Rice hull grain extractor for grain processing

Abstract

The utility model discloses a rice husk grain extractor for grain processing, which relates to the technical field of grain processing equipment and comprises a shell, a feed hopper connected onto the shell and a rice husk feed auger rotationally connected into the shell, a multi-stage separation component used for separating rice husks from inferior grains is arranged below the rice husk feed auger, and the rice husk and inferior grains are separated by the multi-stage separation component. The multi-stage separation assembly comprises a first shedding plate which is rotationally connected into the shell and used for loosening rice husks for the first time, and a second shedding plate is rotationally connected into the shell and located below the first shedding plate; after rice husks enter equipment through the feeding hopper, the rice husk feeding auger is matched with the frequency converter, the rotating speed can be flexibly adjusted according to actual requirements, and the rice husks are evenly distributed. By means of the design, the problem that a feeding layer is not uniform is effectively avoided, unstable air speed caused by non-uniform feeding is avoided, and then the phenomenon that inferior grains are lost or entrained is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of grain processing equipment, specifically a rice husk lifting device for grain processing. Background Technology

[0002] Rice husk extractors are mainly used in conjunction with the secondary processing industry of rice husks to extract plump grains, broken rice, imperfect grains, and shriveled grains from rice husk mixtures. The rice husk extractor primarily utilizes the principle of air separation, separating the heavier rice, shriveled grains, and imperfect grains from the rice husks based on their different specific gravities for separate collection. Currently, rice husk extractor devices adjust the airflow by using flow baffles installed inside the rice husk channel, ensuring sufficient airflow to extract rice husk impurities without hindering the rice's descent into the discharge channel, thus quickly separating rice husks and other impurities from the rice.

[0003] A Chinese patent (publication number: CN217797382U) discloses a gravity-type vertical rice husk lifting device, which includes a shell. An air outlet is located on the left side of the top of the shell, a feed inlet is located on the right side of the top of the shell, and a discharge outlet is located at the bottom of the shell. A baffle is fixed to the right side of the top of the interior of the shell, and a first and second flow plates are located at the bottom of the interior of the shell. A first supplementary air inlet is located in the middle of the top of the shell, a second supplementary air inlet is located at the top of the right side of the shell, and a third supplementary air inlet is located at the bottom of the left side of the shell. This invention, through the adjustable baffle and flow plates, utilizes the difference in material specific gravity and inertia. Under the action of airflow, the material is lifted more effectively in a weightless state, allowing lighter impurities to be drawn upwards by the airflow, while heavier grains fall from the discharge outlet and are collected.

[0004] However, the above-mentioned equipment has certain problems in use. First, the equipment introduces raw materials through the feed inlet, but no material equalization component is set after the raw materials. Therefore, the rice husk feed layer may be uneven during the feeding process. If the feed layer is thin, the resistance in that area is small, and the wind can easily pass through the area with low resistance, resulting in uneven wind speed. Areas with high wind speed will lose inferior grains (full grains, broken rice, imperfect grains, shriveled grains, and grass seeds, etc.). If the rice husk feed layer is too thick, the wind will suck away the rice husks and carry away some inferior grains. Utility Model Content

[0005] The purpose of this utility model is to provide a rice husk lifting device for grain processing, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides a rice husk grain lifting device for grain processing, including a shell and a feeding hopper connected to the shell, including a rice husk feeding auger rotatably connected inside the shell, and a multi-stage separation component for separating rice husks from secondary grains is provided below the rice husk feeding auger.

[0007] The multi-stage separation component includes a first flow plate rotatably connected inside the housing for initial loosening of rice husks, and a second flow plate rotatably connected inside the housing and located below the first flow plate for secondary loosening of rice husks. Both the first and second flow plates have multiple sieve holes arranged in a rectangular array.

[0008] Furthermore, the shell is provided with a primary air duct body for initial separation of rice husks and secondary grains, and is located above the first flow plate. Above the second flow plate, a secondary air duct body for secondary separation of rice husks and secondary grains is provided. A chute is connected inside the shell and is located between the first and second flow plates to guide rice husks and secondary grains that have not been sucked away by the primary air duct body.

[0009] Furthermore, the shell is provided with a secondary grain hopper and a rice husk settling chamber, wherein the secondary grain hopper is located below the second flow plate, and the feed end of the rice husk settling chamber is located below the discharge end of the primary air duct body and the secondary air duct body. A secondary grain auger is rotatably connected inside the secondary grain hopper, and a rice husk discharge component is rotatably connected inside the rice husk settling chamber.

[0010] Furthermore, a fan is provided on one side of the housing, the exhaust end of the fan is connected to a conveying pipe, the other end of the conveying pipe is connected to the housing, and a pulse dust collector is connected inside the housing, the pulse dust collector being interconnected with the conveying pipe.

[0011] Furthermore, the rice husk discharge component includes a discharge cylinder connected inside the housing, a rice husk discharge auger rotatably connected inside the discharge cylinder, and a counterweight flap rotatably connected to the discharge end of the discharge cylinder.

[0012] Furthermore, the primary air duct body and the secondary air duct body are also provided with an adjustment component for adjusting the wind speed;

[0013] The adjustment assembly includes a primary air duct speed adjustment plate rotatably disposed within the primary air duct body and a secondary air duct speed adjustment plate rotatably connected within the secondary air duct body. One end of both the primary and secondary air duct speed adjustment plates is coaxially provided with a screw rod, and a nut for fixing the screw rod is threadedly connected to one side of the screw rod.

[0014] Furthermore, a frequency converter is provided on one side of the housing, and the frequency converter is electrically connected to the rice husk feeding auger.

[0015] Furthermore, the housing is connected to two mounting bases, and the first flow plate and the second flow plate are rotatably connected to the two mounting bases respectively.

[0016] Furthermore, the housing is provided with two sets of angle locking components, which correspond to the first flow plate and the second flow plate respectively;

[0017] The angle locking assembly includes a connecting frame connected within the housing, an abutment block slidably connected within the connecting frame, the free end of the abutment block extending to the outside of the connecting frame and used to raise the angle, a slider connected to the bottom of the abutment block, a fixing bolt connected within the slider, and both ends of the fixing bolt extending to the outside of the connecting frame and threadedly connected to a limit nut.

[0018] Furthermore, guide grooves for sliding of fixing bolts are provided on both sides of the connecting frame.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. After the rice husks enter the equipment through the feed hopper, the rice husk feeding auger works in conjunction with the frequency converter to flexibly adjust the speed according to actual needs, distributing the rice husks evenly. This design effectively avoids the problem of uneven feeding layer, prevents unstable wind speed caused by uneven feeding, and thus reduces the loss or entrainment of inferior grains.

[0021] 2. By using the sieve holes on the first and second flow plates to help loosen the rice husks, and combining the wind speed adjustment of the primary and secondary air ducts, the rice husks and secondary grains are separated in two stages. Compared with the traditional single separation, this multi-stage separation method improves the separation efficiency, makes the separation of rice husks and secondary grains more thorough, and effectively improves the overall efficiency and quality of the rice husk extraction process in the grain processing.

[0022] 3. This setup utilizes the principle of sedimentation instead of the traditional cyclone settling method. Inside the rice husk settling chamber, the rice husks settle naturally due to their own weight and air resistance. The settled rice husks then enter the discharge cylinder and are conveyed by a rice husk discharge auger. Furthermore, in the output stage, a counterweight flap structure replaces the traditional airlock. By rationally adjusting the counterweight, the rice husk discharge process can be better controlled, achieving both sedimentation collection and output of the rice husks, thus reducing equipment costs.

[0023] 4. The fan, conveying pipeline and pulse dust collector work together to extract and purify the gas inside the equipment, effectively isolate rice husks and dust, and discharge the purified gas back into the atmosphere.

[0024] 5. The angle locking component allows adjustment of the angles of the first and second flow plates. Operators can adjust this according to the characteristics of the rice husks, wind speed, and other actual conditions to further improve the movement path and looseness of the rice husks on the flow plates, thus enhancing the separation effect. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a schematic diagram showing the flow direction of rice husks in this utility model;

[0027] Figure 3 This is a schematic diagram of the connection structure between the middle cylinder auger and the counterweight flap of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the first flow plate in this utility model;

[0029] Figure 5 This is a schematic diagram of the overall mechanism of the adjustment component in this utility model;

[0030] Figure 6 This utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0031] Figure 7 This utility model Figure 6 Enlarged view of the structure at point B;

[0032] Figure 8 This is a schematic diagram of the process of a conventional grain lifting device.

[0033] In the diagram: 1. Feed hopper; 2. Rice husk feeding auger; 3. Primary air duct speed regulating plate; 4. Primary air duct body; 5. First flow plate; 501. Screen hole; 6. Slide plate; 7. Secondary air duct speed regulating plate; 8. Second flow plate; 9. Secondary air duct body; 10. Secondary grain hopper; 11. Secondary grain auger; 12. Rice husk settling chamber; 13. Rice husk discharge component; 1301. Discharge cylinder; 1302. Counterweight flap; 14. Pulse dust collector; 15. Conveying pipe; 16. Fan; 1701. Connecting frame; 1702. Contact block; 1703. Sliding block; 1704. Fixing bolt; 1705. Limit nut; 1706. Guide groove; 18. Self-locking motor; 19. Mounting base. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Please see Figure 1-8This utility model provides a technical solution: a rice husk lifting device for grain processing, including a shell and a feeding hopper 1 connected to the shell, including a rice husk feeding auger 2 rotatably connected inside the shell and located below the discharge end of the feeding hopper 1, and a multi-stage separation component for separating rice husks from secondary grains is provided below the rice husk feeding auger 2.

[0036] The multi-stage separation assembly includes a first flow plate 5 rotatably connected inside the housing for initially loosening rice husks, a primary air duct body 4 disposed inside the housing for initially separating rice husks and secondary grains and located above the first flow plate 5, a second flow plate 8 rotatably connected inside the housing and located below the first flow plate 5 for secondary loosening of rice husks, and a secondary air duct body 9 disposed above the second flow plate 8 for secondary separation of rice husks and secondary grains.

[0037] The shell is connected to a slide plate 6, which is located between the first slide plate 5 and the second slide plate 8, and is used to guide the rice husks and secondary grains that have not been sucked away by the primary air duct body 4.

[0038] The primary air duct body 4 and the secondary air duct body 9 are also equipped with regulating components for adjusting the wind speed;

[0039] The adjustment components include a primary air duct speed adjustment plate 3 rotatably disposed within the primary air duct body 4 and a secondary air duct speed adjustment plate 7 rotatably connected within the secondary air duct body 9.

[0040] In practice, rice husks enter from the feed hopper 1 and are conveyed and evenly distributed by the rice husk feeding auger 2. The rice husks fall onto the first chute 5 for initial loosening, and then, in the area of ​​the primary air duct body 4, the rice husks and secondary grains are initially separated by the difference in air velocity. The rice husks and secondary grains that are not sucked up by the primary air duct body 4 fall onto the second chute 8 via the chute 6 for secondary loosening, and then undergo secondary separation in the area of ​​the secondary air duct body 9. The primary air duct wind speed regulating plate 3 and the secondary air duct wind speed regulating plate 7 can adjust the wind speed of the corresponding air ducts respectively. The rice husk feeding auger 2, which is set up first, can evenly distribute the rice husks, improving the feeding situation. The multi-stage separation component, through two loosening and separation processes, is more efficient than the single separation of existing equipment.

[0041] Please see Figure 1-8 The shell is provided with a secondary grain hopper 10 and a rice husk settling chamber 12. The secondary grain hopper 10 is located below the second flow plate 8. The feed end of the rice husk settling chamber 12 is located below the discharge end of the primary air duct body 4 and the secondary air duct body 9. A secondary grain auger 11 is rotatably connected inside the secondary grain hopper 10. A rice husk discharge part 13 is rotatably connected inside the rice husk settling chamber 12.

[0042] In specific implementation, during the multi-stage separation process, the secondary grain falls into the secondary grain hopper 10 located below the second flow plate 8 under the action of gravity, and the secondary grain auger 11 rotates to send the secondary grain out. The rice husks sucked up by the primary air duct body 4 and the secondary air duct body 9 enter the rice husk settling chamber 12, settle inside, and are then sent out by the rice husk discharge part 13. In this setup, the secondary grain hopper 10 and the secondary grain auger 11 work together to realize the collection and transportation of the secondary grain; the rice husk settling chamber 12 and the rice husk discharge part 13 work together to realize the settling, collection, and output of the rice husks.

[0043] Please see Figure 1-8 A fan 16 is provided on one side of the housing. The exhaust end of the fan 16 is connected to a conveying pipe 15. The other end of the conveying pipe 15 is connected to the housing. A pulse dust collector 14 is connected inside the housing. The pulse dust collector 14 is connected to the conveying pipe 15.

[0044] Please refer to the following for details. Figure 8 Existing technologies typically employ multiple devices, such as cyclone separators, airlocks, and pulse jet dust collectors, to achieve dust removal effects during use.

[0045] In practice, the blower 16 draws gas from the casing through the exhaust pipe 15, and the pulse dust collector 14 filters and isolates rice husks and dust in the gas, so that the purified gas is drawn out by the blower 16 and discharged back into the atmosphere. This setup can effectively purify and discharge gas without the need for additional equipment such as cyclone separators to assist in purification or control airflow, thus reducing equipment costs.

[0046] Please see Figure 1-8 The rice husk discharge component 13 includes a discharge cylinder 1301 connected inside the housing, a rice husk discharge auger rotatably connected inside the discharge cylinder 1301, and a counterweight flap 1302 rotatably connected to the discharge end of the discharge cylinder 1301.

[0047] In practice, after the rice husks settle in the rice husk settling chamber 12, they enter the discharge cylinder 1301. The rice husk discharge auger rotates to transport the rice husks. The counterweight flap 1302 can adjust the counterweight according to the rice husk output to control the discharge process. The design of the counterweight flap 1302 in this setting can flexibly adapt to different rice husk outputs.

[0048] Please see Figure 1-8 Both the first flow plate 5 and the second flow plate 8 have multiple sieve holes 501 arranged in a rectangular array.

[0049] It should be noted that the size of the sieve aperture 501 can be selected and set according to the actual production situation, thereby improving the adaptability of the equipment.

[0050] In practice, when the rice husks move on the first flow plate 5 and the second flow plate 8, the sieve holes 501 can help to further loosen the rice husks, while allowing some small impurities to pass through.

[0051] Please see Figure 1-8 The adjustment assembly also includes a screw rod coaxially arranged with the primary air duct speed adjustment plate 3 and the secondary air duct speed adjustment plate 7, and a nut for fixing the screw rod is threaded to one side of the screw rod.

[0052] In practice, rotating the screw causes both the primary and secondary air duct speed regulating plates 3 and 7 to rotate synchronously. Once the plates are in the correct positions, rotating the nut secures the screw in place using the threaded friction between the nut and the screw. At this point, the angles of the primary and secondary air duct speed regulating plates 3 and 7 are locked.

[0053] Please see Figure 1-8 A frequency converter is installed on one side of the casing, and the frequency converter is electrically connected to the rice husk feeding auger 2.

[0054] In practice, the frequency converter is electrically connected to the rice husk feeding auger 2. The speed of the rice husk feeding auger 2 is adjusted by changing the electrical parameters. At the same time, the frequency converter can flexibly adjust the speed of the rice husk feeding auger 2 according to the actual feeding requirements to further ensure uniform rice husk feeding.

[0055] Please see Figure 1-8 The housing contains two mounting bases 19, and the first flow plate 5 and the second flow plate 8 are rotatably connected to the two mounting bases 19 respectively.

[0056] In practice, the first flow plate 5 and the second flow plate 8 are rotatably connected to the mounting base 19 to achieve angle adjustment.

[0057] Please see Figure 1-8 The housing is equipped with two sets of angle locking components, which correspond to the first flow plate 5 and the second flow plate 8 respectively.

[0058] The angle locking assembly includes a connecting frame 1701 connected within the housing, an abutment block 1702 slidably connected within the connecting frame 1701, the free end of the abutment block 1702 extending to the outside of the connecting frame 1701 and used to raise the angle, a slider 1703 connected to the bottom of the abutment block 1702, a fixing bolt 1704 connected within the slider 1703, and both ends of the fixing bolt 1704 extending to the outside of the connecting frame 1701 and threadedly connected to a limit nut 1705.

[0059] In practice, when it is necessary to adjust the angle of the first flow plate 5 and the second flow plate 8, loosen the limit nut 1705, slide the fixing bolt 1704 to drive the slider 1703 and the contact block 1702 to move, and tighten the limit nut 1705 to fix it after adjusting the angle.

[0060] Please see Figure 1-8 Both sides of the connecting frame 1701 are provided with guide grooves 1706 for the fixing bolts 1704 to slide.

[0061] In practice, the guide groove 1706 provides a sliding track for the fixing bolt 1704, ensuring that the fixing bolt 1704 slides smoothly during the adjustment process.

[0062] Working principle: Rice husks enter the equipment through feed hopper 1, and the rice husk feeding auger 2, which is rotatably connected below the discharge end of feed hopper 1, starts to work. The frequency converter, which is electrically connected to the rice husk feeding auger 2, flexibly adjusts its speed by changing electrical parameters, thereby conveying the rice husks and achieving uniform distribution, effectively improving the feeding situation and avoiding the problem of uneven feeding layer.

[0063] After being evenly distributed by the rice husk feeding auger 2, the rice husks fall onto the first flow plate 5, which is rotatably connected inside the shell. The first flow plate 5 has a rectangular array of triangularly arranged sieve holes 501 to further loosen the rice husks. The primary air duct body 4, located above the first flow plate 5, generates airflow. A primary air duct speed regulating plate 3, rotatably mounted inside the primary air duct body 4, is driven by a self-locking motor 18 connected to one side of the shell via a coupling, thereby regulating the airflow speed within the primary air duct body 4. Utilizing the difference in airflow speed, a large amount of rice husks is sucked away in the area of ​​the primary air duct body 4, achieving initial separation of rice husks and secondary grains.

[0064] Rice husks and secondary grains that are not sucked away by the primary air duct body 4 are drawn down by gravity onto the second flow plate 8 via a chute 6 connected inside the shell and located between the first flow plate 5 and the second flow plate 8. The second flow plate 8 is also rotatably connected to the mounting base 19, allowing for angle adjustment, and its surface is also provided with sieve holes 501 for secondary loosening of the rice husks. The secondary air duct body 9, located above the second flow plate 8, generates suction. The secondary air duct wind speed regulating plate 7, rotatably connected inside the secondary air duct body 9, is driven to rotate by another self-locking motor 18 through a coupling, adjusting the wind speed inside the secondary air duct body 9, thus performing secondary separation of rice husks and secondary grains in this area.

[0065] During the multi-stage separation process, the secondary grains fall into the secondary grain hopper 10 located below the second flow plate 8 under the influence of gravity. The secondary grain auger 11, rotatably connected within the secondary grain hopper 10, conveys the secondary grains out of the equipment, completing the collection and transport of the secondary grains. The rice husks sucked away by the primary air duct body 4 and the secondary air duct body 9 enter the rice husk settling chamber 12. Due to the large space of the rice husk settling chamber 12, the air velocity is lower than the suspension velocity of the rice husks, causing them to settle. The settled rice husks enter the discharge cylinder 1301, where a rotatably connected rice husk discharge auger transports the rice husks. The counterweight flap 1302, rotatably connected to the discharge end of the discharge cylinder 1301, can adjust the counterweight according to the rice husk output, controlling the discharge process and achieving the settling collection and output of the rice husks.

[0066] A fan 16 is installed on one side of the casing, and its exhaust end is connected to a pulse dust collector 14 inside the casing via a conveying pipe 15. The fan 16 draws gas from inside the casing through the exhaust end and the conveying pipe 15. The pulse dust collector 14 filters and isolates rice husks and dust in the gas, so that the purified gas is drawn out by the fan 16 and discharged back into the atmosphere, effectively purifying the exhaust gas without the need for additional equipment such as cyclone separators to assist in purification or control airflow.

[0067] When it is necessary to adjust the angle of the first flow plate 5 and the second flow plate 8, the operator loosens the limit nuts 1705 at both ends of the fixing bolt 1704 in the angle locking assembly and slides the fixing bolt 1704. The fixing bolt 1704 drives the slider 1703 connected to the bottom of the abutment block 1702 to move, thereby causing the abutment block 1702 to slide within the connecting frame 1701, thus adjusting the angle of the first flow plate 5 and the second flow plate 8. After the adjustment is completed, the limit nuts 1705 are tightened to fix it.

Claims

1. A rice hull grain extractor for grain processing, comprising a housing and a feed hopper (1) connected to the housing, characterized in that, The device comprises a rice hull feeding auger (2) rotatably connected in a shell, a multi-stage separation assembly arranged below the rice hull feeding auger (2) for separating rice hulls from secondary grains; The multi-stage separation assembly comprises a first flow plate (5) rotatably connected in the shell for initially loosening the rice hulls, a second flow plate (8) rotatably connected in the shell below the first flow plate (5) for secondly loosening the rice hulls, and a plurality of rectangularly arranged sieve holes (501) provided on the first flow plate (5) and the second flow plate (8), and the sieve holes (501) are arranged in a triangular shape.

2. The rice hull grain separator for grain processing according to claim 1, wherein: A primary air duct body (4) for initially separating the rice hulls from the secondary grains is arranged in the shell above the first flow plate (5), a secondary air duct body (9) for secondly separating the rice hulls from the secondary grains is arranged above the second flow plate (8), and a slide plate (6) is rotatably connected in the shell between the first flow plate (5) and the second flow plate (8) for guiding the rice hulls and the secondary grains not sucked by the primary air duct body (4).

3. The rice hull grain separator as claimed in claim 1, wherein: The shell is provided with a secondary grain hopper (10) and a rice hull settling chamber (12), wherein the secondary grain hopper (10) is arranged below the second flow plate (8), the inlet end of the rice hull settling chamber (12) is arranged below the outlet end of the primary air duct body (4) and the secondary air duct body (9), a secondary grain auger (11) is rotatably connected in the secondary grain hopper (10), and a rice hull discharge member (13) is rotatably connected in the rice hull settling chamber (12).

4. The rice hull grain separator as claimed in claim 1, wherein: A fan (16) is arranged on one side of the shell, a conveying pipeline (15) is connected to the suction end of the fan (16), the other end of the conveying pipeline (15) is connected to the shell, a pulse dust collector (14) is connected in the shell, and the pulse dust collector (14) and the conveying pipeline (15) are connected to each other.

5. The rice hull grain separator as claimed in claim 3, wherein: The rice hull discharge member (13) comprises a discharge cylinder (1301) connected in the shell, a rice hull discharge auger rotatably connected in the discharge cylinder (1301), and a counterweight flap (1302) rotatably connected to the discharge end of the discharge cylinder (1301).

6. The rice hull grain separator as claimed in claim 2, wherein: The primary air duct body (4) and the secondary air duct body (9) are further provided with an adjusting assembly for adjusting the air speed. The adjusting assembly comprises a primary air duct speed adjusting plate (3) rotatably arranged in the primary air duct body (4) and a secondary air duct speed adjusting plate (7) rotatably connected in the secondary air duct body (9), one end of the primary air duct speed adjusting plate (3) and the secondary air duct speed adjusting plate (7) is coaxially provided with a screw rod, and a nut is threadedly connected to one side of the screw rod for fixing the screw rod.

7. The rice hull grain separator as claimed in claim 1, wherein: A frequency converter is arranged on one side of the shell, and the frequency converter is electrically connected with the rice hull feeding auger (2).

8. The rice hull grain separator as claimed in claim 1, wherein: Two mounting seats (19) are connected in the shell, and the first flow plate (5) and the second flow plate (8) are rotatably connected to the two mounting seats (19), respectively.

9. The rice hull grain separator as claimed in claim 1, wherein: Two groups of angle locking assemblies are arranged in the shell, and the two groups of angle locking assemblies correspond to the first flow plate (5) and the second flow plate (8), respectively. The angle locking assembly comprises a connecting frame (1701) connected in the shell, a resisting block (1702) slidingly connected in the connecting frame (1701), a free end of the resisting block (1702) extending to the outside of the connecting frame (1701) and used for lifting the angle, a sliding block (1703) connected at the bottom of the resisting block (1702), and a fixing bolt (1704) connected in the sliding block (1703), both ends of the fixing bolt (1704) extending to the outside of the connecting frame (1701) and being threadedly connected with a limiting nut (1705).

10. The rice hull grain separator as claimed in claim 9, wherein: Guiding grooves (1706) for the sliding of the fixing bolt (1704) are formed at both sides of the connecting frame (1701).

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