Rice grading seed selection device

Abstract

The utility model relates to the field of rice seed selection equipment, and discloses a rice grading seed selection device which comprises a machine shell, a driving mechanism, a screening mechanism and a cleaning mechanism. A rice feeding pipe is fixedly connected to the machine shell, the screening mechanism is arranged on the machine shell and connected with the rice feeding pipe, the driving mechanism is arranged on the machine shell and connected with the screening mechanism, and the cleaning mechanism is arranged on the rice feeding pipe and the machine shell and connected with the screening mechanism. The screening mechanism comprises a first rice screening barrel, a second rice screening barrel, a third rice screening barrel, a fourth rice screening barrel and a threaded rod, and the first rice screening barrel is rotationally connected to the machine shell. Compared with the prior art, the rice grading seed selection device has the following advantages and effects that through cooperation of all the components, the effect of grading seed selection of rice of different sizes can be achieved, the application range and convenience are improved, the purpose of preventing the rice from blocking the first sieve holes and the second sieve holes can be achieved, and efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to rice seed selection equipment technical field, especially in kind of rice grading seed selection device. BACKGROUND

[0002] Rice is called rice, and it is an annual aquatic herb of poaceae, China is one of the original places of rice, and the farmland in the southern region of China is mainly paddy field, and the grain crop is mainly rice, and the seed selection of rice is the first step of rice seedling, and the selection of high-quality, suitable local climate conditions is the key to cultivate strong seedling, and in the seed selection, full, no disease and insect pests, no impurities are selected;

[0003] The prior art is vibration type, which has large structure noise and increases the instability of the structure during vibration, and the seed selection device for screening material by centrifugal force generated by the rotating device needs to be provided with multiple layers of sieve cylinders inside and outside, and the seed selection device has large space requirement, and the vertical cylinder type structure usually adopts vibration type for seed selection, and the two structures cannot be combined well, and the document with application number 201921572797.7 discloses a kind of rice grading seed selection device, which includes external limiting sleeve;The limiting sleeve;The upper end of the limiting sleeve is provided with a mounting plate, the upper end of the mounting plate is provided with a seed selection motor, the screw rod of the seed selection motor vertically extends downwards, and the first seed selection frame and the second seed selection frame are installed on the screw rod one above the other;The upper end of the two seed selection frames is in the form of opening, and the frame wall of the two seed selection frames is in the form of inclined slope, and the inclined slope frame wall extends obliquely and touches the inner wall of the limiting sleeve;

[0004] However, the above patent document has the following deficiencies: in use, since the shapes and sizes of seeds of different types of rice are different, the size of the sieve hole on the seed selection frame is fixed, which is not convenient for grading and selecting different types of rice, and there is certain limitation and inconvenience, which needs to be improved. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of rice grading seed selection device, with the effect of not only grading and selecting different sizes of rice, but also avoiding the blockage of multiple sieve holes one and sieve holes two.

[0006] The above technical purpose of the utility model is realized by the following technical scheme: a kind of rice grading seed selection device, including casing, drive mechanism, screening mechanism and cleaning mechanism;

[0007] The rice feeding pipe is fixedly connected to the shell, the screening mechanism is arranged on the shell and connected with the rice feeding pipe, the driving mechanism is arranged on the shell and connected with the screening mechanism, and the cleaning mechanism is arranged on the rice feeding pipe and the shell and connected with the screening mechanism.

[0008] The screening mechanism comprises a first rice sieve barrel, a second rice sieve barrel, a third rice sieve barrel, a fourth rice sieve barrel and a threaded rod.

[0009] The third rice sieve barrel is fixedly connected to the second rice sieve barrel, the third rice sieve barrel is movably connected with the rice feeding pipe, the fourth rice sieve barrel is movably connected to the third rice sieve barrel, and the fourth rice sieve barrel is rotatably connected with the rice feeding pipe.

[0010] The third rice sieve barrel and the fourth rice sieve barrel are both provided with the second screen holes and correspond to each other, and are used for screening rice.

[0011] The utility model discloses a further setting for: the rice sieve bucket one is rotationally connected with threaded rod, threaded rod with rice sieve bucket two and rice sieve bucket three screw connection, one end of threaded rod with rice sieve bucket four rotationally connected, through the rotation threaded rod makes threaded rod rotate on rice sieve bucket one and rice sieve bucket four and with rice sieve bucket two and rice sieve bucket three carries out the screw transmission, makes rice sieve bucket two and rice sieve bucket three respectively on rice sieve bucket one and rice sieve bucket four sliding, and makes the sieve hole one between rice sieve bucket one with rice sieve bucket two and the sieve hole two between rice sieve bucket three with rice sieve bucket four is between the dislocation, thereby reaches the effect that the size of multiple sieve hole one and sieve hole two is adjusted, and then reaches the effect that the different size rice seed is conveniently graded and selected, and the application range of promotion is convenient.

[0012] The utility model discloses a further setting for: the drive mechanism includes motor, gear and toothing ring, motor fixed mounting on the casing, the output of motor penetrates the casing and is fixedly connected with gear, is engaged to have toothing ring on the gear, toothing ring fixedly covers and is established on rice sieve bucket one, through the drive of motor makes the gear rotate and carries out the meshing transmission with toothing ring, and simultaneously toothing ring drives rice sieve bucket one to rotate on the casing, fixed ring and rice feed pipe, and simultaneously rice sieve bucket one drives rice sieve bucket two, rice sieve bucket three and rice sieve bucket four on rice feed pipe synchronous rotation through the effect of the clamping block on threaded rod and rice sieve bucket two and rice sieve bucket three.

[0013] The utility model discloses a further setting for: the cleaning mechanism includes cleaning board no. 1, stir -frying board and cleaning board no. 2, cleaning board no. 1 fixed mounting at rice feed pipe top and with rice sieve bucket four contact connection, the bottom plate fixed mounting of rice feed pipe has two stir -frying boards, two stir -frying boards all with rice sieve bucket four contact connection, can reach the effect that rice seed is stirred -frying through the effect of two stir -frying boards, and the effect of rice classification screening is improved.

[0014] The utility model discloses a further setting for: cleaning board no. 2 fixed installation in the casing, cleaning board no. 2 with rice sieve bucket one contact connection, cleaning board no. 1 and cleaning board no. 2 respectively with rice sieve bucket four and rice sieve bucket one are adapted, can reach the effect that multiple sieve hole no. 2 on rice sieve bucket four and rice sieve bucket three and multiple sieve hole no. 2 on rice sieve bucket one and rice sieve bucket two are cleaned through the effect of cleaning board no. 1 and cleaning board no. 2, and then reach the effect that the rice is avoided and is jammed multiple sieve hole no. 1 and sieve hole no. 2, and the effect of rice classification screening is further improved.

[0015] The further setting of the utility model is that: bearing one is fixedly sleeved on both ends of the rice sieve barrel one, the outer walls of two bearing ones are fixedly connected with the shell and the fixed ring respectively, two bearing two are fixedly sleeved on the rice feeding pipe, the outer walls of two bearing two are fixedly connected with the rice sieve barrel one and the rice sieve barrel four respectively, and the rice sieve barrel one and the rice sieve barrel four are convenient to rotate.

[0016] The further setting of the utility model is that: two bearing three are fixedly sleeved on the threaded rod, the outer walls of two bearing three are fixedly connected with the rice sieve barrel one and the rice sieve barrel four respectively, the threaded rod is convenient to rotate, one end of the rice sieve barrel two is fixedly connected with the elastic rubber ring one, the elastic rubber ring one is slidably connected with the rice sieve barrel one and is contactly connected with the shell, one end of the rice sieve barrel three is fixedly connected with the elastic rubber ring two, the elastic rubber ring two is slidably connected with the rice sieve barrel four and is contactly connected with the shell, and the effect that the rice can not jam the rice sieve barrel two and the rice sieve barrel three is avoided through the action of the elastic rubber ring one and the elastic rubber ring two.

[0017] The further setting of the utility model is that: the shell is equipped with the discharge pipe one, the discharge pipe two and the discharge pipe three, the discharge pipe one corresponds to the rice sieve barrel four, the discharge pipe two corresponds to the rice sieve barrel two, and the discharge pipe three is arranged at the bottom of the shell, and the rice after grading and selecting is discharged through the action of the discharge pipe one, the discharge pipe two and the discharge pipe three.

[0018] The utility model discloses the beneficial effect is: through the cooperation design between the shell, the rice feeding pipe, the screening mechanism, the driving mechanism and the cleaning mechanism, not only can reach the effect that the rice of different sizes is graded and selected, improves the application range and convenience, also can reach the effect that the rice is avoided to jam multiple screen holes one and screen hole two, improves the efficiency. ACCURATE DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will briefly introduce the drawing needed to be used in the embodiment description, and obviously, the drawing in the following description is only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0020] Figure 1 It is a three-dimensional structure schematic view of the utility model to propose a kind of rice grading and selecting device;

[0021] Figure 2 It is a main view structural dissection schematic view of the utility model to propose a kind of rice grading and selecting device;

[0022] Figure 3 It isFigure 2 An enlarged structural schematic view at point A;

[0023] Figure 4 For Figure 2 An enlarged structural schematic view at point B;

[0024] Figure 5 A screening mechanism structural view of a rice grading and seed selecting device.

[0025] In the figure, 1, a machine shell; 2, a rice sieve barrel one; 3, a rice sieve barrel two; 4, a rice sieve barrel three; 5, a rice sieve barrel four; 6, a rice feeding pipe; 7, a fixed ring; 8, an electric motor; 9, a gear; 10, a gear ring; 11, a threaded rod; 12, a cleaning plate one; 13, a stir-frying plate; 14, a cleaning plate two; 15, an elastic rubber ring one; 16, an elastic rubber ring two; 17, a discharge pipe one; 18, a discharge pipe two; 19, a discharge pipe three. DETAILED DESCRIPTION

[0026] The technical solutions of the present application will be described clearly and completely in combination with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0028] Referring to Figures 1-5 , a rice grading and seed selecting device, comprising a machine shell 1, a driving mechanism, a screening mechanism and a cleaning mechanism;

[0029] The machine shell 1 is fixedly connected with a rice feeding pipe 6, the screening mechanism is arranged on the machine shell 1 and connected with the rice feeding pipe 6, the driving mechanism is arranged on the machine shell 1 and connected with the screening mechanism, and the cleaning mechanism is arranged on the rice feeding pipe 6 and the machine shell 1 and connected with the screening mechanism;

[0030] The screening mechanism includes rice sieve barrel 1 (2), rice sieve barrel 2 (3), rice sieve barrel 3 (4), rice sieve barrel 4 (5), and a threaded rod (11). Rice sieve barrel 1 (2) is rotatably connected to the housing 1. Rice sieve barrel 1 (2) is rotatably connected to the rice feed pipe 6. Rice sieve barrel 2 (3) is slidably connected inside rice sieve barrel 1 (2). Rice sieve barrel 2 (3) is movably connected to the rice feed pipe 6. Multiple sieve holes 1 are opened on both rice sieve barrel 1 (2) and rice sieve barrel 2 (3), and they are all corresponding. Through the coordinated design between the housing 1, rice feed pipe 6, screening mechanism, drive mechanism, and cleaning mechanism, not only can the effect of grading and selecting rice of different sizes be achieved, improving the scope of application and convenience, but also the rice can be prevented from clogging multiple sieve holes 1 and 2, thus improving efficiency.

[0031] In this embodiment, a rice sieve barrel 3 is fixedly connected inside the second rice sieve barrel 3. The third rice sieve barrel 4 is movably connected to the rice feed pipe 6. A fourth rice sieve barrel 5 is slidably connected inside the third rice sieve barrel 4. The fourth rice sieve barrel 5 is rotatably connected to the rice feed pipe 6. One end of the fourth rice sieve barrel 5 is rotatably connected to the machine casing 1. The first step of rice sieving is achieved through the multiple sieve holes 2 on the third rice sieve barrel 4 and the fourth rice sieve barrel 5. At the same time, the second step of rice sieving is achieved through the multiple sieve holes 1 on the first rice sieve barrel 2 and the second rice sieve barrel 3. Thus, the rice is graded and selected.

[0032] In this embodiment, rice sieve barrel 3 4 and rice sieve barrel 4 5 are both provided with two corresponding sieve holes for screening rice. A fixing ring 7 is rotatably sleeved on rice sieve barrel 1 2, and the fixing ring 7 is fixedly connected to the machine casing 1 to facilitate the rotation of rice sieve barrel 1 2. A discharge port is provided on rice feed pipe 6 to facilitate the discharge of rice.

[0033] In this embodiment, a threaded rod 11 is rotatably connected to the rice sieve barrel 2. The threaded rod 11 is threadedly connected to the rice sieve barrels 3 and 4. One end of the threaded rod 11 is rotatably connected to the rice sieve barrel 5. By rotating the threaded rod 11, the threaded rod 11 rotates on the rice sieve barrels 2 and 5 and performs threaded transmission with the rice sieve barrels 3 and 4. This causes the rice sieve barrels 3 and 4 to slide on the rice sieve barrels 2 and 5 respectively, and causes the sieve holes between the rice sieve barrels 2 and 3 to... The sieve holes 2 between rice sieve barrel 3 (4) and rice sieve barrel 4 (5) are misaligned, thereby achieving the effect of adjusting the size of multiple sieve holes 1 and 2, which facilitates the grading and selection of rice seeds of different sizes, improving the applicability and convenience. There are locking blocks between sieve barrel 1 (2) and sieve barrel 2 (3) and between sieve barrel 3 (4) and sieve barrel 4 (5). The locking blocks facilitate the sliding of sieve barrel 2 (3) and sieve barrel 3 (4) on sieve barrel 1 (2) and sieve barrel 4 (5) respectively, and facilitate the transmission between sieve barrel 1 (2), sieve barrel 2 (3), sieve barrel 3 (4), and sieve barrel 4 (5).

[0034] In the embodiment, the driving mechanism comprises the motor 8, the gear 9 and the gear ring 10, the motor 8 is fixedly installed on the shell 1, the output end of the motor 8 penetrates through the shell 1 and is fixedly connected with the gear 9, the gear 9 is in meshing connection with the gear ring 10, the gear ring 10 is fixedly sleeved on the rice sieve barrel one 2, the rotation of the gear 9 is driven by the motor 8 and is in meshing transmission with the gear ring 10, at the same time, the gear ring 10 drives the rice sieve barrel one 2 to rotate on the shell 1, the fixed ring 7 and the rice feeding pipe 6, at the same time, the rice sieve barrel one 2 drives the rice sieve barrel two 3, the rice sieve barrel three 4 and the rice sieve barrel four 5 to rotate synchronously on the rice feeding pipe 6 through the action of the clamping block on the threaded rod 11 and the rice sieve barrel two 3 and the rice sieve barrel three 4.

[0035] In the embodiment, the cleaning mechanism comprises the cleaning plate one 12, the stir-frying plate 13 and the cleaning plate two 14, the cleaning plate one 12 is fixedly installed on the top of the rice feeding pipe 6 and is in contact connection with the rice sieve barrel four 5, the bottom plate of the rice feeding pipe 6 is fixedly installed with two stir-frying plates 13, the two stir-frying plates 13 are in contact connection with the rice sieve barrel four 5, the effect of stir-frying the rice seeds can be achieved through the action of the two stir-frying plates 13, and the effect of the rice grading and screening is improved.

[0036] In the embodiment, the cleaning plate two 14 is fixedly installed in the shell 1, the cleaning plate two 14 is in contact connection with the rice sieve barrel one 2, the cleaning plate one 12 and the cleaning plate two 14 are respectively matched with the rice sieve barrel four 5 and the rice sieve barrel one 2, the effect of cleaning the multiple sieve holes two on the rice sieve barrel four 5 and the rice sieve barrel three 4 and the multiple sieve holes two on the rice sieve barrel one 2 and the rice sieve barrel two 3 can be achieved through the action of the cleaning plate one 12 and the cleaning plate two 14, thereby the effect of avoiding the rice from blocking the multiple sieve holes one and sieve holes two is achieved, and the effect of the rice grading and screening is further improved.

[0037] In the embodiment, the two ends of the rice sieve barrel one 2 are fixedly sleeved with the bearing one, the outer walls of the two bearings one are respectively fixedly connected with the shell 1 and the fixed ring 7, the rice feeding pipe 6 is fixedly sleeved with the two bearings two, the outer walls of the two bearings two are respectively fixedly connected with the rice sieve barrel one 2 and the rice sieve barrel four 5, and the rotation of the rice sieve barrel one 2 and the rice sieve barrel four 5 is facilitated.

[0038] In this embodiment, the threaded rod 11 is fixedly sleeved with two bearings three, the outer walls of the two bearings three are respectively fixedly connected with the rice sieve barrel one 2 and the rice sieve barrel four 5, the threaded rod 11 is convenient to rotate, one end of the rice sieve barrel two 3 is fixedly connected with an elastic rubber ring one 15, the elastic rubber ring one 15 is slidably connected with the rice sieve barrel one 2 and is in contact with the shell 1, one end of the rice sieve barrel three 4 is fixedly connected with an elastic rubber ring two 16, the elastic rubber ring two 16 is slidably connected with the rice sieve barrel four 5 and is in contact with the shell 1, through the action of the elastic rubber ring one 15 and the elastic rubber ring two 16, the effect that the rice sieve barrel two 3 and the rice sieve barrel three 4 are prevented from being clamped by the rice can be achieved.

[0039] In this embodiment, the shell 1 is provided with a discharge pipe one 17, a discharge pipe two 18 and a discharge pipe three 19, the discharge pipe one 17 corresponds to the rice sieve barrel four 5, the discharge pipe two 18 corresponds to the rice sieve barrel two 3, the discharge pipe three 19 is arranged at the bottom of the shell 1, through the action of the discharge pipe one 17, the discharge pipe two 18 and the discharge pipe three 19, the rice after the completion of the grading and selecting is discharged.

[0040] Working principle: in use, the rice seeds needing powder screening are conveyed into the rice sieve barrel four 5 through the rice feeding pipe 6, at the same time, the motor 8 is started, the rotation of the gear 9 is driven by the motor 8 and is meshed with the gear ring 10 for transmission, at the same time, the gear ring 10 drives the rice sieve barrel one 2 to rotate on the shell 1, the fixed ring 7 and the rice feeding pipe 6, at the same time, the rice sieve barrel one 2 drives the rice sieve barrel two 3, the rice sieve barrel three 4 and the rice sieve barrel four 5 to rotate synchronously on the rice feeding pipe 6 through the action of the threaded rod 11 and the clamping blocks on the rice sieve barrel two 3 and the rice sieve barrel three 4, in this process, the effect that the rice is first screened is achieved through the multiple sieve holes two on the rice sieve barrel three 4 and the rice sieve barrel four 5; at the same time, the effect that the rice is second screened is achieved through the multiple sieve holes one on the rice sieve barrel one 2 and the rice sieve barrel two 3; then the effect that the rice is graded and selected is achieved.

[0041] Through the rotation of the threaded rod 11, the threaded rod 11 rotates on the rice sieve barrel one 2 and the rice sieve barrel four 5 and is in threaded transmission with the rice sieve barrel two 3 and the rice sieve barrel three 4, so that the rice sieve barrel two 3 and the rice sieve barrel three 4 respectively slide on the rice sieve barrel one 2 and the rice sieve barrel four 5, and the sieve holes one between the rice sieve barrel one 2 and the rice sieve barrel two 3 and the sieve holes two between the rice sieve barrel three 4 and the rice sieve barrel four 5 are dislocated, so that the effect that the sizes of the multiple sieve holes one and the sieve holes two are adjusted is achieved, and then the effect that the rice seeds of different sizes are conveniently graded and selected is achieved, the application range is improved and the convenience is improved;

[0042] In the rotating process of the rice screening barrel one 2, the rice screening barrel two 3, the rice screening barrel three 4 and the rice screening barrel four 5, the effect of the rice seed roasting can be achieved through the action of the two roasting plates 13, and the effect of the rice grading screening is improved; meanwhile, the effect of cleaning the multiple screen holes two on the rice screening barrel four 5 and the rice screening barrel three 4 and the multiple screen holes two on the rice screening barrel one 2 and the rice screening barrel two 3 can be achieved through the action of the cleaning plate one 12 and the cleaning plate two 14, thereby the effect of avoiding the rice from blocking the multiple screen holes one and the screen holes two is achieved, and the effect of the rice grading screening is further improved.

[0043] Finally, the rice after the grading seed selection is discharged through the action of the discharge pipe one 17, the discharge pipe two 18 and the discharge pipe three 19.

[0044] The technical progress obtained by the utility model relative to the prior art is that: through the cooperation of various components, the effect of grading and selecting rice of different sizes can be achieved, the application range and convenience are improved, the effect of avoiding the rice from blocking the multiple screen holes one and the screen holes two is achieved, the efficiency is improved, the structure is simple, and the practicality is higher.

Claims

1. A rice grading and selection device, characterized in that, Includes housing (1), drive mechanism, screening mechanism and cleaning mechanism; A rice feed pipe (6) is fixedly connected to the housing (1). The screening mechanism is set on the housing (1) and connected to the rice feed pipe (6). The driving mechanism is set on the housing (1) and connected to the screening mechanism. The cleaning mechanism is set on the rice feed pipe (6) and the housing (1) and connected to the screening mechanism. The screening mechanism includes a rice sieve barrel one (2), a rice sieve barrel two (3), a rice sieve barrel three (4), a rice sieve barrel four (5), and a threaded rod (11). The rice sieve barrel one (2) is rotatably connected to the housing (1). The rice sieve barrel one (2) is rotatably connected to the rice feed pipe (6). The rice sieve barrel two (3) is slidably connected inside the rice sieve barrel one (2). The rice sieve barrel two (3) is movably connected to the rice feed pipe (6). The rice sieve barrel one (2) and the rice sieve barrel two (3) are each provided with a plurality of sieve holes that are all corresponding to each other.

2. The rice grading and seed selection device according to claim 1, characterized in that: Rice sieve barrel two (3) is fixedly connected to rice sieve barrel three (4), rice sieve barrel three (4) is movably connected to rice feed pipe (6), rice sieve barrel four (5) is slidably connected to rice sieve barrel three (4), rice sieve barrel four (5) is rotatably connected to rice feed pipe (6), and one end of rice sieve barrel four (5) is rotatably connected to machine casing (1).

3. The rice grading and seed selection device according to claim 2, characterized in that: Both rice sieve barrel three (4) and rice sieve barrel four (5) are provided with two sieve holes, which are corresponding to each other. A fixing ring (7) is rotatably sleeved on rice sieve barrel one (2). The fixing ring (7) is fixedly connected to the machine casing (1). A discharge port is provided on the rice feed pipe (6).

4. The rice grading and seed selection device according to claim 3, characterized in that: A threaded rod (11) is rotatably connected to the first rice sieve bucket (2). The threaded rod (11) is threadedly connected to the second rice sieve bucket (3) and the third rice sieve bucket (4). One end of the threaded rod (11) is rotatably connected to the fourth rice sieve bucket (5).

5. The rice grading and seed selection device according to claim 1, characterized in that: The drive mechanism includes an electric motor (8), a gear (9) and a gear ring (10). The electric motor (8) is fixedly installed on the housing (1). The output end of the electric motor (8) passes through the housing (1) and is fixedly connected to the gear (9). The gear (9) is meshed with the gear ring (10). The gear ring (10) is fixedly sleeved on the rice sieve bucket (2).

6. The rice grading and seed selection device according to claim 1, characterized in that: The cleaning mechanism includes a first cleaning plate (12), a stir-frying plate (13), and a second cleaning plate (14). The first cleaning plate (12) is fixedly installed on the top of the rice feed pipe (6) and is in contact with the fourth rice sieve (5). Two stir-frying plates (13) are fixedly installed on the bottom plate of the rice feed pipe (6), and both stir-frying plates (13) are in contact with the fourth rice sieve (5).

7. A rice grading and seed selection device according to claim 6, characterized in that: The second cleaning plate (14) is fixedly installed inside the housing (1). The second cleaning plate (14) is in contact with the first rice sieve (2). The first cleaning plate (12) and the second cleaning plate (14) are respectively adapted to the fourth rice sieve (5) and the first rice sieve (2).

8. A rice grading and seed selection device according to claim 3, characterized in that: The rice sieve barrel 1 (2) is fixedly fitted with bearing 1 at both ends. The outer walls of the two bearings 1 are fixedly connected to the machine housing (1) and the fixing ring (7) respectively. The rice feed pipe (6) is fixedly fitted with two bearings 2. The outer walls of the two bearings 2 are fixedly connected to the rice sieve barrel 1 (2) and the rice sieve barrel 4 (5) respectively.

9. A rice grading and seed selection device according to claim 4, characterized in that: Two bearings are fixedly sleeved on the threaded rod (11). The outer walls of the two bearings are fixedly connected to the rice sieve bucket one (2) and the rice sieve bucket four (5) respectively. One end of the rice sieve bucket two (3) is fixedly connected to an elastic rubber ring one (15). The elastic rubber ring one (15) is slidably connected to the rice sieve bucket one (2) and in contact with the machine housing (1). One end of the rice sieve bucket three (4) is fixedly connected to an elastic rubber ring two (16). The elastic rubber ring two (16) is slidably connected to the rice sieve bucket four (5) and in contact with the machine housing (1).

10. A rice grading and seed selection device according to claim 1, characterized in that: The housing (1) is provided with discharge pipe one (17), discharge pipe two (18) and discharge pipe three (19). Discharge pipe one (17) corresponds to rice sieve barrel four (5), discharge pipe two (18) corresponds to rice sieve barrel two (3), and discharge pipe three (19) is located at the bottom of the housing (1).

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