements inside the impurity removal bin, which can perform left and right position separation screening, thereby reducing the accumulation of rice inside and affecting the impurity removal efficiency. Lifting assemblies are correspondingly installed above the left and right positions and driven by independent cylinders. The driving can block the rice falling from above, perform segmented screening, and effectively avoid excessive accumulation of rice. The rice is screened in the impurity removal bin by a combination of vibration and toggle methods, which has strong stability and effectively improves the efficiency of impurity removal. A shaking pre-screening mechanism is used above the impurity removal bin to shake and pre-screen the rice, eliminating the need for manual pre-screening and improving the efficiency of subsequent screening.

Description

Technical Field

[0001] The present invention relates to the field related to rice processing, and in particular to a rice grain screening and impurity removal device for rice processing. Background Art

[0002] Rice processing refers to the process of processing rice into edible rice products through processes such as husking, husking, screening, grinding, shelling, screening, and polishing. The following is the main process flow of rice processing: Hulling: remove the husk of rice to obtain brown rice with rice husk; Hulling: the brown rice is rubbed and vibrated by a rice husker to remove the husk and rice bran to obtain peeled brown rice; Screening: the peeled brown rice is screened to remove impurities and unqualified rice grains; Milling: the peeled brown rice is milled to remove the rice germ and part of the rice bran to obtain white rice; Hulling: the white rice is hulled to remove the rice bran and a small amount of rice germ to obtain hulled rice; Screening: the hulled rice is screened to remove unqualified rice grains and broken rice; Polishing: the hulled rice after screening is polished to make the surface of the rice grains smoother; Packaging: the polished rice is packaged. Different packaging materials and capacities can be selected to meet different market needs. Rice screening and impurity removal is an important process in rice processing. Its purpose is to remove impurities and unqualified rice grains in rice to ensure the quality of rice and food safety. Special screening and impurity removal equipment is required.

[0003] Chinese Patent: CN202022525976.4 is a rice screening and impurity removal device for rice processing. In view of the shortcomings of the existing rice screening and impurity removal devices for rice processing, which have complex structural designs, cannot screen out iron filings in rice, and discharge dust to pollute the environment, the following scheme is proposed, which includes a box body, a feeding port is provided on the top of the box body, a plurality of vertically arranged magnets are fixedly connected to the interior of the box body, a screen is fixedly connected to the interior of the box body, the screen is located below the magnets, one side of the rice collecting slide is fixedly connected to the interior of the box body, the rice collecting slide is located below the screen, and the other side of the rice collecting slide extends to the outside of the box body, one side of the box body is fixedly connected to an air inlet duct, and the interior of the air inlet duct is fixedly connected to a first motor. The patented structure is reasonably designed, can screen out iron filings in rice, and filters dust in the air, and will not cause pollution to the environment.

[0004] The above patents and prior art have the following problems: in the pre-screening process of rice, manual processing is required, resulting in reduced work efficiency, and the screening position is single, resulting in excessive accumulation at the internal screening position, affecting efficiency and consuming time, and the rice falls in large quantities, aggravating the accumulation problem. Summary of the Invention

[0005] Therefore, in order to solve the above-mentioned shortcomings, the present invention provides a rice processing paddy screening and impurity removal device.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme: a rice grain screening and impurity removal device for rice processing, comprising an impurity removal bin capable of realizing partitioned impurity removal, a pre-screening mechanism being provided at the upper end of the impurity removal bin, the pre-screening mechanism being capable of pre-screening the rice grains;

[0007] The impurity removal bin includes a bin body for protection, the upper inner side of the bin body is connected to the pre-screening mechanism through a sealing layer, the upper inner side of the bin body is provided with a support guide plate for supporting the pre-screening mechanism, through openings are provided at both ends of the support guide plate, and shielding plates are fixed at both ends of the bottom of the support guide plate near the middle, and a lifting component is provided in the middle of the inner side of the bin body for blocking the falling rice.

[0008] Beneficial effects of the present invention:

[0009] The present invention provides two groups of screening elements inside the impurity removal bin, which can perform left and right position separation screening, reduce the accumulation of rice inside, and thus affect the impurity removal efficiency; and correspondingly, lifting components are installed above the left and right positions, which are driven by independent cylinders. The driving can block the rice falling from above, perform segmented screening, and effectively avoid excessive accumulation of rice; vibration and toggling methods are used to screen the rice inside the impurity removal bin, which has strong stability and effectively improves the impurity removal efficiency; a shaking pre-screening mechanism is used above the impurity removal bin, which can shake and pre-screen the rice, without the need for manual pre-screening, and also improves the efficiency of subsequent screening.

[0010] Furthermore, a pre-screening mechanism is provided, wherein the pre-screening mechanism is driven by an independent motor, which can realize that the internal swing mechanism drives the pre-screening frame on the top to swing, thereby screening the rice in the frame, and the outer side of the pre-screening frame is connected to the inner side of the bin body through a flexible sealing layer, so that impurities on the surface can fall into the bin body;

[0011] Furthermore, the setting of the screening element, wherein two groups of screening elements are provided, and the two groups of screening elements are respectively placed at the left and right positions in the bin body to realize two screening positions, which can reduce the accumulation of rice, and the two groups of screening elements are vibrated by the same vibration component, which has strong stability and high screening efficiency;

[0012] Furthermore, a lifting assembly is provided, wherein the lifting assembly has a built-in cylinder, which can drive the swing of the supporting plate, and cooperate with the shielding plate to block the falling rice to adjust the falling speed, or close it for segmented falling screening;

[0013] Furthermore, a toggle wheel is provided, wherein the toggle wheel is driven to rotate by a pulley group, has a built-in toggle blade, and is placed above the sieve hole in the screening element, so as to facilitate toggling during the vibration screening process, thereby improving the impurity removal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1It is a schematic structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the main structure of the pre-screening mechanism of the present invention;

[0016] Figure 3 Schematic diagram of the structure of the pre-screening mechanism of the present invention;

[0017] Figure 4 This is a schematic diagram of the internal structure of the pre-screening mechanism of the present invention;

[0018] Figure 5 It is a structural schematic diagram of the swing mechanism of the present invention.

[0019] Wherein: impurity removal bin 1, pre-screening mechanism 2, sealing layer 2a, support guide plate 3, shielding plate 3a, lifting assembly 4, bin body 11, buffer assembly 12, screening element 13, sieve hole 14, support rod 15, guide plate 16, toggle wheel 17, contact plate 18, toggle roller 19, cover plate 1a, first motor 17a, driving wheel 17b, connecting belt 17c, driven wheel 17d, Driving pulley-19a, second motor-19b, synchronous belt-19c, driven pulley-19d, hinge seat-41, support plate-42, cylinder-43, base plate-21, protective cover-22, pre-screen frame-23, swing mechanism-24, connecting plate-241, follower cylinder-242, connecting plate-243, stabilizing member-244, support rod-245, support arm-246, driving member-247, third motor-248. DETAILED DESCRIPTION

[0020] In order to further explain the technical solution of the present invention, it is described in detail below through specific embodiments.

[0021] See also Figure 1 The present invention provides a rice screening and impurity removal device for rice processing, comprising an impurity removal bin 1 capable of realizing zoning impurity removal, the impurity removal bin 1 comprising a bin body 11, a pre-screening mechanism 2 for pre-screening rice being provided at the upper end of the bin body 11, and pre-processing being performed in a swinging manner, the outer side of the pre-screening mechanism 2 being fixed to the interior of the bin body 11 by a flexible and elastic sealing layer 2a, a supporting guide plate 3 being welded to the upper end of the bin body 11, the supporting guide plate 3 being used to support the pre-screening mechanism 2 and being connected to the pre-screening mechanism 2 at the middle, and openings for rice to pass through being formed at both ends of the supporting guide plate 3, shielding plates 3a being welded obliquely to the left and right positions of the bottom of the supporting guide plate 3, the shielding plates 3a being capable of guiding the falling rice, and a lifting assembly 4 being provided at both ends of the middle of the bin body 11;

[0022] A buffer assembly 12 is installed at the upper middle end of the bin body 11. The buffer assembly is provided with two groups, and the two groups of buffer assemblies are arranged oppositely. The buffer assembly 12 is composed of two groups of round rods and springs directly connected to the round rods. The round rod at the upper end is welded to the bottom of the support guide plate 3, and the bottom of the round rod at the lower end is welded and fixed to the screening member 13. The lower end of the outer side of the screening member 13 is fixed to the inner side of the bin body 11 through a rubber layer, and the screening member 13 is inclined, and a sieve hole 14 is opened at its lower end. A guide plate 16 is welded obliquely at the middle of the bottom end of the screening member 13, and three groups of springs are welded vertically on the inner side of the bottom of the screening member 14. The bottom of the support rod 15 is at the same level, and the bottom of the support rod 15 is fixed to the contact plate 18. The two ends of the bottom of the contact plate 18 are convex, and the bottom of the convex position is against the toggle roller 19. The lower end of the toggle roller 19 is connected with a shaft rod, and the back of the left end shaft rod is connected to the middle of the active pulley 19a. The outer side of the active pulley 19a rotates synchronously with the driven pulley 19d through a synchronous belt 19c. The middle of the driven pulley 19d is connected to the right end shaft rod. A second motor 19b is provided at the lower end of the back of the warehouse body 11, and the front end output shaft of the second motor 19b is connected to the active pulley 19a;

[0023] A toggle wheel 17 is provided at the lower end of the left and right ends of the bin body 11. The toggle wheel 17 is placed below the lifting assembly 4. A shaft is also installed in the middle of the toggle wheel 17. A driving wheel 17b is provided at the rear end of the left shaft. The back of the driving wheel 17b is connected to the output shaft of the first motor 17a installed on the back of the bin body 11. The outer side of the driving wheel 17b rotates synchronously with the driven wheel 17d through a connecting belt 17c. The shaft provided in the middle of the driven wheel 17d is connected to the toggle wheel 17 at the right end.

[0024] Five groups of paddles are provided in the paddle wheel 17 to facilitate uniform paddle movement of the rice.

[0025] There are outlets at the left and right ends of the bottom of the bin body 11, and the top of the outlet corresponds to the sieve hole 14. In addition, cover plates 1a are embedded at the lower ends of the left and right sides of the bin body 11 and placed at the corresponding positions outside the screening element. When opened, impurities inside can be discharged.

[0026] The lifting assembly 4 includes a hinge seat 41 welded and fixed to the inner lower end of the warehouse body 11. The hinge seat 41 is hinged to the support plate 42 inside. The support plate 42 is pointed at the inner lower end. The middle of the bottom end of the support plate 42 is hinged to the output end of the cylinder 43, and the other end of the cylinder 43 is hinged to the inner lower end of the warehouse body 11.

[0027] See also Figure 2-Figure 5The present invention provides a rice grain screening and impurity removal device for rice processing. The pre-screening mechanism 2 includes a bottom plate 21 for supporting and fixed on the top of the support guide plate 3. The top edge of the bottom plate 21 is connected to the bottom of the pre-screening frame 23 through a flexible protective cover 22. The middle of the pre-screening frame 23 is solid, and circular holes are opened at other positions inside it to facilitate screening. The middle of the top of the bottom plate 21 is connected to the middle of the bottom of the pre-screening frame 23 through a swing mechanism 24. The outer side of the pre-screening frame 23 is connected to the inner side of the bin body 11 through a sealing layer 2a.

[0028] The swinging mechanism 24 includes a connecting plate 241 fixed to the top and the middle part of the bottom end of the pre-screen frame 23. The bottom of the connecting plate 241 is locked with the follower cylinder 242 by bolts. The follower cylinder 242 is cross-shaped. The front and rear ends of the follower cylinder 242 are embedded in the interior of the stabilizing member 244 through connecting plates 243. Another connecting plate 243 is embedded in the left and right ends of the stabilizing member 244. The middle part of the connecting plate 243 is connected to the supporting rod 245, and the outer side of the supporting rod 245 is fixed to the support arm 246. The support arm 246 is vertically welded to the top of the base plate 21, and the bottom of the follower cylinder 242 is connected to the driving member 247. The follower cylinder 242 can swing with the driving member 247. The driving member 247 consists of a disc and a tilting block on the outside of the disc. The tilting position is connected to the top of the follower cylinder 242, and the bottom of the disc is connected to the output shaft of the third motor 248. The third motor 248 is installed in the middle of the top of the base plate 21.

[0029] The specific implementation process is as follows:

[0030] When the rice needs to be screened for impurities, it is introduced into the pre-screen frame 23, and then the third motor 248 is started to work. The third motor 248 drives the driving member 247 to rotate, and then the follower cylinder 242 is swung, so that the pre-screen frame 23 connected to the top by the connecting plate 241 is swung to pre-screen the rice inside, so that larger impurities are screened out and the rice falls into the interior of the bin body 11;

[0031] The rice passes through the support guide 3 and then falls onto the top of the supporting plate 42. The cylinder 43 is started to work, and the supporting plate 42 is lowered, so that the rice enters the screening element 13. At this time, the first motor 17a and the second motor 19b are started to work, the driving wheel 17b rotates, and the driven wheel 17d rotates through the connecting belt 17c. The shaft in the middle of the two can drive the toggle wheel 17 to rotate, and the rice begins to be toggled on the screening element 13;

[0032] At the same time, the active pulley 19a rotates, and the driven pulley 19d rotates through the synchronous belt 19c. The shaft inside the two rotates eccentrically with the toggle roller 19, which continuously impacts the top contact plate 18. The screening element 13 is lifted up by the support rod 15, and the spring in the buffer assembly 12 is shaken to make the rice vibrate when it is toggled on the screening element 13, thereby achieving screening. Finally, the rice under the screen can fall to the bottom of the bin body 11 and be discharged from the outlet.

[0033] By controlling the reciprocating motion of the cylinder 43, the support plate can cooperate with the baffle 3a to block the rice to achieve segmented screening, avoiding excessive accumulation at the screening position below. Opening the cover 1a can allow the impurities screened out from the inside to enter and exit.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A rice grain screening and impurity removal device for rice processing, characterized in that: It includes a cleaning bin that can realize zoning cleaning, and a pre-screening mechanism is provided at the upper end of the cleaning bin, which can pre-screen the rice; The impurity removal bin includes a bin body for protection, the upper end of the inner side of the bin body is connected to the pre-screening mechanism through a sealing layer, the upper end of the bin body is provided with a support guide plate for supporting the pre-screening mechanism, the support guide plate has openings at both ends, and shielding plates are fixed at both ends of the bottom of the support guide plate near the middle, and a lifting component is provided in the middle of the inner side of the bin body to block falling rice; The impurity removal bin also includes two groups of buffer assemblies arranged at the upper middle end of the bin body and connected to the bottom of the support guide plate, a screening element arranged at the bottom of the buffer assembly, a sieve hole opened at the lower end of the screening element, a support rod arranged at the bottom of the screening element, a guide plate fixed to the bottom of the screening element and at the inner edge of the sieve hole, a contact plate fixed to the bottom of the support rod, a toggle roller abutting against the bottom of the contact plate, and a toggle wheel arranged at the left and right positions of the lower end of the bin body and placed between the screening element and the lifting assembly, the buffer assembly consists of two groups of round rods and springs directly connected to the round rods, the round rod at the upper end is connected to the bottom of the support guide plate, and the bottom of the round rod at the lower end is fixed to the screening element; The pre-screening mechanism includes a bottom plate for supporting and fixed on the top of the support guide plate, a protective cover provided at the top edge of the bottom plate, a pre-screening frame connected to the other end of the protective cover, and a swing mechanism provided at the middle of the top of the bottom plate and connected to the bottom of the pre-screening frame. The outer side of the pre-screening frame is connected to the upper end of the inner side of the bin body through a sealing layer. The swing mechanism includes a connecting plate arranged in the middle of the bottom end of the pre-screen frame, a follower cylinder arranged in a cross shape at the bottom of the connecting plate, connecting plates arranged at the front and rear ends of the follower cylinder, a fixing member connected to the connecting plates at the front and rear positions and embedded in another set of connecting plates at the left and right positions, a supporting rod arranged on the left and right sides of the fixing member, a support arm fixed to the outer side of the supporting rod and with the bottom fixed to the top of the base plate, a driving member arranged at the bottom of the follower cylinder, and a third motor whose output shaft is connected to the driving member and the bottom is placed on the top of the base plate.

2. The rice processing rice screening and impurity removal device according to claim 1, characterized in that: The sealing layer is flexible and elastic.

3. The rice processing rice screening and impurity removal device according to claim 1, characterized in that: The outer side of the screening element and the inner side of the bin body are connected at a connection position through a rubber layer.

4. The rice processing rice screening and impurity removal device according to claim 3, characterized in that: The lower end of the driving roller is connected to a shaft, the back of the left end shaft is connected to the middle of the driving pulley, the outer side of the driving pulley rotates synchronously with the driven pulley through a synchronous belt, the middle of the driven pulley is connected to the right end shaft, and a second motor is provided at the lower end of the back of the warehouse body, and the front end output shaft of the second motor is connected to the driving pulley; A shaft is installed in the middle of the toggle wheel, and a driving wheel is provided at the rear end of the left shaft. The back of the driving wheel is connected to the output shaft of the first motor installed on the back of the warehouse body. The outer side of the driving wheel rotates synchronously with the driven wheel through a connecting belt, and the shaft set in the middle of the driven wheel is connected to the toggle wheel at the right end.

5. The rice grain screening and impurity removal device for rice processing according to claim 1, characterized in that: The left and right ends of the bottom of the silo are provided with outlets, the tops of the outlets correspond to the sieve holes, and detachable cover plates are embedded in the lower ends of the left and right sides of the silo.

6. The rice grain screening and impurity removal device for rice processing according to claim 1, characterized in that: The middle part of the pre-screening frame is solid, and circular holes for screening are opened at other positions inside the pre-screening frame.

7. The rice grain screening and impurity removal device for rice processing according to claim 1, characterized in that: The driving member consists of a disc and a tilting block outside the disc, the tilting position is connected to the top of the follower cylinder, and the bottom of the disc is connected to the output shaft of the third motor.

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