Flour milling device

Abstract

The invention relates to the technical field of flour milling devices, and discloses a flour milling device which comprises a box body, a crushing mechanism, a separating mechanism and a grinding mechanism, a feeding opening is formed in the top end of the box body, the separating mechanism comprises a discharging plate, a material guiding pipe, an air floating assembly and a collecting assembly, and the discharging plate is arranged on the outer side of the material guiding pipe in a sleeving mode; the peripheral side of the material falling plate inclines towards the direction close to the top of the box body, a plurality of air outlet holes are formed in the side, close to the crushing mechanism, of the material falling plate, an air channel is formed in the material falling plate, the multiple air outlet holes communicate with the air channel, the air floating assembly comprises an air pump, the air pump communicates with the air channel formed in the material falling plate, and the collecting assembly comprises a first negative pressure fan and a collecting pipe. The first negative pressure fan communicates with the collecting pipe, a plurality of collecting openings are formed in the side wall of the box body and communicate with the collecting pipe, a material guiding opening is formed in the side wall of the material guiding pipe, and the material guiding pipe communicates with the grinding mechanism. The problem that the subsequent flour processing effect is affected due to the poor bran removal effect can be relieved.

Description

Technical Field

[0001] The present application relates to the field of grinding devices, and in particular to a flour grinding device. Background Art

[0002] A flour milling device is a wheat processing machine that relies on external power to grind wheat into small particles and separates flour particles of different sizes by adjusting the size of the sieve holes to obtain small flour particles.

[0003] Traditional flour grinding devices include stone flour grinding devices and steel flour grinding devices. When processing wheat, this type of flour grinding device does not separate the ground skin-core mixture but directly grinds it again, which makes the flour darker.

[0004] At present, when processing wheat, the bran of wheat is first separated from the wheat grains by using a bran removal device, and then the wheat grains are ground by a flour milling device, so that the flour produced is whiter in color. The Chinese invention patent with the announcement number CN110665590B discloses a bran removal device, including a box body, a fixed rod is fixedly installed on the upper part of the box body, an electric roller is movably installed on the outer wall of the fixed rod, an air heating ring is installed outside the electric roller, an air guide layer is arranged on the outer wall of the air heating ring, a fan is fixedly installed on the outer wall of the anti-fouling layer, a separation roller is movably installed inside the box body, a blower is arranged below the inner wall on the right side of the box body, a bran collection box is movably installed on the outer wall of the box body, and a discharge pipe is installed at the bottom of the box body.

[0005] With regard to the above-mentioned related technologies, the inventors believe that the bran and wheat grains are mixed and fall to the bottom of the box. No obvious stratification will occur during the free fall of the bran and wheat grains. After the bran and wheat grains accumulate at the bottom of the box, part of the bran is mixed in the wheat grains. Only part of the bran floating on the surface can be blown into the bran collection box by a blower, resulting in a poor bran removal effect, which affects the subsequent flour processing effect. Summary of the invention

[0006] In order to alleviate the problem that poor bran removal affects subsequent flour processing, the present application provides a flour grinding device.

[0007] The present application provides a flour grinding device, which adopts the following technical solution: A flour grinding device comprises a box body, a crushing mechanism, a separation mechanism and a grinding mechanism, wherein the box body is vertically arranged, a feed port is opened at the top of the box body, the separation mechanism is arranged inside the box body, and the separation mechanism is located below the feed port, the separation mechanism comprises a blanking plate, a guide pipe, an air flotation component and a collecting component, the blanking plate is an annular plate, the blanking plate is sleeved on the outside of the guide pipe, the inner peripheral side of the blanking plate is fixedly connected to the guide pipe, the outer peripheral side of the blanking plate is fixedly connected to the inner wall of the box body, the outer peripheral side of the blanking plate is inclined toward the direction close to the top of the box body, the crushing mechanism is located on the side of the blanking plate close to the feed port, and the crushing mechanism is arranged on the side of the blanking plate close to the feed port. The mechanism is used to crush wheat into wheat grains and bran. A plurality of air outlet holes are provided on one side of the blanking plate close to the crushing mechanism. An air passage is provided in the blanking plate, and the plurality of air outlet holes are all connected to the air passage. The air flotation component includes an air pump, and the air pump is connected to the air passage provided in the blanking plate. The collecting component includes a first negative pressure fan and a collecting pipe, and the collecting pipe is sleeved on the outside of the box body, and the first negative pressure fan is connected to the collecting pipe. A plurality of collecting ports are provided on the side wall of the box body, and the collecting ports are connected to the collecting pipe. A material guide port is provided on the side wall of the material guide pipe, and the material guide pipe is connected to a grinding mechanism. The grinding mechanism is used to grind the wheat grains into flour.

[0008] By adopting the above technical scheme, a crushing mechanism is arranged below the feed inlet, and after the wheat enters the box through the feed inlet, the crushing mechanism is used to crush the wheat into wheat grains and bran. In the process of the wheat grains and bran falling, an air pump is used to pump air into the air channel of the blanking plate, and the air is blown out from the air outlet. By using multiple air outlets, the air is sprayed to the area above the blanking plate, so that the lighter bran is separated from the heavier wheat grains. After the wheat grains fall on the blanking plate, they enter the guide pipe through the guide port under the action of gravity, and then enter the grinding mechanism through the guide pipe to be ground into flour. At the same time, through the action of negative pressure, the lighter bran is sucked into the collecting pipe through the collecting port, thereby further realizing the effective separation of bran and wheat grains, facilitating subsequent processing, and alleviating the problem of affecting the subsequent flour processing effect due to poor bran removal effect.

[0009] Optionally, a first filter is provided on one side of the blanking plate close to the crushing mechanism, and the first filter is used to block the wheat grains.

[0010] By adopting the above technical solution, a first filter is arranged on the side of the blanking plate close to the crushing mechanism, and the first filter is used to block the wheat grains so that the wheat grains enter the collecting port along the blanking plate, thereby reducing the possibility of the wheat grains entering the air outlet and ensuring the working effect of the air outlet.

[0011] Optionally, a plurality of combing rods are provided on the blanking plate, and the combing rods are fixedly connected to a side of the blanking plate close to the crushing mechanism, and the plurality of combing rods are evenly distributed on the blanking plate, and the combing rods are cylindrical structures, and the axes of the combing rods are perpendicular to the blanking plate.

[0012] By adopting the above technical scheme, multiple combing rods are evenly distributed on the blanking plate, and it is inevitable that some bran will stick to the wheat grains or be mixed in the wheat grains and fall on the blanking plate. When the wheat material flows through the combing rod, the cylindrical structure of the combing rod will have a certain impact and combing effect on the material, so that the wheat grains are separated from the adhered bran. At the same time, under the combing effect of the combing rod on the material, the lighter bran moves to the surface of the material, is blown up under the synergistic action of the flotation component, and is collected by the collecting component, thereby improving the separation effect of the wheat grains and bran; in addition, by setting the combing rod to a cylindrical structure and making the combing rod perpendicular to the blanking plate, the possibility of the material being stuck between the combing rod and the blanking plate is reduced, thereby ensuring the smoothness of the movement of the material on the blanking plate.

[0013] Optionally, the crushing mechanism includes a first motor, a guide plate and two crushing rollers, the crushing rollers are rotatably connected between two opposite inner walls of a box body, the rotation axes of the two crushing rollers are arranged in parallel, the first motor is fixedly connected to the outer wall of the box body, the output shaft of the first motor is transmission connected to the two crushing rollers through a gear transmission structure, the guide plate is arranged on the side of the crushing roller close to the blanking plate, the guide plate is fixedly connected to the box body, the guide plate includes a bending portion and two guide portions, the bending portion is connected between the two guide portions, the guide portion is inclined, and the end of the guide portion away from the bending portion is inclined toward the direction close to the blanking plate, a plurality of blanking holes are provided on the guide plate, and the bending portion of the guide plate is located below the middle position of the two crushing rollers.

[0014] By adopting the above technical scheme, wheat enters the box from the feed inlet and falls between the two crushing rollers. The two crushing rollers crush the wheat into wheat grains and bran during rotation. A guide plate is arranged on the side of the crushing roller close to the blanking plate. The bending portion of the guide plate is located below the middle position of the two crushing rollers. The crushed wheat grains and bran fall on the guide plate. The wheat grains and bran slide along the guide portion of the guide plate to the two sides of the bending portion. The wheat grains and bran continue to fall through the blanking holes during the sliding process on the guide plate. The guide plate is used to disperse the crushed wheat grains and bran, expand the blanking area, and improve the working effect of the flotation component. In addition, the wheat grains and bran have been initially separated during the movement on the guide plate. The gas blown out by the flotation component is guided by the guide plate to blow the falling bran to a position close to the inner wall of the box, which helps the collecting component to suck the bran into the collecting port opened on the side wall of the box, thereby improving the collection efficiency of the collecting component for bran.

[0015] Optionally, the distribution of the blanking holes gradually becomes denser from one end of the guide portion close to the bending portion to one end of the guide portion away from the bending portion, and the aperture of the blanking holes gradually increases from one end of the guide portion close to the bending portion to one end of the guide portion away from the bending portion.

[0016] By adopting the above technical scheme, the area of ​​the guide part away from the bending part is provided with more drop holes than the area of ​​the guide part close to the bending part, and the aperture of the drop holes gradually increases from the end of the guide part close to the bending part to the end of the guide part away from the bending part. While the guide plate is used to disperse the wheat grains and bran, the moving path of the wheat grains and bran on the guide plate is increased, and the effect of the guide plate on the preliminary separation of the wheat grains and bran is improved, so that more bran falls from the area close to the inner wall of the box, which helps the collecting component to suck the bran into the collecting port opened on the side wall of the box, thereby improving the collection efficiency of the collecting component for bran.

[0017] Optionally, the grinding mechanism includes a grinding jar, a grinding roller and a driving assembly, the material guide pipe is connected to the grinding jar, the grinding jar includes a grinding part and a receiving part, the grinding part is a hollow truncated cone structure, the receiving part is a hollow cylindrical structure, the grinding part of the grinding jar is coaxially arranged with the receiving part, the smaller bottom of the grinding part is connected to the material guide pipe, the larger bottom surface of the grinding part is connected with the receiving part, the grinding roller is located inside the grinding jar, the grinding roller and the grinding jar are arranged correspondingly, a wing plate is provided on the circumference of the grinding roller, the wing plate is arranged along the grinding surface of the grinding roller, the wing plate is sealingly and slidably connected with the inner wall of the receiving part, a filter hole is opened on the wing plate, and the filter hole is for flour particles meeting the particle size requirements to pass through, the driving assembly is transmission-connected to the grinding roller, the driving assembly is used to drive the grinding roller to rotate, a discharge pipe is connected to the bottom of the grinding jar, one end of the discharge pipe is connected with the receiving part of the grinding jar, and the other end of the discharge pipe is connected with the outside of the box.

[0018] By adopting the above technical scheme, the guide pipe is connected with the inside of the grinding tank, and the separated wheat grains enter the grinding tank through the guide pipe. After entering the grinding tank, the wheat grains fall between the grinding roller and the inner wall of the grinding part, and the driving component is used to drive the grinding roller to rotate. During the rotation of the grinding roller, the wheat grains are ground into flour. A wing plate is arranged on the peripheral side of the grinding roller, and the flour particles meeting the particle size requirements fall into the storage part of the grinding roller through the filtering holes provided on the wing plate, and the flour in the storage part is discharged from the box body through the discharge pipe, thereby improving the production efficiency of flour. In addition, the grinding surface of the grinding roller is arranged inclined. As the grinding roller rotates, under the action of centrifugal force, the flour particles with smaller particle size are deposited on the surface of the grinding roller, and the flour particles with larger particle size float on the side of the flour particles with smaller particle size close to the grinding part, which is beneficial to fully grinding the flour with larger particle size, and is also beneficial for the flour particles meeting the particle size requirements to fall into the storage part of the grinding roller through the filtering holes for discharge, thereby further improving the production efficiency of flour.

[0019] Optionally, the driving assembly includes a second motor, an electric push cylinder, a first gear and a second gear. The grinding roller is fixedly connected to a connecting shaft at one end near the bottom of the box body. The electric push cylinder is fixedly connected to the box body. The connecting shaft passes through the grinding jar and is rotatably connected to the piston rod of the electric push cylinder. The connecting shaft is sealingly and slidingly connected to the grinding jar. The first gear is coaxially fixedly connected to the connecting shaft. The second gear is coaxially fixedly connected to the output shaft of the second motor. The second motor is fixedly connected to the box body. The thickness of the first gear is greater than the thickness of the second gear, and the first gear is meshing with the second gear.

[0020] Optionally, a discharge trough is provided on the smaller end face of the grinding roller, and the discharge trough is connected to the storage portion of the grinding jar via a discharge channel provided inside the grinding roller. A second filter is fixedly connected to the grinding roller, and the second filter is used to filter flour particles entering the discharge trough. The discharge pipe is connected to a second negative pressure fan, and the second negative pressure fan is used to extract air from the storage portion of the grinding jar.

[0021] By adopting the above technical scheme, a feeding trough is opened on the smaller end face of the grinding roller, and a discharge channel connected thereto is provided, so that the ground flour particles can be smoothly transferred from the grinding area to the storage part of the grinding jar, thereby improving the fluidity of the flour particles between the grinding roller and the grinding jar, reducing the possibility of blockage, and improving the grinding efficiency. At the same time, by extracting the air in the storage part of the grinding jar, it can not only help the flour particles to pass through the discharge channel and the filter holes more smoothly, reducing residue and accumulation, but also help maintain the negative pressure environment in the grinding area, prevent external impurities from entering the grinding system, and ensure the cleanliness and safety of the grinding process; excessively high temperature will affect the taste of processed wheat. When the equipment processes wheat at a suitable temperature, it will retain the nutrients in the wheat. The air flow on the surface of the grinding roller and in the discharge channel helps to cool the grinding roller, thereby improving the processing effect of flour.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: By arranging a crushing mechanism below the feed inlet, the wheat enters the box through the feed inlet and is crushed into wheat grains and bran by the crushing mechanism. In the process of wheat grains and bran falling, an air pump is used to pump air into the air passage of the blanking plate, and the air is blown out through the air outlet holes. By using multiple air outlet holes to spray air to the area above the blanking plate, the lighter bran is separated from the heavier wheat grains. After the wheat grains fall on the blanking plate, they enter the guide pipe through the guide port under the action of gravity, and then enter the grinding mechanism through the guide pipe to be ground into flour. At the same time, through the action of negative pressure, the lighter bran is sucked into the collecting pipe through the collecting port, thereby further realizing the effective separation of bran and wheat grains, facilitating subsequent processing, and alleviating the problem that the subsequent flour processing effect is affected by the poor bran removal effect. By evenly distributing multiple combing rods on the blanking plate, it is inevitable that some bran will stick to the wheat grains or be mixed in the wheat grains and fall on the blanking plate. When the wheat material flows through the combing rod, the cylindrical structure of the combing rod will have a certain impact and combing effect on the material, so that the wheat grains are separated from the adhered bran. At the same time, under the combing effect of the combing rod on the material, the lighter bran moves to the surface of the material, is blown up under the synergistic effect of the air flotation component, and is collected by the collecting component, thereby improving the separation effect of the wheat grains and the bran; in addition, by setting the combing rod as a cylindrical structure and making the combing rod perpendicular to the blanking plate, the possibility of the material being stuck between the combing rod and the blanking plate is reduced, thereby ensuring the smoothness of the material moving on the blanking plate; After wheat enters the box from the feed inlet, it falls between the two crushing rollers. The two crushing rollers crush the wheat into wheat grains and bran during rotation. A guide plate is arranged on the side of the crushing roller close to the blanking plate. The bending portion of the guide plate is located below the middle position of the two crushing rollers. The crushed wheat grains and bran fall on the guide plate, and slide along the guide portion of the guide plate to the two sides of the bending portion. The wheat grains and bran continue to fall through the blanking holes during the sliding process on the guide plate. The guide plate is used to disperse the crushed wheat grains and bran, expand the blanking area, and improve the working effect of the flotation component. In addition, the wheat grains and bran have already undergone preliminary separation during the movement on the guide plate. The gas blown out by the flotation component is guided by the guide plate and blows the falling bran to a position close to the inner wall of the box, which helps the collecting component to suck the bran into the collecting port opened on the side wall of the box, thereby improving the collection efficiency of the collecting component for bran. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is a cross-sectional view of an embodiment of the present application; Figure 3 It is a structural schematic diagram of the guide plate part in the embodiment of the present application; Figure 4 It is a schematic diagram of the structure of the blanking plate and the air flotation component in the embodiment of the present application; Figure 5 It is a schematic diagram of the structure of the grinding tank and grinding roller parts in the embodiment of the present application.

[0024] Reference numerals: 100, box; 110, feed port; 120, collection port; 200, crushing mechanism; 210, crushing roller; 220, first motor; 230, guide plate; 231, bending portion; 232, guide portion; 233, drop hole; 300, separation mechanism; 310, drop plate; 320, guide pipe; 321, guide port; 330, air flotation component; 331, air outlet; 332, air duct; 333, air pump; 340, collection component; 341, first negative pressure fan; 342, Collecting tube; 350, first filter; 360, combing rod; 400, grinding mechanism; 410, grinding tank; 411, grinding part; 412, accommodating part; 420, grinding roller; 421, material chute; 422, discharge channel; 430, driving assembly; 431, second motor; 432, electric push cylinder; 433, first gear; 434, second gear; 440, wing plate; 441, filter hole; 450, connecting shaft; 460, second filter; 500, discharge pipe; 600, second negative pressure fan. DETAILED DESCRIPTION

[0025] In order to more clearly explain the overall concept of this application, the following Figure 1-Figure 5 This application is described in further detail.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment may be combined with each other without conflict.

[0027] The present application embodiment discloses a flour grinding device. Figure 1 and Figure 2 A flour grinding device includes a box body 100, and a crushing mechanism 200, a separation mechanism 300 and a grinding mechanism 400 are installed inside the box body 100. The box body 100 is vertically arranged, and a feed inlet 110 is opened at the top of the box body 100.

[0028] Reference Figure 1 and Figure 2The crushing mechanism 200 includes a first motor 220, a guide plate 230 and two crushing rollers 210. The crushing rollers 210 are rotatably connected between two opposite inner walls of the box body 100, and the rotation axes of the two crushing rollers 210 are arranged in parallel. The first motor 220 is fixedly connected to the outer wall of the box body 100, and the output shaft of the first motor 220 is transmission-connected to the two crushing rollers 210 through a gear transmission structure. The guide plate 230 is arranged on the side of the crushing roller 210 close to the blanking plate 310, and the guide plate 230 is fixedly connected to the box body 100. The guide plate 230 includes a bending portion 231 and two guide portions 232. The bending portion 231 is connected between the two guide portions 232, and the guide portion 232 is inclined. The end of the guide portion 232 away from the bending portion 231 is inclined toward the direction close to the blanking plate 310. A plurality of material dropping holes 233 are formed on the material guide plate 230 , and a bent portion 231 of the material guide plate 230 is located below the middle position of the two crushing rollers 210 .

[0029] Reference Figure 2 and Figure 3 The distribution of the blanking holes 233 gradually becomes denser from one end of the guide portion 232 close to the bending portion 231 to one end of the guide portion 232 away from the bending portion 231. The aperture of the blanking holes 233 gradually increases from one end of the guide portion 232 close to the bending portion 231 to one end of the guide portion 232 away from the bending portion 231.

[0030] The wheat enters the box 100 from the feed port 110 and falls between the two crushing rollers 210. The two crushing rollers 210 crush the wheat into wheat grains and bran during the rotation process.

[0031] Reference Figure 2 and Figure 4The separation mechanism 300 includes a blanking plate 310, a guide tube 320, an air flotation assembly 330 and a collection assembly 340. The blanking plate 310 is an annular plate, which is sleeved on the outer side of the guide tube 320. The inner peripheral side of the blanking plate 310 is fixedly connected to the guide tube 320, and the outer peripheral side of the blanking plate 310 is fixedly connected to the inner wall of the box body 100. The outer peripheral side of the blanking plate 310 is inclined toward the top of the box body 100. The crushing mechanism 200 is located above the blanking plate 310. A plurality of air outlet holes 331 are provided on the side of the blanking plate 310 close to the crushing mechanism 200. An air duct 332 is provided in the blanking plate 310, and the plurality of air outlet holes 331 are all connected to the air duct 332. The air flotation assembly 330 includes an air pump 333, and the air pump 333 is connected to the air duct 332 provided in the blanking plate 310. The collecting assembly 340 includes a first negative pressure fan 341 and a collecting pipe 342. The collecting pipe 342 is sleeved on the outside of the box 100. The first negative pressure fan 341 is connected to the collecting pipe 342. A plurality of collecting ports 120 are provided on the side wall of the box 100. The collecting ports 120 are connected to the collecting pipe 342. A material guide port 321 is provided on the side wall of the material guide pipe 320. The material guide pipe 320 is connected to the grinding mechanism 400.

[0032] As the wheat grains and bran fall, air is pumped into the air channel 332 of the blanking plate 310 by the air pump 333, and the air is blown out from the air outlet 331. By using multiple air outlet holes 331 to spray air toward the area above the blanking plate 310, the lighter bran is separated from the heavier wheat grains. After the wheat grains fall on the blanking plate 310, they enter the guide pipe through the guide port 321 under the action of gravity, and then enter the grinding mechanism 400 through the guide pipe to be ground into flour. At the same time, through the action of negative pressure, the lighter bran is sucked into the collecting pipe 342 through the collecting port 120, thereby further achieving effective separation of bran and wheat grains, facilitating subsequent processing, and alleviating the problem of poor bran removal effect affecting subsequent flour processing effect.

[0033] Reference Figure 4 A first filter screen 350 is provided on one side of the blanking plate 310 close to the crushing mechanism 200. The first filter screen 350 is used to block the wheat grains. The first filter screen 350 blocks the wheat grains so that the wheat grains enter the collecting port 120 along the blanking plate 310, thereby reducing the possibility of the wheat grains entering the air outlet 331 and ensuring the working effect of the air outlet 331.

[0034] A plurality of combing rods 360 are installed on the blanking plate 310. The combing rods 360 are fixedly connected to one side of the blanking plate 310 close to the crushing mechanism 200. The plurality of combing rods 360 are evenly distributed on the blanking plate 310. The combing rods 360 are cylindrical structures, and the axes of the combing rods 360 are perpendicular to the blanking plate 310. It is inevitable that some bran will adhere to the wheat grains or be mixed in the wheat grains and fall on the blanking plate 310. When the wheat material flows through the combing rods 360, the cylindrical structure of the combing rods 360 will have a certain impact and combing effect on the material, so that the wheat grains are separated from the adhered bran. At the same time, under the combing effect of the combing rods 360 on the material, the lighter bran moves to the surface of the material, is blown up under the coordinated action of the air flotation component 330, and is collected by the collecting component 340, so as to improve the separation effect of the wheat grains and the bran. In addition, by configuring the combing rod 360 to be a cylindrical structure and the combing rod 360 to be perpendicular to the blanking plate 310 , the possibility of the material being stuck between the combing rod 360 and the blanking plate 310 is reduced, thereby ensuring the smooth movement of the material on the blanking plate 310 .

[0035] The guide plate 230 is arranged below the crushing roller 210, and the bending portion 231 of the guide plate 230 is located below the middle position of the two crushing rollers 210. The crushed wheat grains and bran fall on the guide plate 230, and the wheat grains and bran slide along the guide portion 232 of the guide plate 230 toward the two sides of the bending portion 231. The wheat grains and bran continue to fall through the drop holes 233 during the sliding process on the guide plate 230. The guide plate 230 is used to disperse the crushed wheat grains and bran, expand the drop area, and improve the working effect of the air flotation component 330. In addition, wheat grains and bran have undergone preliminary separation in the process of moving on the guide plate 230. The gas blown out of the air outlet 331 is guided by the guide plate 230 to blow the falling bran to a position close to the inner wall of the box body 100, which helps the collecting component 340 to suck the bran into the collecting port 120 opened on the side wall of the box body 100, thereby improving the collection efficiency of the collecting component 340 for bran.

[0036] The guide portion 232 of the guide plate 230 is provided with more drop holes 233 in the area away from the bending portion 231 than in the area close to the bending portion 231 of the guide portion 232, and the aperture of the drop holes 233 gradually increases from one end of the guide portion 232 close to the bending portion 231 to the end of the guide portion 232 away from the bending portion 231. While the guide plate 230 is used to disperse the wheat grains and bran, the moving path of the wheat grains and bran on the guide plate 230 is increased, thereby improving the effect of the guide plate 230 on the preliminary separation of the wheat grains and bran, so that more bran falls from the area close to the inner wall of the box body 100, which helps the collecting component 340 to suck the bran into the collecting port 120 opened on the side wall of the box body 100, thereby improving the collection efficiency of the collecting component 340 for bran.

[0037] Reference Figure 2and Figure 5 The grinding mechanism 400 includes a grinding jar 410, a grinding roller 420 and a driving assembly 430. The grinding jar 410 includes a grinding portion 411 and a receiving portion 412. The grinding portion 411 is a hollow truncated cone structure, and the receiving portion 412 is a hollow cylindrical structure. The grinding portion 411 and the receiving portion 412 of the grinding jar 410 are coaxially arranged. The smaller bottom of the grinding portion 411 is connected to the guide tube 320, and the guide tube 320 is connected to the grinding portion 411 of the grinding jar 410; the larger bottom surface of the grinding portion 411 is connected to the receiving portion 412. The grinding roller 420 is located inside the grinding jar 410, and the grinding roller 420 is arranged corresponding to the grinding jar 410. A wing plate 440 is arranged on the circumferential side of the grinding roller 420, and the wing plate 440 is arranged along the grinding surface of the grinding roller 420. The wing plate 440 is sealingly and slidingly connected to the inner wall of the accommodating portion 412, and a filter hole 441 is opened on the wing plate 440, and the filter hole 441 is for flour particles that meet the particle size requirements to pass through.

[0038] The driving assembly 430 includes a second motor 431, an electric push cylinder 432, a first gear 433 and a second gear 434. A connecting shaft 450 is fixedly connected to one end of the grinding roller 420 near the bottom of the housing 100. The electric push cylinder 432 is fixedly connected to the housing 100. The connecting shaft 450 passes through the grinding jar 410 and is rotatably connected to the piston rod of the electric push cylinder 432. The connecting shaft 450 is sealed and slidably connected to the grinding jar 410. The first gear 433 is coaxially fixedly connected to the connecting shaft 450. The second gear 434 is coaxially fixedly connected to the output shaft of the second motor 431. The second motor 431 is fixedly connected to the housing 100. The thickness of the first gear 433 is greater than the thickness of the second gear 434. The first gear 433 meshes with the second gear 434.

[0039] The separated wheat grains enter the grinding tank 410 through the guide tube 320. After entering the grinding tank 410, the wheat grains fall between the grinding roller 420 and the inner wall of the grinding part 411. The output shaft of the second motor 431 drives the connecting shaft 450 to rotate through the transmission of the first gear 433 and the second gear 434, thereby driving the grinding roller 420 to rotate. During the rotation of the grinding roller 420, the wheat grains are ground into flour. The thickness of the first gear 433 is greater than the thickness of the second gear 434. While the first gear 433 and the second gear 434 are kept in meshing, the electric push cylinder 432 is used to adjust the distance between the grinding roller 420 and the grinding tank 410, thereby changing the pressure during the wheat grain grinding process and improving the grinding effect of the wheat grains.

[0040] The wing plate 440 is provided on the peripheral side of the grinding roller 420, and the flour particles meeting the particle size requirements fall into the storage part of the grinding roller 420 through the filter hole 441 provided on the wing plate 440, and the flour in the storage part is discharged from the box 100 through the discharge pipe 500, thereby improving the production efficiency of flour. In addition, the grinding surface of the grinding roller 420 is arranged at an angle, and as the grinding roller 420 rotates, under the action of centrifugal force, the flour particles with smaller particle size are deposited on the surface of the grinding roller 420, and the flour particles with larger particle size float on the side of the flour particles with smaller particle size close to the grinding part 411, which is conducive to fully grinding the flour with larger particle size, and is also conducive to the flour particles meeting the particle size requirements falling into the storage part of the grinding roller 420 through the filter hole 441 for discharge, thereby further improving the production efficiency of flour.

[0041] Reference Figure 5 A discharge trough 421 is provided on the smaller end face of the grinding roller 420, and the discharge trough is connected to the storage part of the grinding jar 410 through a discharge channel 422 provided inside the grinding roller 420. A second filter screen 460 is fixedly connected to the grinding roller 420, and the second filter screen 460 is used to filter the flour particles entering the discharge trough. The discharge pipe 500 is connected to the second negative pressure fan 600, and the second negative pressure fan 600 is used to extract the air in the storage part of the grinding jar 410.

[0042] By providing a feeding trough 421 on the smaller end face of the grinding roller 420 and setting a discharge channel 422 connected thereto, the ground flour particles can be smoothly transferred from the grinding area to the storage part of the grinding tank 410, thereby improving the fluidity of the flour particles between the grinding roller 420 and the grinding tank 410, reducing the possibility of blockage, and improving the grinding efficiency. At the same time, by extracting the air in the storage part of the grinding tank 410, it can not only help the flour particles to pass through the discharge channel 422 and the filter hole 441 more smoothly, reducing residue and accumulation, but also help maintain the negative pressure environment in the grinding area, prevent external impurities from entering the grinding system, and ensure the cleanliness and safety of the grinding process. Excessive temperature will affect the taste of processed wheat. When the equipment processes wheat at a suitable temperature, it will retain the nutrients in the wheat. The air flow on the surface of the grinding roller 420 and in the discharge channel 422 helps to cool the grinding roller 420 and improve the processing effect of flour.

[0043] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A flour grinding device, characterized in that: The invention comprises a box body (100), a crushing mechanism (200), a separation mechanism (300) and a grinding mechanism (400), wherein the box body (100) is arranged vertically, a feed inlet (110) is provided at the top of the box body (100), the separation mechanism (300) is arranged inside the box body (100), the separation mechanism (300) is located below the feed inlet (110), and the separation mechanism (300) comprises a material drop plate (310), a material guide pipe (320), an air flotation component (330) and a collection component (340). The blanking plate (310) is an annular plate. The blanking plate (310) is sleeved on the outside of the material guide tube (320). The inner peripheral side of the blanking plate (310) is fixedly connected to the material guide tube (320). The outer peripheral side of the blanking plate (310) is fixedly connected to the inner wall of the box body (100). The outer peripheral side of the blanking plate (310) is inclined in a direction close to the top of the box body (100). The crushing mechanism (200) is located on a side of the blanking plate (310) close to the feed inlet (110). The crushing mechanism (200) The device is used for crushing wheat into wheat grains and bran. A plurality of air outlet holes (331) are provided on a side of the blanking plate (310) close to the crushing mechanism (200). An air passage (332) is provided in the blanking plate (310). The plurality of air outlet holes (331) are all in communication with the air passage (332). The air flotation component (330) comprises an air pump (333). The air pump (333) is in communication with the air passage (332) provided in the blanking plate (310). The collecting component (340) comprises a first negative pressure fan (341) and a second negative pressure fan (342). A collecting pipe (342), the collecting pipe (342) being sleeved on the outside of the box body (100), the first negative pressure fan (341) being connected to the collecting pipe (342), a plurality of collecting ports (120) being provided on the side wall of the box body (100), the collecting ports (120) being connected to the collecting pipe (342), a material guiding port (321) being provided on the side wall of the material guiding pipe (320), the material guiding pipe (320) being connected to a grinding mechanism (400), and the grinding mechanism (400) being used for grinding wheat grains into flour.

2. A flour grinding device according to claim 1, characterized in that: A first filter screen (350) is provided on one side of the blanking plate (310) close to the crushing mechanism (200), and the first filter screen (350) is used to block wheat grains.

3. A flour grinding device according to claim 2, characterized in that: A plurality of combing rods (360) are arranged on the blanking plate (310), the combing rods (360) are fixedly connected to a side of the blanking plate (310) close to the crushing mechanism (200), the plurality of combing rods (360) are evenly distributed on the blanking plate (310), the combing rods (360) are cylindrical structures, and the axes of the combing rods (360) are perpendicular to the blanking plate (310).

4. A flour grinding device according to claim 1, characterized in that: The crushing mechanism (200) comprises a first motor (220), a guide plate (230) and two crushing rollers (210); the crushing rollers (210) are rotatably connected between two opposite inner walls of a box body (100); the rotation axes of the two crushing rollers (210) are arranged in parallel; the first motor (220) is fixedly connected to the outer wall of the box body (100); the output shaft of the first motor (220) is transmission-connected to the two crushing rollers (210) via a gear transmission structure; the guide plate (230) is arranged on a side of the crushing roller (210) close to the blanking plate (310); The material guide plate (230) is fixedly connected to the box body (100), and comprises a bending portion (231) and two guiding portions (232); the bending portion (231) is connected between the two guiding portions (232); the guiding portions (232) are arranged obliquely, and one end of the guiding portion (232) away from the bending portion (231) is inclined toward a direction close to the blanking plate (310); a plurality of blanking holes (233) are provided on the material guide plate (230); and the bending portion (231) of the material guide plate (230) is located below a middle position between the two crushing rollers (210).

5. A flour grinding device according to claim 4, characterized in that: The distribution of the blanking holes (233) gradually becomes denser from one end of the guide portion (232) close to the bending portion (231) to one end of the guide portion (232) away from the bending portion (231), and the aperture of the blanking holes (233) gradually increases from one end of the guide portion (232) close to the bending portion (231) to one end of the guide portion (232) away from the bending portion (231).

6. A flour grinding device according to claim 1, characterized in that: The grinding mechanism (400) comprises a grinding jar (410), a grinding roller (420) and a driving assembly (430); the material guide tube (320) is in communication with the grinding jar (410); the grinding jar (410) comprises a grinding portion (411) and a receiving portion (412); the grinding portion (411) is a hollow truncated cone structure; the receiving portion (412) is a hollow cylindrical structure; the grinding portion (411) and the receiving portion (412) of the grinding jar (410) are coaxially arranged; the smaller bottom portion of the grinding portion (411) is connected to the material guide tube (320); the larger bottom surface of the grinding portion (411) is in communication with the receiving portion (412); the grinding roller (420) is located inside the grinding jar (410); the grinding roller (420) and the grinding jar (410) are aligned with each other. It should be provided that a wing plate (440) is provided on the circumferential side of the grinding roller (420), the wing plate (440) is provided along the grinding surface of the grinding roller (420), the wing plate (440) is sealingly and slidably connected to the inner wall of the accommodating portion (412), the wing plate (440) is provided with a filter hole (441), the filter hole (441) allows flour particles that meet the particle size requirements to pass through, the driving component (430) is transmission-connected to the grinding roller (420), the driving component (430) is used to drive the grinding roller (420) to rotate, and the bottom of the grinding tank (410) is connected to a discharge pipe (500), one end of the discharge pipe (500) is connected to the accommodating portion (412) of the grinding tank (410), and the other end of the discharge pipe (500) is connected to the outside of the box body (100).

7. A flour grinding device according to claim 6, characterized in that: The driving assembly (430) comprises a second motor (431), an electric push cylinder (432), a first gear (433) and a second gear (434); one end of the grinding roller (420) close to the bottom of the housing (100) is fixedly connected to a connecting shaft (450); the electric push cylinder (432) is fixedly connected to the housing (100); the connecting shaft (450) passes through the grinding jar (410) and is rotationally connected to the piston rod of the electric push cylinder (432); the connecting shaft (450) is sealingly and slidingly connected to the grinding jar (410); the first gear (433) is coaxially and fixedly connected to the connecting shaft (450); the second gear (434) is coaxially and fixedly connected to the output shaft of the second motor (431); the second motor (431) is fixedly connected to the housing (100); the thickness of the first gear (433) is greater than the thickness of the second gear (434); and the first gear (433) is meshed with the second gear (434).

8. A flour grinding device according to claim 7, characterized in that: A discharge trough (421) is provided on the smaller end surface of the grinding roller (420); the discharge trough is connected to the storage portion of the grinding jar (410) via a discharge channel (422) provided inside the grinding roller (420); a second filter screen (460) is fixedly connected to the grinding roller (420); the second filter screen (460) is used to filter flour particles entering the discharge trough; the discharge pipe (500) is connected to a second negative pressure fan (600); the second negative pressure fan (600) is used to extract air from the storage portion of the grinding jar (410).

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