A rice processing and screening apparatus

Abstract

The application relates to a rice processing and screening device, which comprises a rack, a screening device arranged on the rack, a drum screen rotatingly borne on the rack, a cleaning mechanism arranged on the rack, a cleaning assembly, an air channel and a water channel, the air channel and the water channel being arranged on the rack along the length direction of the drum screen, the air channel being located on one side of the water channel, the air channel being connected with an air source, the water channel being connected with a water source, a plurality of air holes being formed in the length direction of the side of the air channel facing the drum screen, a plurality of flow-through holes being formed in the length direction of the side of the water channel facing the drum screen, a first nozzle being arranged on each of the air holes, and a second nozzle being arranged on each of the flow-through holes; compressed air is sprayed along the first nozzle when the first nozzle is opened, and water is sprayed along the second nozzle when the second nozzle is opened. The application has the effect of improving the efficiency of rice screening.

Description

Technical Field

[0001] This application relates to the field of rice production, and in particular to a rice processing and screening device. Background Technology

[0002] In the rice processing, paddy first passes through equipment such as vibrating screens and destoners to remove impurities such as sand, gravel, and straw. It then enters the hulling process, where the husk is removed by friction with rubber rollers or centrifugal force, producing a mixture of brown rice and husk. Next, a paddy-hulled separator is used to separate the unhulled paddy from the brown rice and process them in a cycle. The brown rice then enters multiple rice milling machines, where the bran and germ are gradually removed by the grinding action of iron rollers or sand rollers, forming white rice and separating the bran. In the refining stage, a polishing machine polishes the surface of the rice grains to enhance their gloss and extend their shelf life, ultimately producing a variety of products that meet market standards, such as refined white rice, germ-retained rice, or brown rice.

[0003] In actual production, due to the influence of the rice's own quality and uncontrollable mechanical factors, rice of different sizes may exist in the same batch, which will affect the overall quality of the rice. Therefore, after the rice is refined, it still needs to be screened to separate high-quality rice grains.

[0004] A current screening device uses a drum-shaped screen to screen rice. In operation, the rice to be screened is poured into the drum-shaped screen, and the screen rotates due to the drive mechanism. During rotation, several holes are provided on the screen for broken or smaller rice grains to pass through. Unsuitable grains fall through these holes, while suitable grains are separated by the centrifugal force exerted by the screen and pass through its outlet. However, over time, some grains become stuck in the holes, reducing the overall screening efficiency of the drum-shaped screen. Operators must periodically remove these stuck grains, resulting in low efficiency and room for improvement. Utility Model Content

[0005] In order to improve the efficiency of rice screening, this application provides a rice processing screening device.

[0006] The rice processing and screening equipment provided in this application adopts the following technical solution: A rice processing and screening device includes a frame and screening equipment mounted on the frame, as well as a rotatable drum screen supported on the frame. The screening equipment drives the drum screen to rotate along the frame. A cleaning mechanism is provided on the frame, and the cleaning mechanism includes a cleaning component. The cleaning component includes an air channel and a water channel. The air channel and the water channel are arranged on the frame along the length of the drum screen. The air channel is located on one side of the water channel. The air channel is connected to an external air source, and the water channel is connected to an external water source. The air channel has a plurality of air holes along its length facing the drum screen, and the water channel has a plurality of flow holes along its length facing the drum screen. Each of the air holes is provided with a first nozzle, and each of the flow holes is provided with a second nozzle. When the first nozzle is opened, compressed air is sprayed out along the first nozzle, and when the second nozzle is opened, water is sprayed out along the second nozzle.

[0007] By adopting the above technical solution, the air and water channels set along the length of the drum screen allow the first nozzle to remove rice grains stuck on the screen, returning them to the drum screen and achieving the purpose of removing rice grains stuck on the screen. At the same time, water can be sprayed onto the drum screen through the second nozzle, allowing starch and other substances adhering to the drum screen to be washed away. This helps improve the overall cleanliness of the drum screen, reduces the need for manual cleaning of rice grains stuck in the drum screen holes, and plays a positive guiding role in improving the efficiency of rice screening.

[0008] Preferably, the cleaning mechanism further includes a sweeping assembly, which includes a drive cylinder and a sweeping brush. The drive cylinder is mounted on the frame, and the sweeping brush is connected to the piston rod of the drive cylinder. The piston rod of the drive cylinder is used to control the sweeping brush to move closer to or away from the drum screen.

[0009] By adopting the above technical solution, the cleaning brush is controlled by the driving cylinder to get close to the surface of the drum screen, thereby achieving the purpose of cleaning the drum screen by the cleaning brush and playing a positive guiding role in maintaining the unobstructed flow of the holes on the drum screen.

[0010] Preferably, the rotary screen is provided with a discharge port, and a discharge gate is provided at the discharge port. The discharge gate is hinged to the discharge port and is used to control the opening or closing of the discharge port.

[0011] By adopting the above technical solution, since the discharge gate and the discharge port are in a hinged state, it is easy to open the discharge gate along the discharge port, thereby realizing the rapid removal of rice grains that have returned to the drum screen after being cleared by the first nozzle, which is simple to operate.

[0012] Preferably, a rubber strip is provided on the side wall where the discharge port abuts against the discharge gate.

[0013] By adopting the above technical solution, the sealing strip helps to improve the sealing performance between the discharge gate and the discharge port, and reduces the probability of rice grains that meet the requirements flowing out through the gap between the discharge gate and the discharge port in the drum screen.

[0014] Preferably, a first screen is provided on the frame located below the drum screen. The first screen is used to perform secondary screening of the rice grains screened along the drum screen. The holes on the first screen are smaller than the holes on the drum screen.

[0015] By adopting the above technical solution, the rice grains after being screened along the drum screen are classified into secondary grades through the first screen. The first screen helps to filter out rice grains that do not meet the requirements and improves the utilization value of broken rice.

[0016] Preferably, the frame is provided with a sliding groove, and the first screen slides and engages with the sliding groove.

[0017] By adopting the above technical solution, the first screen can slide and cooperate with the frame through the sliding groove, so that the operator can remove the first screen along the frame or install the first screen on the frame. The operation is simple and the stability is high.

[0018] Preferably, a magnetic lock is provided on the wall of the sliding trough, the magnetic lock being electrically connected to the controller of the screening equipment, and the magnetic lock being used to fix the first screen.

[0019] By adopting the above technical solution, the first screen is fixed by a magnetic lock without the need for other mechanical structures, which helps to improve the stability of the first screen when it is installed on the frame.

[0020] Preferably, a conical hopper is provided on the frame located below the first screen, the conical hopper being used to collect water and / or rice grains sieved out along the first screen.

[0021] By adopting the above technical solution, the water flow and / or broken rice are guided to fall in a concentrated manner through a conical hopper, and the water and / or broken rice are collected uniformly, reducing the probability of splashing during the falling process.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. Through the air and water channels set along the length of the drum screen, the first nozzle can remove rice grains stuck on the screen and return them to the drum screen, thus achieving the purpose of removing rice grains stuck on the screen. At the same time, water can be sprayed onto the drum screen through the second nozzle, so that starch and other substances adhering to the drum screen can be washed away. This helps to improve the overall cleanliness of the drum screen, reduces the need for manual cleaning of rice grains stuck in the holes of the drum screen, and plays a positive guiding role in improving the efficiency of rice screening. 2. Because the discharge gate and the discharge port are in a hinged state, it is easy to open the discharge gate along the discharge port, so as to quickly remove the rice grains that have returned to the drum screen after being cleared by the first nozzle along the drum screen, making the operation simple; 3. The first screen is used to perform secondary grading of rice grains after they have been sieved along the drum screen. The first screen helps to filter out rice grains that do not meet the requirements, which helps to improve the utilization value of broken rice. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a rice processing and screening device according to an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the structure of a rice processing and screening device with the drum screen hidden, according to an embodiment of this application.

[0025] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Screening mechanism; 3. Drum screen; 31. Discharge port; 311. Discharge gate; 4. Cleaning mechanism; 41. Cleaning component; 411. Air passage; 412. Water passage; 42. Cleaning component; 421. Drive cylinder; 422. Cleaning brush; 5. Air hole; 6. Flow hole; 7. First nozzle; 8. Second nozzle; 9. First screen; 10. Sliding trough; 101. Conical hopper; 102. Support plate. Detailed Implementation

[0026] First, it should be noted that the screening mechanism 2 is used to drive the drum screen 3 to rotate along the frame 1, and to achieve the purpose of screening the rice in the drum screen 3 through centrifugal force. It is an existing rice processing equipment, and its specific feeding method and components will not be described in detail in this embodiment.

[0027] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0028] This application discloses a rice processing and screening device. (Refer to...) Figure 1 and Figure 2A rice processing and screening device includes a frame 1 and a screening mechanism 2 mounted on the frame 1, and a rotary drum screen 3 rotatably supported on the frame 1. The screening mechanism 2 drives the rotary drum screen 3 to rotate along the frame 1. A cleaning mechanism 4 is also provided on the frame 1. The cleaning mechanism 4 includes an air channel 411 and a water channel 412. The air channel 411 and the water channel 412 are arranged on the frame 1 along the length of the rotary drum screen 3. The air channel 411 is located on one side of the water channel 412. The air channel 411 is connected to an air source, and the water channel 412 is connected to a water source. The side of the air channel 411 facing the rotary drum screen 3 has a plurality of flow holes 6 along its length. Each of the plurality of air holes 5 is provided with a first nozzle 7, and each of the plurality of flow holes 6 is provided with a second nozzle 8. When the first nozzle 7 is opened, compressed air is sprayed out along the first nozzle 7. When the second nozzle 8 is opened, water is sprayed out along the second nozzle 8.

[0029] Specifically, the outer contour of the drum screen 3 is cylindrical, and its interior is hollow, forming a cavity that can hold rice. The surface of the drum screen 3 has several holes along the circumference. The outline size of the holes is smaller than the size of the whole rice grains, so as to limit the whole rice grains from falling through the holes.

[0030] It should be noted that the screening mechanism 2 and the drum screen 3 are existing devices used for rice screening, and their specific composition, working principle and installation method will not be described in detail here.

[0031] Meanwhile, both air passage 411 and water passage 412 are made of metal tubing, giving them pressure-bearing capacity.

[0032] Furthermore, the air source connected to the air passage 411 can be an air compressor, which fills the air passage 411 with compressed gas; the water source connected to the water passage 412 can be a water pump, which injects water through the inlet of the water pump and gives the water a certain pressure through the outlet of the water pump.

[0033] Correspondingly, the first nozzle 7 and the second nozzle 8 are used to spray gas and water, respectively. These are existing components, and their specific composition and working principle will not be described in detail here.

[0034] It should also be noted that the specific number of the aforementioned air holes 5 and flow holes 6 can be increased or decreased according to the actual length of the air passage 411 or water passage 412, and their specific numbers will not be detailed here.

[0035] Therefore, when the drum screen 3 becomes clogged and needs cleaning, the operator can connect the air passage 411 to the air source. At this time, compressed gas is filled into the air passage 411. After the compressed gas is filled into the air passage 411, the first nozzle 7 will be in the open state. At this time, the operator controls the screening mechanism 2 to drive the drum screen 3 to rotate, thereby achieving the purpose of removing the rice stuck in the holes and playing a positive guiding role in reducing the amount of rice stuck in the holes.

[0036] Furthermore, as the amount and time of rice sieving by the drum screen 3 increase, due to the influence of rolling friction, substances such as rice bran and protein on the surface of the rice will adhere to the drum screen 3. At this time, the air channel 411 can be activated. When the sieving mechanism 2 drives the drum screen 3 to rotate, water sprayed through the second nozzle 8 cleans the drum screen 3. After the drum screen 3 is cleaned, the air channel 411 can be activated to quickly dry the drum screen 3 with compressed gas, which plays a positive guiding role in improving the overall cleanliness of the drum screen 3.

[0037] Reference Figure 1 and Figure 2 The cleaning mechanism 4 also includes a cleaning component 42, which includes a drive cylinder 421 and a cleaning brush 422. The drive cylinder 421 is mounted on the frame 1, and the cleaning brush 422 is connected to the piston rod of the drive cylinder 421. The piston rod of the drive cylinder 421 is used to control the cleaning brush 422 to move closer to or away from the drum screen 3.

[0038] Specifically, the drive cylinder 421 is mounted horizontally on the frame 1, with the piston rod of the drive cylinder 421 facing the drum screen 3. The piston cylinder end of the drive cylinder 421 is fixedly connected to the support plate 102, and the cleaning brush 422 is fixed to the support plate 102 by bolts, so that the cleaning brush 422 can be detached along the support plate 102. At the same time, the cleaning brush 422 can be a bristle brush to increase the contact area between the cleaning brush 422 and the drum screen 3 and improve the cleaning efficiency.

[0039] Therefore, by driving the cleaning brush 422 to approach or move away from the surface of the drum screen 3 through the driving cylinder 421, it plays a positive guiding role in maintaining the unobstructed flow of the holes on the drum screen 3.

[0040] Reference Figure 1 and Figure 2 The drum screen 3 is provided with a discharge port 31, and a discharge gate 311 is provided at the discharge port 31. The discharge gate 311 is hinged to the discharge port 31 and is used to control the opening or closing of the discharge port 31.

[0041] The discharge port 31 is formed by penetrating the side wall of the drum screen 3. The outline of the discharge gate 311 is adapted to the outline of the discharge port 31. The discharge gate 311 can be connected to the discharge port 31 by a hinge. The end of the discharge gate 311 away from the hinged discharge port 31 can be fixed to the drum screen 3 by a pin. This ensures that the discharge gate 311 and the drum screen 3 can be well fixed when the drum screen 3 rotates, reducing the probability that the discharge gate 311 will open due to unstable cooperation between the discharge gate 311 and the drum screen 3 when the drum screen 3 rotates.

[0042] Therefore, when the rice stuck in the drum screen 3 is flushed into the drum screen 3 through the cooperation of the air passage 411 and the water passage 412, the operator can open the discharge door 311, which will allow the rice grains in the drum screen 3 to fall out along the drum screen 3, making the operation simple.

[0043] Correspondingly, a rubber strip is provided on the side wall where the discharge port 31 and the discharge gate 311 abut. The rubber strip can be made of silicone material, which makes it soft and easy to deform. The sealing of the rubber strip helps to improve the sealing between the discharge gate 311 and the discharge port 31, and helps to reduce the probability of rice grains that meet the requirements flowing out through the gap between the discharge gate 311 and the discharge port 31 in the drum screen 3.

[0044] Reference Figure 1 and Figure 2 A first screen 9 is provided on the frame 1 located below the drum screen 3. The first screen 9 is used to perform secondary screening of the rice grains screened along the drum screen 3. The holes on the first screen 9 are smaller than the holes on the drum screen 3.

[0045] Its function is to perform secondary grading of rice grains after sieving along the drum screen 3 through the first screen 9. The first screen 9 helps to filter out rice grains that do not meet the requirements and improves the utilization value of broken rice.

[0046] The frame 1 is provided with a sliding groove 10, and the first screen 9 slides and engages with the sliding groove 10. The sliding groove 10 is located on the frame 1 below the drum screen 3 and is formed along the length of the frame 1. The first screen 9 slides and engages with the frame 1 through the sliding groove 10, so that the operator can remove the first screen 9 along the frame 1 or install the first screen 9 on the frame 1. The operation is simple and the stability is high.

[0047] Correspondingly, a magnetic lock is provided on the wall of the sliding groove 10. The magnetic lock is electrically connected to the controller of the screening mechanism 2. The magnetic lock is used to fix the first screen 9. The magnetic lock is a device that uses the principle of generating a magnetic field by passing an electric current through a coil to generate a magnetic attraction or repulsion force. When the magnetic lock is energized, it can attract iron or magnetic objects. When the magnetic lock is de-energized, the attraction between the magnetic lock and the iron or magnetic objects disappears. This is existing technology and will not be described in detail here.

[0048] Therefore, fixing the first screen 9 with a magnetic lock, without the need for other mechanical structures, helps to improve the stability of the first screen 9 when it is installed on the frame 1.

[0049] Reference Figure 1 and Figure 2 A conical hopper 101 is provided on the frame 1 located below the first screen 9. The conical hopper 101 is used to collect water and / or rice grains that have been dried along the first screen 9.

[0050] The conical hopper 101 is formed by welding together metal plates, and the bottom of the conical hopper 101 is open. The conical hopper 101 guides the water flow and / or broken rice to fall in a concentrated manner, and collects the water and / or broken rice in a unified manner, reducing the probability of splashing during the falling process.

[0051] The implementation principle of a rice processing screening mechanism 2 in this application embodiment is as follows: through the air passage 411 and water passage 412 set along the length of the drum screen 3, the first nozzle 7 can remove the rice grains stuck on the screen and return them to the drum screen 3, thus achieving the purpose of removing the rice grains stuck on the screen. At the same time, water can be sprayed onto the drum screen 3 through the second nozzle 8, so that starch and other substances adhering to the drum screen 3 can be washed off, which helps to improve the overall cleanliness of the drum screen 3, reduces the necessity of manual cleaning of rice grains stuck in the holes of the drum screen 3, and plays a positive guiding role in improving the efficiency of rice screening.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rice processing screening device, comprising a frame (1) and a screening mechanism (2) disposed on the frame (1), and a rotary drum screen (3) rotatably supported on the frame (1), wherein the screening mechanism (2) is used to drive the rotary drum screen (3) to rotate along the frame (1), characterized in that: A cleaning mechanism (4) is provided on the frame (1). The cleaning mechanism (4) includes a cleaning component (41). The cleaning component (41) includes an air duct (411) and a water duct (412). The air duct (411) and the water duct (412) are arranged on the frame (1) along the length direction of the drum screen (3). The air duct (411) is located on one side of the water duct (412). The air duct (411) is connected to an external air source, and the water duct (412) is connected to an external water source. The air duct (411) faces the direction of the drum screen (3). The drum screen (3) has several air holes (5) along its length on one side. The water channel (412) has several flow holes (6) along its length on the side facing the drum screen (3). Each of the air holes (5) is provided with a first nozzle (7), and each of the flow holes (6) is provided with a second nozzle (8). When the first nozzle (7) is opened, compressed air is sprayed out along the first nozzle (7). When the second nozzle (8) is opened, water is sprayed out along the second nozzle (8).

2. The rice processing and screening equipment according to claim 1, characterized in that: The cleaning mechanism (4) further includes a cleaning assembly (42), which includes a drive cylinder (421) and a cleaning brush (422). The drive cylinder (421) is mounted on the frame (1), and the cleaning brush (422) is connected to the piston rod of the drive cylinder (421). The piston rod of the drive cylinder (421) is used to control the cleaning brush (422) to approach or move away from the drum screen (3).

3. The rice processing and screening equipment according to claim 2, characterized in that: The drum screen (3) is provided with a discharge port (31), and a discharge gate (311) is provided at the discharge port (31). The discharge gate (311) is hinged to the discharge port (31), and the discharge gate (311) is used to control the opening or closing of the discharge port (31).

4. The rice processing and screening equipment according to claim 3, characterized in that: A rubber strip is provided on the side wall where the discharge port (31) abuts against the discharge gate (311).

5. The rice processing and screening equipment according to claim 4, characterized in that: A first screen (9) is provided on the frame (1) located below the drum screen (3). The first screen (9) is used to perform secondary screening of the rice grains screened along the drum screen (3). The holes on the first screen (9) are smaller than the holes on the drum screen (3).

6. The rice processing and screening equipment according to claim 5, characterized in that: The frame (1) is provided with a sliding groove (10), and the first screen (9) slides and cooperates with the sliding groove (10).

7. The rice processing and screening equipment according to claim 6, characterized in that: A magnetic lock is provided on the wall of the sliding trough (10). The magnetic lock is electrically connected to the controller of the screening mechanism (2). The magnetic lock is used to fix the first screen (9).

8. The rice processing and screening equipment according to claim 7, characterized in that: A conical hopper (101) is provided on the frame (1) located below the first screen (9), the conical hopper (101) being used to collect water and / or rice grains sieved out along the first screen (9).

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