Rice surface polishing device for rice processing

Abstract

The invention relates to the technical field of rice processing, in particular to a rice surface polishing device for rice processing, which comprises a screw conveyor, a vertical base positioned on the side surface of a feed port of the screw conveyor, a stirring and grinding part arranged on the vertical base, and a conveying channel with the upper end connected with a discharge port of the screw conveyor, the barreling part is connected with the lower end of the conveying channel, the air impact grinding part is connected with the barreling part, the conveying belt is arranged below the air impact grinding part, multiple polishing links are conducted on rice in sequence, and fixed polishing standards are not set, so that the phenomenon of over-polishing or under-polishing is effectively prevented, meanwhile, the thoroughness of polishing is guaranteed, and the polishing quality is improved. According to the rice polishing device, the defect that rice grains cannot be polished is overcome, and the rice grains are subjected to protective polishing operation, so that the rice grains are well prevented from being subjected to over-strong rigid collision, the broken rice rate is effectively reduced, and the rice quality is guaranteed as much as possible.

Description

Technical Field

[0001] The present invention relates to the technical field of rice processing, and more particularly, to a rice surface polishing device for rice processing. Background Art

[0002] Rice, also known as paddy rice, is a food made from paddy after processes such as cleaning, hulling, milling, and finished product finishing. Rice is the main food for people in most parts of China. During the rice processing, surface polishing is one of the core processes to improve the quality of rice grains. By removing the bran layer and surface impurities, the appearance gloss, taste, and storage stability of rice can be significantly improved.

[0003] Existing polishing equipment generally uses fixed structures such as polishing rollers or sand rollers to perform the polishing operation. However, the gap between the rollers of these devices cannot be dynamically adjusted according to the difference in the particle size of the rice grains, and the standard of single - time polishing is fixed. Therefore, there will be phenomena of local over - polishing or under - polishing. Small - particle - size rice grains are not thoroughly polished due to insufficient contact pressure, while large - particle - size rice grains are damaged on the surface due to excessive friction, thus significantly reducing the finished product grade. Moreover, during processing, rigid friction sources such as high - speed rotating polishing rollers or sand rollers are in direct contact with the rice grains, resulting in rigid collisions, which easily cause internal stress concentration in the rice grains during high - speed friction and lead to cracking, thus increasing the broken rice rate and reducing the quality of rice. At the same time, due to the existence of flow dead - ends in the polishing cavity of the existing equipment, some rice grains are not thoroughly polished due to limited circulation paths. Summary of the Invention

[0004] The purpose of the present invention is to provide a rice surface polishing device for rice processing to solve the above problems.

[0005] To achieve the above purpose, the present invention provides a rice surface polishing device for rice processing, including: a screw conveyor, a vertical base located on the side of the feed inlet of the screw conveyor, a stirring and grinding part arranged on the vertical base, a conveying channel with its upper end connected to the discharge outlet of the screw conveyor, a rolling and grinding part connected to the lower end of the conveying channel, a gas impact and grinding part connected to the rolling and grinding part, a conveyor belt arranged below the gas impact and grinding part, and the conveying surface of the conveyor belt is close to the end of the gas impact and grinding part, a surrounding frame installed on the conveyor belt, and a negative - pressure cleaning mechanism installed on the conveyor belt and located in front of the gas impact and grinding part;

[0006] The gas impact and grinding part is partially recessed into the surrounding frame, wherein:

[0007] The stirring and grinding part is driven to rotate and stir inside the piled - up rice so that the surface of the rice is rubbed;

[0008] The rolling and grinding part can promote the multi-directional rolling and sliding of rice within a certain space range, so that the rice undergoes multiple frictions within the rolling and grinding part;

[0009] The air impact grinding part is suitable for promoting the friction of rice by means of multiple jumping impacts actively;

[0010] The negative pressure cleaning mechanism is suitable for sucking away impurities in the rice fully during the process of the conveyor belt transporting the rice.

[0011] Further, the rolling and grinding part includes a round dish with an upper notch and a lower notch on its circumferential surface, and the upper notch and the lower notch on the round dish are collinear. A side cover is threadedly connected to the opening of the round dish, a first motor is installed on the side cover, a central shaft rod is rotatably installed at the center of the side cover through a bearing, and the central shaft rod extends into the round dish. The output shaft of the first motor is connected to the central shaft rod. A number of partition plates are circumferentially installed on the peripheral side of the central shaft rod, and a number of polishing layers are respectively laid on the inner wall of the round dish and the front and back surfaces of a number of the partition plates;

[0012] The upper notch of the round dish is connected to the lower end of the conveying channel;

[0013] A number of the partition plates can divide the interior of the round dish into multiple independent spaces of equal size.

[0014] Further, a number of the polishing layers are all sponge sandpapers.

[0015] Further, the air impact grinding part includes a lower guiding channel connected to the lower notch of the round dish, and the tail of the lower guiding channel is arc-shaped. A ceiling is installed on the front side of the lower guiding channel, a number of suspension thin rods are connected to the bottom surface of the ceiling, a number of grinding balls are respectively installed in pairs at the bottoms of a number of the suspension thin rods, and a number of the grinding balls are located at the outlet of the lower guiding channel. An introducing channel is communicated with the middle part of the lower guiding channel, and a first air duct is connected to one end of the introducing channel;

[0016] The other end of the first air duct is connected to the air outlet of a first external blower;

[0017] A number of the grinding balls are close to the conveying surface of the conveyor belt;

[0018] The surrounding frame encloses a number of the grinding balls and the tail of the lower guiding channel.

[0019] Further, a number of the grinding balls are distributed in multiple rows from high to low;

[0020] Between every two rows of a number of the grinding balls, they are cross-distributed.

[0021] Further, a notch is formed on each of a set of opposite surfaces of the conveying channel. An air blowing channel communicating with the conveying channel through one of the notches, a second air duct having one end connected to the air blowing channel and the other end connected to the air outlet of a second external blower, and a dust collection box installed at the other notch;

[0022] The air blowing channel faces the dust collection box.

[0023] Further, the negative pressure cleaning mechanism includes a cover body installed on the conveyor belt, a long groove formed on the side surface of the cover body, a strip handle slidably installed in the long groove and inserted into the cover body, a brush installed at the bottom of the strip handle, a support table installed on the side surface of the conveyor belt, a first electric push rod arranged on the support table, and the output end of the first electric push rod is connected to the part of the strip handle extending outside the cover body, and two suction pipes with one end communicated with the top of the cover body;

[0024] The other ends of the two suction pipes are connected to an external dust collection device;

[0025] The brush is close to the conveying surface of the conveyor belt.

[0026] Further, the stirring and grinding part includes a load-bearing column installed on the vertical base, a tray installed on the load-bearing column, a barrel arranged on the tray, a second electric push rod installed on the top of the vertical base, a wide groove vertically formed on the vertical base, a right-angle mounting plate slidably installed in the wide groove, and the output end of the second electric push rod is connected to the right-angle mounting plate, a second motor installed upside down at the front end of the right-angle mounting plate, a mandrel connected to the output end of the second motor, and two groups of a plurality of polishing rods mirror-mounted on the side surface of the mandrel;

[0027] Two groups of a plurality of the polishing rods are inserted into the barrel, and the end surfaces of the two groups of a plurality of the polishing rods are in contact with the inner side wall of the barrel.

[0028] Further, the stirring and grinding part further includes a spike head installed at the bottom of the mandrel and a plurality of triangular strips installed on the mandrel;

[0029] A plurality of the triangular strips are respectively located above a plurality of the polishing rods.

[0030] Further, a limiting vertical plate is connected to the front end of the load-bearing column, a positioning rod is slidably inserted on the limiting vertical plate, and the positioning rod is inserted into the vertical base;

[0031] The load-bearing column is rotatably installed on the vertical base;

[0032] A handle is installed on the top of the barrel.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The rice surface polishing device for rice processing can stir the accumulated rice reciprocatingly through the stirring and grinding part, and can expand the stirring range through up and down movement, so as to fully stir the inside of the rice, and utilize the extrusion friction during stirring to realize the polishing of the rice surface. At the same time, when the screw conveyor conveys the current batch of rice and performs the subsequent polishing step, the stirring and grinding part stores the next batch of rice and pre-polishes it, and after the screw conveyor conveys the current batch of rice, the stirring and grinding part can quickly dump the stored rice into the screw conveyor, which not only greatly facilitates the loading and improves the efficiency, but also makes the whole polishing process more thorough, and effectively improves the polishing effect;

[0035] 2. The rice surface polishing device for rice processing can receive rice through the rolling part and create multiple polishing areas for the rice, driving the rice to continuously roll and slide back and forth in a space of a certain size, thereby causing the rice to continuously rub against the polishing area, thereby removing the bran layer and impurities on the surface of the rice, thereby achieving the purpose of polishing;

[0036] 3. The rice surface polishing device for rice processing can relay the rice polished by the roller grinding part through the air impact grinding part, and can accelerate the rice with a strong airflow during the conveying process, so that the rice hits the grinding light source and jumps between the grinding light sources to cause multiple frictions, thereby further deepening the polishing effect, continuously removing the bran layer and impurities on the rice surface, and ensuring the polishing quality and uniform and thorough polishing;

[0037] 4. The rice surface polishing device for rice processing can, after polishing the rice, stir up the bran layer and impurities mixed in the rice in the process of conveying the rice on the conveyor belt through the negative pressure cleaning mechanism, and then perform suction treatment on them, so as to clean up the removed bran layer and impurities, ensure the cleanliness of the rice, and improve the processing link;

[0038] 5. The rice surface polishing device for rice processing performs multiple polishing steps on rice in sequence, does not set a fixed polishing standard, optimizes the overall polishing transmission path, and effectively prevents over-grinding or under-grinding to prevent the rice from causing the product grade to decline due to the polishing process. At the same time, the thoroughness of the polishing is guaranteed to avoid the defect that some rice grains cannot be polished, and a protective polishing operation is performed on the rice, thereby well preventing the rice grains from having an excessively strong rigid collision, thereby effectively reducing the broken rice rate and ensuring the rice quality as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0040] Figure 1 Shows a perspective view of the present invention;

[0041] Figure 2 Shows a second perspective view of the present invention;

[0042] Figure 3 Shows a third perspective view of the present invention;

[0043] Figure 4 Shows a fourth perspective view of the present invention;

[0044] Figure 5 Shows a fifth perspective view of the present invention;

[0045] Figure 6 Shows a sixth perspective view of the present invention;

[0046] Figure 7 Shows a seventh perspective view of the present invention;

[0047] Figure 8 Shows a partial front view of the present invention;

[0048] Figure 9 Shows the present invention Figure 2 An enlarged view of part A;

[0049] Figure 10 Shows the present invention Figure 4 An enlarged view of part B;

[0050] Figure 11 Shows the present invention Figure 5 An enlarged view of part C;

[0051] Figure 12 Shows the present invention Figure 6 An enlarged view of part D;

[0052] Figure 13 Shows the present invention Figure 6 An enlarged view of part E;

[0053] Figure 14 Shows the present invention Figure 7 An enlarged view of part F.

[0054] In the figures, the same reference numerals denote the same structural elements, where:

[0055] 1. Screw conveyor; 2. Vertical base; 3. Stirring and grinding part; 31. Load-bearing column; 32. Tray; 33. Barrel body; 34. Second electric push rod; 35. Wide groove; 36. Right-angle mounting plate; 37. Second motor; 38. Core shaft; 39. Polishing rod; 391. Spiked head; 392. Triangular strip; 4. Conveying channel; 5. Rolling and grinding part; 51. Round dish; 52. Side cover; 53. First motor; 54. Central shaft rod; 55. Partition board; 56. Polishing layer; 6. Air impact grinding part; 61. Lower guiding channel; 62. Ceiling; 63. Suspended thin rod; 64. Grinding ball; 65. Introducing channel; 66. First air duct; 7. Conveyor belt; 8. Enclosing frame; 9. Negative pressure cleaning mechanism; 91. Cover body; 92. Strip handle; 93. Brush; 94. Support platform; 95. First electric push rod; 96. Suction pipe; 10. Blowing-in channel; 11. Second air duct; 12. Dust collection box; 13. Limit vertical plate; 14. Positioning rod; 15. Handle. Detailed implementation mode

[0056] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only showing the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0057] As Figure 1-14 shown, a rice surface polishing device for rice processing includes: a screw conveyor 1, a vertical base 2 located on the side of the feed inlet of the screw conveyor 1, a stirring and grinding part 3 arranged on the vertical base 2, a conveying channel 4 with its upper end connected to the discharge outlet of the screw conveyor 1, a rolling and grinding part 5 connected to the lower end of the conveying channel 4, an air impact grinding part 6 connected to the rolling and grinding part 5, a conveyor belt 7 arranged below the air impact grinding part 6, and the conveying surface of the conveyor belt 7 is close to the end of the air impact grinding part 6, an enclosing frame 8 installed on the conveyor belt 7, and a negative pressure cleaning mechanism 9 installed on the conveyor belt 7 and located in front of the air impact grinding part 6. The screw conveyor 1 is an existing machine for pushing materials to achieve the purpose, and it can convey horizontally, obliquely or vertically;

[0058] Part of the air impact grinding part 6 is recessed into the enclosing frame 8, wherein:

[0059] The stirring and grinding part 3 is driven to rotate and stir inside the piled-up rice, so that the surface of the rice is rubbed;

[0060] The rolling and grinding part 5 can cause the rice to roll and slide in multiple directions within a certain space range, so that the rice undergoes multiple frictions within the rolling and grinding part 5;

[0061] The air impact grinding part 6 is suitable for causing the rice to actively undergo friction in a manner of multiple jumping impacts;

[0062] The negative pressure cleaning mechanism 9 is suitable for fully absorbing impurities in the rice while the conveyor belt 7 is conveying the rice. The rice surface polishing device for rice processing can reciprocate and stir the accumulated rice through the stirring and grinding part 3, and can expand the stirring range by moving up and down, so as to fully stir the inside of the rice, and use the extrusion friction during stirring to achieve the polishing of the rice surface. At the same time, the stirring and grinding part 3 stores the next batch of rice and pre-polishes it when the screw conveyor 1 conveys the current batch of rice and performs the subsequent polishing step, and After the screw conveyor 1 has conveyed the current batch of rice, the grinding part 3 can quickly dump the stored rice into the screw conveyor 1, which not only greatly facilitates the loading and improves the efficiency, but also makes the whole polishing process more thorough, effectively improving the polishing effect. The rolling grinding part 5 can receive the rice and create multiple polishing areas for the rice, driving the rice to continuously roll and slide back and forth in a space of a certain size, thereby causing the rice to continuously rub against the polishing area, thereby removing the bran layer and impurities on the surface of the rice to achieve the purpose of polishing. The air impact grinding part 6 can The rice polished by the roller grinding part 5 is relayed, and the rice can be accelerated by a strong airflow during the conveying process, so that the rice hits the polishing light source and bounces between the polishing light sources to cause multiple frictions, thereby further deepening the polishing effect, continuously removing the bran layer and impurities on the surface of the rice, and ensuring the polishing quality and uniform and thorough polishing. After the rice is polished, the bran layer and impurities mixed in the rice can be aroused by the negative pressure cleaning mechanism 9 during the process of conveying the rice by the conveyor belt 7, and then the bran layer and impurities are sucked away, thereby cleaning the removed bran layer and impurities, ensuring the quality of the polishing. In order to ensure the cleanliness of rice and improve the processing links, the rice surface polishing device for rice processing performs multiple polishing links on the rice in sequence, does not set a fixed polishing standard, optimizes the overall polishing transmission path, and effectively prevents the occurrence of over-grinding or under-grinding to prevent the rice from causing the product grade to decline due to the polishing process. At the same time, the thoroughness of the polishing is guaranteed to avoid the defect of rice grains that cannot be polished, and a protective polishing operation is performed on the rice, thereby well preventing the rice grains from having excessive rigid collisions, thereby effectively reducing the broken rice rate and ensuring the rice quality as much as possible.

[0063] Optionally, the rolling and grinding part 5 includes a round dish 51 with an upper notch and a lower notch on the circumference, and the upper notch and the lower notch on the round dish 51 are collinear, a side cover 52 threadedly connected to the opening of the round dish 51, a first motor 53 installed on the side cover 52, a central axis rod 54 rotatably installed at the center of the side cover 52 through a bearing, and the central axis rod 54 extends into the round dish 51, an output shaft of the first motor 53 is connected to the central axis rod 54, a plurality of partitions 55 circumferentially installed on the circumference of the central axis rod 54, and a plurality of polishing layers 56 respectively laid on the inner wall of the round dish 51 and on the front and back surfaces of a plurality of the partitions 55;

[0064] The upper notch of the round dish 51 is connected to the lower end of the conveying channel 4;

[0065] The plurality of partitions 55 can divide the interior of the round dish 51 into a plurality of independent spaces of equal size. When the screw conveyor 1 starts to convey rice, the first motor 53 is driven to drive the central shaft 54 and the plurality of partitions 55 to rotate, so that the plurality of partitions 55 rotate along the polished layer 56 in the round dish 51. After the screw conveyor 1 conveys the rice into the conveying channel 4 through its discharge port, the rice continues to enter the round dish 51 through the upper notch of the round dish 51 along the conveying channel 4, and randomly falls into the area divided by the plurality of partitions 55. At this time, the first motor 53 is frequently driven in forward and reverse directions, and the first motor 53 is used to drive the rice stored between the two spaces. The plurality of partitions 55 swing back and forth between the upper notch and the lower notch of the round dish 51, thereby causing the rice to continuously roll and slide back and forth, and rub against the polishing layer 56 on the inner wall of the round dish 51 and the polishing layers 56 on the front and back sides of the plurality of partitions 55, so that the bran layer and impurities on the surface of the rice are removed by friction, thereby achieving the purpose of polishing. After the rice is polished for a certain period of time, the movement path of the plurality of partitions 55 is extended by controlling the first motor 53, so that the plurality of partitions 55 with rice stored therein pass through the lower notch on the round dish 51 in turn, thereby causing the rice to fall downward, and this cycle is repeated to ensure that the rice is thoroughly polished.

[0066] Optionally, several of the polishing layers 56 are sponge sandpapers, which are composed of sponge and abrasives. The sponge serves as a base material, and the abrasives are bonded to the sponge. Therefore, the sponge sandpaper has both softness and polishing effects. While ensuring a good polishing effect, the rice is protectively polished, effectively avoiding excessive rigid collisions of rice grains, thereby effectively reducing the broken rice rate and ensuring the rice quality as much as possible.

[0067] Optionally, the air impact grinding part 6 includes a lower guide channel 61 connected to the lower notch of the round dish 51, and the tail of the lower guide channel 61 is arc-shaped, a ceiling 62 installed on the front side of the lower guide channel 61, a plurality of suspension thin rods 63 connected to the bottom of the ceiling 62, a plurality of polishing balls 64 respectively installed on the bottom of the plurality of suspension thin rods 63 in groups of two, and the plurality of polishing balls 64 are located at the outlet of the lower guide channel 61, connected to the introduction channel 65 in the middle of the lower guide channel 61, and a first air duct 66 with one end connected to the introduction channel 65;

[0068] The other end of the first air duct 66 is connected to the air outlet of the first external blower;

[0069] A plurality of the polishing balls 64 are close to the conveying surface of the conveyor belt 7;

[0070] The frame 8 encloses the polishing balls 64 and the tail of the lower guide channel 61. After the rice falls from the lower notch of the round dish 51, it continues to fall along the lower guide channel 61. At this time, the wind blown out by the first external blower is blown into the lower guide channel 61 through the first air duct 66 and the introduction channel 65 in sequence, so that the rice is carried along the lower guide channel 61 by the strong wind to accelerate the rice. After the rice rushes out of the lower guide channel 61, it hits the polishing balls 64, which causes the rice to actively rub against the polishing balls 64, and further removes the bran layer and impurities on the surface of the rice. The polishing balls 64 are specifically polishing tools with sponge as the base material and abrasives bonded to the sponge. When used, the first external blower can be driven and closed at a fixed time, that is, when rice falls from the lower notch of the round dish 51, the first external blower is driven to start blowing, otherwise the first external blower is kept closed, thereby saving energy.

[0071] Optionally, the polishing balls 64 are distributed in multiple rows from high to low;

[0072] The polishing balls 64 are cross-distributed between every two rows, so that the polishing balls 64 are cross-distributed on the movement trajectory of the rice after it rushes out of the lower guide channel 61, so that the rice can jump in the polishing array composed of the polishing balls 64 during the movement to generate multiple frictions, further deepening the polishing effect, continuously removing the bran layer and impurities on the surface of the rice, ensuring that the surface of the rice can be fully polished, effectively avoiding the occurrence of rice grains that fail to be polished, and further ensuring the polishing quality and the uniformity and thoroughness of the polishing.

[0073] Optionally, notches are formed on a set of opposite faces of the conveying channel 4. An air blowing channel 10 communicating with the conveying channel 4 through one of the notches, a second air duct 11 with one end connected to the air blowing channel 10 and the other end connected to the air outlet of a second external blower, and a dust collecting box 12 installed at the other notch;

[0074] The air blowing channel 10 faces the dust collecting box 12. The dust collecting box 12 contains a charge device etc. The charge device is powered by a power source to generate a high-voltage electrostatic field. Therefore, light and small objects such as dust can be attracted into the dust collecting box 12 under the action of the electrostatic field and adhere to the inside of the dust collecting box 12. When the screw conveyor 1 conveys rice, the rice falls in the conveying channel 4 after coming out of its discharge port. At the same time, the second external blower is driven to start blowing air towards the dust collecting box 12 through the second air duct 11 and the air blowing channel 10. Thus, during the falling process of the rice, the bran layer and impurities that have been separated in the previous polishing process are blown into the dust collecting box 12. The dust collecting box 12 immediately adsorbs the bran layer and impurities to complete the collection. During the process of conveying rice, the removal of the bran layer and impurities from the rice is completed synchronously, ensuring the cleanliness of the rice. At the same time, it prevents the bran layer and impurities from being mixed in the rice and interfering with the subsequent polishing, resulting in affecting the polishing effect; the wind force of the second external blower needs to be regulated within the range that cannot blow the rice.

[0075] Optionally, the negative pressure cleaning mechanism 9 includes a cover body 91 installed on the conveyor belt 7, a long groove formed on the side surface of the cover body 91, a strip handle 92 slidably installed in the long groove and inserted into the cover body 91, a brush 93 installed at the bottom of the strip handle 92, a support table 94 installed on the side surface of the conveyor belt 7, a first electric push rod 95 arranged on the support table 94, and the output end of the first electric push rod 95 is connected to the part of the strip handle 92 extending outside the cover body 91, and two suction pipes 96 with one end communicating with the top of the cover body 91;

[0076] The other ends of the two suction pipes 96 are connected to an external dust suction device;

[0077] The brush 93 is close to the conveying surface of the conveyor belt 7. When the rice comes out of the lower guiding channel 61 and passes through a number of polishing balls 64 and then falls on the conveyor belt 7, the conveyor belt 7 conveys the rice forward. At the same time, an external dust suction device is driven, so that the inside of the cover 91 becomes a negative pressure state through two suction pipes 96, and the first electric push rod 95 is driven to pull the strip handle 92 and the brush 93 back and forth. When the rice passes through the inside of the cover 91, the reciprocating brush 93 brushes the rice, so that the bran layer and impurities removed from the rice are forced to float up, and then are sucked away by the external dust suction device, effectively ensuring the cleaning effect of the bran layer and impurities, ensuring the cleanliness of the rice, improving the processing link, and avoiding the need for additional post-processing links to clean the bran layer and impurities; at the same time, the brushing of the rice by the brush 93 can remove the bran layer and impurities on the surface of the rice again.

[0078] Optionally, the stirring and grinding part 3 includes a load-bearing column 31 installed on the vertical base 2, a tray 32 installed on the load-bearing column 31, a barrel 33 arranged on the tray 32, a second electric push rod 34 installed on the top of the vertical base 2, a wide groove 35 vertically opened on the vertical base 2, a right-angle mounting plate 36 slidably installed in the wide groove 35, and the output end of the second electric push rod 34 is connected to the right-angle mounting plate 36, a second motor 37 inversely installed at the front end of the right-angle mounting plate 36, a core shaft 38 connected to the output end of the second motor 37, and two groups of a number of polishing rods 39 mirror-mounted on the side of the core shaft 38;

[0079] Two groups of a number of the polishing rods 39 sink into the barrel 33, and the end faces of the two groups of a number of the polishing rods 39 are in contact with the inner side wall of the barrel 33. Normally, the core shaft 38 is inserted into the barrel 33. After the barrel 33 is filled with rice, the second motor 37 is driven to start driving the core shaft 38 and two groups of a number of the polishing rods 39 to rotate in the rice, so as to polish off the bran layer and impurities on the surface of the rice by the extrusion and friction of the two groups of a number of the polishing rods 39 during the movement process, realizing the polishing of the surface of the rice. During the polishing process, the second electric push rod 34 is driven irregularly to push the right-angle mounting plate 36 upward along the wide groove 35, so that the two groups of a number of the polishing rods 39 rotate and slowly move upward in the barrel 33, thereby expanding the stirring range and ensuring that all the rice in the barrel 33 can be polished by the two groups of a number of the polishing rods 39, further ensuring the thoroughness of the polishing.

[0080] Optionally, the stirring and grinding part 3 further includes a spiked head 391 installed at the bottom of the core shaft 38, and a number of triangular strips 392 installed on the core shaft 38;

[0081] A number of the triangular bars 392 are respectively located above a number of the polishing rods 39. During the process of driving two groups of a number of polishing rods 39 to move upward by the second electric push rod 34, the number of triangular bars 392 move synchronously, and the number of triangular bars 392 use the sharp upper edges to squeeze the rice apart, thereby creating a passage required for the lower polishing rods 39 to pass through, ensuring that two groups of a number of polishing rods 39 can move upward smoothly, preventing the polishing rods 39 from being bent or damaged due to excessive resistance or the rice grains from being crushed by extrusion.

[0082] Optionally, a limiting vertical plate 13 is connected to the front end of the load-bearing column 31. A positioning rod 14 is slidably inserted into the limiting vertical plate 13, and the positioning rod 14 is inserted into the vertical base 2.

[0083] The load-bearing column 31 is rotatably installed on the vertical base 2.

[0084] A handle 15 is installed at the top of the barrel body 33. After all the rice in the screw conveyor 1 is conveyed, by continuously driving the second electric push rod 34, two groups of a number of polishing rods 39 are all pulled out of the barrel body 33. Then, hold the handle 15 to straighten the barrel body 33 and pull out the positioning rod 14. Then, the rice in the barrel body 33 can be quickly poured into the screw conveyor 1 by rotating the barrel body 33 towards the screw conveyor 1. Then, reset the barrel body 33 and reinsert the positioning rod 14, thereby ensuring that the rice is quickly added to the screw conveyor 1, greatly facilitating the feeding and improving the efficiency. At the same time, when the screw conveyor 1 conveys the current batch of rice, the next batch of rice can be temporarily stored in the barrel body 33 and pre-polished, so that the whole polishing process is more meticulous, adding a pre-polishing link and effectively improving the polishing effect.

[0085] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A rice surface polishing device for rice processing, characterized in that, Comprising: A screw conveyor (1), a vertical base (2) located on the side of the feed inlet of the screw conveyor (1), a stirring and grinding part (3) arranged on the vertical base (2), a conveying channel (4) with its upper end connected to the discharge port of the screw conveyor (1), a rolling and grinding part (5) connected to the lower end of the conveying channel (4), a gas impact grinding part (6) connected to the rolling and grinding part (5), a conveyor belt (7) arranged below the gas impact grinding part (6), and the conveying surface of the conveyor belt (7) is close to the end of the gas impact grinding part (6), a surrounding frame (8) installed on the conveyor belt (7), and a negative pressure cleaning mechanism (9) installed on the conveyor belt (7) and located in front of the gas impact grinding part (6); The gas impact grinding part (6) is partially recessed into the surrounding frame (8), wherein: The driving of the stirring and grinding part (3) can rotate and stir inside the piled-up rice, so that the surface of the rice is rubbed; The rolling and grinding part (5) can cause the rice to roll and slide in multiple directions within a certain space range, so that the rice undergoes multiple rubbings within the rolling and grinding part (5); The gas impact grinding part (6) is suitable for causing the rice to actively rub in a way of multiple jumping impacts; The negative pressure cleaning mechanism (9) is suitable for sucking away the impurities in the rice sufficiently during the conveying of the rice by the conveyor belt (7).

2. The rice surface polishing device for rice processing according to claim 1, wherein The rolling and grinding part (5) includes a round dish (51) with upper and lower notches provided on its circumferential surface, and the upper and lower notches on the round dish (51) are collinear, a side cover (52) threadedly connected to the opening of the round dish (51), a first motor (53) installed on the side cover (52), a central shaft rod (54) rotatably installed at the center of the side cover (52) through a bearing, and the central shaft rod (54) extends into the round dish (51), the output shaft of the first motor (53) is connected to the central shaft rod (54), a plurality of partition plates (55) circumferentially installed on the peripheral side of the central shaft rod (54), and a plurality of polishing layers (56) respectively laid on the inner wall of the round dish (51) and the front and back surfaces of the plurality of partition plates (55); The upper notch of the round dish (51) is connected to the lower end of the conveying channel (4); The plurality of partition plates (55) can divide the interior of the round dish (51) into multiple independent spaces of equal size.

3. The rice surface polishing device for rice processing according to claim 2, wherein The plurality of polishing layers (56) are all sponge sandpapers.

4. The rice surface polishing device for rice processing according to claim 3, wherein The air impact grinding part (6) includes a lower guiding channel (61) connected to the lower notch of the round dish (51), and the tail of the lower guiding channel (61) is arc-shaped. A ceiling (62) is installed on the front side of the lower guiding channel (61), several suspension thin rods (63) are connected to the bottom surface of the ceiling (62), several grinding balls (64) are respectively installed in pairs at the bottoms of several suspension thin rods (63), and several grinding balls (64) are located at the outlet of the lower guiding channel (61). An introduction channel (65) is communicated with the middle part of the lower guiding channel (61), and a first air duct (66) with one end connected to the introduction channel (65); The other end of the first air duct (66) is connected to the air outlet of a first external blower; Several grinding balls (64) are close to the conveying surface of the conveyor belt (7); The surrounding frame (8) encloses several grinding balls (64) and the tail of the lower guiding channel (61) inside; 5. The rice surface polishing device for rice processing according to claim 4, characterized in that, Several grinding balls (64) are distributed in multiple rows from high to low; Several grinding balls (64) are cross-distributed between every two rows; 6. The rice surface polishing device for rice processing according to claim 5, characterized in that, Notches are formed on a group of opposite surfaces of the conveying channel (4). An air blowing channel (10) communicated with the conveying channel (4) through one of the notches, a second air duct (11) with one end connected to the air blowing channel (10) and the other end connected to the air outlet of a second external blower, and a dust collection box (12) installed at the other notch; The air blowing channel (10) faces the dust collection box (12); 7. The rice surface polishing device for rice processing according to claim 6, characterized in that, The negative pressure cleaning mechanism (9) includes a cover body (91) installed on the conveyor belt (7), a long slot formed on the side surface of the cover body (91), a strip handle (92) slidably installed in the long slot and inserted into the cover body (91), a brush (93) installed at the bottom of the strip handle (92), a support platform (94) installed on the side surface of the conveyor belt (7), a first electric push rod (95) arranged on the support platform (94), and the output end of the first electric push rod (95) is connected to the part of the strip handle (92) extending outside the cover body (91), and two suction pipes (96) with one end communicated with the top of the cover body (91); The other ends of the two suction pipes (96) are connected to an external dust collection device; The brush (93) is close to the conveying surface of the conveyor belt (7); 8. The rice surface polishing device for rice processing according to claim 7, characterized in that, The grinding part (3) includes a load-bearing column (31) installed on the vertical base (2), a tray (32) installed on the load-bearing column (31), a barrel body (33) arranged on the tray (32), a second electric push rod (34) installed on the top of the vertical base (2), a wide groove (35) vertically opened on the vertical base (2), a right-angle mounting plate (36) slidably installed in the wide groove (35), and the output end of the second electric push rod (34) is connected to the right-angle mounting plate (36), a second motor (37) inversely installed at the front end of the right-angle mounting plate (36), a mandrel (38) connected to the output end of the second motor (37), and two groups of a number of polishing rods (39) mirror-mounted on the side of the mandrel (38); Two groups of a number of the polishing rods (39) are inserted into the barrel body (33), and the end faces of the two groups of a number of the polishing rods (39) are in contact with the inner side wall of the barrel body (33).

9. The rice surface polishing device for rice processing according to claim 8, characterized in that The grinding part (3) further includes a spike head (391) installed at the bottom of the mandrel (38), and a number of triangular strips (392) installed on the mandrel (38); A number of the triangular strips (392) are respectively located above a number of the polishing rods (39).

10. The rice surface polishing device for rice processing according to claim 9, characterized in that A limiting vertical plate (13) is connected to the front end of the load-bearing column (31), a positioning rod (14) is slidably inserted into the limiting vertical plate (13), and the positioning rod (14) is inserted into the vertical base (2); The load-bearing column (31) is rotatably installed on the vertical base (2); A handle (15) is installed on the top of the barrel body (33).

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