Rice hull grading processing device

Abstract

The invention discloses a rice hull grading processing device. The device comprises a pit, a combined cleaning machine, a plurality of hullers, a gas filter, dust separation equipment, a plurality of pieces of opening and impurity removing equipment and a storage bin. The invention relates to the technical field of rice processing, rice makes contact with and collides with a vertical, large, thick and rolling rubber barrel, a plurality of annular spraying areas are formed on a shell from top to bottom through an air spraying assembly, grains are continuously blown by wind power in the falling process, the contact frequency of the grains and the rubber barrel is increased, and therefore effective husking of the grains is achieved. Brown rice in the blanking bin is lifted upwards into the inner barrel body by the lifting blade in the rubber barrel, and when the brown rice flows in the spiral blanking blade, the unshelled brown rice can be cooled in the dust removal process. When rice grains flow in the first grinding cavity and the bent second grinding cavity, the friction effect on the brown rice is improved through repeated collision contact, the pressure on the brown rice is small, and therefore the amount of broken rice is small.

Description

Technical Field

[0001] The invention relates to the technical field of rice processing, in particular to a rice husk grading processing device. Background Art

[0002] In the traditional rice processing, husking is a crucial step. The existing technology mainly uses three rubber rollers to achieve rice husking. Although this technology can achieve the purpose of husking to a certain extent, it has some shortcomings that are difficult to overcome.

[0003] First, due to the arrangement and action mode of the rubber rollers, the rice is often not evenly stressed during the husking process. Some rice is over-husked due to excessive stress, which means that the rice grains are damaged and more broken rice is produced; while some rice is not completely husked due to insufficient stress, which means that some rice still has the husk left, which affects the quality and efficiency of subsequent processing. At the same time, the squeezing operation of the rubber rollers causes the rice to suffer greater pressure and friction during husking, which affects the quality of brown rice.

[0004] Secondly, due to the design limitations of the traditional three-roller huller, it is difficult to effectively cool and remove dust while hulling. This means that the temperature of the brown rice after hulling is high. When it directly enters the subsequent milling process, the high temperature and many impurities will reduce the quality of the milled rice, increase the broken rice rate, and affect the quality of the final rice output.

[0005] In addition, most of the existing rice processing devices do not take into account the effective separation of brown rice and rice husk after husking. In the actual production process, the mixture of brown rice and rice husk after husking often needs further separation, and this process often relies on additional mechanical equipment or manual work, which increases the complexity and cost of production.

[0006] In summary, traditional rice processing equipment has many shortcomings in rice husking effect, brown rice quality protection, heat dissipation and dust removal, and separation of rice husk and brown rice. There is an urgent need for a new technology and equipment that can solve these problems in order to improve the efficiency of rice processing and the overall quality of rice products. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides a rice husk grading processing device, which solves the problems existing in the prior art rice husk processing devices in rice husking effect, brown rice quality protection, heat dissipation and dust removal, and separation of rice husk and brown rice.

[0008] To achieve the above object, the present invention is implemented through the following technical scheme: a rice husk grading processing device, the device comprising a pit, a combined cleaning machine, a plurality of hulling machines, a gas filter, a dust separation device, a plurality of roughing and impurity removal devices and a storage bin;

[0009] The discharge port of the pit is connected with the feed port of the combined cleaning machine, the discharge port of the combined cleaning machine is connected with the feed port of each shelling machine through a plurality of first elevators, the discharge port of each shelling machine is connected with the dust separation device, the dust outlet of each shelling machine is connected with the dust inlet of the gas filter, the discharge port of the dust separation device is connected with the feed port of each roughening and impurity removal device through a plurality of second elevators, the discharge port of each roughening and impurity removal device is connected with the feed port of the storage bin through a third elevator, and the dust outlet of each roughening and impurity removal device is connected with the dust inlet of the gas filter;

[0010] The shelling machine comprises:

[0011] A base, a shell is fixed on the base, and an upper cover is fixed on the shell;

[0012] A material dividing body, arranged in the inner cavity of the upper cover body;

[0013] The shelling mechanism is arranged in the inner cavity of the shell, and the shelling mechanism comprises:

[0014] The rubber cylinder is rotatably connected to the bottom of the material distributing body, a material drop bin is formed between the bottom of the rubber cylinder and the base, and a lower clamping cavity is formed between the outer side of the rubber cylinder and the shell;

[0015] An air spray assembly is fixed on the housing, the air spray assembly comprises an air spray disc, a plurality of air spray heads are fixed on the inner wall of the air spray disc, and the air spray heads are arranged in the lower clamping cavity;

[0016] The device also includes:

[0017] The inner cylinder is arranged in the inner cavity of the rubber cylinder and is rotatably connected to the base; a lifting blade is fixed on the outer wall of the inner cylinder, and the bottom of the lifting blade is located in the material drop bin; a column is formed inside the inner cylinder, and an inner central cavity is formed between the column and the inner cylinder, and a screening assembly is arranged around the circumference of the column, and the screening assembly receives the material after being lifted by the lifting blade;

[0018] The driving mechanism includes a first power device and a driving spindle. The driving spindle is hollow inside and fixedly connected to the column, and can discharge the material in the screening assembly. The output end of the first power device is connected to the driving spindle through a belt; the first power device drives the rubber cylinder to rotate through the transmission belt.

[0019] Preferably, it also includes a compressed air generating device, on which a first air pipeline and a second air pipeline are provided, the first air pipeline is connected to the air spray assembly; the second air pipeline passes through the upper cover body and the material dividing body and is suspended on the column to blow the material lifted by the lifting blades into the screening assembly.

[0020] Preferably, the column and the inner cylinder are integrally formed, the top of the inner cylinder is inclined downward from the edge to the center, and an upper central cavity is formed at the top of the column, a support frame is fixedly connected in the upper central cavity, and the second gas pipeline is rotatably connected to the support frame;

[0021] An upper opening is provided above the column, so that the material falling into the upper central cavity can enter the screening assembly, and the gas outlet of the second gas pipeline is bent and arranged toward the upper opening;

[0022] A lower opening is provided below the column, so that the material in the screening component can fall into the hollow cavity inside the driving spindle through the lower opening.

[0023] Preferably, the screening assembly comprises a spiral feeding blade surrounding a column, wherein the interior of the spiral feeding blade is hollow to form a spiral feeding cavity, and the spiral feeding cavity is respectively connected to an upper opening and a lower opening; a bottom screen is fixed to the bottom surface of the spiral feeding blade.

[0024] Preferably, a notch communicating with the inner central cavity is opened on the base, an inner collecting bin is formed by partitioning inside the base, a first dust exhaust pipe and a second dust exhaust pipe are respectively connected to the top of the shell and the inner collecting bin, and the first dust exhaust pipe and the second dust exhaust pipe are both connected to the dust inlet of the gas filter.

[0025] Preferably, the base is located at the material drop bin part and is fixed with an annular screen, and a vibrator is fixed at the bottom of the annular screen;

[0026] A support seat is arranged in the blanking bin, and the support seat includes an upper ring and a lower ring. The rubber cylinder is rotatably connected to the bottom of the material dividing body and the upper ring through a rotating part, and the lower ring is fixed on the base; the upper ring and the lower ring are connected through a support column, and a cavity is formed between two adjacent support columns.

[0027] Preferably, the material dividing body comprises a conical inner buckle cover, an upper clamping cavity is formed between the inner buckle cover and the upper cover body, the upper clamping cavity is connected with the lower clamping cavity, and a plurality of partition plates are fixed on the inner buckle cover to divide the upper clamping cavity into a plurality of partition compartments.

[0028] Preferably, the roughing and impurity removing equipment comprises a tank body, the top and bottom of the tank body are respectively provided with a rice inlet pipe and a rice outlet pipe, a main shaft is provided in the tank body, and a second power device capable of driving the main shaft to rotate is fixed on the tank body;

[0029] The tank body is provided with rotating grinding bodies and fixed grinding bodies alternately from top to bottom, the rotating grinding bodies are fixedly connected to the main shaft, and the fixed grinding bodies are fixedly connected to the tank body; the center of the fixed grinding body is hollow to form a hollow bin, the main shaft passes through the hollow bin, and the main shaft is located in the hollow bin and a feeding blade is fixed thereon;

[0030] The rotating grinding body includes a stainless steel grinding body and a grinding body fixed to each other, the fixed grinding body includes an upper grinding body and a lower grinding body fixed to each other, a first grinding cavity is formed between the stainless steel grinding body and the lower grinding body, and a second grinding cavity is formed between the grinding body and the upper grinding body.

[0031] Preferably, a powder collecting bin is formed inside the upper grinding body and the lower grinding body, and a cylindrical screen is fixed on one side of the powder collecting bin close to the hollow bin;

[0032] A collecting bin is fixed on one side of the tank body, a slag discharge port is opened on the side wall of the tank body, the slag discharge port is connected to the collecting bin and the powder collecting bin, a dust outlet pipe is connected to the bottom of the collecting bin, and the dust outlet pipe is connected to the dust inlet of the gas filter.

[0033] Preferably, the outer wall surface of the grinding body forms a first curved surface, and the outer wall surface of the upper grinding body forms a second curved surface, and the first curved surface is matched with the second curved surface so that the second grinding chamber is in a continuously curved shape.

[0034] Beneficial effects of the present invention: By using a rice husk grading processing device provided by the present invention, compared with the prior art, the huller can evenly introduce the rice into the lower clamping chamber through the material dividing body, and the rice contacts and collides with the upright, large, thick, rolling rubber cylinder. At the same time, when the grains fall and collide, they will also be rebounded when they hit the shell, forming a process of repeated contact with the rubber cylinder. In addition, the air spray assembly forms a number of annular spray areas from top to bottom on the shell, so that the grains are continuously blown by the wind during the falling process, increasing the number of contacts between the grains and the rubber cylinder, thereby achieving effective hulling of the grains. At the same time, part of the separated rice husks will rise under the blowing of the wind, and the rice husks and brown rice will be directly separated.

[0035] After the hulls are removed and fall into the hopper, the device of the present invention can perform a secondary separation of the rice husk from the brown rice through the annular screen, thereby further improving the separation effect of the rice husk from the brown rice and reducing the impurity content in the brown rice.

[0036] The brown rice in the feeding bin is lifted upward into the inner cylinder by the lifting blades inside the rubber cylinder, and flows downward in an evenly spread state when flowing inside the spiral feeding blades. In this process, the dust impurities inside are screened out and fall into the inner center cavity through the bottom screen. At the same time, the evenly spread brown rice can ensure its heat dissipation when flowing, so that the brown rice after hulling can also be cooled during the dust removal process. In this way, not only the cleanliness of the brown rice can be improved, but also the temperature of the brown rice can be reduced, which is conducive to the subsequent milling process.

[0037] After dust removal and cooling, the brown rice enters the rough and impurity removal equipment for processing. When the rice grains flow in the first grinding chamber and the curved second grinding chamber, especially when they flow in the curved second grinding chamber, the number of collisions and contacts with the grinding body and the upper grinding body can be increased. Repeated collisions and contacts increase the friction effect on the brown rice, reduce the pressure on the brown rice, and thus produce less broken rice. In this way, the grinding efficiency can be improved, the generation of broken rice can be reduced, and the quality of rice can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a diagram of the rice husk grading and processing system of the present invention;

[0039] Figure 2 It is a schematic diagram of the structure of the shelling machine of the present invention;

[0040] Figure 3 It is a top view of the inner buckle cover of the present invention;

[0041] Figure 4 It is a cross-sectional schematic diagram of the inner buckle cover of the present invention;

[0042] Figure 5 It is a schematic diagram of the three-dimensional structure of the support base of the present invention;

[0043] Figure 6 This is a schematic diagram of the structure of the roughening and impurity removal equipment of the present invention;

[0044] Figure 7 It is a schematic diagram of the internal structure of the roughening and impurity removing equipment of the present invention.

[0045] Description of reference numerals in the figures

[0046] 100. Pit;

[0047] 200. Combined cleaning machine;

[0048] 300, first hoist;

[0049] 400, sheller, 41, shell, 42, upper cover, 43, first dust exhaust pipe, 44, partition plate, 45, inner cover, 46, upper clamping chamber, 47, lower clamping chamber, 48, jet disc, 49, inner cylinder, 410, rubber cylinder, 411, drop bin, 412, annular screen, 413, upper center cavity, 414, rotating part, 415, lifting blade, 416, support frame, 417, spiral unloading blade, 418, bottom screen Net, 419, lower opening, 420, upper opening, 421, second dust exhaust pipe, 422, partition, 423, notch, 424, inner collecting bin, 425, driving spindle, 426, inner center cavity, 427, vibrator, 428, first power device, 429, transmission belt, 430, support seat, 4301, upper ring, 4302, lower ring, 4303, cavity, 4304, support column, 431, partition bin;

[0050] 500, compressed air generating device, 501, first gas pipeline, 502, second gas pipeline;

[0051] 600, gas filter;

[0052] 700. Dust separation equipment;

[0053] 800, second hoist;

[0054] 900, roughing and impurity removal equipment, 91, second power device, 92, main shaft, 93, dust outlet pipe, 94, first grinding chamber, 95, fixed grinding body, 951, upper grinding body, 952, lower grinding body, 96, second grinding chamber, 97, slag outlet, 98, collection bin, 99, tank body, 910, rice outlet pipe, 911, rice inlet pipe, 912, rotating grinding body, 9121, stainless steel grinding body, 9122, sand mill body, 9123, first curved surface, 9124, second curved surface, 913, powder collection bin, 914, cylindrical screen, 915, hollow bin, 916, feeding blade;

[0055] 1000, the third hoist;

[0056] 1100. Storage warehouse. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. As long as the effects of the present invention can be exerted, various changes can be made to the implementation scheme.

[0058] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process.

[0059] Reference Figure 1-7 A rice husk grading processing device according to the present embodiment will be described.

[0060] like Figure 1 As shown, it includes a pit 100, a combined cleaning machine 200, a plurality of shelling machines 400, a compressed air generating device 500, a gas filter 600, a dust separation device 700, a plurality of roughening and impurity removal devices 900 and a storage bin 1100.

[0061] like Figure 1 As shown, the discharge port of the pit 100 is connected to the feed port of the combined cleaning machine 200, and the two are connected by a dragon. The grain materials in the pit 100 are transported to the combined cleaning machine 200 by a dragon (screw conveyor) for screening of impurities, mainly removing large impurities, small impurities and side stones in the grains. The discharge port of the combined cleaning machine 200 is connected to the feed port of each shelling machine 400 through a plurality of first hoists 300, and the screened grain materials enter the shelling machine 400 for primary shelling. The discharge port of each shelling machine 400 is connected to the dust separation device 700, and the dust outlet of each shelling machine 400 is connected to the dust inlet of the gas filter 600. The discharge port of the dust separation device 700 is connected to the feed port of each roughing and impurity removal device 900 through a plurality of second hoists 800, and the roughing and impurity removal device 900 grinds the brown rice to form rice. The discharge port of each roughening and impurity removal device 900 is connected to the feed port of the storage bin 1100 through the third elevator 1000 , and the dust outlet of each roughening and impurity removal device 900 is connected to the dust inlet of the gas filter 600 .

[0062] like Figure 2 As shown, the shelling machine 400 includes a base, a material dividing body, a shelling mechanism, an inner cylinder 49 and a driving mechanism.

[0063] A shell 41 is fixed on the base, and an upper cover 42 is fixed on the shell 41; the feed port of the sheller 400 is formed at the top of the upper cover 42, and a dividing body is arranged in the inner cavity of the upper cover 42. The grains entering through the feed port flow into the shell 41 evenly after passing through the dividing body, and the shell is separated.

[0064] like Figure 3As shown, the material dividing body includes a conical inner buckle cover 45, an upper clamping cavity 46 is formed between the inner buckle cover 45 and the upper cover body 42, and a plurality of partition plates 44 are fixed on the inner buckle cover 45 to divide the upper clamping cavity 46 into a plurality of partition chambers 431. The conical inner buckle cover 45 can make the grains flow downward naturally along its surface under the influence of gravity, and be separated by the plurality of partition plates 44 during the flow process, and evenly flow into the shell 41 through the plurality of partition chambers 431.

[0065] The shelling mechanism is arranged in the inner cavity of the shell body 41 , and comprises a rubber cylinder 410 and an air spray assembly, and the rubber cylinder 410 is upright.

[0066] The rubber cylinder 410 is rotatably connected to the bottom of the material dividing body, and a lower clamping chamber 47 is formed between the outer side of the rubber cylinder 410 and the shell 41, and the upper clamping chamber 46 is connected to the lower clamping chamber 47. The grains falling from the partition bin 431 fall into the lower clamping chamber 47, and are blown by the gas sprayed by the air spray assembly during the falling process to act on the rotating rubber cylinder 410. The rubber cylinder 410 collides with the grains in contact with it during the rotation process. At the same time, when the grains fall and collide, they will also be rebounded when they hit the shell 41, forming a process of repeated contact with the rubber cylinder 410, so as to form the shelling of the grains.

[0067] The air spray assembly is fixed on the housing 41, and includes an air jet disc 48, and a plurality of air jet heads are fixed on the inner wall of the air jet disc 48, and the air jet heads are arranged in the lower clamping chamber 47. There are a plurality of air jet discs 48, and a plurality of annular spray areas are formed from top to bottom on the housing 41, so that the grains are continuously blown by the wind during the falling process, and the number of contacts between the grains and the rubber cylinder 410 is increased. At the same time, the separated rice husks will rise under the blowing of the wind and be introduced into the gas filter 600 through the first dust exhaust pipe 43.

[0068] A drop bin 411 is formed between the bottom of the rubber cylinder 410 and the base, and the separated brown rice and part of the rice husk fall into the drop bin 411. An annular screen 412 is fixed to the base located in the drop bin 411, a vibrator 427 is fixed to the bottom of the annular screen 412, and an inner collection bin 424 is formed in the base separated by a partition 422. Under the action of the vibrator 427, the annular screen 412 vibrates continuously or intermittently, so that the dust and rice husk in the brown rice are screened out through the annular screen 412 and fall into the inner collection bin 424.

[0069] The inner cylinder 49 is arranged in the inner cavity of the rubber cylinder 410 and is rotatably connected to the base; the outer wall of the inner cylinder 49 is fixed with a lifting blade 415, and the bottom of the lifting blade 415 is located in the drop bin 411; a column is formed inside the inner cylinder 49; the top of the column is integrally formed with the inner cylinder 49, and the top of the inner cylinder 49 is tilted downward from the edge to the center to form a conical groove, and an upper center cavity 413 is formed at the top of the column. An inner center cavity 426 is formed between the column and the inner cylinder 49, and a screening assembly is arranged around the circumference of the column, and the screening assembly receives the material after being raised by the lifting blade 415. The inner cylinder 49 rotates at the inner side of the rubber cylinder 410. When the inner cylinder 49 rotates, the lifting blades 415 on the outer wall lift the brown rice in the drop bin 411 upward, and make the brown rice fall into the conical groove at the top of the inner cylinder 49, slide down the slope of the conical groove to the upper central cavity 413, and finally fall into the screening assembly to screen the brown rice.

[0070] It should be noted that a support frame 416 is fixedly connected in the upper central cavity 413, and the second gas pipeline 502 is rotatably connected to the support frame 416; the setting of the support frame 416 needs to ensure that it does not affect the flow of brown rice.

[0071] Furthermore, an upper opening 420 is provided on the top of the column, so that the material falling into the upper central cavity 413 can enter the screening assembly, and the gas outlet of the second gas pipeline 502 is bent and arranged toward the upper opening 420; with the above-mentioned design, during the continuous rotation of the inner cylinder 49, the gas ejected from the second gas pipeline 502 will be intermittently blown into the opening 420; when the gas is not blown toward the opening 420 but blown on the inner wall of the upper central cavity 413, the ejected gas will blow on the accumulated brown rice, causing the brown rice to rotate in the upper central cavity 413 and become loose, and enter the opening 420 during the rotation process. When the gas blows toward the opening 420, the brown rice is directly and quickly blown into the opening 420.

[0072] Furthermore, a lower opening 419 is provided below the column, so that the brown rice material in the screening assembly can fall into the hollow cavity inside the driving spindle 425 through the lower opening 419. In actual use, the bottom of the driving spindle 425 is connected to the discharge pipe, and the driving spindle 425 is rotatably connected to the discharge pipe through a bearing. It should be noted that the inner diameter of the discharge pipe must be greater than or equal to the diameter of the hollow cavity inside the driving spindle 425 to ensure the smooth fall of the brown rice.

[0073] The screening component includes a spiral feeding blade 417 surrounding the column, the spiral feeding blade 417 is hollow inside to form a spiral feeding cavity, and the spiral feeding cavity is respectively connected with the upper opening 420 and the lower opening 419; a bottom screen 418 is fixed to the bottom surface of the spiral feeding blade 417. When the brown rice flows inside the spiral feeding blade 417, it flows downward in an evenly spread state in the spiral feeding cavity. During the flow process, the dust impurities inside are screened out and fall into the inner central cavity 426 through the bottom screen 418. At the same time, the evenly spread brown rice can ensure its heat dissipation when flowing, so that the brown rice after shelling can also be cooled during the dust removal process.

[0074] A notch 423 is provided on the base, which is connected to the inner central cavity 426. A first dust exhaust pipe 43 and a second dust exhaust pipe 421 are connected to the top of the shell 41 and the inner collecting bin 424, respectively. The first dust exhaust pipe 43 and the second dust exhaust pipe 421 are both connected to the dust inlet of the gas filter 600. The filtered dust impurities fall into the inner collecting bin 424 through the notch 423, and are finally introduced into the gas filter 600 through the second dust exhaust pipe 421.

[0075] Furthermore, after the brown rice is cooled and impurities are removed by the spiral feeding blades 417, the brown rice can fall into the hollow cavity inside the driving main shaft 425 along the lower opening 419, and finally be exported to the dust separation device 700 for further dust separation.

[0076] like Figure 5 As shown, a support seat 430 is provided in the material bin 411 for supporting the inner cylinder 49. The support seat 430 includes an upper ring 4301 and a lower ring 4302. The rubber cylinder 410 is rotatably connected to the bottom of the material dividing body and the upper ring 4301 through a rotating member 414, and the lower ring 4302 is fixed to the base; the upper ring 4301 and the lower ring 4302 are connected by a support column 4304, and a cavity 4303 is formed between two adjacent support columns 4304. When the brown rice in the material bin 411 is accumulated, it passes through the cavity 4303 and contacts the lifting blade 415.

[0077] In another embodiment of the support base 430 (not shown in the figure), it includes an upper ring 4301 and a plurality of support columns 4304, and the support columns 4304 are directly fixed on the base. This method removes the design of the lower ring 4302, so that the brown rice will not be blocked by the lower ring 4302 when passing through the cavity 4303, making the flow of the brown rice smoother.

[0078] The driving mechanism includes a first power device 428 and a driving spindle 425. In this embodiment, the first power device 428 includes a motor and a driving shaft. The driving spindle 425 is hollow inside and fixedly connected to the column, and can export the material in the screening assembly. The output end of the first power device 428 is connected to the driving spindle 425 through a belt. The belt includes two pulleys, which are respectively installed at the end of the driving shaft and the outer wall of the driving spindle 425, so that the motor can drive the driving spindle 425 to rotate through the belt when it is working, and synchronously drive the column and the inner cylinder 49 to rotate when the driving spindle 425 rotates; the first power device 428 drives the rubber cylinder 410 to rotate through a transmission belt 429, and the transmission belt 429 is also equipped with two pulleys, one is installed on the outer wall of the driving shaft of the first power device 428, and the other is installed on the outer wall of the rubber cylinder 410, so that the motor can drive the rubber cylinder 410 to rotate through the transmission belt 429 when it is working.

[0079] In this embodiment, a first air pipeline 501 and a second air pipeline 502 are provided on the compressed air generating device 500. The first air pipeline 501 is connected to the air spray assembly; the second air pipeline 502 passes through the upper cover body 42 and the material dividing body and is suspended on the column to blow the material lifted by the lifting blades 415 into the screening assembly.

[0080] like Figure 6 and Figure 7 As shown, the roughening and impurity removing equipment 900 of this embodiment includes a tank body 99, and a rice inlet pipe 911 and a rice outlet pipe 910 are respectively provided on the top and bottom of the tank body 99. A main shaft 92 is provided in the tank body 99, and a second power device 91 that can drive the main shaft 92 to rotate is fixed on the tank body 99, and the second power device 91 is a motor.

[0081] Furthermore, rotating grinding bodies 912 and fixed grinding bodies 95 are alternately arranged in the tank body 99 from top to bottom. The rotating grinding bodies 912 are fixedly connected to the main shaft 92, and the fixed grinding bodies 95 are fixedly connected to the tank body 99. A hollow bin 915 is formed in the center of the fixed grinding body 95, and the main shaft 92 passes through the hollow bin 915. A feeding blade 916 is fixed to the part of the main shaft 92 located in the hollow bin 915. The brown rice enters the tank body 99 through the rice inlet pipe 911, and flows downward along the gap between the rotating grinding body 912 and the fixed grinding body 95. At this time, the second power device 91 drives the main shaft 92 and the rotating grinding body 912 to rotate. During the rotation of the rotating grinding body 912, it cooperates with the fixed grinding body 95 to grind the brown rice in the gap, so that the brown rice grains and the gap, and the rice grains move relative to each other, and the brown rice generates mutual friction in the gap. When this friction penetrates into the inner part of the rice grain cortex, the rice skin slides relatively along the endosperm surface, and is stretched, broken, and finally rubbed off to form white rice.

[0082] Furthermore, the rotating grinding body 912 includes a stainless steel grinding body 9121 and a grinding body 9122 fixed to each other, and the fixed grinding body 95 includes an upper grinding body 951 and a lower grinding body 952 fixed to each other, and both the upper grinding body 951 and the lower grinding body 952 are made of corundum; a first grinding chamber 94 is formed between the stainless steel grinding body 9121 and the lower grinding body 952, and a second grinding chamber 96 is formed between the grinding body 9122 and the upper grinding body 951. When the stainless steel grinding body 9121 and the grinding body 9122 rotate, they cooperate with the fixed grinding body 95 made of corundum to grind and whiten the brown rice, with less pressure on the brown rice, thereby producing less broken rice.

[0083] Furthermore, a powder collecting bin 913 is formed inside the upper grinding body 951 and the lower grinding body 952, and a cylindrical screen 914 is fixed on one side of the powder collecting bin 913 close to the hollow bin 915; a collecting bin 98 is fixed on one side of the tank body 99, and a slag discharge port 97 is opened on the side wall of the tank body 99, and the slag discharge port 97 connects the collecting bin 98 and the powder collecting bin 913, and a dust discharge pipe 93 is connected to the bottom of the collecting bin 98, and the dust discharge pipe 93 is connected to the dust inlet of the gas filter 600. When the rice grains flow through each fixed grinding body 95, they will pass through the hollow bin 915. After entering the hollow bin 915, the outflow speed of the rice grains will be slowed down by the rotating feeding blades 916, and the rice grains can be prevented from flowing out in large quantities. At the same time, the dust generated by friction will pass through the cylindrical screen 914 and enter the powder collecting bin 913 when it falls into the hollow bin 915, so that the gray powder generated by friction is separated from the rice grains. The ash powder in the powder collecting bin 913 passes through the slag discharge port 97 and enters the collecting bin 98 for collection, and is finally introduced into the gas filter 600 through the dust outlet pipe 93 .

[0084] Furthermore, a fan may be installed in the cross section of the dust outlet duct 93 to generate negative pressure in the collection bin 98 , thereby driving the dust to float and preventing the dust from being deposited in the powder collection bin 913 or the collection bin 98 .

[0085] The outer wall surface of the grinding body 9122 is formed with a first curved surface 9123, and the outer wall surface of the upper grinding body 951 is formed with a second curved surface 9124. The first curved surface 9123 and the second curved surface 9124 are matched, so that the second grinding chamber 96 is in a continuously curved shape. The second grinding chamber 96 is designed to be in a continuously curved form, which can increase the flow time of the rice grains in the second grinding chamber 96 and increase the friction time; at the same time, when the rice grains flow in the curved second grinding chamber 96, the number of collision contacts with the grinding body 9122 and the upper grinding body 951 can be increased, and the repeated collision contacts improve the friction effect on the brown rice.

[0086] Working principle: The grains in the pit 100 are transported to the combined cleaning machine 200 by the dragon to screen out impurities. Then the grains are transported to the shelling machine 400 by the first hoist 300 for shelling.

[0087] The grains entering through the feed port flow naturally downward on the inner buckle cover 45, and flow into the lower clamping chamber 47 through a plurality of partition chambers 431. At this time, the compressed air generating device 500 works to generate high-pressure gas, which is transported to the jet disc 48 by the first gas pipeline 501 and sprayed out through the jet head. During the falling process, the grains are blown by the gas sprayed by the air spray assembly and act on the rotating rubber cylinder 410. The first power device 428 drives the rubber cylinder 410 to rotate through the transmission belt 429. During the rotation process, the rubber cylinder 410 collides with the grains in contact with it. At the same time, when the grains fall and collide, they will also be rebounded when they hit the shell 41, forming a process of repeated contact with the rubber cylinder 410, so as to form the shelling of the grains.

[0088] The hulled brown rice falls into the drop bin 411, and the separated rice husks rise under the blowing of wind and are introduced into the gas filter 600 through the first dust exhaust pipe 43; under the action of the vibrator 427, the annular screen 412 vibrates continuously or intermittently, so that the dust and rice husks in the brown rice are screened out through the annular screen 412 and fall into the inner collection bin 424, and are introduced into the gas filter 600 through the second dust exhaust pipe 421.

[0089] The first power device 428 drives the driving spindle 425 to rotate through the belt, and synchronously drives the column and the inner cylinder 49 to rotate when the driving spindle 425 rotates; when the inner cylinder 49 rotates, it drives the lifting blade 415 to rotate, and the brown rice in the feeding bin 411 is lifted upward inside the rubber cylinder 410, and the brown rice falls into the conical groove at the top of the inner cylinder 49, and slides down along the inclined surface of the conical groove into the upper central cavity 413. The second gas pipeline 502 blows the brown rice quickly into the opening 420, enters the spiral feeding blade 417, and flows downward in the spiral feeding cavity in an evenly spread shape. During the flow process, the dust impurities inside are screened out and fall into the inner central cavity 426 through the bottom screen 418, and fall into the inner collection bin 424 through the notch 423, and finally introduced into the gas filter 600 through the second dust exhaust pipe 421. After the brown rice is cooled and dusted, it can fall into the hollow cavity inside the driving main shaft 425 through the lower opening 419 and finally be exported to the dust separation device 700 for further dust separation.

[0090] The brown rice after dust separation in the dust separation device 700 is introduced into the roughing and impurity removal device 900 through the second elevator 800, and the second power device 91 drives the main shaft 92 and the rotating grinding body 912 to rotate, and the rotating grinding body 912 cooperates with the fixed grinding body 95 to grind the brown rice in the gap during the rotation process; the stainless steel grinding body 9121 and the grinding body 9122 cooperate with the fixed grinding body 95 made of diamond material to grind and whiten the brown rice when rotating;

[0091] When the rice grains flow through each fixed grinding body 95, they will pass through the hollow bin 915. After entering the hollow bin 915, the outflow speed of the rice grains will be slowed down by the rotating feeding blades 916, and the rice grains can be prevented from flowing out in large quantities. At the same time, when the dust generated by friction falls into the hollow bin 915, it will pass through the cylindrical screen 914 and enter the powder collection bin 913, so that the ash generated by friction is separated from the rice grains. The ash in the powder collection bin 913 passes through the slag discharge port 97 and enters the collection bin 98 for collection, and is finally introduced into the gas filter 600 through the dust discharge pipe 93.

[0092] When the rice grains flow in the first grinding chamber 94 and the curved second grinding chamber 96, especially when flowing in the curved second grinding chamber 96, the number of collision contacts with the grinding body 9122 and the upper grinding body 951 can be increased. The repeated collision contacts improve the friction effect on the brown rice, reduce the pressure on the brown rice, and produce less broken rice.

[0093] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rice husk grading and processing device, characterized in that: The device comprises a pit (100), a combined cleaning machine (200), a plurality of shelling machines (400), a gas filter (600), a dust separation device (700), a plurality of roughening and impurity removal devices (900) and a storage bin (1100); The discharge port of the pit (100) is connected to the feed port of the combined cleaning machine (200), the discharge port of the combined cleaning machine (200) is connected to the feed port of each shelling machine (400) through a plurality of first elevators (300), the discharge port of each shelling machine (400) is connected to the dust separation device (700), the dust outlet of each shelling machine (400) is connected to the dust inlet of the gas filter (600), the discharge port of the dust separation device (700) is connected to the feed port of each roughening and impurity removal device (900) through a plurality of second elevators (800), the discharge port of each roughening and impurity removal device (900) is connected to the feed port of the storage bin (1100) through a third elevator (1000), and the dust outlet of each roughening and impurity removal device (900) is connected to the dust inlet of the gas filter (600); The shelling machine (400) comprises: A base, a shell (41) being fixed on the base, and an upper cover (42) being fixed on the shell (41); A material distribution body, arranged in the inner cavity of the upper cover body (42); A shelling mechanism is arranged in the inner cavity of the shell (41), and the shelling mechanism comprises: A rubber cylinder (410) is rotatably connected to the bottom of the material distributing body, a material drop bin (411) is formed between the bottom of the rubber cylinder (410) and the base, and a lower clamping chamber (47) is formed between the outer side of the rubber cylinder (410) and the shell (41); An air spray assembly is fixed on the housing (41), the air spray assembly comprises an air spray disc (48), a plurality of air spray heads are fixed on the inner wall surface of the air spray disc (48), and the air spray heads are arranged in the lower clamping cavity (47); The device also includes: The inner cylinder (49) is arranged in the inner cavity of the rubber cylinder (410) and is rotatably connected to the base; a lifting blade (415) is fixed to the outer wall surface of the inner cylinder (49), and the bottom of the lifting blade (415) is located in the material drop bin (411); a column is formed inside the inner cylinder (49), and an inner central cavity (426) is formed between the column and the inner cylinder (49); a screening component is arranged around the circumference of the column, and the screening component receives the material after being lifted by the lifting blade (415); The driving mechanism comprises a first power device (428) and a driving spindle (425); the driving spindle (425) is hollow inside and fixedly connected to the column, and can discharge the material in the screening assembly; the output end of the first power device (428) is connected to the driving spindle (425) through a belt; the first power device (428) drives the rubber cylinder (410) to rotate through a transmission belt (429).

2. A rice husk grading processing device according to claim 1, characterized in that: The device also comprises a compressed air generating device (500), wherein the compressed air generating device (500) is provided with a first air delivery pipeline (501) and a second air delivery pipeline (502), wherein the first air delivery pipeline (501) is connected to the air spray assembly; and the second air delivery pipeline (502) passes through the upper cover body (42) and the material dividing body and is suspended on the column body, so as to blow the material lifted by the lifting blade (415) into the screening assembly.

3. The rice husk grading processing device according to claim 1, characterized in that: The column and the inner cylinder (49) are integrally formed, the top of the inner cylinder (49) is inclined downward from the edge to the center, and an upper central cavity (413) is formed at the top of the column, a support frame (416) is fixedly connected in the upper central cavity (413), and the second gas transmission pipeline (502) is rotatably connected to the support frame (416); An upper opening (420) is provided above the column, so that the material falling into the upper central cavity (413) can enter the screening assembly, and the gas outlet of the second gas pipeline (502) is bent and arranged toward the upper opening (420); A lower opening (419) is provided below the column, so that the material in the screening assembly can fall through the lower opening (419) into the hollow cavity inside the driving main shaft (425).

4. A rice husk grading processing device according to claim 1 or 3, characterized in that: The screening component comprises a spiral material discharge blade (417) surrounding a column, wherein the interior of the spiral material discharge blade (417) is hollow to form a spiral material discharge cavity, and the spiral material discharge cavity is respectively connected to an upper opening (420) and a lower opening (419); a bottom screen (418) is fixed to the bottom surface of the spiral material discharge blade (417).

5. The rice husk grading processing device according to claim 1, characterized in that: The base is provided with a notch (423) communicating with the inner central cavity (426); the base is separated by a partition (422) to form an inner collecting bin (424); the top of the shell (41) and the inner collecting bin (424) are respectively connected with a first dust exhaust pipe (43) and a second dust exhaust pipe (421); the first dust exhaust pipe (43) and the second dust exhaust pipe (421) are both connected with the dust inlet of the gas filter (600).

6. The rice husk grading processing device according to claim 1, characterized in that: The base is located at the part of the material drop bin (411) and is fixed with an annular screen (412), and a vibrator (427) is fixed at the bottom of the annular screen (412); A support seat (430) is arranged in the material drop bin (411), and the support seat (430) includes an upper ring (4301) and a lower ring (4302); the rubber cylinder (410) is rotatably connected to the bottom of the material distribution body and the upper ring (4301) through a rotating member (414), and the lower ring (4302) is fixed on the base; the upper ring (4301) and the lower ring (4302) are connected through a support column (4304), and a cavity (4303) is formed between two adjacent support columns (4304).

7. The rice husk grading processing device according to claim 1, characterized in that: The material dividing body comprises a conical inner buckle cover (45), an upper clamping cavity (46) is formed between the inner buckle cover (45) and the upper cover body (42), the upper clamping cavity (46) is connected with the lower clamping cavity (47), and a plurality of partition plates (44) are fixed on the inner buckle cover (45) to divide the upper clamping cavity (46) into a plurality of partition chambers (431).

8. The rice husk grading processing device according to claim 1, characterized in that: The roughening and impurity removing device (900) comprises a tank body (99), the top and bottom of the tank body (99) are respectively provided with a rice inlet pipe (911) and a rice outlet pipe (910), a main shaft (92) is arranged in the tank body (99), and a second power device (91) capable of driving the main shaft (92) to rotate is fixed on the tank body (99); Rotating grinding bodies (912) and fixed grinding bodies (95) are alternately arranged in the tank body (99) from top to bottom. The rotating grinding bodies (912) are fixedly connected to the main shaft (92), and the fixed grinding bodies (95) are fixedly connected to the tank body (99). The center of the fixed grinding body (95) is hollow to form a hollow chamber (915), the main shaft (92) passes through the hollow chamber (915), and a feeding blade (916) is fixed to the part of the main shaft (92) located in the hollow chamber (915); The rotating grinding body (912) includes a stainless steel grinding body (9121) and a grinding body (9122) fixedly connected to each other, and the fixed grinding body (95) includes an upper grinding body (951) and a lower grinding body (952) fixedly connected to each other. A first grinding cavity (94) is formed between the stainless steel grinding body (9121) and the lower grinding body (952), and a second grinding cavity (96) is formed between the grinding body (9122) and the upper grinding body (951).

9. The rice husk grading processing device according to claim 8, characterized in that: A powder collecting bin (913) is formed inside the upper grinding body (951) and the lower grinding body (952), and a cylindrical screen (914) is fixed on one side of the powder collecting bin (913) close to the hollow bin (915); A collecting bin (98) is fixed on one side of the tank body (99), a slag discharge port (97) is provided on the side wall of the tank body (99), the slag discharge port (97) is connected to the collecting bin (98) and the powder collecting bin (913), a dust discharge pipe (93) is connected to the bottom of the collecting bin (98), and the dust discharge pipe (93) is connected to the dust inlet of the gas filter (600).

10. The rice husk grading processing device according to claim 8, characterized in that: The outer wall surface of the grinding body (9122) is formed with a first curved surface (9123), and the outer wall surface of the upper grinding body (951) is formed with a second curved surface (9124). The first curved surface (9123) is matched with the second curved surface (9124), so that the second grinding chamber (96) is continuously curved.

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