Embryo grain separation device and method for rice processing

Abstract

The invention relates to the technical field of rice processing, in particular to an embryo grain separating device and method.The embryo grain separating device comprises a separating groove, a water pipe, a water storage tank, a water pump, an auxiliary separating module, a main separating module, a feeding port and a driving module, the auxiliary separating module comprises a right pipe shaft and a blade fan, and the main separating module comprises a left pipe shaft and a column fan; the left pipe shaft and the right pipe shaft are both fixed in the inner groove and are hollow, a left groove and a right groove are formed in the upper wall of the left pipe shaft and the upper wall of the right pipe shaft respectively, and the blade fan and the column fan are embedded in the right pipe shaft and the left pipe shaft respectively. According to the seed coat separating device, the mechanical system substitution principle is adopted, the mode of separating seed coats on the surfaces of embryo grains under the hydraulic action in the water circulation process of the separating tank is adopted, and the purposes of completely separating the embryo grains and avoiding damage to the embryo grains are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of rice processing, and specifically to a device and method for separating embryo grains used in rice processing. Background Art

[0002] After brown rice is processed by a rice milling machine, polished rice and processing by-products are obtained. The by-products contain chaff, seed coat, bran, and embryo grains, etc. Among them, the embryo grains have relatively high nutritional value, accounting for about 80% of the nutrition of a single rice grain, and can be used as raw materials for producing germ oil, which is supplied to fields such as food and cosmetics.

[0003] Therefore, during the rice processing process, attempts are made to separate the embryo grains from the rice processing by-products and recycle them. A common method is to use a separation tank: the processing by-products are discharged into the separation tank, and the embryo grains sink because their density is greater than that of the liquid in the separation tank, while other by-products have a smaller density and float on the liquid surface and are discharged from the separation tank along with the flow of the liquid surface. Through the above method, although the separation of the embryo grains can be completed, the purity of the collected embryo grains cannot be guaranteed because the germ (i.e., the form when the embryo grain has not fallen off) is located between the seed coat and the endosperm (i.e., polished rice), and there is a scutellum between the germ and the endosperm, and the connection is not tight. Therefore, the germ is easy to fall off from the endosperm. However, the binding force between the seed coat and the germ is relatively strong, so the seed coat will adhere to the surface of the embryo grain (i.e., the fallen germ).

[0004] In order to improve the purity of embryo grains in the prior art, attempts are often made to remove the seed coat on the embryo grains before the processing by-products enter the water. For example, a device for separating embryo grains used in rice processing with the publication number CN115254391A, before the processing by-products enter the water, the embryo grains are dispersed and lifted by a dispersion rod and a dispersion plate, so that the embryo grains vibrate, and then the seed coat on the surface of the embryo grains falls off, thereby improving the purity of the collected embryo grains.

[0005] Through the prior art, embryo grains with relatively high purity can be obtained, but there is still room for improvement in specific environments: in order to efficiently extract germ oil, embryo grains with relatively high oil content are often used, such as the embryo grains of indica rice. And because such embryo grains have a high oil content themselves, their shape is usually soft and glutinous. Therefore, when a dispersion device (such as the above-mentioned dispersion rod and dispersion plate) acts on the embryo grains, the surface of the embryo grains is easily damaged. After the embryo grains are damaged, the internal nutrients will be greatly lost, and the value will drop sharply. Moreover, due to the elasticity of the germ itself, it cannot vibrate effectively when affected by the dispersion device, and it is difficult to make the seed coat on the surface fall off. Therefore, there are still purity problems during separation.

[0006] Therefore, a device and method for separating embryo grains used in rice processing are proposed. Summary of the Invention

[0007] The object of the present invention is to provide a germ separation device and method for rice processing, which solves the problem that the germ separation device cannot ensure the surface purity of the germs with relatively high oil content. By means of the mechanical system substitution principle, the way of separating the seed coats on the surface of the germs by borrowing the hydraulic action during the water circulation in the separation tank realizes the complete separation of the germs and achieves the purpose of avoiding the breakage of the germs.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A germ separation device for rice processing includes a separation tank, a water pipe, a water storage tank, a water pump, an auxiliary separation module, a main separation module, a feed inlet and a drive module. The separation tank includes an inner tank and an outer tank. The feed inlet is installed above the inner tank. The main separation module is located below the feed inlet. The auxiliary separation module is located at the lower right of the main separation module. Multiple water pipes respectively connect the water storage tank with the main separation module, the water storage tank with the auxiliary separation module, and the water storage tank with the water pump. The drive module is arranged behind the outer wall of the inner tank;

[0010] The existing germ separation device rotates a turntable to strike the by-products of rice processing (including germs, seed coats, chaff and bran, etc.) so that the germs vibrate, thereby removing the substances on the germs. However, when separating the germs with relatively high oil content, the germs will slowly vibrate by virtue of their soft and glutinous shape, which will significantly reduce the separation effect of the germ separation device on the germs. Moreover, the striking of the separation device is likely to damage the surface of the germs with relatively high oil content, reducing the separation value of the germs. Therefore, the present invention intends to replace the existing separation method by other means. It can be known that there are many such replacement methods. For example, by means of wind power. Compared with this solution, although wind power can protect the germs while removing the impurities on the surface of the germs, the cleaning effect of wind power on the impurities is limited. Moreover, the quality of the rice by-products is relatively small. Using wind power for separation will cause the rice by-products to float in the air above the water surface of the separation tank for a long time, thus affecting the separation speed. In addition, the design of the wind power system requires additional equipment such as a blower to be installed, bringing additional production and procurement costs;

[0011] Preferably, the main separation module includes a left pipe shaft and a column fan, and the auxiliary separation module includes a right pipe shaft and a blade fan. The left pipe shaft and the right pipe shaft are both fixed in the inner tank. The left pipe shaft and the right pipe shaft are both hollow inside, and both the left pipe shaft and the right pipe shaft are designed with holes at the front end and closed at the rear end. The upper walls of the left pipe shaft and the right pipe shaft are respectively provided with a left groove and a right groove. The left groove and the right groove respectively communicate with the cavities inside the left pipe shaft and the right pipe shaft. Multiple sections of the water pipes respectively connect the front end of the left pipe shaft with the water storage tank and the front end of the right pipe shaft with the water storage tank. The column fan and the blade fan are driven by the drive module to rotate towards each other, and the column fan and the blade fan respectively periodically pass through the left groove and the right groove to communicate with the water storage tank. The germs falling from the feed inlet are separated from the surface impurities by the periodic water spraying action of the column fan and the blade fan;

[0012] Through the above solution, the water inside the water storage tank is introduced into the left pipe shaft and the right pipe shaft respectively, and the potential energy formed by the height difference between the water storage tank and the left pipe shaft and the right pipe shaft is used to pressurize and discharge the water inside the left pipe shaft and the right pipe shaft, so as to achieve the separation effect of the embryo grains. Further, according to the principle of periodic action, compared with continuous cleaning, periodic cleaning will have better effects, and thus the separation effect of the embryo grains will be better;

[0013] Preferably, the column fan includes a column body and hole columns. The column body and the blade fan are respectively nested on the left pipe shaft and the right pipe shaft, so that during the rotation of the blade fan of the column fan, it is periodically communicated with the left groove, so that the water inside the left pipe shaft is periodically ejected from the left through holes, and thus the periodic separation of the embryo grains is realized;

[0014] Preferably, a plurality of the hole columns are arranged in rows along the front-back direction on the circumferential surface of the column body, and multiple rows of the hole columns are circumferentially arrayed on the circumferential surface of the column body, and the inside of the hole columns is hollow. The hole columns are axially and circumferentially arrayed with left through holes. Through the design of the hole columns, the resistance during the rotation of the column fan is reduced, and the wind force carried by the column fan is also reduced, so as to avoid blowing away the by-products falling from the feed port; in addition, through this solution, the discharge rate of the by-products can also be increased, making the separation of the separation device more efficient.

[0015] It can be seen that there are various shapes of the hole columns, such as square columns. Further, for example, a rhombic column with its edges facing right. Compared with this solution, if the side of the square column in the above solution one faces forward, it will cause greater resistance during the rotation of the hole column. Although the solution two reduces the wind resistance during the rotation of the hole column through the design of the edges facing right, the protruding edges of the rhombus are likely to damage the surface of the embryo grains;

[0016] Preferably, the hole column is set as a cylindrical structure, which can not only effectively reduce the wind resistance, but also avoid damaging the embryo grains by means of its smooth outer surface. In the front view, the left through holes are only arranged in the windward area where the hole column rotates clockwise. Too many left through holes will significantly reduce the discharge water pressure, which is not conducive to the separation of the embryo grains.

[0017] Preferably, a single row of the hole columns is spirally arranged on the circumferential surface of the column body, and the spiral angle value of the single row of hole columns is greater than the angle value of the corresponding central angle of the left groove, so as to improve the water spraying pressure of the hole columns while making the rotation of the column fan more stable.

[0018] It can be seen that there are various arrangement methods for the feed port and the left pipe shaft. For example, the central axis of the left pipe shaft is arranged on the right side of the left-right symmetry plane of the feed port. Compared with this solution, when separating the embryo grains in the above solution, the embryo grains will fall above the hole columns and will collide violently with the rotating hole columns under their own gravity, making their surfaces easily damaged;

[0019] Preferably, the left groove includes a water inlet section and a water outlet section. The water inlet section and the water outlet section are respectively the areas between the left vertical plane passing through the central axis of the left tube and the left wall and the right wall of the left groove. Moreover, the angles of the corresponding central angles of the water inlet section and the water outlet section increase step by step, thereby shortening the overall length of the left groove to ensure sufficient water pressure. The feed inlet is in the shape of a duck's bill, with the upper part being round and the lower part being square, which not only facilitates feeding but also makes the by-products form a thin layer during discharging, facilitating the separation of the germ grains by the water ejected from the hole columns. The central axis of the left tube is located on the left side of the left-right symmetry plane of the feed inlet, thereby avoiding the collision between the by-products and the hole columns and protecting the surface of the germ grains.

[0020] Only the column fan is used to separate the germ, and there is still room for improvement in the separation effect: the design of the hole column weakens the carried wind force to a certain extent, but it cannot be avoided. Therefore, when the column fan rotates, it will still cause a weak air flow, which will blow the falling by-products to the right, weakening the separation effect of the hole column on the germ grains.

[0021] Preferably, the blade fan includes a blade body and hole blades. The blade body is nested on the right tube axis, and a plurality of the hole blades are arranged in a circumferential array on the circumferential surface of the blade body. The inside of the hole blade is hollow, and a right through hole is provided on the windward surface where the hole blade rotates counterclockwise in the front view.

[0022] Through the above solution, on the one hand, the action time of the hole column on the by-products is longer, thereby strengthening the separation effect on the germ grains. On the other hand, the germ grains with poor separation effect are separated for the second time.

[0023] Preferably, the outer groove is arranged on the right side of the inner groove. An outflow groove is opened on the right wall of the inner groove. The lowest point of the rotation trajectory of the hole blade is below the lower wall of the outflow groove, so that the hole blade can stir the water surface to accelerate the discharge of the by-products from the outflow groove, thereby improving the separation rate of the separation device. Since the hole blade rotates counterclockwise, the outer groove is arranged on the right side of the inner groove, and the outflow groove is opened on the right wall of the inner groove.

[0024] Preferably, both the left through hole and the right through hole are set as tapered hole structures, and the small-diameter ends of the left through hole and the right through hole face outward, thereby not only improving the separation effect on the germ grains but also reducing the energy consumption of the separation device.

[0025] Preferably, the driving module includes a motor, a driving roller, a driven roller, a tensioning roller and a conveyor belt. The output shaft of the motor is connected to the rear end of the column body. The driving roller is nested on the column body, and the driven roller is nested on the blade body. By selecting the diameters of the driving roller and the driven roller, the speed ratio of the column fan to the blade fan can be adjusted, and then the airflow effect between the column fan and the blade fan can be adjusted, so as to better separate the embryo grains. The two tensioning rollers are installed behind the outer wall of the inner groove, and the two tensioning rollers are respectively located above and below the driven roller. The conveyor belt winds around the driving roller, the driven roller and the tensioning roller. The driving roller and the driven roller are respectively in contact with the inner ring surface and the outer ring surface of the conveyor belt, so that the column fan and the blade fan rotate towards each other under the drive of the driving roller and the driven roller.

[0026] A method applicable to the above-mentioned embryo grain separation device for rice processing is as follows:

[0027] S1. Start the water pump and the motor; while the water pump pumps the water in the outer groove into the water storage tank, the motor drives the column fan and the blade fan to rotate, so as to spray the water in the water storage tank out through the left through hole and the right through hole;

[0028] S2. Feed materials; feed the rice processing by-products into the feed inlet. When the by-products are discharged from the feed inlet, they are affected by the water sprayed from the left through hole and the right through hole, so that the seed coat on the surface of the embryo grains falls off;

[0029] S3. Collect the by-products in the outer groove; after the by-products other than the embryo grains are cleaned by the water sprayed by the column fan and the blade fan, they fall and float on the water surface of the inner groove. While the blade fan rotates, it stirs the water surface to accelerate the flow of the above-mentioned by-products along with the water surface from the outflow groove to the outer groove, and then collect the by-products filtered out by the outer groove;

[0030] S4. Collect the embryo grains in the inner groove; when the embryo grains in the inner groove accumulate to a set amount, drain the water in the inner groove into the outer groove, and then collect the embryo grains in the inner groove.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] 1. Through the connection of the left pipe shaft, the right pipe shaft and the water storage tank, and by means of the original water circulation system of the separation device, the present invention exerts a hydraulic action on the embryo grains to replace the original mechanical collision to separate the seed coat on the surface of the embryo grains. This not only enhances the effect of seed coat shedding, thereby improving the purity of the embryo grains, but also avoids the damage to the surface of the embryo grains caused by mechanical collision.

[0033] 2. Through the rotation of the column fan and the blade fan on the left pipe shaft and the right pipe shaft respectively, the water in the left pipe shaft and the right pipe shaft is uniformly and periodically discharged through the porous structures on the column fan and the blade fan, so as to further improve the separation effect on the embryo grains. While improving the purity of the embryo grains, the discharged water mist adheres to the rice by-products with small mass to accelerate the falling of the by-products, thereby improving the separation and collection rate of the separation device for the by-products.

[0034] 3. The present invention drives more airflows through the large-area structure of the leaf fan to offset the airflows caused by the rotation of the column fan, thereby strengthening the separation effect of the column fan on the embryo grains. Meanwhile, the leaf fan is used to perform secondary separation on the embryo grains with poor separation effect to improve the purity of the embryo grains. At the same time, the water surface in the inner tank is stirred by the leaf fan to accelerate the discharge of by-products, so as to further improve the separation and collection rate of the by-products by the separation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is an overall isometric structural schematic diagram of the present invention;

[0036] Figure 2 is an overall isometric sectional structural schematic diagram of the present invention;

[0037] Figure 3 of the present invention Figure 2 is an enlarged schematic diagram of part A;

[0038] Figure 4 of the present invention Figure 2 is an enlarged schematic diagram of part B;

[0039] Figure 5 is an overall front view structural schematic diagram of the present invention;

[0040] Figure 6 of the present invention Figure 5 is an enlarged schematic diagram of part C;

[0041] Figure 7 of the present invention Figure 5 is an enlarged schematic diagram of part D;

[0042] Figure 8 is a structural schematic diagram of the drive module of the present invention.

[0043] In the figure: 1. Separation tank; 11. Inner tank; 111. Outflow tank; 12. Outer tank; 2. Water pipe; 3. Water storage tank; 4. Water pump; 5. Auxiliary separation module; 51. Right pipe shaft; 511. Right tank; 52. Leaf fan; 521. Leaf body; 522. Hole leaf; 5221. Right through hole; 6. Main separation module; 61. Left pipe shaft; 611. Left tank; 6111. Inlet section; 6112. Outlet section; 62. Column fan; 621. Column body; 622. Hole column; 6221. Left through hole; 7. Feed inlet; 8. Drive module; 81. Motor; 82. Driving roller; 83. Driven roller; 84. Tensioning roller; 85. Conveyor belt. DETAILED DESCRIPTION OF THE INVENTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] Please refer to Figures 1 to 8 , the present invention provides a germ separation device and method for rice processing, and the technical solutions are as follows:

[0046] Refer to Figure 1 and Figure 5, A germ separation device for rice processing, comprising a separation tank 1, a water pipe 2, a water storage tank 3, a water pump 4, an auxiliary separation module 5, a main separation module 6, a feed inlet 7 and a drive module 8. The separation tank 1 includes an inner tank 11 and an outer tank 12. The outer tank 12 is arranged on the right side of the inner tank 11. An outflow groove 111 is provided on the right wall of the inner tank 11. The lowest point of the rotation trajectory of the orifice blade 522 is below the lower wall of the outflow groove 111, so that the orifice blade 522 stirs the water surface to accelerate the discharge of by-products from the outflow groove 111, thereby improving the separation rate of the separation device. Since the orifice blade 522 rotates counterclockwise, the outer tank 12 is arranged on the right side of the inner tank 11, and the outflow groove 111 is provided on the right wall of the inner tank 11. The water storage tank 3 is located above the inner tank 11. The water storage tank 3 does not necessarily have to be connected to the separation tank 1. The higher its arrangement position, correspondingly, the greater the potential energy between it and the main separation module 6 and the auxiliary separation module 5, and the greater the pressure of the water ejected from the main separation module 6 and the auxiliary separation module 5, and the better the separation effect on the germ. Therefore, the position of the water storage tank 3 can be arranged higher, but it should also be noted that too high water pressure will also damage the surface of the germ. Therefore, the position of the water storage tank 3 is not the higher the better. The water pressure can be stabilized at a suitable value by adjusting the height of the water storage tank 3. Further, to avoid the trouble of adjusting the height of the water storage tank 3 multiple times, a pressure regulating valve can be installed on the water pipe 2 between the water storage tank 3 and the main separation module 6 and the auxiliary separation module 5 to adjust the water pressure by means of simple adjustment of the pressure regulating valve. The water pump 4 is installed behind the outer tank 12. The inside of the water pump 4 is communicated with the outer tank 12 to pump the water in the outer tank 12 and send the water to the inside of the water storage tank 3 through the water pipe 2 connected to the water storage tank 3 for the water circulation of the separation device. The feed inlet 7 is installed above the inner tank 11. Since the length of the square at the lower part of the feed inlet 7 is greater than the diameter of the circle at the upper part, for the convenience of installing the feed inlet 7 on the separation tank 1, a round hole with a diameter larger than the length of the square at the lower part of the feed inlet 7 is provided on the upper wall of the separation tank 1, and a flange with a diameter larger than the diameter of the above-mentioned round hole is provided at the upper part of the feed inlet 7, so that the lower part of the feed inlet 7 can be inserted from the round hole and connected by means of the flange. The main separation module 6 is located below the feed inlet 7, and the auxiliary separation module 5 is located at the lower right of the main separation module 6. Multiple water pipes 2 are respectively communicated with the water storage tank 3 and the main separation module 6, the water storage tank 3 and the auxiliary separation module 5, and the water storage tank 3 and the water pump 4. The drive module 8 is arranged behind the outer wall of the inner tank 11.

[0047] As an implementation manner of the present invention, referring to Figures 2 to 4, the main separation module 6 includes a left tube shaft 61 and a column fan 62, and the auxiliary separation module 5 includes a right tube shaft 51 and a blade fan 52. The left tube shaft 61 and the right tube shaft 51 are both fixed in the inner groove 11. The left tube shaft 61 and the right tube shaft 51 are both hollow inside, and both the left tube shaft 61 and the right tube shaft 51 are designed with a structure having a hole at the front end and a closed rear end. The upper walls of the left tube shaft 61 and the right tube shaft 51 are respectively provided with a left groove 611 and a right groove 511. The left groove 611 and the right groove 511 respectively communicate with the cavities inside the left tube shaft 61 and the right tube shaft 51. Multiple sections of water pipes 2 are respectively connected to the front end of the left tube shaft 61 with the water storage tank and the front end of the right tube shaft 51 with the water storage tank. The column fan 62 and the blade fan 52 are driven by the driving module 8 to rotate towards each other, and the column fan 62 and the blade fan 52 respectively pass through the left groove 611 and the right groove 511 periodically to communicate with the water storage tank 3. The germ grains falling from the feed port 7 are separated from the impurities on the surface by the periodic water spraying action of the column fan 62 and the blade fan 52. The column fan 62 includes a column body 621 and a hole column 622. The column body 621 and the fan body are respectively nested on the left tube shaft 61 and the right tube shaft 51. The column body 621 and the fan body are respectively rotatably connected on the left tube shaft 61 and the right tube shaft 51. By means of the water inside the left tube shaft 61 and the right tube shaft 51, there is no need to arrange bearings between the column body 621 and the left tube shaft 61 and between the fan body and the right tube shaft 51. After blocking the rear ends of the column body 621 and the fan body, only the front ends of the connections between the column body 621 and the left tube shaft 61 and between the fan body and the right tube shaft 51 need to be rotationally sealed, such as using a sealing ring. On the rear wall of the inner groove 11, the column body 621 and the inner groove 11 and the fan body and the inner groove 11 are rotatably connected using bearings. Multiple hole columns 622 are arranged in rows along the front-rear direction on the circumferential surface of the column body 621. Multiple rows of hole columns 622 are circumferentially arrayed on the circumferential surface of the column body 621, and the inside of the hole column 622 is hollow. The hole column 622 is axially and circumferentially arrayed with left through holes 6221 along its own axis;

[0048] According to the principle of periodic motion, compared with continuous water spraying at a fixed position (similar to a shower head), periodic water spraying will have an intermittent and continuous strong pressure effect, thereby achieving the effect of mechanical collision to vibrate the germ grains, so that the sprayed water flow can not only carry away the seed coat on the surface of the germ grains through its own impact, but also shake off the seed coat through high-frequency vibration;

[0049] In addition, in the existing separation device, the water in the water storage tank 3 is generally discharged at a fixed position in the separation tank 1. However, in this solution, the water in the water storage tank 3 is discharged into the separation tank 1 through the hole column 622 and the blade fan 52. This not only realizes the separation of the germ grains, but also makes the water in the water storage tank 3 evenly scatter in the separation tank 1, moistens the air in the water storage tank 3, makes the water droplets adhere to the by-products with smaller mass, so as to accelerate the falling of the by-products, thereby improving the discharge rate of the by-products and making the separation of the separation device more efficient.

[0050] As an implementation manner of the present invention, referring to Figure 2 and Figure 6, the hole column 622 is set as a cylindrical structure. In the front view, the left through-hole 6221 is only arranged in the windward area where the hole column 622 rotates clockwise. The single row of hole columns 622 is spiral on the circumferential surface of the column body 621, and the spiral angle value of the single row of hole columns 622 is greater than the angle value of the corresponding central angle of the left groove 611;

[0051] During the rotation of the column fan 62, on the one hand, one row of hole columns 622 is successively connected and disconnected with the left groove 611 from front to back, thereby reducing the number of hole columns 622 in contact with the left groove 611 at the same time, so as to achieve the effect of increasing the water pressure; on the other hand, the instantaneous water output and instantaneous water input of the column fan 62 are correspondingly reduced, thereby improving the dynamic balance during the rotation of the column fan 62. During production and manufacturing, the casting method can be used to integrally cast out a row of spiral hole columns 622, and then the cast hole columns 622 are welded to the column body 621. The internal cavity of the hole column 622 can adopt split mold casting. When demolding, first take out the mold on the side without the left through-hole 6221, and then take out the mold on the side with the left through-hole 6221.

[0052] As an embodiment of the present invention, referring to Figure 5 and Figure 6 , the left groove 611 includes a water inlet section 6111 and a water outlet section 6112. The water inlet section 6111 and the water outlet section 6112 are respectively the areas between the left wall and the right wall of the left groove 611 and the vertical plane passing through the central axis of the left pipe shaft 61. Moreover, the angle values of the corresponding central angles of the water inlet section 6111 and the water outlet section 6112 gradually increase. The feed port 7 is in the shape of a duck's bill, and the upper part of the feed port 7 is circular and the lower part is square. The central axis of the left pipe shaft 61 is located on the left side of the left-right symmetry plane of the feed port 7;

[0053] During the rotation of the hole column 622, water intake is completed through the water inlet section 6111, and sufficient water pressure is reached when it is in the vertical state to separate the by-products vertically falling from the right through the feed port 7. The water sprayed to the right will give the by-products the power to move to the right, thereby avoiding the collision between the by-products and the hole column 622 and playing a role in protecting the surface of the embryo grains.

[0054] As an embodiment of the present invention, referring to Figure 7 , the blade fan 52 includes a blade body 521 and hole blades 522. The blade body 521 is nested on the right pipe shaft 51. A plurality of hole blades 522 are circumferentially arrayed on the circumferential surface of the blade body 521. The inside of the hole blades 522 is hollow, and a right through-hole 5221 is provided on the windward surface where the hole blades 522 rotate counterclockwise in the front view;

[0055] The airflow formed by the rotation of the blade fan 52 can offset the airflow caused by the column fan 62. Further, the airflow formed by the rotation of the blade fan 52 should be able to completely offset the airflow caused by the column fan 62. Therefore, the orifice blade 522 is designed as an integral sector shape, rather than multiple individuals like the multiple orifice columns 622, to increase the airflow caused by the blade fan 52. When the airflow caused by the blade fan 52 is greater than the airflow caused by the column fan 62, when the by-products fall from the feed port 7, they will tend to the left side, and then the action time of the orifice column 622 on the by-products will be longer, thus achieving a better separation effect on the embryo grains. In addition, due to the different opening positions of the left through holes 6221 on the orifice column 622, the effects on the embryo grains in the by-products are also different. The water flow directly shooting to the right will accelerate the rightward movement of the embryo grains, and then make the embryo grains break away from the water flow faster, resulting in a worse separation effect of the embryo grains. Therefore, through the arrangement of the blade fan 52, the embryo grains moving farther to the right (i.e., with a worse separation effect) are separated twice.

[0056] As an embodiment of the present invention, referring to Figure 6 and Figure 7 , both the left through hole 6221 and the right through hole 5221 are set as conical hole structures, and the small-diameter ends of the left through hole 6221 and the right through hole 5221 face outward. This not only increases the pressure when water discharges from the left through hole 6221 and the right through hole 5221, thereby improving the separation effect on the embryo grains, but also reduces the amount of airflow pouring into the inside of the orifice column 622 or the orifice blade 522 through the small-area contact with the outside, thereby reducing the wind resistance and thus reducing the energy consumption of the separation device.

[0057] As an embodiment of the present invention, referring to Figure 8 , the drive module 8 includes a motor 81, a driving roller 82, a driven roller 83, a tensioning roller 84, and a conveyor belt 85. The output shaft of the motor 81 is connected to the rear end of the column body 621. The driving roller 82 is nested on the column body 621, and the driven roller 83 is nested on the blade body 521. Two tensioning rollers 84 are installed behind the outer wall of the inner groove 11, and the two tensioning rollers 84 are respectively located above and below the driven roller 83. The conveyor belt 85 is wound around the driving roller 82, the driven roller 83, and the tensioning roller 84. The driving roller 82 and the driven roller 83 are respectively in contact with the inner ring surface and the outer ring surface of the conveyor belt 85. The conveyor belt 85 can be selected as a double-sided synchronous belt. Correspondingly, the driving roller 82, the driven roller 83, and the tensioning roller 84 should also use synchronous belt rollers to improve the working stability of the separation device.

[0058] Working principle: The present invention utilizes the original water circulation system of the separation device, enabling the water inside the water storage tank 3 to be discharged from the blade fan 52 and the column fan 62 respectively. By using hydraulic cleaning instead of mechanical collision, while better separating the embryo grains from the seed coats, the damage to the surface of the embryo grains can be avoided. Additionally, to enhance the effect of hydraulic cleaning, through the rotational connection of the blade fan 52 with the right pipe shaft 51 and the column fan 62 with the left pipe shaft 61, and the corresponding structural design thereof, the water is periodically discharged from the blade fan 52 and the column fan 62, so as to achieve the purpose of multiple spraying to better remove the seed coats on the surface of the embryo grains;

[0059] Specifically, start the water pump 4 and the motor 81; while the water pump 4 pumps the water in the outer tank 12 into the water storage tank 3, the motor 81 drives the column fan 62 and the blade fan 52 to rotate towards each other. The column fan 62 and the blade fan 52 are respectively provided with hole columns 622 and hole blades 522. The upper parts of the left pipe shaft 61 and the right pipe shaft 51 are respectively provided with left grooves 611 and right grooves 511. When the hole columns 622 and the hole blades 522 respectively pass through the left groove 611 and the right groove 511, the water inside the left pipe shaft 61 and the right pipe shaft 51 will be respectively sprayed out through the hole columns 622 and the hole blades 522. Since the hole columns 622 and the hole blades 522 are circumferentially arrayed on the circumferences of the column body 621 and the blade body 521 respectively, a plurality of hole columns 622 and blade holes 522 will respectively pass through the left groove 611 and the right groove 511 periodically under the drive of the motor 81, so as to achieve the effect of periodic water spraying to separate the embryo grains. The column fan 62 is the core component of the main separation module 6. To enhance its effect on separating the embryo grains, it is desired to increase the water spraying pressure: in the front-rear direction, the hole columns 622 are spirally arranged on the circumference of the left pipe shaft 61, so that the hole columns 622 arranged in a row pass through the left groove 611 successively and complete the water spraying action one by one, thereby ensuring that each hole column 622 has sufficient pressure when spraying water, so as to achieve a better separation effect on the embryo grains;

[0060] The hole columns 622 are designed as multiple, rather than being integrally designed like the hole blades 522, in order to avoid the phenomenon that when the hole columns 622 rotate, the carried air volume is too large, so as to blow the rice by-products falling from the feed inlet 7 to the right, thereby reducing the separation effect of the embryo grains in the by-products. To further improve the separation effect of the embryo grains, it is desired that the rice by-products float to the left when falling from the feed inlet 7, so as to contact the column fan 62 for a longer time, and then the column fan 62 can clean the embryo grains for a longer time. Therefore, the blade fan 52 is arranged below the right of the column fan 62, and the blade fan 52 is arranged as an integral structure. By means of the air volume driven by the rotation of the large-area blade fan 52, the air volume carried by the hole columns 622 is offset, and the by-products are given the power to move to the left. Additionally, the blade fan 52 can also perform secondary separation on the embryo grains with poor separation effect by the column fan 62, so as to further improve the separation effect of the embryo grains;

[0061] Feeding; feeding the rice processing by-products into the feed inlet 7, and when the by-products are discharged from the feed inlet 7, they are affected by the water spraying of the left through hole 6221 and the right through hole 5221, so that the seed coat on the surface of the embryo grains falls off;

[0062] Collecting the by-products in the outer tank 12; after the by-products other than the embryo grains are cleaned by the water spraying of the column fan 62 and the blade fan 52, they fall and float on the water surface of the inner tank 11. While the blade fan 52 rotates, it stirs the water surface to accelerate the flow of the above-mentioned by-products along with the water surface from the outflow tank 111 to the outer tank 12, and then collects the by-products filtered out by the outer tank 12;

[0063] Collecting the embryo grains in the inner tank 11; when the embryo grains in the inner tank 11 accumulate to a set amount, the water in the inner tank 11 is drained into the outer tank 12, and then the embryo grains in the inner tank 11 are collected.

[0064] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A germ separation device for rice processing, comprising a separation tank (1), a water pipe (2), a water storage tank (3) and a water pump (4), wherein the separation tank (1) includes an inner tank (11) and an outer tank (12), and is characterized in that: It further includes an auxiliary separation module (5), a main separation module (6), a feed inlet (7), and a drive module (8). The auxiliary separation module (5) includes a right tube shaft (51) and a blade fan (52). The main separation module (6) includes a left tube shaft (61) and a column fan (62). Both the left tube shaft (61) and the right tube shaft (51) are fixed in the inner groove (11). Both the left tube shaft (61) and the right tube shaft (51) are hollow inside. Upper walls of the left tube shaft (61) and the right tube shaft (51) are respectively provided with a left groove (611) and a right groove (511). The blade fan (52) and the column fan (62) are respectively nested on the right tube shaft (51) and the left tube shaft (61). Multiple water pipes (2) respectively connect the water storage tank (3) with the front end of the left tube shaft (61), the water storage tank (3) with the front end of the right tube shaft (51), and the water storage tank (3) with the water pump (4). The feed inlet (7) is connected above the inner groove (11). The drive module (8) is arranged behind the outer wall of the inner groove (11); The column fan (62) and the blade fan (52) are driven by the drive module (8) to rotate towards each other, and the column fan (62) and the blade fan (52) respectively pass through the left groove (611) and the right groove (511) periodically to communicate with the water storage tank (3). The germ grains falling from the feed inlet (7) are separated from the surface impurities by the periodic water spraying action of the column fan (62) and the blade fan (52).

2. The embryo grain separation device for rice processing according to claim 1, characterized in that: The column fan (62) includes a column body (621) and a hole column (622). The blade fan (52) includes a blade body (521) and a hole blade (522). The column body (621) and the blade body (521) are respectively nested on the left tube shaft (61) and the right tube shaft (51). Multiple hole columns (622) are arranged in rows along the front-back direction on the circumferential surface of the column body (621). Multiple rows of hole columns (622) are circumferentially arrayed on the circumferential surface of the column body (621). The inside of the hole column (622) is hollow. The hole column (622) is axially and circumferentially arrayed with left through holes (6221).

3. The embryo grain separation device for rice processing according to claim 2, wherein: The hole column (622) is set as a cylindrical structure. In the front view, the left through holes (6221) are only arranged in the windward area where the hole column (622) rotates clockwise.

4. A germ separation device for rice processing according to claim 3, characterized in that: A single row of hole columns (622) is in a spiral shape on the circumferential surface of the column body (621), and the spiral angle value of the single row of hole columns (622) is greater than the angle value of the central angle corresponding to the left groove (611).

5. A germ separation device for rice processing according to claim 4, characterized in that: The left groove (611) includes a water inlet section (6111) and a water outlet section (6112). The water inlet section (6111) and the water outlet section (6112) are respectively the areas between the left wall and the right wall of the left groove (611) and the vertical plane passing through the central axis of the left tube shaft (61). The angle values of the central angles corresponding to the water inlet section (6111) and the water outlet section (6112) increase step by step. The feed inlet (7) is in a duckbill shape, with the upper part being round and the lower part being square. The central axis of the left tube shaft (61) is located on the left side of the left-right symmetry plane of the feed inlet (7).

6. The embryo grain separation device for rice processing according to claim 2, wherein: A plurality of the orifice vanes (522) are arranged in a circumferential array on the circumferential surface of the vane body (521). The interior of the orifice vane (522) is hollow, and a right through-hole (5221) is provided on the windward surface where the orifice vane (522) rotates counterclockwise in a front view.

7. The embryo grain separation device for rice processing according to claim 6, characterized in that: The outer groove (12) is arranged on the right side of the inner groove (11). An outflow groove (111) is formed in the right wall of the inner groove (11). The lowest point of the rotation trajectory of the orifice vane (522) is below the lower wall of the outflow groove (111).

8. A germ separation device for rice processing according to claim 6, characterized in that: Both the left through-hole (6221) and the right through-hole (5221) are configured as tapered hole structures, and the small-diameter ends of the left through-hole (6221) and the right through-hole (5221) face outward.

9. The embryo grain separation device for rice processing according to claim 6, characterized in that: The driving module (8) includes a motor (81), a driving roller (82), a driven roller (83), a tensioning roller (84), and a conveyor belt (85). The output shaft of the motor (81) is connected to the rear end of the column body (621). The driving roller (82) is nested on the column body (621). The driven roller (83) is nested on the vane body (521). Two tensioning rollers (84) are installed behind the outer wall of the inner groove (11), and the two tensioning rollers (84) are respectively located above and below the driven roller (83). The conveyor belt (85) is wound around the driving roller (82), the driven roller (83), and the tensioning roller (84). The driving roller (82) and the driven roller (83) are respectively in contact with the inner ring surface and the outer ring surface of the conveyor belt (85).

10. A method, applicable to the embryo grain separation device for rice processing according to any one of claims 1 to 9, characterized in that: S1. Start the water pump (4) and the motor (81); while the water pump (4) pumps the water in the outer groove (12) into the water storage tank (3), the motor (81) drives the column fan (62) and the vane fan (52) to rotate, so as to spray the water in the water storage tank (3) through the left through-hole (6221) and the right through-hole (5221); S2. Feed materials; feed the rice processing by-products into the feed inlet (7). When the by-products are discharged from the feed inlet (7), the seed coats on the surfaces of the embryo grains are removed under the action of the water sprayed from the left through-hole (6221) and the right through-hole (5221); S3. Collect the by-products in the outer groove (12); the by-products other than the embryo grains fall and float on the water surface of the inner groove (11) after being cleaned by the water sprayed by the column fan (62) and the vane fan (52). While the vane fan (52) rotates, it stirs the water surface to accelerate the flow of the above-mentioned by-products along with the water surface from the outflow groove (111) to the outer groove (12), and then collect the by-products filtered by the outer groove (12); S4. Collect the embryo grains in the inner groove (11); when the embryo grains in the inner groove (11) accumulate to a set amount, drain the water in the inner groove (11) into the outer groove (12), and then collect the embryo grains in the inner groove (11).

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