Flour milling device

Abstract

The invention relates to a flour milling device, and relates to the field of flour processing, the flour milling device comprises a milling bin, a bran finishing bin, a screening bin, a winnowing bin and a fine grinding bin, the milling bin is arranged above the bran finishing bin, a discharge port of the milling bin is communicated with an inlet of the bran finishing bin, an inlet of the screening bin is communicated with an outlet of the bran finishing bin, and the fine grinding bin is arranged above the screening bin. The screening bin is provided with a first outlet used for discharging large particles and a second outlet used for discharging small particles, an inlet of the winnowing bin is communicated with the first outlet, the winnowing bin is provided with a powder outlet and a peel outlet, and the second outlet and the powder outlet are communicated with an inlet of the fine grinding bin. Before the seed coats are treated, the bran finishing assembly and the winnowing assembly are sequentially arranged to separate the seed coats from endosperm, on one hand, the endosperm attached to the seed coats can be reduced, the flour yield of raw materials is increased, on the other hand, the seed coats and the endosperm can be better separated, and the taste of flour is improved.

Description

Technical Field

[0001] The invention relates to the field of flour processing, in particular to a flour grinding device. Background Art

[0002] Flour milling equipment is mainly used to process wheat, corn and other grains into flour. When processing grains into flour, the seed coat is mixed with the flour, which will make the flour taste rough and affect the texture and taste of pasta. Therefore, in order to keep the flour delicate and smooth, the bran needs to be separated from the flour.

[0003] At present, a Chinese invention patent application with publication number CN 112495549 A and publication date March 16, 2021 proposes a flour production grinding device and a grinding method, including a shell, a motor is fixedly installed at the bottom of the inner cavity of the shell, and a rotating shaft is fixedly connected to the output end above the motor, a coarse grinding bin is fixedly connected to the upper interior of the shell, a first grinding component is arranged inside the coarse grinding bin and above the rotating shaft, a fine grinding bin is fixedly connected to the middle of the interior of the shell, and a second grinding component is arranged inside the fine grinding bin and in the middle of the rotating shaft, the first grinding component includes a rotating block, spiral leaves, a first protrusion, a sieve hole, a screen and a first scraper, the rotating block is fixedly connected above the rotating shaft, and the spiral leaves are fixedly connected above the side of the rotating block.

[0004] When in use, the motor provides power to the entire device through the rotating shaft, so that the first grinding component in the coarse grinding bin performs preliminary crushing on the flour raw material, separates the seed coat and endosperm of the raw material, and crushes the endosperm into microparticles. The micro-endosperm and a small amount of seed coat enter the fine grinding bin and are ground and separated by the second grinding component, so that the micro-endosperm is ground into powder, and the powder is flour.

[0005] With regard to the above-mentioned related technologies, after the raw materials are initially crushed by the coarse grinding bin, the seed coat and the endosperm are separated and the micro-endosperm is directly ground, and the seed coat will remain on the screen waiting for discharge. After the raw materials are initially crushed, a lot of endosperm is still attached to the seed coat. Directly discharging the seed coat on the screen will cause the endosperm attached to the seed coat to be wasted, affecting the flour yield of the device. Summary of the invention

[0006] In order to reduce the endosperm attached to the seed coat when the seed coat is discharged and improve the flour output rate of the device, the present invention provides a flour grinding device.

[0007] The present invention provides a flour grinding device, which adopts the following technical solution: A flour grinding device comprises a grinding chamber, a bran beating chamber, a screening chamber, a winnowing chamber and a fine grinding chamber; a feed inlet and a discharge port are arranged above the grinding chamber, the discharge port is arranged below the grinding chamber, a grinding assembly is arranged inside the grinding chamber, the grinding assembly comprises a fixed grinding disc fixedly arranged on the grinding chamber, a movable grinding disc arranged below the fixed grinding disc and a main shaft, a grinding port is arranged on the fixed grinding disc, and the grinding port is communicated with the feed inlet, the main shaft is arranged below the movable grinding disc for supporting the movable grinding disc, and the main shaft is connected to the movable grinding disc in transmission; the bran beating chamber is provided with a feed inlet and a discharge port is arranged above the grinding chamber, the discharge port is arranged below the grinding chamber, a grinding assembly is arranged inside the grinding chamber, the grinding assembly comprises a fixed grinding disc fixedly arranged on the grinding chamber, a movable grinding disc arranged below the fixed grinding disc and a main shaft, the fixed grinding disc is provided with a grinding port, and the grinding port is communicated with the feed inlet, the main shaft is arranged below the movable grinding disc for supporting the movable grinding disc, and the main shaft is connected to the movable grinding disc in transmission; the bran beating chamber is provided with a feed inlet and a discharge port is arranged above the grinding chamber, the discharge port is arranged below the grinding chamber, the grinding assembly is arranged inside the grinding chamber, the grinding assembly comprises a fixed grinding disc fixedly arranged on the grinding chamber, a movable grinding disc arranged below the fixed grinding disc and a main shaft, the grinding port is communicated with the feed inlet, the main shaft is arranged below the movable grinding disc for supporting the movable grinding disc, and the main shaft is connected to the movable grinding disc in transmission; the bran beating chamber is provided with a feed inlet and a discharge port is arranged above the grinding chamber, the discharge port is arranged above the grinding chamber, the discharge port is arranged above the grinding chamber, the grinding assembly is arranged inside the grinding chamber, the grinding assembly comprises a fixed grinding disc fixedly arranged on the grinding chamber, a movable grinding disc arranged below the fixed grinding disc and a main shaft, the grinding assembly comprises a fixed grinding disc fixedly arranged on the grinding chamber, a movable grinding disc arranged below the fixed grinding disc It is arranged below the grinding bin and connected with the discharge port, the main shaft passes through the bran beating bin and is connected to the driving member, a bran beating assembly is arranged inside the bran beating bin, the bran beating assembly is rotatably arranged on the main shaft, and the bran beating assembly is transmission-connected to the main shaft; the screening bin is provided with a first outlet and a second outlet, the inlet of the screening bin is connected with the outlet arranged at the bottom of the bran beating bin through a feeding device; the air separation bin is provided with a powder outlet and a husk outlet, the inlet of the air separation bin is connected with the first outlet; the inlet of the fine grinding bin is respectively connected with the second outlet and the powder outlet.

[0008] By adopting this technical solution, the grains enter the grinding bin through the feed port of the grinding bin and then enter the area between the fixed grinding disc and the movable grinding disc through the grinding port. The main shaft drives the fixed grinding disc to rotate, and the fixed grinding disc and the movable grinding disc cooperate to grind and crush the grains and squeeze the grains toward the outer edge. In this process, the fixed grinding disc and the movable grinding disc will squeeze and crush the grains into particles by extrusion, and will not grind the grains into powder. Subsequently, the crushed particles are squeezed out from the area between the fixed grinding disc and the movable grinding disc, and enter the bran beating bin through the discharge port of the grinding bin. The bran beating assembly in the bran beating bin rotates at high speed driven by the main shaft, and the grains fall downward from the top of the bran beating bin. During the process of falling downward, the grains will pass through the area where the bran beating assembly rotates, and the high-speed rotating bran beating assembly will crush the fallen grains. The grains are crushed into granules. Most of the grains are composed of endosperm, seed coat and germ. The endosperm of grain grains is mainly composed of starch, the germ is mainly composed of starch and protein, and the seed coat is mainly composed of wood fiber. The broken grain grains will be impacted by the bran beating component to break the endosperm mainly composed of starch and the germ mainly composed of starch and protein into powder or smaller particles. The seed coat mainly composed of wood fiber will be separated from the endosperm and germ and form a flaky structure. Then the small particles and powder will be directly sent to the fine grinding bin for fine grinding after screening in the screening bin. The large grains and flaky seed coat will be sent to the air separation bin for the next step of processing, and the separated small particles and powder will be sent to the fine grinding bin for processing.

[0009] In this way, after the grains pass through the grinding component and the bran beating component, most of the endosperm will be separated from the seed coat. The separated endosperm and small particles will directly enter the fine grinding bin for fine grinding, while the large particles and seed coat will be further processed and sorted. The small-particle endosperm and endosperm powder will be processed separately to improve the processing efficiency. At the same time, the bran beating component uses an impact method to separate the seed coat from the endosperm, which can maintain the integrity of the seed coat to a greater extent. On the one hand, the seed coat and endosperm can be better separated in the subsequent process, so that the endosperm attached to the seed coat is minimized, thereby improving the flour yield of the device. On the other hand, the seed coat can be better separated from the starch, thereby more finely controlling the content of seed coat powder in the flour and improving the taste of the flour.

[0010] Optionally, the bran beating assembly includes a plurality of rotating drums rotatably arranged on a main shaft, a plurality of bran beating rollers mounted on the rotating drums, and planetary gears for transmission between the plurality of rotating drums, the plurality of bran beating rollers are evenly mounted on the rotating drum along the circumference of the rotating drum, the plurality of rotating drums are stacked on the main shaft along the axial direction of the main shaft, the planetary gears are installed between adjacent rotating drums, and the rotating drums are transmission-connected to the main shaft.

[0011] By adopting this technical solution, when the main shaft rotates, it drives one of the drums to move, and the drums are mutually transmitted through planetary gears. When the drum rotates, it drives the bran beating roller on the drum to rotate, thereby striking and beating the grain particles around the bran beating assembly. In this way, by controlling the number of teeth and pitch of the planetary gears, the rotation speed or direction of rotation between adjacent drums can be adjusted to be different, thereby making the impact force of the bran beating roller different. By speeding up the rotation speed of the drum or making the rotation direction opposite, the impact force of the bran beating roller on the grain particles can be increased, thereby improving the separation efficiency.

[0012] Optionally, the rotating drum includes a sleeve portion, an inner tooth portion and an outer tooth portion, the sleeve portion is arranged in a ring shape, the inner tooth portion is arranged on one end face of the sleeve portion, and the outer tooth portion is arranged on the other end face of the sleeve portion, the inner tooth portion, the outer tooth portion and the sleeve portion are all coaxially arranged, the outer annular surface diameter of the inner tooth portion is smaller than the inner annular surface diameter of the outer tooth portion, and the outer circumferential surface of the inner tooth portion and the inner circumferential surface of the outer tooth portion are cooperated with gear teeth, the outer tooth portion is sleeved on the inner tooth portion of the adjacent rotating drum, and the planetary gear is arranged between the outer tooth portion and the inner tooth portion of the adjacent rotating drum.

[0013] By adopting this technical solution, the sleeve shaft portion of the rotating drum is sleeved on the main shaft, and when multiple rotating drums are stacked together, the inner tooth portion of the rotating drum at the bottom will be inserted into the outer tooth portion of the rotating drum at the top, or the rotating drums can be arranged in the opposite direction, and the inner tooth portion of the rotating drum at the top will be inserted into the outer tooth portion of the rotating drum at the bottom. When the inner tooth portion is inserted into the adjacent outer tooth portion, the gear teeth of the inner tooth portion and the outer tooth portion do not contact each other, and the planetary gear is arranged between the inner tooth portion and the outer tooth portion, and the gear teeth of the planetary gear respectively mesh with the gear teeth of the outer tooth portion and the gear teeth of the inner tooth portion. When one of the rotating drums rotates, the adjacent rotating drums will rotate together under the transmission of the planetary gear.

[0014] Optionally, a gearbox is provided at the bottom of the bran beating assembly, an input end of the gearbox is drivingly connected to the main shaft, and an output end of the gearbox is drivingly connected to the rotating drum located at the bottom of the bran beating assembly.

[0015] By adopting this technical solution, the gearbox connects the main shaft and the rotating drum of the bran beating assembly. When adjusting the gearbox, the transmission ratio between the main shaft and the bran beating assembly can be controlled, and the rotation speed of the bran beating assembly can be adjusted to thereby control the impact speed of the bran beating assembly on the grain particles. In this way, the rotation speed of the bran beating assembly can be flexibly adjusted according to the dryness and humidity of different grains or the size of the grain particles, thereby adjusting the degree of completion of the grain seed coat and the degree of seed coat separation, thereby increasing the applicability of the device.

[0016] Optionally, a pneumatic separation component, a skin outlet component and a vibration component are arranged inside the pneumatic separation bin, the pneumatic separation component includes a filter and a negative pressure fan, a powder outlet is arranged above the pneumatic separation bin, the negative pressure fan is arranged above the pneumatic separation bin and is connected with the powder outlet, the filter cover is arranged on the powder outlet, and the powder outlet is connected with the entrance of the fine grinding bin; the skin outlet component includes a conveying net and a partition, a skin outlet is arranged below the pneumatic separation bin, the partition isolates the skin outlet from the inside of the pneumatic separation bin, the conveying net is arranged below the powder outlet and one end passes through the partition and is located above the skin outlet, and ventilation holes are arranged on the conveying net; the vibration component is located below the conveying net, and the vibration component is located on the side of the partition close to the powder outlet.

[0017] By adopting this technical solution, the vibration component will vibrate and screen the grains inside the winnowing bin, and vibrate and screen the light powder or seed coat to the upper layer. The negative pressure fan can start to attract the light endosperm powder and seed coat upwards, and the powder will enter the powder outlet through the vents and filters of the conveyor net, while the seed coat will adhere to the conveyor net. During the circulation process, the conveyor net will transport the seed coat attached to the conveyor net to the top of the husk outlet. Since the husk outlet and the powder outlet are separated by a partition, the attraction of the negative pressure fan above the husk outlet is reduced, and the seed coat attached to the conveyor net will detach from the conveyor net above the husk outlet and be discharged from the husk outlet. In this way, the seed coat can be further separated from the powdered endosperm, and the separated seed coat is discharged from the husk outlet, and the separated endosperm powder enters the fine grinding bin for further processing.

[0018] Optionally, the skin discharging component also includes a flexible scraper and a sealing baffle, the sealing baffle is fixedly arranged inside the air separation bin, the sealing baffle is arranged between the conveying net and the partition, the flexible scraper is fixedly arranged inside the air separation bin, the flexible scraper is arranged below the conveying net, and a gap is left between the flexible scraper and the conveying net.

[0019] By adopting this technical solution, the setting of the sealing plate can further block the gap between the transmission belt and the partition, so that the suction force transmitted to the top of the hull outlet by the negative pressure fan is further reduced, helping the seed coat attached to the conveyor net to separate from the conveyor net and fall into the hull outlet for discharge, thereby improving the discharge efficiency of the seed coat; the setting of the flexible scraper can hang the larger particles attached to the conveyor net from the conveyor net, reducing the probability of incompletely crushed grain particles being discharged from the hull outlet, facilitating subsequent further processing, and improving the flour yield of the device.

[0020] Optionally, a first brush and a second brush are fixedly arranged inside the air separation bin, the first brush is arranged below the conveying net and is in contact with the conveying net, the second brush is arranged inside the conveying net and is in contact with the lower half of the conveying net.

[0021] By adopting this technical solution, when the transmission network circulates, the first brush can scrape the downward side of the transmission network to drop the endosperm powder attached to the transmission network, and scrape the endosperm powder attached to the seed coat, thereby reducing the endosperm powder discharged from the husk outlet and improving the powder extraction rate of the device; the second brush can scrape the lower part of the transmission network from the inside, and when the ventilation holes of the transmission network are blocked, the second brush can clear the blocked ventilation holes of the transmission network from the inside, thereby reducing the probability of insufficient suction due to the blockage of the ventilation holes, thereby causing the seed coat to fail to attach to the transmission network.

[0022] Optionally, the vibration assembly includes a first vibrating screen, a second vibrating screen, a flat grinding roller and a conveying assembly, the first vibrating screen is tilted below the conveying net, the first end of the first vibrating screen is lower than the second end of the first vibrating screen, the flat grinding roller is arranged below the first end of the first vibrating screen, the second vibrating screen is tilted below the flat grinding roller, the end of the second vibrating screen away from the flat grinding roller is lower than the end of the second vibrating screen close to the flat grinding roller, the inlet of the conveying assembly is connected to the end of the second vibrating screen away from the flat grinding roller, and the outlet of the conveying assembly is connected to the second end of the first vibrating screen.

[0023] By adopting this technical solution, grain particles fall on the first vibrating screen when entering the winnowing bin, and the light endosperm powder and seed coat are screened to the top and sucked upward by the negative pressure fan. The larger grain particles will move toward the flat grinding roller when the first vibrating screen vibrates and fall into the flat grinding roller. The larger grain particles fall on the second vibrating screen after being ground by the flat grinding roller, and move toward the direction of the conveying component under the vibration of the second vibrating screen, and finally fall on the first vibrating screen again through the conveying component for screening, and the above actions are repeated until most of the endosperm powder and seed coat are discharged from the winnowing bin under the action of the negative pressure fan. In this way, the screening component can crush and screen larger grain particles again, further promote the separation of seed coat and endosperm powder, minimize the amount of endosperm powder attached to the seed coat, and further improve the flour extraction rate.

[0024] Optionally, the vibration assembly also includes a flexible connector and a seal, and the first vibrating screen and the second vibrating screen are both installed inside the air separation bin via a flexible connector; a seal is also provided between the first vibrating screen and the inner wall of the air separation bin, and between the second vibrating screen and the inner wall of the air separation bin; a drainage member is also provided between the first vibrating screen and the flat grinding roller.

[0025] By adopting this technical solution, the flexible connector can reduce the probability of vibration being transmitted to the air separation bin when the first vibrating screen and the second vibrating screen are working, thereby improving the service life of the device; the sealing member setting can reduce the probability of broken grain particles passing through the gap between the first vibrating screen and the second vibrating screen and the air separation bin, so that all grain particles can pass through the first vibrating screen and the second vibrating screen, thereby improving the screening efficiency, and at the same time reducing the probability of grain particles accumulating under the second vibrating screen; the setting of the drainage member can enable the grain particles to enter the flat grinding roller along the drainage member when falling from the first vibrating screen, thereby ensuring that the grains falling from the first vibrating screen can be ground by the flat grinding roller, thereby further improving the separation efficiency of the seed coat and the endosperm.

[0026] Optionally, a hydraulic push rod is also installed inside the grinding chamber, a support platform is fixedly provided on the inner wall of the grinding chamber, a limiting groove is provided at the bottom of the fixed grinding disc, one end of the hydraulic push rod is fixedly provided in the limiting groove, and the other end of the hydraulic push rod is supported on the support platform.

[0027] By adopting this technical solution, when the hydraulic push rod rises, it will push the fixed grinding disc upwards, at which time the distance between the fixed grinding disc and the moving grinding disc will increase, and the grinding assembly will grind the grains into larger particles. When the hydraulic push rod falls downward, the fixed grinding disc will move downward, at which time the distance between the fixed grinding disc and the moving grinding disc will decrease, and the grinding assembly will grind the grains into smaller particles. In this way, by controlling the hydraulic push rod, the distance between the fixed grinding disc and the moving grinding disc can be adjusted, thereby controlling the particle size of the grain crushing; at the same time, the setting of the limit groove can also ensure that the position of the fixed grinding disc is fixed, thereby improving the stability of the fixed grinding disc.

[0028] In summary, the present invention includes at least one of the following beneficial technical effects: Before processing the seed coat, the seed coat and endosperm are separated by setting up a bran beating component and a winnowing component in turn. On the one hand, it can reduce the endosperm attached to the seed coat and improve the flour yield of the raw material. On the other hand, it can better separate the seed coat from the endosperm and improve the taste of the flour.

[0029] The bran beating component is configured as a plurality of parts assembled together, and when a local position of the bran beating component is damaged, the local position can be repaired or replaced, thereby reducing maintenance costs.

[0030] By installing a gearbox and a planetary gear in the bran beating assembly, the rotation speed of the bran beating assembly can be flexibly adjusted while the output speed of the main shaft remains unchanged, thereby adjusting the impact force of the bran beating assembly on the grain particles and controlling the integrity of the seed coat and the separation degree of the seed coat and the endosperm.

[0031] Through the cooperation of the air separation component and the hull removal component, the endosperm powder and the seed coat can be separated from different outlets, and by setting a brush, the endosperm powder attached to the seed coat can be further reduced to improve the powder extraction rate.

[0032] A vibration component is arranged below the air separation component and the hull removal component. The flat grinding roller in the vibration component can cyclically crush the grain particles, and the vibrating screen can help to quickly separate the seed coat from the endosperm, thereby further improving the flour extraction rate while ensuring the integrity of the seed coat. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 is a top view of the overall structure of an embodiment of the present invention; Figure 3 yes Figure 2Schematic cross-sectional view of AA in the figure; Figure 4 yes Figure 3 A partial enlarged schematic diagram of part I; Figure 5 1. It is an exploded view of the installation structure of the bran beating assembly according to an embodiment of the present invention; Figure 6 It is a schematic structural diagram of a bran beating assembly according to an embodiment of the present invention; Figure 7 This is a schematic plan view of the internal structure of the winnowing bin according to an embodiment of the present invention; Figure 8 It is a three-dimensional schematic diagram of the internal structure of the air separation bin according to an embodiment of the present invention.

[0034] Explanation of the reference numerals: 1. Grinding bin; 11. Grinding assembly; 111. Fixed grinding disc; 1111. Grinding opening; 1112. Limiting groove; 112. Moving grinding disc; 12. Hydraulic push rod; 13. Main shaft; 14. Support platform; 15. Feed inlet; 16. Discharge outlet; 2. Bran beating bin; 21. Bran beating assembly; 211. Rotating drum; 2111. Sleeve shaft; 2112. Inner gear portion; 2113. Outer gear portion; 212. Planetary gear; 213. Bran beating roller; 22. Gearbox; 3. Screening bin; 31. First outlet; 32. Second outlet ; 4. Air separation chamber; 41. Air separation component; 411. Filter; 412. Negative pressure fan; 427. Second brush; 414. Powder outlet; 42. Skin outlet component; 421. Conveying net; 422. Partition; 423. First brush; 424. Flexible scraper; 425. Sealing baffle; 426. Skin outlet; 43. Vibrating component; 431. First vibrating screen; 432. Second vibrating screen; 433. Flat grinding roller; 434. Conveying component; 435. Flexible connector; 436. Sealing component; 437. Drainage component; 5. Fine grinding chamber. DETAILED DESCRIPTION

[0035] The following combination Figures 1 to 8 The present invention is described in further detail.

[0036] The embodiment of the present invention discloses a flour grinding device. Figures 1 to 3 A flour grinding device mainly comprises a grinding bin 1, a bran beating bin 2, a screening bin 3, an air separation bin 4 and a fine grinding bin 5, wherein the grinding bin 1 is arranged above the bran beating bin 2, and the discharge port 16 of the grinding bin 1 and the entrance of the bran beating bin 2 are connected to each other, the entrance of the screening bin 3 and the outlet of the bran beating bin 2 are connected, the screening bin 3 is provided with a first outlet 31 for discharging large particles and a second outlet 32 ​​for discharging small particles, the entrance of the air separation bin 4 is connected with the first outlet 31, the air separation bin 4 is provided with a powder outlet 414 and a bran outlet 426, wherein the second outlet 32 ​​and the powder outlet 414 are connected with the entrance of the fine grinding bin 5.

[0037] When in use, the grains are introduced into the feed port 15 of the grinding bin 1 from the feed port 15 of the grinding bin 1, and after being crushed by the grinding bin 1, the grains enter the bran beating bin 2 through the discharge port 16. Then, the grain particles are beaten by the bran beating bin 2 and enter the screening bin 3. The screening bin 3 screens out the large grain particles and sends them into the air separation bin 4 through the first discharge port 16, and screens out the small grain particles and sends them into the fine grinding bin 5 through the second discharge port 16. After the large grain particles enter the air separation bin 4, they are screened twice inside the air separation bin 4 to discharge the seed coat from the seed coat outlet 426, and the endosperm powder or small particles are sent into the fine grinding bin 5 from the powder outlet 414. The fine grinding bin 5 further grinds the endosperm particles and powder inside into flour that meets the requirements. In this process, the grains are ground, beaten and screened twice before being sent to the fine grinding bin 5 for processing. On the one hand, the seed coat and the endosperm can be separated more cleanly, thereby improving the taste of the flour; on the other hand, the endosperm can be attached to the seed coat as little as possible, so that most of the endosperm can be sent to the fine grinding bin 5 to become flour, thereby improving the flour extraction rate of the grains.

[0038] Reference Figure 3 and Figure 4 The body of the grinding bin 1 is arranged in two sections, wherein the lower half of the grinding bin 1 is fixedly arranged above the bran threshing bin 2 through a support rod, the upper half of the grinding bin 1 is provided with a top cover, the top cover of the grinding bin 1 is installed on the lower half of the grinding bin 1 by welding or bolting, a feed inlet 15 is arranged at the center of the top cover of the grinding bin 1, a discharge port 16 is arranged at the bottom of the grinding bin 1, a support platform 14 is fixedly arranged on the inner wall of the grinding bin 1, a hydraulic push rod 12 and a grinding assembly 11 are arranged on the support platform 14, wherein the grinding assembly 11 comprises a fixed grinding disc 111 and a movable grinding disc 112, a limiting groove 1112 is arranged at the edge of the fixed grinding disc 111, one end of the hydraulic push rod 12 is fixedly arranged in the limiting groove 1112, and the other end is fixedly arranged on the support platform 14, a grinding opening 1111 is also arranged at the center of the fixed grinding disc 111, and the grinding opening 111 1 corresponds to the feeding port 15 of the grinding bin 1, and a main shaft 13 is further arranged inside the grinding bin 1, one end of the main shaft 13 is rotatably arranged inside the bran threshing bin 2, and the other end passes through the discharging port 16 of the grinding bin 1 and is arranged below the fixed grinding disc 111, and the movable grinding disc 112 is fixedly arranged at the end of the main shaft 13 close to the fixed grinding disc 111, and a gap is left between the fixed grinding disc 111 and the movable grinding disc 112, and a gap is left between the movable grinding disc 112 and the inner wall of the grinding bin 1 so that the crushed grain particles can fall from the edge of the movable grinding disc 112, and grinding teeth are arranged on the opposite end surfaces of the fixed grinding disc 111 and the movable grinding disc 112, so that the grains between the fixed grinding disc 111 and the movable grinding disc 112 can be pushed outward when the fixed grinding disc 111 and the movable grinding disc 112 rotate relative to each other, and the grinding teeth directions on the fixed grinding disc 111 and the movable grinding disc 112 form a certain angle with the fixed grinding disc 111.

[0039] When in use, the grains are poured into the grinding bin 1 from the feed port 15 of the grinding bin 1, and the grains pass through the feed port 15 and the grinding port 1111 into the gap between the fixed grinding disc 111 and the movable grinding disc 112, and the grains are ground into particles by the grinding teeth between the passive grinding disc 112 and the fixed grinding disc 111, and move toward the outer edge of the movable grinding disc 112 under the push of the inclined grinding teeth, and finally fall from the movable grinding disc 112 and are discharged from the grinding bin 1 through the discharge port 16; the hydraulic push rod 12 can be adjusted to control the distance between the fixed grinding disc 111 and the movable grinding disc 112, and thereby adjust the size of the crushed grain particles.

[0040] Reference Figures 3 to 5 The bran beating bin 2 is arranged below the grinding bin 1, and the entrance of the bran beating bin 2 is connected with the discharge port 16 of the grinding bin 1. A main shaft 13 and multiple bran beating components 21 are arranged inside the bran beating bin 2. A driving motor is also arranged at the bottom of the bran beating bin 2. The main shaft 13 is connected to the inside of the grinding bin 1 at the top, and is connected to the output shaft of the driving motor at the bottom. In order to prevent the driving motor from contaminating the grains inside the bran beating bin 2, a baffle is arranged above the driving motor to isolate the driving motor from the inside of the bran beating bin 2.

[0041] Reference Figure 5 and Figure 6The bran beating assembly 21 includes a rotating drum 211, a planetary gear 212 and a bran beating roller 213, wherein the rotating drums 211 of the multiple bran beating assemblies 21 are coaxially arranged with the main shaft 13 and sleeved on the main shaft 13, the bran beating roller 213 is a stick and is fixedly connected to the outer circumferential surface of the rotating drum 211 by threads, and the bran beating roller 213 is arranged along the radial direction of the rotating drum 211, the rotating drum 211 includes a sleeve shaft portion 2111, an inner tooth portion 2112 and an outer tooth portion 2113, the sleeve shaft portion 2111 is arranged in an annular shape, and the inner circumferential surface of the sleeve shaft portion 2111 is fitted with the outer circumferential surface of the main shaft 13, the inner tooth portion 2112 is an annular boss arranged on a plane end surface of the sleeve shaft portion 2111, the inner tooth portion 2112 is coaxially arranged with the sleeve shaft portion 2111, and the inner circumferential surface of the inner tooth portion 2112 and the inner circumferential surface of the sleeve shaft portion 2111 are within an annular surface The outer circumference of the inner tooth portion 2112 is provided with gear teeth, and the outer tooth portion 2113 is an annular boss provided on the other plane end face of the sleeve shaft portion 2111. The outer tooth portion 2113 is coaxially arranged with the sleeve shaft portion 2111, and the outer circumference of the outer tooth portion 2113 and the outer circumference of the sleeve shaft portion 2111 are in the same annular surface, and the inner circumference of the outer tooth portion 2113 is matched with the gear teeth of the inner tooth portion 2112 to provide another set of gear teeth. When installing, the inner tooth portion 2112 of the rotating drum 211 is facing upward, and the outer tooth portion 2113 of the upper rotating drum 211 is covered on the outer tooth portion 2113 of the lower rotating drum 211, and the planetary gear 212 is installed between the inner tooth portion 2112 and the outer tooth portion 2113 of the adjacent rotating drum 211. Multiple rotating drums 211 are stacked and sleeved on the main shaft 13, and a bran beating roller 213 is installed on the outer circumference of the rotating drum 211. In order to reduce the friction between the drum 211 and the main shaft 13, a rotating bearing is provided between the drum 211 and the main shaft 13. In addition, lubricating oil can also be provided between the main shaft 13 and the drum 211 to reduce the friction.

[0042] Reference Figure 5 A gearbox 22 is also provided at the bottom of the bran beating component 21 located inside the bran beating bin 2, and the input end of the gearbox 22 is fixedly connected to the main shaft 13, and the output end of the gearbox 22 is connected to the outer tooth portion 2113 of the rotating drum 211 through a gear. The speed of the bran beating component 21 can be adjusted without changing the speed of the main shaft 13 by adjusting the gear ratio of the gearbox 22; in order to help the bran beating component 21 to be better limited, a conical platform is also provided on the main shaft 13 through a threaded connection, and the upper half of the conical platform is conically arranged, so that the grain particles falling from above can be better dispersed into the bran beating bin 2, thereby promoting the impact effect of the bran beating component 21, and the lower half of the conical platform is annularly arranged. When the inner tooth portion 2112 of the rotating drum 211 is inserted into the bottom of the conical platform, the conical platform can limit the rotation of the bran beating component 21 below to increase stability.

[0043] When in use, the driving motor drives the main shaft 13 to rotate, and the main shaft 13 drives the bran beating assembly 21 connected to the gearbox 22 to rotate through the gearbox 22, and the bran beating assembly 21 drives the upper bran beating assembly 21 to rotate through the planetary gear 212. Since the bran beating assemblies 21 are driven by the planetary gears 212, the rotation directions of adjacent bran beating assemblies 21 are opposite, which can increase the impact force of the bran beating assembly 21 on the grains; at the same time, the gearbox 22 can be adjusted to change the rotation speed of the bran beating assembly 21 without changing the rotation speed of the main shaft 13, thereby adjusting the impact force of the bran beating assembly 21 on the grains; setting the bran beating assembly 21 as a separate component can also enable the single bran beating assembly 21 to be maintained and replaced when the bran beating assembly 21 is damaged, thereby reducing the maintenance cost.

[0044] Reference Figure 3 The outlet of the bran beating component 21 is connected to the inlet of the screening bin 3 through the automatic feeding pipe. The screening bin 3 is provided with a screen. The grain particles discharged from the bran beating bin 2 can be divided into large particles and small particles under the screening of the screening bin 3. The seed coat of the grain is mostly wood fiber, which will not be broken into small particles after being beaten by the bran beating component 21, while the endosperm of the grain is mostly starch and protein, which will be hit into powder and small particles after being beaten by the bran beating component 21, wherein the large particles are seed coat, seed coat with more endosperm attached and agglomerated endosperm, and the small particles are endosperm powder and small-particle endosperm broken by impact. The large particles enter the air selection bin 4 through the first outlet 31 of the screening bin 3, and the small particles enter the fine grinding bin 5 through the first outlet 31 of the screening bin 3. The screening process can preliminarily separate the seed coat from the endosperm, reduce the subsequent grinding time of the endosperm, and facilitate the subsequent more fine separation of the seed coat from the endosperm.

[0045] Reference Figure 7 and Figure 8 The entrance of the air separation bin 4 is connected to the first outlet 31 of the screening bin 3 through an automatic feeding pipe. The air separation bin 4 is also provided with a powder outlet 414 and a husk outlet 426. A air separation component 41 is provided inside the air separation bin 4 corresponding to the powder outlet 414, and a husk outlet 42 is provided corresponding to the husk outlet 426. A vibration component 43 for further separating the seed coat from the endosperm is also provided below the air separation component 41.

[0046] Reference Figure 7 and Figure 8The vibration assembly 43 includes a first vibrating screen 431, a second vibrating screen 432, a flat grinding roller 433 and a conveying assembly 434, which is located below the powder outlet 414. A support rod is fixedly arranged on the inner wall of the air separation bin 4, and a flexible connector 435 is installed on the support rod. The flexible connector 435 is a spring shock absorber. The first vibrating screen 431 and the second vibrating screen 432 are respectively installed on different spring shock absorbers. The end of the first vibrating screen 431 away from the skin outlet 426 is higher than the other end. The second vibrating screen 432 is arranged below the first vibrating screen 431, and the end of the second vibrating screen 432 away from the skin outlet 426 is lower than the other end. The flat grinding roller 433 is arranged between the first vibrating screen 431 and the second vibrating screen 432, and the flat grinding roller 433 is arranged below the end of the first vibrating screen 431 close to the skin outlet 426. The conveying assembly 434 adopts an automatic loading barrel. The inlet of the conveying assembly 434 is arranged above the end of the second vibrating screen 432 away from the skin outlet 426, and the outlet of the conveying assembly 434 The conveying assembly 434 is arranged at one end of the first vibrating screen 431 away from the skin outlet 426, and the conveying assembly 434 conveys the materials on the second vibrating screen 432 to the top of the first vibrating screen 431 by suction. The first vibrating screen 431 and the second vibrating screen 432 are both provided with a vibration motor installed on the bottom surface, and a flat plate structure with a convex structure is arranged on the top surface. In order to enable all the materials falling from the first vibrating screen 431 to be ground by the flat grinding roller 433, a drainage member 437 is further arranged at the end of the first vibrating screen 431 close to the screen grinding roller. The drainage member 437 is a baffle structure arranged on the first vibrating screen 431, and the baffle structure gradually increases from the end close to the flat grinding roller 433 to a section of the opening away from the flat grinding roller 433; in order to reduce the probability of materials leaking from the gap between the first vibrating screen 431 and the second vibrating screen 432 and the inner wall of the air separation bin 4, a sealing member 436 is arranged between the first vibrating screen 431 and the inner wall of the air separation bin 4, and between the second vibrating screen 432 and the inner wall of the air separation bin 4, and the sealing member 436 is a flexible rubber film.

[0047] Reference Figure 7 and Figure 8The air separation component 41 includes a negative pressure fan 412 arranged at the powder outlet 414 and a filter screen 411 covered on the powder outlet 414, the powder outlet 414 is arranged above the air separation bin 4, and the skin outlet 426 is arranged at one end below the air separation bin 4, and the skin outlet component 42 includes a conveying net 421 arranged below the filter screen 411, a partition 422 fixedly arranged on the inner wall of the air separation bin 4, a sealing baffle 425 arranged between the conveying nets 421, a first brush 423 and a flexible scraper 424 arranged below the conveying net 421, and a second brush 427 arranged on the inner side of the conveying net 421, two transmission rollers are arranged horizontally below the filter screen 411, the conveying net 421 is sleeved on the transmission rollers and circulates, the partition 422 is vertically arranged on one side of the air separation bin 4 near the skin outlet 426, and the partition 422 is divided into an upper and lower part, which are respectively arranged on the conveying net 421 and the lower part. The space in the vertical direction of the skin outlet 426 is isolated from the space below the air outlet. In order to reduce the air circulation between the space in the vertical direction of the skin outlet 426 and the space below the air outlet, a sealing baffle 425 is also arranged in the area between the conveying nets 421. The partition 422 and the sealing baffle 425 are both in flexible contact with the conveying net 421. A flexible scraper 424 and a first brush 423 are also arranged below the conveying net 421. A gap with the same thickness as the seed coat is left between the flexible scraper 424 and the conveying net 421. The first brush 423 is arranged between the partition 422 and the flexible scraper 424, and the bristles of the first brush 423 are in contact with the conveying net 421. The second brush 427 is arranged in the area between the conveying nets 421, and the bristles of the second brush 427 face downward and in contact with the conveying net 421.

[0048] During use, grain particles enter the winnowing bin 4 from the entrance of the winnowing bin 4 and fall into the first vibrating screen 431. Under the screening of the first vibrating screen 431, the light grains and seed coats are screened to the upper layer, and the light endosperm powder and seed coats are screened to the upper layer and sucked upward by the negative pressure fan 412. The endosperm powder passes through the conveying net 421 and the filter screen 411 and is discharged from the powder outlet 414, and the seed coat will be attached to the conveying net 421 and transported to the upper part of the seed coat outlet 426. Since the upper part of the seed coat outlet 426 is isolated from the powder outlet 414 and has no suction, the seed coat The grains will fall above the husk outlet 426 and be discharged from the husk outlet 426; when the first vibrating screen 431 vibrates, the larger grain particles will move toward the flat grinding roller 433 and fall into the flat grinding roller 433 for grinding, and then fall onto the second vibrating screen 432, and move toward the conveying assembly 434 under the vibration of the second vibrating screen 432, and finally pass through the conveying assembly 434 and fall into the first vibrating screen 431 again for screening, and the above actions are repeated until most of the endosperm powder and seed coat are discharged from the air selection bin 4 under the action of the negative pressure fan 412. During the cyclic conveying process of the conveying net 421, the flexible scraper 424 can scrape off the large particles adsorbed on the conveying net 421 to reduce the exclusion of grain particles that are not completely broken, and the first brush 423 will scrape the seed coat to reduce the endosperm powder attached to the seed coat; the second brush 427 will scrape the conveying net 421 from the inside to reduce the probability of clogging of the conveying net 421.

[0049] Reference Figure 7 and Figure 8 The powder outlet 414 of the air separation bin 4 and the second outlet 32 ​​of the screening bin 3 are connected to the entrance of the fine grinding bin 5 through the automatic feeding pipe. The endosperm dust and small particles delivered from the powder outlet 414 and the second outlet 32 ​​are processed and ground into finer flour by grinding rollers inside the fine grinding bin 5, and discharged from the fine grinding bin 5.

[0050] The implementation principle of a flour grinding device in an embodiment of the present invention is as follows: the grain raw materials enter from the grinding port 1111 of the grinding bin 1, the grain raw materials are ground and crushed by the grinding component 11 to form grain particles, and then the grain particles enter the bran beating bin 2 for impact and beating, so as to initially separate the seed coat from the endosperm. In this process, since the bran beating component 21 uses a smooth roller for impact, the integrity of the seed coat can be guaranteed as much as possible; the seed coat and endosperm particles after initial separation are initially separated by the screening bin 3, the small particles enter the fine grinding bin 5 for fine grinding, and the large particles will enter the air separation bin 4 for secondary processing; the flat grinding roller 433 in the air separation bin 4 can perform secondary grinding on the large particles, and the large particles will enter the air separation bin 4 for secondary processing. While ensuring the integrity of the seed coat, the seed coat and the grains are further separated. The milled grains are screened by the first vibrating screen 431 and the second vibrating screen 432 to separate the light seed coat and particles to the upper layer. The negative pressure fan 412 is started to screen the light endosperm powder through the filter screen 411 and then transport it to the fine grinding bin 5 from the powder outlet 414. The seed coat will be adsorbed on the conveying net 421 and discharged through the coat outlet 426. The large particles will be circulated through the flat grinding roller 433 for grinding until most of the seed coat and endosperm are discharged from the air separation bin 4; the grain powder and particles entering the fine grinding bin 5 from the powder outlet 414 and the second outlet 32 ​​will be processed into finer flour by the grinding rollers in the fine grinding bin 5.

[0051] In summary, the present application separates the seed coat and the endosperm by setting up a bran beating component 21 and a wind selection component 41. On the one hand, it can reduce the endosperm attached to the seed coat and improve the flour yield of the raw material. On the other hand, it can better separate the seed coat from the endosperm and improve the taste of the flour; through the cooperation of the wind selection component 41 and the hull outlet component 42, the endosperm powder and the seed coat can be separated from different outlets, and by setting up a brush, the endosperm powder attached to the seed coat can be further reduced to improve the flour yield; a vibration component 43 is arranged under the wind selection component 41 and the hull outlet component 42, and the flat grinding roller 433 in the vibration component 43 can cyclically crush the grain particles, and the vibrating screen can help to quickly separate the seed coat and the endosperm, while ensuring the integrity of the seed coat and further improving the flour yield.

[0052] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A flour grinding device, characterized in that: It comprises a grinding chamber (1), a bran beating chamber (2), a screening chamber (3), a winnowing chamber (4) and a fine grinding chamber (5); A feed inlet (15) and a discharge outlet (16) are arranged above the grinding chamber (1), and the discharge outlet (16) is arranged below the grinding chamber (1). A grinding assembly (11) is arranged inside the grinding chamber (1), and the grinding assembly (11) comprises a fixed grinding disc (111) fixedly arranged on the grinding chamber (1), a movable grinding disc (112) arranged below the fixed grinding disc (111), and a main shaft (13). A grinding opening (1111) is arranged on the fixed grinding disc (111), and the grinding opening (1111) is communicated with the feed inlet (15). The main shaft (13) is arranged below the movable grinding disc (112) for supporting the movable grinding disc (112), and the main shaft (13) and the movable grinding disc (112) are connected in a transmission manner. The bran beating bin (2) is arranged below the grinding bin (1) and is in communication with the discharge port (16); the main shaft (13) passes through the bran beating bin (2) and is connected to a driving member; a bran beating assembly (21) is arranged inside the bran beating bin (2); the bran beating assembly (21) is rotatably arranged on the main shaft (13), and the bran beating assembly (21) is drivingly connected to the main shaft (13); The screening bin (3) is provided with a first outlet (31) and a second outlet (32), and the inlet of the screening bin (3) is connected to an outlet provided at the bottom of the bran beating bin (2) via a feeding device; The air separation bin (4) is provided with a powder outlet (414) and a skin outlet (426), and the inlet of the air separation bin (4) is connected to the first outlet (31); The inlet of the fine grinding chamber (5) is connected to the second outlet (32) and the powder outlet (414) respectively.

2. A flour grinding device according to claim 1, characterized in that: The bran beating assembly (21) comprises a plurality of rotating drums (211) rotatably arranged on a main shaft (13), a plurality of bran beating rollers (213) mounted on the rotating drum (211), and a planetary gear (212) for transmission between the plurality of rotating drums (211); the plurality of bran beating rollers (213) are evenly mounted on the rotating drum (211) along the circumference of the rotating drum (211); the plurality of rotating drums (211) are stacked on the main shaft (13) along the axial direction of the main shaft (13); the planetary gear (212) is mounted between adjacent rotating drums (211); and the rotating drum (211) is transmission-connected to the main shaft (13).

3. A flour grinding device according to claim 2, characterized in that: The rotating drum (211) comprises a sleeve shaft portion (2111), an inner tooth portion (2112) and an outer tooth portion (2113); the sleeve shaft portion (2111) is arranged in a ring shape; the inner tooth portion (2112) is arranged on one end face of the sleeve shaft portion (2111); the outer tooth portion (2113) is arranged on the other end face of the sleeve shaft portion (2111); the inner tooth portion (2112), the outer tooth portion (2113) and the sleeve shaft portion (2111) are all arranged coaxially. The diameter of the outer annular surface of the inner tooth portion (2112) is smaller than the diameter of the inner annular surface of the outer tooth portion (2113), and the outer circumferential surface of the inner tooth portion (2112) and the inner circumferential surface of the outer tooth portion (2113) are matched to be provided with gear teeth, the outer tooth portion (2113) is sleeved on the inner tooth portion (2112) of the adjacent rotating cylinder (211), and the planetary gear (212) is arranged between the outer tooth portion (2113) and the inner tooth portion (2112) of the adjacent rotating cylinder (211).

4. A flour grinding device according to claim 2, characterized in that: A gearbox (22) is provided at the bottom of the bran beating assembly (21); an input end of the gearbox (22) is drivingly connected to the main shaft (13); and an output end of the gearbox (22) is drivingly connected to the rotating drum (211) located at the bottom of the bran beating assembly (21).

5. A flour grinding device according to any one of claims 1 to 4, characterized in that: The air separation bin (4) is provided with an air separation component (41), a skin discharging component (42) and a vibration component (43), the air separation component (41) comprises a filter screen (411) and a negative pressure fan (412), a powder outlet (414) is provided above the air separation bin (4), the negative pressure fan (412) is provided above the air separation bin (4) and is connected to the powder outlet (414), the filter screen (411) is covered on the powder outlet (414), and the powder outlet (414) is connected to the inlet of the fine grinding bin (5); The skin discharging component (42) comprises a conveying net (421) and a partition (422); a skin discharging port (426) is provided below the air separation bin (4); the partition (422) isolates the skin discharging port (426) from the interior of the air separation bin (4); the conveying net (421) is provided below the powder discharging port (414) and one end thereof passes through the partition (422) and is located above the skin discharging port (426); and ventilation holes are provided on the conveying net (421); The vibration component (43) is located below the conveying net (421), and the vibration component (43) is located on a side of the partition (422) close to the powder outlet (414).

6. A flour grinding device according to claim 5, characterized in that: The skin discharging component (42) further includes a flexible scraper (424) and a sealing baffle (425), wherein the sealing baffle (425) is fixedly arranged inside the air separation bin (4), and the sealing baffle (425) is arranged between the conveying net (421) and the partition (422), and the flexible scraper (424) is fixedly arranged inside the air separation bin (4), and the flexible scraper (424) is arranged below the conveying net (421), and a gap is left between the flexible scraper (424) and the conveying net (421).

7. A flour grinding device according to claim 5, characterized in that: A first brush (423) and a second brush (427) are also fixedly arranged inside the air separation bin (4); the first brush (423) is arranged below the conveying net (421), and the first brush (423) is arranged in contact with the conveying net (421); the second brush (427) is arranged inside the conveying net (421), and the second brush (427) is arranged in contact with the lower half of the conveying net (421).

8. A flour grinding device according to claim 5, characterized in that: The vibration assembly (43) comprises a first vibration screen (431), a second vibration screen (432), a flat grinding roller (433) and a conveying assembly (434); the first vibration screen (431) is arranged obliquely below the conveying net (421); the first end of the first vibration screen (431) is lower than the second end of the first vibration screen (431); the flat grinding roller (433) is arranged below the first end of the first vibration screen (431); the second vibration screen (432) is arranged obliquely below the flat grinding roller (433); an end of the second vibration screen (432) away from the flat grinding roller (433) is lower than an end of the second vibration screen (432) close to the flat grinding roller (433); an inlet of the conveying assembly (434) is connected to an end of the second vibration screen (432) away from the flat grinding roller (433); and an outlet of the conveying assembly (434) is connected to the second end of the first vibration screen (431).

9. A flour grinding device according to claim 8, characterized in that: The vibration assembly (43) further comprises a flexible connector (435) and a sealing member (436), and the first vibration screen (431) and the second vibration screen (432) are both installed inside the air separation bin (4) via the flexible connector (435); A sealing member (436) is also provided between the first vibrating screen (431) and the inner wall of the air separation bin (4), and between the second vibrating screen (432) and the inner wall of the air separation bin (4); A flow guide (437) is also provided between the first vibrating screen (431) and the flat grinding roller (433).

10. A flour grinding device according to any one of claims 1 to 4, characterized in that: A hydraulic push rod (12) is also installed inside the grinding chamber (1); a support platform (14) is fixedly arranged on the inner wall of the grinding chamber (1); a limiting groove (1112) is arranged at the bottom of the fixed grinding disc (111); one end of the hydraulic push rod (12) is fixedly arranged in the limiting groove (1112), and the other end of the hydraulic push rod (12) is supported on the support platform (14).

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