Rice and brown rice screening system

Abstract

A rice and brown rice screening system comprises a straw cleaning sieve. A screening device is arranged at the output end of the straw cleaning sieve and used for separating rice and brown rice. The screening device comprises a rack, a driving mechanism is arranged on the rack, one end of the driving mechanism is connected with a separation box, and the separation box is arranged on a supporting mechanism; a plurality of fish scale plates are arranged in the separating box, a material receiving box is arranged at a discharging port of the separating box, and at least two discharging channels are formed in the material receiving box through a separating mechanism; a hopper is arranged at a feeding hole of the separation box; the driving mechanism comprises a driving motor fixed to the outer side of the rack, two oppositely-arranged first bearing pedestals are fixed in the rack, a main shaft is installed between the first bearing pedestals through bearings, a synchronous wheel is fixed to one end of the main shaft, a driving wheel is fixed to the output end of the driving motor, and the driving wheel is fixed to the output end of the driving motor. And a synchronous belt is arranged between the driving wheel and the synchronous wheel in a sleeving manner.

Description

Technical Field

[0001] The utility model relates to the technical field of grain processing, in particular to a paddy and brown rice screening system. Background Art

[0002] The screening of paddy and brown rice mainly depends on the differences in their physical properties, such as particle size, relative density, bulk density, and surface friction coefficient. The following are two main screening methods:

[0003] Screening method: This is a separation method that utilizes the difference in particle size between paddy and brown rice and their automatic grading characteristics. By matching the appropriate sieve hole size and using the movement of the sieve surface, the rice-brown mixture is automatically graded on the sieve surface. Paddy with large particle size, low relative density and rough surface floats on the upper layer of the material, while brown rice with small particle size, high relative density and smoother surface sinks to the bottom layer. Brown rice contacts the sieve surface and passes through the sieve holes, becoming the under-sieve material, while paddy is blocked by the brown rice layer and is not easy to pass through the sieve holes, becoming the over-sieve material, thus achieving paddy-brown separation. The commonly used equipment is the paddy-brown separation flat rotary screen.

[0004] Relative density sorting method: This is a method of separation using the difference in relative density between rice and brown rice and their automatic grading characteristics. On the rough working panel that vibrates back and forth, rice and brown rice are separated due to their relative density difference. The rice moves under the action of its own gravity and the thrust of the feed, and is discharged from the lower outlet, thus achieving rice-brown separation. The commonly used equipment is a gravity rice-brown separator.

[0005] The existing screening device is generally a vibrating screen, but due to the limitation of the working principle, the energy consumption of the vibrating screen is relatively high under certain working conditions. Moreover, the vibration will make the material adhere to the screen surface more tightly, causing material congestion or shutdown. In addition, the screening efficiency of the existing rice-rough separator is not high, and it cannot be used well with the straw cleaning screen.

[0006] Patent 202123353606.8 discloses a rice-rough separation screen, including: a separation device, a feed pipe is provided in the separation device, the feed pipe is connected to a uniform material flow plate, the uniform material flow plate is connected to a large miscellaneous screen, the large miscellaneous screen is connected to a uniform material feeding plate, a scraper plate is provided above the uniform material feeding plate, the uniform material feeding plate is connected to a trough, a brown rice trough is provided at the top of the trough, the brown rice trough is connected to a brown rice outlet, the bottom of the trough is connected to a rice trough, the trough is provided with a separation sieve plate, the brown rice trough is provided with a conveyor belt from left to right, and the brown rice outlet is connected to a collecting trough. Under the action of the lateral reciprocating shaking separation sieve plate, the rice-rough mixture gradually produces automatic grading, the brown rice is output from the brown rice trough connected to the trough, and the rice falls directly into the rice trough for collection, so as to achieve the effect of separation by quality. Although this device can also achieve the effect of screening, its efficiency is not high. Utility Model Content

[0007] The utility model aims to overcome the deficiencies of the prior art and provide a rice and brown rice screening system to solve the above-mentioned defects.

[0008] The purpose of this utility model is achieved through the following technical solutions:

[0009] A rice brown rice screening system comprises a straw cleaning screen;

[0010] The output end of the straw cleaning screen is provided with a screening device, which is used to separate paddy and brown rice; the screening device includes a frame, a driving mechanism is provided on the frame, one end of the driving mechanism is connected to a separation box, and the separation box is arranged on a supporting mechanism; a plurality of fish scale plates are arranged in the separation box, a receiving box is arranged at the discharge port of the separation box, and at least two discharge channels are formed in the receiving box through a partition mechanism; a hopper is arranged at the feed port of the separation box.

[0011] In one or more embodiments of the utility model, the driving mechanism includes a driving motor fixed to the outside of a frame, two first bearing seats relatively arranged in opposition are fixed in the frame, a main shaft is installed between the first bearing seats via bearings, a synchronous wheel is fixed to one end of the main shaft, a driving wheel is fixed to the output end of the driving motor, a synchronous belt is sleeved between the driving wheel and the synchronous wheel; two first connecting rocker arms are respectively fixed on the main shaft via first eccentric wheels, a first connecting shaft is fixed between the extending ends of the first connecting rocker arms via bearings, two first connecting bearing seats are fixed on the first connecting shaft via bearings, a connecting frame is fixed to the outer ends of the first connecting bearing seats, and the connecting frame is fixedly connected to the side of the separation box.

[0012] In one or more embodiments of the utility model, two second connecting rocker arms are respectively fixed on the main shaft through the second eccentric wheel, a second connecting shaft is fixed between the extending ends of the second connecting rocker arms through bearings, two second connecting bearing seats are fixed on the second connecting shaft through bearings, a fixing seat is fixed on the outer side of the second connecting bearing seat, and the fixing seat is used to fix the counterweight block; the extension directions of the first connecting rocker arm and the second connecting rocker arm are opposite.

[0013] In one or more embodiments of the utility model, a cross bar is fixed in the frame, two first hinged seats are fixed on the cross bar, a first connecting member is hinged on the first hinged seat, a counterweight support frame is fixed on the first connecting member, and the upper end of the counterweight support frame is fixedly connected to the bottom of the fixed seat.

[0014] In one or more embodiments of the present invention, the supporting mechanism includes two second bearing seats fixed in the frame and arranged opposite to each other, and a long shaft is fixed between the two second bearing seats through bearings, and a plurality of connecting rods are fixed on the long shaft, and an adjusting rod is fixed on the extending end of the connecting rod, and two adjusting plates are fixed on the adjusting rod, and a short shaft is fixed between the extending ends of the adjusting plates, and an adjusting screw is fixed on the short shaft, and two relatively arranged mounting seats are fixed in the frame, and a rotating bearing seat is rotatably arranged between the two mounting seats, and the upper end of the adjusting screw passes through the rotating bearing seat and is fixed with a limiting rod; two second hinged seats are respectively fixed on the long shaft and the adjusting rod, and a rectangular frame is fixed on the second hinged seat through a hinged second connecting seat, and a third hinged seat is fixed on the upper end of the rectangular frame, and a supporting seat is fixed on the third hinged seat through a third connecting piece, and the separation box is fixed on the supporting seat; the bottom of the supporting seat is a horizontal plane, and the upper side thereof is an inclined plane.

[0015] In one or more embodiments of the utility model, the material receiving box is fixed at the discharge end of the separation box, and the separation mechanism includes two relatively arranged third bearing seats fixed on the material receiving box, a rotating shaft is fixed between the two third bearing seats through bearings, a sliding seat is swivel-connected to the rotating shaft, a linear slide rail is fixed to the inner wall of the material receiving box, a movable partition is fixed on the sliding seat and the linear slide rail, and one end of the rotating shaft extends to the outside of the material receiving box and is fixed with an adjusting wheel.

[0016] In one or more embodiments of the utility model, the side surfaces of the separation box in the length direction are openings, which respectively form a feed port and a discharge port. The interior of the separation box is divided into several layers by fish scale plates. Several partitions are fixed to the feed port of the separation box. The partitions are in a bent structure, and their lower ends are respectively connected to the fish scale plates. The hopper is fixed to the upper end of the partition.

[0017] Beneficial effects of the utility model:

[0018] The utility model proposes a paddy brown rice screening system which comprises a straw cleaning screen and a screening device to form a screening system, so that the processing of paddy rice is more automated; through the arrangement of multi-layer fish scale plates, materials can be screened simultaneously in multi-layer spaces, so that efficiency is improved, and thus can be better used in conjunction with the straw cleaning screen, so that the subsequent speed will not be affected; the position of the movable partition is adjusted by a rotating shaft, so that the separation boundary of the discharge channel is easily adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the front view of the utility model;

[0020] Figure 2 It is a rear view of the utility model;

[0021] Figure 3 It is a left view of the utility model;

[0022] Figure 4 It is a cross-sectional view of the utility model;

[0023] Figure 5 It is a top view of the utility model. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0025] Embodiment 1: In this embodiment, Figures 1 to 5 As shown, a paddy and brown rice screening system includes a straw cleaning screen; a screening device is provided at the output end of the straw cleaning screen, and the screening device is used to separate paddy and brown rice; the screening device includes a frame 1, a driving mechanism is provided on the frame 1, one end of the driving mechanism is connected to a separation box 2, and the separation box 2 is arranged on a supporting mechanism; a plurality of fish scale plates 3 are arranged in the separation box 2, and a receiving box 4 is provided at the discharge port of the separation box 2, and at least two discharge channels are formed in the receiving box 4 by a partition mechanism; a hopper 5 is provided at the feed port of the separation box 2.

[0026] The wheat straw cleaning screen adopts the existing technology, which uses the utility model patent with application number CN202021899617.9, which discloses a wheat straw cleaning screen for granary, which is used to solve the problem that the vibrating screen of the existing technology cannot flexibly adjust the tilt angle according to the feeding situation during use, thereby affecting the screening effect. Its structure includes: a support, a screen slot, and a connecting rope. The support is placed on the ground to support the screen slot. The support and the screen slot are rotatably connected. There are multi-level screen plates in the screen slot, and the through holes on the multi-level screen plates are different, so that the ash, straw, and wheat are effectively screened, and the problem of wheat mixed with ash is avoided. In addition, the two ends of the screen slot are connected with the connecting rope, and the connecting rope bypasses the slope motor set on the chassis. The tilt angle of the screen slot is changed by the rotation of the slope motor, and the user can flexibly adjust the tilt angle of the screen slot according to the specific working conditions. The rice straw is screened out through this structure, and then the screened rice flows into the screening device for screening rice and brown rice.

[0027] In this embodiment, the fish scale plate 3 adopts the existing technology, and its specific structure is not repeated here; when the mixture enters the fish scale plate 3, the rice and brown rice begin to separate under the action of the fish scale plate. Due to the different specific gravities of rice and brown rice, the rice and brown rice will separate. Due to gravity and the reciprocating motion of the plate surface, the rice and brown rice will move to the receiving box 4, and then flow to different discharge channels. Through such a physical separation process, the rice and brown rice can be separated according to their quality and flow out separately. A baffle is arranged in the hopper 5, and the baffle is controlled by a motor to control the entry of the material. By setting up multiple layers of fish scale plates 3, the material can be screened simultaneously in multiple layers of space, so as to improve efficiency.

[0028] In one or more embodiments of the utility model, the driving mechanism includes a driving motor 6 fixed to the outside of the frame 1, two relatively arranged first bearing seats 7 are fixed in the frame 1, a main shaft 8 is installed between the first bearing seats 7 through bearings, a synchronous wheel 9 is fixed to one end of the main shaft 8, a driving wheel is fixed to the output end of the driving motor 6, and a synchronous belt is sleeved between the driving wheel and the synchronous wheel 9; two first connecting rocker arms 10 are respectively fixed on the main shaft 8 through the first eccentric wheel, a first connecting shaft 11 is fixed between the extending ends of the first connecting rocker arms 10 through bearings, two first connecting bearing seats 12 are fixed on the first connecting shaft 11 through bearings, a connecting frame 13 is fixed to the outer end of the first connecting bearing seat 12, and the connecting frame 13 is fixedly connected to the side of the separation box 2.

[0029] In one or more embodiments of the utility model, two second connecting rocker arms 14 are respectively fixed on the main shaft 8 through the second eccentric wheel, a second connecting shaft 15 is fixed between the extending ends of the second connecting rocker arms 14 through bearings, two second connecting bearing seats are fixed on the second connecting shaft 15 through bearings, a fixing seat 16 is fixed on the outer side of the second connecting bearing seat, and the fixing seat 16 is used to fix the counterweight block; the extension direction of the first connecting rocker arm 10 is opposite to that of the second connecting rocker arm 14.

[0030] In this embodiment, the first connecting rocker arm 10 is driven by the driving motor 6, so that the separation box 2 moves along the motion trajectory of the first connecting rocker arm 10, and the vibration trajectory and amplitude of the screening machine are adjusted by the counterweight block to achieve an ideal screening effect. By changing the mass distribution on both sides of the driving mechanism, the counterweight block can affect the vibration characteristics of the screening machine, thereby optimizing the screening process and improving the screening efficiency.

[0031] In one or more embodiments of the utility model, a cross bar is fixed inside the frame 1, two first hinged seats 17 are fixed on the cross bar, a first connecting member is hinged on the first hinged seat 17, a counterweight support frame 18 is fixed on the first connecting member, and the upper end of the counterweight support frame 18 is fixedly connected to the bottom of the fixed seat 16.

[0032] In this embodiment, the first connecting member is hinged so that the counterweight support frame 18 can follow the movement while supporting the fixing seat 16 and the counterweight block.

[0033] In one or more embodiments of the utility model, the support mechanism includes two second bearing seats 19 fixed in the frame 1 and arranged oppositely, and a long shaft 20 is fixed between the two second bearing seats 19 through a bearing, and a plurality of connecting rods 21 are fixed on the long shaft 20, and an adjusting rod 22 is fixed on the extending end of the connecting rod 21, and two adjusting plates 23 are fixed on the adjusting rod 22, and a short shaft 24 is fixed between the extending ends of the adjusting plates 23, and an adjusting screw 25 is fixed on the short shaft 24, and two relatively arranged mounting seats are fixed in the frame 1. 26, a rotating bearing seat 27 is rotatably arranged between the two mounting seats 26, the upper end of the adjusting screw 25 passes through the rotating bearing seat 27 and is fixed with a limiting rod 28; two second hinged seats are respectively fixed on the long axis 20 and the adjusting rod 22, a rectangular frame is fixed on the second hinged seat through a hinged second connecting seat, a third hinged seat is fixed on the upper end of the rectangular frame, a supporting seat 29 is fixed on the third hinged seat through a third connecting member, and the separation box 2 is fixed on the supporting seat 29; the bottom of the supporting seat 29 is a horizontal plane, and the upper side thereof is an inclined plane.

[0034] In this embodiment, the separation box 2 is supported by the support mechanism and can move with it, so that the support mechanism does not affect the operation of the separation box 2. The bottom of the support seat 29 is a horizontal surface, and the upper side is an inclined surface, so that the separation box 2 is installed in an inclined manner, which is convenient for discharging. The structures of the first connecting member, the second connecting member and the third connecting member are consistent, and they include

[0035] In one or more embodiments of the utility model, the material receiving box 4 is fixed to the discharge end of the separation box 2, and the separation mechanism includes two relatively arranged third bearing seats fixed on the material receiving box 4, and a rotating shaft is fixed between the two third bearing seats through bearings, and a sliding seat is swivel-connected to the rotating shaft, and a linear slide rail is fixed to the inner wall of the material receiving box 4, and a movable partition 30 is fixed on the sliding seat and the linear slide rail, and one end of the rotating shaft extends to the outside of the material receiving box 4 and is fixed with an adjusting wheel 31.

[0036] In this embodiment, due to the difference in the fish scale plates 3 or the mixture, the screening effect of the material will be different. The position of the movable partition 30 is adjusted by the rotating shaft, so that the separation boundary of the discharge channel can be adjusted easily.

[0037] In one or more embodiments of the utility model, the side surfaces of the separation box 2 in the length direction are open, which respectively form a feed port and a discharge port. The interior of the separation box 2 is divided into several layers by fish scale plates 3. Several partitions 32 are fixed to the feed port of the separation box 2. The partitions 32 are bent structures, and the lower ends thereof are respectively connected to the fish scale plates 3. The hopper 5 is fixed to the upper ends of the partitions 32.

[0038] In this embodiment, the bent partition plate 32 is arranged so that the material in the hopper can enter each fish scale plate 3 for multi-layer screening.

[0039] Working principle of this utility model:

[0040] The rice straw is screened out through a straw cleaning screen, and then the screened rice flows into a screening device for screening the rice and brown rice.

[0041] In the description of the present utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "connection" and the like should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

Claims

1. A rice brown rice screening system, comprising a straw cleaning screen, characterized in that: The output end of the straw cleaning screen is provided with a screening device, which is used to separate paddy and brown rice; the screening device comprises a frame (1), the frame (1) is provided with a driving mechanism, one end of the driving mechanism is connected to a separation box (2), and the separation box (2) is arranged on a supporting mechanism; a plurality of fish scale plates (3) are arranged in the separation box (2), a material receiving box (4) is arranged at the discharge port of the separation box (2), and at least two discharge channels are formed in the material receiving box (4) through a partition mechanism; and a hopper (5) is arranged at the feed port of the separation box (2).

2. A paddy brown rice screening system according to claim 1, characterized in that: The driving mechanism comprises a driving motor (6) fixed to the outside of a frame (1); two first bearing seats (7) arranged opposite to each other are fixed in the frame (1); a main shaft (8) is mounted between the first bearing seats (7) via bearings; a synchronous wheel (9) is fixed to one end of the main shaft (8); a driving wheel is fixed to the output end of the driving motor (6); a synchronous belt is sleeved between the driving wheel and the synchronous wheel (9); two first connecting rocker arms (10) are respectively fixed to the main shaft (8) via first eccentric wheels; a first connecting shaft (11) is fixed between the extended ends of the first connecting rocker arms (10) via bearings; two first connecting bearing seats (12) are fixed to the first connecting shaft (11) via bearings; a connecting frame (13) is fixed to the outer end of the first connecting bearing seat (12); the connecting frame (13) is fixedly connected to the side of the separation box (2).

3. A paddy brown rice screening system according to claim 2, characterized in that: Two second connecting rocker arms (14) are fixed to the main shaft (8) via second eccentric wheels, a second connecting shaft (15) is fixed between the extended ends of the second connecting rocker arms (14) via bearings, two second connecting bearing seats are fixed to the second connecting shaft (15) via bearings, a fixing seat (16) is fixed to the outer side of the second connecting bearing seat, and the fixing seat (16) is used to fix a counterweight; the first connecting rocker arm (10) and the second connecting rocker arm (14) extend in opposite directions.

4. A paddy brown rice screening system according to claim 3, characterized in that: A cross bar is fixed inside the frame (1), two first hinged seats (17) are fixed on the cross bar, a first connecting piece is hinged on the first hinged seat (17), a counterweight support frame (18) is fixed on the first connecting piece, and the upper end of the counterweight support frame (18) is fixedly connected to the bottom of the fixed seat (16).

5. The paddy brown rice screening system according to claim 1, characterized in that: The support mechanism comprises two second bearing seats (19) fixed in the frame (1) and arranged opposite to each other, a long shaft (20) being fixed between the two second bearing seats (19) via a bearing, a plurality of connecting rods (21) being fixed on the long shaft (20), an adjusting rod (22) being fixed on the extended end of the connecting rod (21), two adjusting plates (23) being fixed on the adjusting rod (22), a short shaft (24) being fixed between the extended ends of the adjusting plates (23), an adjusting screw (25) being fixed on the short shaft (24), and two mounting seats (26) being fixed opposite to each other in the frame (1). A rotating bearing seat (27) is rotatably arranged between the two mounting seats (26); the upper end of the adjusting screw rod (25) passes through the rotating bearing seat (27) and is fixed with a limit rod (28); two second hinge seats are respectively fixed on the long shaft (20) and the adjusting rod (22); a rectangular frame is fixed on the second hinge seat via a hinged second connecting seat; a third hinge seat is fixed on the upper end of the rectangular frame; a supporting seat (29) is fixed on the third hinge seat via a third connecting member; the separation box (2) is fixed on the supporting seat (29); the bottom of the supporting seat (29) is a horizontal surface, and the upper side thereof is an inclined surface.

6. A paddy brown rice screening system according to claim 1, characterized in that: The receiving box (4) is fixed to the discharge end of the separation box (2), and the separation mechanism includes two third bearing seats fixed to the receiving box (4) and arranged opposite to each other, a rotating shaft is fixed between the two third bearing seats via bearings, a sliding seat is swivel-connected to the rotating shaft, a linear slide rail is fixed to the inner wall of the receiving box (4), a movable partition (30) is fixed to the sliding seat and the linear slide rail, and one end of the rotating shaft extends to the outside of the receiving box (4) and is fixed to an adjusting wheel (31).

7. A paddy brown rice screening system according to claim 1, characterized in that: The side surfaces of the separation box (2) in the longitudinal direction are open, which respectively form a feed inlet and a discharge outlet. The interior of the separation box (2) is divided into a plurality of layers by fish scale plates (3). A plurality of partitions (32) are fixed to the feed inlet of the separation box (2). The partitions (32) are of a bent structure, and their lower side ends are respectively connected to the fish scale plates (3). The hopper (5) is fixed to the upper side ends of the partitions (32).

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