An automated rice processing equipment for grading and screening

Abstract

The invention relates to the field of rice processing, and discloses an automatic rice processing device for grading and screening, comprising a machine body, a dust removal component arranged on the machine body, and a screening component arranged on the machine body, wherein one end of a first through pipe close to the dust collecting member is connected with a feeding pipe in a vertical downward direction, the screening component comprises a second through pipe connected with the bottom end of the feeding pipe and a first feeding hole opened at one end of the second through pipe away from the feeding pipe, a first feeding part and a second feeding part are sequentially arranged at the bottom of the second through pipe, and a pushing mechanism for pushing a rice is arranged in the second through pipe; the invention has the effect of realizing dust removal and grading and screening of rice.

Description

Technical Field

[0001] The invention relates to the technical field of rice processing, and in particular to automated rice processing equipment for grading and screening. Background Art

[0002] Rice is a finished product made from paddy rice after processes such as cleaning, husking, milling and finishing. It contains nearly 64% of the nutrients in rice and more than 90% of the nutrients needed by the human body. It is also the staple food for people in most parts of China.

[0003] After rice processing is completed, due to various reasons, the sizes of processed rice grains are not the same. Some grains are relatively large, some are relatively small, and some are broken rice. In addition, the processed rice also contains rice debris and dust, so the processed rice needs to be dusted and graded. Summary of the invention

[0004] The invention aims to provide an automatic rice processing device for grading and screening, which has the effects of achieving dust removal and grading and screening of rice.

[0005] The above technical purpose of the present invention is achieved through the following technical solutions: it includes a machine body, a dust removal component arranged on the machine body, and a screening component arranged on the machine body, the dust removal component includes a first through pipe horizontally arranged on the machine body and a blower arranged at one end of the first through pipe, the end of the first through pipe close to the blower is connected to a feed hopper in a vertical direction, the end of the first through pipe away from the blower is provided with a dust collecting member, and the end of the first through pipe close to the dust collecting member is connected to a discharge pipe in a vertical downward direction The screening assembly includes a second through pipe connected to the bottom end of the discharge pipe and a first discharge hole opened at one end of the second through pipe away from the discharge pipe, the bottom of the second through pipe is sequentially provided with a first discharge part and a second discharge part, the first discharge part is evenly provided with second discharge holes, the second discharge part is evenly provided with third discharge holes, the aperture of the second discharge hole is smaller than the aperture of the third discharge hole, the first discharge part is located at one end of the second through pipe close to the discharge pipe, and a pushing mechanism for pushing one meter is provided in the second through pipe.

[0006] By adopting the above technical solution, a blower, a vacuum cleaner and a second through pipe are arranged. When the rice needs to be processed, the rice is first poured from the feed hopper into the first through pipe, the blower and the vacuum cleaner are turned on, the blower blows out air in the direction close to the dust collecting member, and the lighter dust impurities in the rice are separated from the rice by the wind force, and then the dust collecting member collects the blown out dust impurities, and at the same time, the rice can be moved in the direction close to the discharge port under the action of wind force, and then the rice enters the second through pipe from the discharge pipe, the pushing mechanism is turned on, and the pushing mechanism pushes the rice to move in the second through pipe, and when the rice passes through the first discharge part, the broken rice with smaller particle size in the rice passes through The rice is discharged through the second discharge hole, and then when the rice enters the second discharge part under the push of the pushing mechanism, the part of the rice with relatively smaller particles is discharged through the third discharge hole through the pipe, and then the part of the rice with larger particles is discharged through the first discharge hole at the end of the second through pipe under the push of the pushing mechanism, thereby completing the entire dust removal and grading and screening process of the rice; by arranging a blower, a dust suction part, etc., which cooperate with each other, it is convenient to separate the dust in the rice particles from the rice, and at the same time, the dust removal component and the screening component are connected through the discharge pipe, so that the equipment is more compact, and the dust removal and grading and screening processes of the rice are completed in sequence, thereby improving the degree of automation of the entire process.

[0007] The present invention is further configured as follows: the cross-section of the second through tube is circular, the pushing mechanism includes a pushing rod rotatably arranged in the second through tube and a driving motor arranged on the second through tube for driving the pushing rod to rotate, a plurality of pushing plates are evenly arranged on the pushing rod, and the pushing plates can be movably fitted to the inner wall of the second through tube.

[0008] By adopting the above technical solution, a pushing rod and a pushing plate are provided. After the rice enters the second through pipe from the feeding pipe, the driving motor is turned on. The driving motor drives the pushing rod and the pushing plate to rotate. The pushing plate pushes the rice to rotate during the rotation. During the rotation of the rice, the rice is discharged from the second feeding hole or the third feeding hole according to the size of the rice particles. During the rotation of the pushing plate, the rice will slowly move forward under the push of the pushing plate on the one hand, and will also move forward under the push of the subsequent dropped rice on the other hand. The whole structure is simple and easy to operate.

[0009] The present invention is further configured as follows: the second through pipe is disposed obliquely downward on the machine body, and a horizontal plane at one end of the second through pipe close to the discharge pipe is higher than a horizontal plane at one end of the second through pipe close to the first discharge hole.

[0010] By adopting the above technical solution, by setting the second through pipe at an angle, the rice can tend to move downward in the second through pipe under the action of gravity. Therefore, when the push plate pushes the rice to rotate, the rice will move downward while the push plate rotates, thereby accelerating the movement speed of the rice in the second through pipe and accelerating the rice screening rate.

[0011] The present invention is further configured as follows: a circular arc-shaped baffle plate is provided at the bottom of the second through tube in a direction perpendicular to the central axis of the second through tube, the baffle plate is located between the first unloading portion and the second unloading portion, and a rotating groove matching the baffle plate is provided on the push plate.

[0012] By adopting the above technical solution, a baffle plate is provided, so that when the rice moves downward with the push plate for screening, it will stay in the first feeding part under the obstruction of the baffle plate, and then the push plate pushes the rice to rotate to the upper half of the second through pipe, and the rice enters the second feeding part from the gap between the baffle plate and the top of the second through pipe. Therefore, the baffle plate is provided, which can increase the time that the rice stays in the first feeding part, ensuring that the rice enters the second feeding part from the top of the second through pipe after being screened in the first feeding part under the push of the push plate, thereby improving the screening effect of the rice.

[0013] The present invention is further configured as follows: the longitudinal cross-section of the first through-tube is rectangular, the first through-tube includes a bottom plate arranged at the bottom of the first through-tube, the bottom plate is hingedly provided with a discharge plate at one end close to the discharge pipe, both sides of the discharge plate are movably fitted to the inner wall of the first through-tube, and the second through-tube is provided with a discharge mechanism for driving the discharge plate to rise and fall at one end close to the blower.

[0014] By adopting the above technical solution, the first through pipe is set to a rectangle, and a discharge plate and a discharge mechanism are provided at the same time, so that the discharge mechanism can drive the discharge plate to reciprocate and rise and fall at one end close to the blower. During the rising process of the end of the discharge plate, the discharge plate is in an inclined state, which can make the rice on the discharge plate move in the direction close to the discharge pipe under the action of gravity, thereby accelerating the movement rate of the rice in the first through pipe, thereby improving the working efficiency of the entire equipment.

[0015] The present invention is further configured as follows: the second through-tube is located directly below the first through-tube, the unloading mechanism includes a lifting groove on the top of the second through-tube opened in a direction perpendicular to the central axis of the second through-tube and a lifting block matching the lifting groove, the bottom of the lifting block is arc-shaped, a lifting rod is provided on the lifting block in a direction perpendicular to the central axis of the second through-tube, the top end of the lifting rod movably passes through the bottom plate and movably fits the unloading plate, a return spring is provided between the bottom of the bottom plate and the top end of the lifting block, the lifting rod movably passes through the return spring, and when the push plate rotates, the push plate can push the lifting block to move in a direction away from the second through-tube, and when the return spring is at its original length, the bottom of the lifting block is located in the second through-tube.

[0016] By adopting the above technical scheme, a lifting block, a lifting rod, etc. are set. In the process of the push plate driving the push plate to rotate and push the rice, after the push plate rotates to abut against the arc-shaped lifting block, the push plate pushes the lifting block to move in the direction away from the second through pipe. In this process, the lifting rod is pushed, so that the lifting rod pushes the end of the unloading plate to rise and compresses the reset spring at the same time. Then the push plate is separated from the lifting block. Under the elastic force of the reset spring, the lifting block and the lifting rod move downward, so that the end of the unloading plate also drops accordingly. Therefore, by setting the lifting block, etc., the push plate can push the lifting block to rise and fall in the process of pushing the rice for screening, thereby realizing the lifting and lowering of the end of the unloading plate, accelerating the movement of the rice in the first through pipe, achieving the purpose of saving energy, and further connecting the screening component and the dust removal component together.

[0017] The present invention is further configured as follows: an elastic soft belt is provided between one end of the blanking plate close to the blower and the inner wall of the first through pipe, and the width of the elastic soft belt is consistent with the width of the blanking plate.

[0018] By adopting the above technical solution and setting an elastic soft belt, on the one hand, the connection between the blanking plate and the first through pipe is increased, and on the other hand, the blocking of the through pipe elastic soft belt prevents rice from entering the gap between the end of the blanking plate and the first through pipe during the rising process of the blanking plate, thereby affecting the subsequent normal lifting and lowering of the blanking plate.

[0019] The present invention is further configured as follows: a first material receiving frame, a second material receiving frame and a third material receiving frame are provided on the machine body, the first material receiving frame is located below the first material discharge hole, the second material receiving frame is located directly below the second material discharge hole, and the third material receiving frame is located directly below the third material discharge hole.

[0020] By adopting the above technical solution, a first material receiving frame, a second material receiving frame and a third material receiving frame are provided to collect the sieved rice respectively.

[0021] The present invention is further configured as follows: a first material guide portion which is wide at the top and narrow at the bottom is provided at one end of the second through pipe away from the discharge pipe, a second material guide portion which is wide at the top and narrow at the bottom is provided on the outer wall of the first discharge portion, and a third material guide portion which is wide at the top and narrow at the bottom is provided on the outer wall of the second discharge portion.

[0022] By adopting the above technical solution, the first material guiding part, the second material guiding part and the third material guiding part are provided to ensure that the sieved rice can accurately fall into the corresponding material receiving frame.

[0023] The present invention is further configured as follows: the dust collecting member comprises a filter screen vertically arranged at the end of the first through pipe and a dust collector connected to the filter screen.

[0024] By adopting the above technical solution and setting a filter, it is prevented that the vacuum cleaner absorbs broken rice with smaller particle size into the vacuum cleaner, causing the loss of rice.

[0025] The beneficial effects of the present invention are:

[0026] 1. By setting up a blower, a dust collecting component, etc., which cooperate with each other, it is convenient to separate the dust in the rice particles from the rice. At the same time, the dust removal component and the screening component are connected through the feeding pipe, making the equipment more compact, completing the dust removal and grading screening process of the rice in turn, and improving the degree of automation of the whole process.

[0027] 2. By setting a baffle plate, the rice will stay in the first material discharge part under the obstruction of the baffle plate when it moves downward with the push plate for screening, and then the push plate pushes the rice to rotate to the upper half of the second through-tube, and the rice enters the second material discharge part from the gap between the baffle plate and the top of the second through-tube. Therefore, setting the baffle plate can increase the time that the rice stays in the first material discharge part, ensuring that the rice enters the second material discharge part from the top of the second through-tube after being screened in the first material discharge part under the push of the push plate, thereby improving the screening effect of the rice.

[0028] 3. By setting a lifting block, etc., the push plate can push the lifting block to move up and down while pushing the rice for screening, so as to realize the lifting and lowering of the end of the feeding plate, accelerate the movement of rice in the first passage, achieve the purpose of energy saving, and further connect the screening component with the dust removal component. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a structural schematic diagram of an embodiment of an automated rice processing equipment for grading and screening of the present invention;

[0031] Figure 2 It is a partial cross-sectional structural schematic diagram of an embodiment of an automated rice processing device for grading and screening of the present invention;

[0032] Figure 3 yes Figure 2 A is an enlarged schematic diagram;

[0033] Figure 4 yes Figure 2 A magnified schematic diagram of B.

[0034] In the figure, 1, machine body; 2, dust removal component; 2a, first through pipe; 2b, blower; 3, screening component; 3a, second through pipe; 3b, first discharge hole; 4, feed hopper; 5, dust collecting member; 5a, filter screen; 5b, dust collector; 6, discharge pipe; 7, first discharge part; 8, second discharge part; 9, second discharge hole; 10, third discharge hole; 11, push mechanism; 11a, push rod; 11b, drive The motor; 12, the push plate; 13, the baffle plate; 14, the rotating groove; 15, the bottom plate; 16, the unloading plate; 17, the unloading mechanism; 17a, the lifting groove; 17b, the lifting block; 18, the lifting rod; 19, the reset spring; 20, the elastic soft belt; 21, the first material receiving frame; 22, the second material receiving frame; 23, the third material receiving frame; 24, the first material guiding part; 25, the second material guiding part; 26, the third material guiding part. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The present invention provides an automated rice processing device for grading and screening, such as Figures 1 to 4As shown, it includes a machine body 1, a dust removal component 2 arranged on the machine body 1, and a screening component 3 arranged on the machine body 1, the dust removal component 2 includes a first through pipe 2a horizontally arranged on the machine body 1 and a blower 2b arranged at one end of the first through pipe 2a, the end of the first through pipe 2a close to the blower 2b is connected to a feed hopper 4 in a vertical direction, the end of the first through pipe 2a away from the blower 2b is provided with a dust collecting member 5, the end of the first through pipe 2a close to the dust collecting member 5 is connected to a feed pipe 6 in a vertical downward direction, and the screening component 3 includes A second through pipe 3a connected to the bottom end of the discharge pipe 6 and a first discharge hole 3b is opened at one end of the second through pipe 3a away from the discharge pipe 6, and a first discharge part 7 and a second discharge part 8 are sequentially arranged at the bottom of the second through pipe 3a, and second discharge holes 9 are evenly opened on the first discharge part 7, and third discharge holes 10 are evenly opened on the second discharge part 8. The aperture of the second discharge hole 9 is smaller than that of the third discharge hole 10. The first discharge part 7 is located at one end of the second through pipe 3a close to the discharge pipe 6, and a pushing mechanism 11 for pushing one meter is arranged in the second through pipe 3a.

[0037] Furthermore, the cross-section of the second through tube 3a is circular, and the pushing mechanism 11 includes a pushing rod 11a rotatably arranged in the second through tube 3a and a driving motor 11b arranged on the second through tube 3a for driving the pushing rod 11a to rotate, and a plurality of pushing plates 12 are evenly arranged on the pushing rod 11a, and the pushing plates 12 can be movably fitted to the inner wall of the second through tube 3a.

[0038] Furthermore, the second through pipe 3a is disposed obliquely downward on the machine body 1, and the horizontal plane at one end of the second through pipe 3a close to the discharge pipe 6 is higher than the horizontal plane at one end of the second through pipe 3a close to the first discharge hole 3b.

[0039] Furthermore, an arc-shaped baffle plate 13 is provided at the bottom of the second through pipe 3a in a direction perpendicular to the central axis of the second through pipe 3a, and the baffle plate 13 is located between the first unloading part 7 and the second unloading part 8. A rotating groove 14 cooperating with the baffle plate 13 is provided on the push plate 12.

[0040] Furthermore, the longitudinal cross-section of the first through-tube 2a is rectangular, and the first through-tube 2a includes a bottom plate 15 arranged at the bottom of the first through-tube 2a, and a discharge plate 16 is hingedly provided at one end of the bottom plate 15 close to the discharge pipe 6, and both sides of the discharge plate 16 are movably fitted to the inner wall of the first through-tube 2a, and a discharge mechanism 17 is provided on the second through-tube 3a for driving the discharge plate 16 to rise and fall at one end close to the blower 2b.

[0041] Further, the second through-tube 3a is located directly below the first through-tube 2a, and the unloading mechanism 17 includes a top lifting groove 17a opened on the second through-tube 3a in a direction perpendicular to the central axis of the second through-tube 3a and a lifting block 17b matched with the lifting groove 17a, the bottom of the lifting block 17b is arc-shaped, and a lifting rod 18 is provided on the lifting block 17b in a direction perpendicular to the central axis of the second through-tube 3a, the top end of the lifting rod 18 movably passes through the bottom plate 15 and movably fits the unloading plate 16, a return spring 19 is provided between the bottom of the bottom plate 15 and the top end of the lifting block 17b, the lifting rod 18 movably passes through the return spring 19, and when the push plate 12 rotates, the push plate 12 can push the lifting block 17b to move in a direction away from the second through-tube 3a, and when the return spring 19 is at its original length, the bottom of the lifting block 17b is located in the second through-tube 3a.

[0042] Furthermore, an elastic soft band 20 is provided between one end of the blanking plate 16 close to the blower 2 b and the inner wall of the first through pipe 2 a , and the width of the elastic soft band 20 is consistent with the width of the blanking plate 16 .

[0043] Furthermore, a first material receiving frame 21, a second material receiving frame 22 and a third material receiving frame 23 are provided on the machine body 1. The first material receiving frame 21 is located below the first material discharge hole 3b, the second material receiving frame 22 is located directly below the second material discharge hole 9, and the third material receiving frame 23 is located directly below the third material discharge hole 10.

[0044] Furthermore, a first material guide portion 24 which is wide at the top and narrow at the bottom is provided at one end of the second through pipe 3a away from the discharge pipe 6, a second material guide portion 25 which is wide at the top and narrow at the bottom is provided on the outer wall of the first discharge portion 7, and a third material guide portion 26 which is wide at the top and narrow at the bottom is provided on the outer wall of the second discharge portion 8.

[0045] Furthermore, the dust collecting member 5 includes a filter screen 5a vertically arranged at the end of the first through pipe 2a and a dust collector 5b connected to the filter screen 5a.

[0046] When the rice needs to be processed, the rice is first poured from the feed hopper 4 into the first through pipe 2a, the blower 2b, the dust collector 5b and the driving motor 11b are turned on, and the blower 2b blows out air in the direction close to the dust collecting member 5. Under the action of the wind, the lighter dust impurities in the rice are separated from the rice, and then the dust collector 5b collects the blown out dust impurities. At the same time, under the action of the wind and the lifting action of the end of the unloading plate 16 close to the blower 2b, the rice can be moved in the direction close to the unloading port. Then the rice enters the second through pipe 3a from the unloading pipe 6, and the push plate 12 pushes the rice to move in the second through pipe 3a. When the rice passes through the first unloading part 7, the broken rice with smaller particle size in the rice passes through the second unloading part 7. The rice is discharged through the second discharge hole 9, and then when the rice enters the second discharge part 8 under the push of the pushing mechanism 11, the part of the rice with relatively smaller particles is discharged through the third discharge hole 10, and then the part of the rice with larger particles is discharged through the first discharge hole 3b at the end of the second through pipe 3a under the push of the pushing mechanism 11, thereby completing the entire dust removal and grading and screening process of the rice; by arranging the blower 2b, the dust suction part 5, etc., which cooperate with each other, it is convenient to separate the dust in the rice particles from the rice, and at the same time, the dust removal component 2 and the screening component 3 are connected through the discharge pipe 6, so that the equipment is more compact, and the dust removal and grading and screening processes of the rice are completed in sequence, thereby improving the degree of automation of the entire process.

[0047] By setting a pushing rod 11a and a pushing plate 12, after the rice enters the second through pipe 3a from the feeding pipe 6, the driving motor 11b is turned on, and the driving motor 11b drives the pushing rod 11a and the pushing plate 12 to rotate. The pushing plate 12 pushes the rice to rotate during the rotation. During the rotation of the rice, the rice is discharged from the second feeding hole 9 or the third feeding hole 10 according to the size of the rice particles. During the rotation of the pushing plate 12, the rice will slowly move forward under the push of the pushing plate 12 on the one hand, and will also move forward under the push of the subsequent dropped rice on the other hand. The whole structure is simple and easy to operate.

[0048] By setting the second passage 3a at an angle, the rice can tend to move downward under the action of gravity in the second passage 3a. Therefore, when the push plate 12 pushes the rice to rotate, the rice will move downward as the push plate 12 rotates, thereby accelerating the movement speed of the rice in the second passage 3a and the rice screening rate.

[0049] By setting the baffle plate 13, the rice will stay in the first material discharge part 7 under the obstruction of the baffle plate 13 when it moves downward with the push plate 12 for screening, and then the push plate 12 pushes the rice to rotate to the upper half of the second through pipe 3a, and the rice enters the second material discharge part 8 from the gap between the baffle plate 13 and the top of the second through pipe 3a. Therefore, setting the baffle plate 13 can increase the time that the rice stays in the first material discharge part 7, ensuring that the rice enters the second material discharge part 8 from the top of the second through pipe 3a after being screened by the first material discharge part 7 under the push of the push plate 12, thereby improving the screening effect of the rice.

[0050] By setting the first through pipe 2a to a rectangular shape, and simultaneously providing a discharge plate 16 and a discharge mechanism 17, the discharge mechanism 17 can drive the discharge plate 16 to reciprocately rise and fall at one end close to the blower 2b. During the rising process of the end of the discharge plate 16, the discharge plate 16 is in an inclined state, which can enable the rice on the discharge plate 16 to move in a direction close to the discharge pipe 6 under the action of gravity, thereby accelerating the movement rate of the rice in the first through pipe 2a, thereby improving the working efficiency of the entire equipment.

[0051] By setting the lifting block 17b, the lifting rod 18, etc., in the process of the push plate 12 driving the push plate 12 to rotate and push the rice, after the push plate 12 rotates to abut against the arc-shaped lifting block 17b, the push plate 12 pushes the lifting block 17b to move in the direction away from the second through pipe 3a. In this process, the lifting rod 18 is pushed, so that the lifting rod 18 pushes the end of the unloading plate 16 to rise and compresses the return spring 19 at the same time. Then the push plate 12 is separated from the lifting block 17b, and the lifting block 17b and the lifting rod 18 move downward under the elastic force of the return spring 19, so that the end of the unloading plate 16 also drops accordingly. Therefore, by setting the lifting block 17b, etc., the push plate 12 can push the lifting block 17b to rise and fall in the process of pushing the rice for screening, thereby realizing the lifting and lowering of the end of the unloading plate 16, accelerating the movement of the rice in the first through pipe 2a, achieving the purpose of saving energy, and further connecting the screening component 3 with the dust removal component 2.

[0052] By providing the elastic soft band 20, on the one hand, the connection between the blanking plate 16 and the first through tube 2a is increased, and on the other hand, the blocking of the through tube elastic soft band 20 prevents rice from entering the gap between the end of the blanking plate 16 and the first through tube 2a during the rising process of the blanking plate 16, thereby affecting the subsequent normal lifting and lowering of the blanking plate 16.

[0053] The first receiving frame 21, the second receiving frame 22 and the third receiving frame 23 are provided to collect the sieved rice respectively.

[0054] By providing the first material guiding portion 24, the second material guiding portion 25 and the third material guiding portion 26, it is ensured that the sieved rice can accurately fall into the corresponding material receiving frame.

[0055] By providing the filter screen 5a, it is prevented that the vacuum cleaner 5b absorbs the broken rice with a smaller particle size into the vacuum cleaner 5b, causing the loss of rice.

[0056] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0057] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. An automated rice processing equipment for grading and screening, characterized in that: The invention comprises a machine body (1), a dust removal assembly (2) arranged on the machine body (1), and a screening assembly (3) arranged on the machine body (1), wherein the dust removal assembly (2) comprises a first through pipe (2a) arranged horizontally on the machine body (1) and a blower (2b) arranged at one end of the first through pipe (2a), an end of the first through pipe (2a) close to the blower (2b) being connected to a feed hopper (4) in a vertical direction, an end of the first through pipe (2a) away from the blower (2b) being provided with a dust collecting member (5), an end of the first through pipe (2a) close to the dust collecting member (5) being connected to a discharge pipe (6) in a vertical downward direction, and the screening assembly (3) comprises a first through pipe (2a) connected to the blower (2b) and a second through pipe (6) connected to the first through pipe (2a). A second through pipe (3a) connected to the bottom end of a feeding tube (6) and a first feeding hole (3b) provided at one end of the second through pipe (3a) away from the feeding tube (6), a first feeding portion (7) and a second feeding portion (8) are sequentially provided at the bottom of the second through pipe (3a), second feeding holes (9) are evenly provided on the first feeding portion (7), and third feeding holes (10) are evenly provided on the second feeding portion (8), the aperture of the second feeding hole (9) is smaller than the aperture of the third feeding hole (10), the first feeding portion (7) is located at one end of the second through pipe (3a) close to the feeding tube (6), and a pushing mechanism (11) for pushing one meter is provided in the second through pipe (3a).

2. The automatic rice processing equipment for grading and screening according to claim 1, characterized in that: The cross-section of the second through tube (3a) is circular, and the pushing mechanism (11) comprises a pushing rod (11a) rotatably arranged in the second through tube (3a) and a driving motor (11b) arranged on the second through tube (3a) for driving the pushing rod (11a) to rotate, and a plurality of pushing plates (12) are evenly arranged on the pushing rod (11a), and the pushing plates (12) can be movably fitted to the inner wall of the second through tube (3a).

3. The automatic rice processing equipment for graded screening according to claim 2, characterized in that: The second through pipe (3a) is arranged obliquely downward on the machine body (1), and the horizontal plane at one end of the second through pipe (3a) close to the discharge pipe (6) is higher than the horizontal plane at one end of the second through pipe (3a) close to the first discharge hole (3b).

4. The automatic rice processing equipment for grading and screening according to claim 3 is characterized in that: A circular arc-shaped baffle plate (13) is provided at the bottom of the second through pipe (3a) in a direction perpendicular to the central axis of the second through pipe (3a); the baffle plate (13) is located between the first unloading portion (7) and the second unloading portion (8); and a rotating groove (14) matching with the baffle plate (13) is provided on the push plate (12).

5. The automatic rice processing equipment for grading and screening according to claim 4 is characterized in that: The longitudinal cross-section of the first through-tube (2a) is rectangular. The first through-tube (2a) comprises a bottom plate (15) arranged at the bottom of the first through-tube (2a). A discharge plate (16) is hingedly provided at one end of the bottom plate (15) close to the discharge tube (6). Both sides of the discharge plate (16) are movably fitted to the inner wall of the first through-tube (2a). A discharge mechanism (17) is provided on the second through-tube (3a) for driving the discharge plate (16) to rise and fall at one end close to the blower (2b).

6. The automatic rice processing equipment for grading and screening according to claim 5, characterized in that: The second through-tube (3a) is located directly below the first through-tube (2a), and the unloading mechanism (17) comprises a lifting groove (17a) provided on the top of the second through-tube (3a) in a direction perpendicular to the central axis of the second through-tube (3a) and a lifting block (17b) matched with the lifting groove (17a), the bottom of the lifting block (17b) is arc-shaped, and a lifting rod (18) is provided on the lifting block (17b) in a direction perpendicular to the central axis of the second through-tube (3a), and the top of the lifting rod (18) is movable. The lifting block (17b) passes through the bottom plate (15) and is movably attached to the unloading plate (16); a return spring (19) is arranged between the bottom of the bottom plate (15) and the top of the lifting block (17b); the lifting rod (18) movably passes through the return spring (19); when the pushing plate (12) rotates, the pushing plate (12) can push the lifting block (17b) to move in a direction away from the second through pipe (3a); when the return spring (19) is at its original length, the bottom of the lifting block (17b) is located in the second through pipe (3a).

7. The automatic rice processing equipment for grading and screening according to claim 6 is characterized in that: An elastic soft belt (20) is arranged between one end of the blanking plate (16) close to the blower (2b) and the inner wall of the first through pipe (2a), and the width of the elastic soft belt (20) is consistent with the width of the blanking plate (16).

8. The automatic rice processing equipment for grading and screening according to claim 1, characterized in that: The machine body (1) is provided with a first material receiving frame (21), a second material receiving frame (22) and a third material receiving frame (23); the first material receiving frame (21) is located below the first material discharge hole (3b); the second material receiving frame (22) is located directly below the second material discharge hole (9); and the third material receiving frame (23) is located directly below the third material discharge hole (10).

9. The automatic rice processing equipment for grading and screening according to claim 8, characterized in that: A first material guide portion (24) which is wider at the top and narrower at the bottom is provided at one end of the second through pipe (3a) away from the material discharge pipe (6), a second material guide portion (25) which is wider at the top and narrower at the bottom is provided on the outer wall of the first material discharge portion (7), and a third material guide portion (26) which is wider at the top and narrower at the bottom is provided on the outer wall of the second material discharge portion (8).

10. The automatic rice processing equipment for grading and screening according to claim 1, characterized in that: The dust collecting member (5) comprises a filter screen (5a) vertically arranged at the end of the first through pipe (2a) and a dust collector (5b) connected to the filter screen (5a).

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