A rice grain cleaning machine

Abstract

The application discloses a rice grain cleaning machine in the field of rice processing devices, which comprises a base and a bottom-opened shell, the shell is fixedly connected to the top of the base, the side wall of the shell is provided with a feeding mechanism and an air inlet mechanism, the top of the base is sequentially provided with a storage box and a plurality of collecting boxes arranged in steps from the end far away from the feeding mechanism to the end close to the feeding mechanism, the collecting box close to the feeding mechanism has the lowest height, the lower end of the base is provided with an extension mechanism, the air inlet mechanism is communicated to the lower side of the guide plate in each collecting box, the top wall of the shell above the collecting box is provided with a dust suction mechanism, the upper end of the side wall of the collecting box far away from the feeding mechanism is provided with a stirring part, and the upper end of the side wall of the collecting box close to the feeding mechanism is provided with a notch. The application can clearly screen out the empty grains, can simultaneously realize the empty grain screening and the quality grading of the rice, and can effectively reduce the dust and other impurities in the rice.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of rice processing devices, and particularly relates to a rice grain removing machine. BACKGROUND

[0002] Rice, also known as rice, rice, rice, is a cereal crop of the genus Oryza in the Poaceae family. During the growth of rice, there are often unripe grains. During the storage of rice, these unripe grains often need to be screened. Traditionally, the unripe grains are screened by using a manual dustpan or a small disc-type shaker. However, these traditional methods are inefficient and have limited screening effect, which cannot meet the demand.

[0003] To solve the above problems, Chinese patent document CN104028464B proposes a rice grain removing machine, which belongs to the field of agricultural machinery separation technology. The technical scheme is that a vibrating screen driven by a power mechanism is arranged on a base, the screen plate of the vibrating screen has a high end and a low end; a material collecting box with a flow regulating valve is arranged above the vibrating screen and fixed on a support, the low end of the screen plate is located in a negative pressure material port, one end of a material conveying pipe is connected to the negative pressure material port, and the other end is inserted into a negative pressure bin, a material discharging pipe with an axial flow fan is also inserted into the negative pressure bin, and the pipe opening of the material discharging pipe and the pipe opening of the material conveying pipe are both located in the bag opening of a material collecting bag; a blower is arranged between the lower outlet of the material collecting box and the screen plate, and the air direction of the blower is towards the high end of the screen plate. The present application combines the screening of the vibrating screen, the gas separation of the blower and the negative pressure separation of the axial flow fan to realize effective separation of unripe grains and real grains and improve the unripe grain removal efficiency.

[0004] However, in actual use, although the unripe grains can be screened, due to the different degrees of unfullness of the unripe grains in the rice, part of the unripe grains are difficult to be completely screened in the screening process and are easily stored together with normal rice; part of the small rice grains are also screened out as unripe grains in the vibrating screen screening process. In summary, the screening of unripe grains in the prior art cannot clearly remove the unripe grains in the rice. SUMMARY

[0005] The purpose of the present application is to provide a rice grain removing machine which can clearly screen out unripe grains and simultaneously realize unripe grain screening and rice quality grading, and can effectively reduce dust and other impurities in the rice.

[0006] To achieve the above purpose, the technical scheme of the present application is as follows: a rice grain removing machine, comprising a base and a bottom-opened shell, the shell being fixedly connected to the top of the base, the side wall of the shell being provided with a feeding mechanism for inputting rice and an air inlet mechanism for inputting air, the feeding mechanism being communicated with a first fan, the side wall of the shell opposite to the feeding mechanism being provided with an air outlet and a discharge port;

[0007] The base top is sequentially provided with a storage box and a plurality of collecting boxes arranged in steps from the end far away from the feeding mechanism to the end close to the feeding mechanism, the collecting box close to the feeding mechanism has the lowest height, the base lower end is provided with a telescopic mechanism, the output shaft of the telescopic mechanism penetrates into the collecting box, the inner side wall of the collecting box is slidably provided with a guide plate, the bottom of the guide plate is provided with a hinged handle and a main connecting handle symmetrically arranged on both sides of the hinged handle, the output shaft of the telescopic mechanism is hinged with the hinged handle, and the output shaft of the telescopic mechanism is symmetrically provided with a secondary connecting handle on both sides, the main connecting handle and the secondary connecting handle are hung with a tension spring, the hinged handle is provided with a limiting portion for limiting the rotation angle of the guide plate, the guide plate is inclined to the feeding mechanism in the initial state, and a plurality of ventilation holes are formed in the side of the guide plate with higher height in the initial state.

[0008] The air inlet mechanism is communicated below the guide plate in each collecting box, the top wall of the shell above the collecting box is provided with a dust suction mechanism, the upper end of the side wall of the collecting box away from the feeding mechanism is provided with a pushing portion, and the upper end of the side wall of the collecting box close to the feeding mechanism is provided with a gap for the rotation of the guide plate.

[0009] The technical principle of the above scheme is as follows: rice is added through the feeding mechanism, the rice is transported into the shell under the action of the wind power of the first fan, and the air inlet mechanism sends air to the bottom of each collecting box, so that upward air force is generated in the collecting box. Because the weight of rice with different fullness degrees is different, the downward gravity is different, the rice will gradually fall into the collecting box.

[0010] Because the collecting boxes are arranged in steps, the resistance of the air and the rice in the collecting box far away from the feeding mechanism is greater, so that the rice closest to the feeding mechanism is the most full, the rice in the collecting box far away from the feeding mechanism is the least full, thereby realizing the quality grading of the rice. Because the weight of the chaff is lighter, the chaff is usually discharged from the dust suction mechanism or across the collecting box into the storage box under the action of the upward air force of the air inlet mechanism or the wind power of the first fan, or part of the chaff is directly discharged from the discharge port to the shell, thereby realizing the screening of the chaff.

[0011] However, part of the chaff may fall into the collecting box close to the storage box. The subsequent telescopic mechanism is first used to displace the guide plate upward, when the guide plate contacts the pushing portion, the guide plate generates transmission along the hinged handle due to the blocking of the pushing portion, when the included angle between the guide plate close to the pushing portion and the output shaft of the telescopic mechanism gradually decreases, the guide plate will be kept at an inclined angle under the tension of the tension spring when the included angle is an acute angle, so that the guide plate changes from the initial inclination to the feeding mechanism to the inclination to the storage box, so that the rice on the guide plate gradually falls into the next adjacent collecting box. In this process, the first fan remains running, the wind power generated by the first fan passes through the ventilation holes to further screen the rice gradually sliding off the guide plate, thereby further improving the screening effect of the chaff, and the guide plate is reset to be inclined to the feeding mechanism during the downward displacement process.

[0012] The above scheme has the following beneficial effects:

[0013] 1、The multiple collecting boxes arranged in steps, in the process of using wind to send rice, the rice is subjected to the upward wind force of the air inlet mechanism, so it will not easily fall into the collecting box. However, the rice will gradually fall into the collecting box due to its own gravity and the gradually increasing resistance to wind force of the collecting box arranged in steps, and the fullness degree of the rice in the collecting box from close to the feeding mechanism to far away from the feeding mechanism will gradually decrease. The gravity of the chaff is lighter, so the chaff with different fullness degrees can be discharged through the dust suction mechanism and the discharge port, or collected into the storage box far away from the feeding mechanism. Compared with the simple screening in the prior art, the rice and chaff can be screened and the rice quality grading can be completed at the same time.

[0014] 2、The up and down displacement of the guide plate by the telescopic mechanism, combined with the tension spring, makes the guide plate can cyclically switch the inclination direction. When the rice in the collecting box needs to be discharged, it can be collected one by one from close to the storage box, or the rice in the collecting box can be mixed and collected. However, the chaff in the rice can be screened again by the wind force generated by the first fan through the ventilation hole during the collection process, effectively improving the screening quality of the rice.

[0015] 3、Compared with the prior art, since the air inlet mechanism continuously sends air into the collecting box, the upward wind force generated thereby can make the dust attached to the rice enter the dust suction mechanism upward, and the chaff with the worst fullness degree is collected through the dust suction mechanism, so as to avoid the dust and impurities such as rice straw generated thereby from scattering into the collected rice or flying in the air, which can hinder the operator.

[0016] Further, the feeding mechanism includes a feeding hopper and a feeding pipe, the feeding hopper is fixedly connected to the top of the feeding pipe, and the feeding hopper is in communication with the feeding pipe, and the two ends of the feeding pipe are respectively in communication with the air outlet of the first fan and the inside of the shell.

[0017] Beneficial effect: The rice is gradually added from the top wall of the feeding pipe, and after being subjected to the wind force of the first fan, the rice located in the feeding pipe will be pushed into the shell by the wind force of the first fan due to the narrow space inside the feeding pipe, so as to avoid the rice from directly falling into the collecting box without being subjected to the wind force of the first fan.

[0018] Further, the air inlet mechanism includes a second fan installed on the outer wall of the shell, the second fan is communicated with a main pipeline, the main pipeline is communicated with a plurality of auxiliary pipelines, the auxiliary pipelines extend into the collecting box, and the air outlets of the auxiliary pipelines are located below the guide plate.

[0019] Beneficial effect: through the second fan to each collection tank inside the air, because the sub-pipeline distance from the second fan gradually increases, so the wind into the collection tank will gradually decrease, gradually reduced wind on the water to the parabolic up the force will gradually decrease, thus avoiding the wind too big to make the water can not fall into the collection tank, and make the quality of paddy classification more clear.

[0020] Further, the telescopic mechanism includes a corresponding number of driving members corresponding to the collection tank, the driving members are installed on the bottom of the base, the output shaft of the driving member is coaxially fixedly connected with a driving shaft, the driving shaft is threadedly connected with a telescopic shaft, and the telescopic shaft is hingedly connected with the hinge handle.

[0021] Beneficial effect: the driving member provides power, the driving shaft and the telescopic shaft are in threaded motion, and the up-down displacement of the guide plate is realized. The up-down displacement distance of the guide plate is convenient to control.

[0022] Further, the dust collection mechanism includes a plurality of auxiliary dust collection pipes, the auxiliary dust collection pipes are fixedly connected to the top wall of the shell, the openings of the auxiliary dust collection pipes correspond to the openings of the collection tanks one by one, a main dust collection pipe is arranged at the top of the shell, the auxiliary dust collection pipes are in communication with the main dust collection pipe, and a mounting ring groove for mounting a collection bag is arranged at the tail end of the main dust collection pipe.

[0023] Beneficial effect: the wind power of the second fan can effectively send dust, rice awns and light chaff and other impurities into the auxiliary dust collection pipes corresponding to the openings of the collection tanks, and the dust, rice awns and light chaff and other impurities are collected by mounting the collection bag at the tail end of the main dust collection pipe, so that the operation personnel are prevented from being disturbed by the dust and other impurities.

[0024] Further, the lower end of the guide plate in the initial state is provided with a baffle.

[0025] Beneficial effect: the baffle assists in blocking the paddy on the guide plate, so that the paddy is prevented from falling off during rotation of the guide plate.

[0026] Further, the side wall of the collection tank away from the feeding mechanism is provided with a discharging port at the upper end, and the discharging port is located below the stirring part.

[0027] Beneficial effect: the discharging port receives the paddy that is separated from the guide plate due to shaking during rotation of the guide plate, so that the paddy falls into the next collection tank or storage tank through the discharging port, and the paddy is prevented from falling off.

[0028] Further, a sealing member is arranged at the position where the guide plate contacts the inner side wall of the collection tank, the sealing member is internally provided with a rolling ball that is in rotational cooperation with the inner side wall of the collection tank, and the guide plate is in vertical sliding cooperation with the inner side wall of the collection tank through the rolling ball.

[0029] Beneficial effect: increase the sealing effect of the guide plate through the sealing piece, avoid the rice from sliding from the gap; and reduce the friction between the sealing piece and the inner wall of the collecting box through the ball, so that the guide plate is more easily slid.

[0030] Further, the position of the exhaust port corresponds to the position of the feeding mechanism.

[0031] Beneficial effect: the exhaust port corresponds to the position of the feeding mechanism, so that the air generated by the first fan can be quickly discharged from the exhaust port, avoiding the air inside the shell to be chaotic, resulting in the reduction of the rice grading and screening effect.

[0032] Further, the limiting part includes a limiting block integrally formed at both ends of the hinged handle, and the included angle between the limiting blocks is 60°.

[0033] Beneficial effect: the limiting block limits the rotation angle of the guide plate to be 60° at most, and the limiting block limits the inclination of the guide plate, avoiding the large angle inclination of the guide plate caused by the tension spring.

[0034] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is an outline drawing of the embodiment of the rice chaff removing machine of the application;

[0036] Figure 2 It is a sectional view of the embodiment of the rice chaff removing machine of the application;

[0037] Figure 3 It is a partial schematic view of the embodiment of the rice chaff removing machine of the application;

[0038] Figure 4 It is a partial sectional view of the embodiment of the rice chaff removing machine of the application. DETAILED DESCRIPTION

[0039] The embodiments of the application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the application, and cannot be understood as limiting the application.

[0040] In the description of the present application, it is to be understood by the terms "longitudinal", "transverse", "vertical", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0041] In the description of the present application, unless otherwise specified and limited, it is to be understood that the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be mechanical connection or electrical connection, it can be the communication between two elements, it can be direct connection or indirect connection through intermediate medium, and the specific meaning of the above terms can be understood by those skilled in the art according to the specific circumstances.

[0042] The specific embodiments are described in detail below:

[0043] The reference signs in the drawings of the specification include: first fan 1, feed hopper 2, feed pipe 3, auxiliary dust collection pipe 4, main dust collection pipe 5, exhaust port 6, shell 7, discharge port 8, base 9, storage box 10, auxiliary pipe 11, driving part 12, collection box 13, main pipe 14, second fan 15, guide plate 16, air hole 17, main connecting handle 18, tension spring 19, hinged handle 20, auxiliary connecting handle 21, limit block 22.

[0044] Example one: as shown in the accompanying Figures 1-4 A rice grain removing machine, including a base 9 and a bottom open shell 7, the shell 7 is fixedly connected to the top of the base 9, and a part of space is reserved on the upper surface of the base 9, a support frame is installed in the part of reserved space, combined with the accompanying Figure 2 As shown, the right side wall of the shell 7 is fixedly connected with a feeding mechanism for inputting rice and an air inlet mechanism for inputting air through bolts, and the feeding mechanism is supported by the support frame, the feeding mechanism is communicated with the first fan 1, the left end side wall of the shell 7 is fixedly connected with the exhaust port 6 and the discharge port 8 through bolts, and the exhaust port 6 and the discharge port 8 are communicated with the inside of the shell 7.

[0045] Combined with the accompanying Figure 2As shown, the top of the base 9 is sequentially fixedly connected from left to right with two adjacent storage boxes 10 and three collecting boxes 13 arranged in steps, the rightmost collecting box 13 is the lowest in height, the storage box 10 is of a cylindrical structure, the collecting box 13 is of a rectangular structure, the bottom of the storage box 10 is provided with a bolt plate for closing the opening below the storage box 10, the lower end of the base 9 is fixedly connected with an extension mechanism, the output shaft of the extension mechanism penetrates into the collecting box 13, the inner side wall of the collecting box 13 is slidably fitted with a guide plate 16, the bottom of the guide plate 16 is fixedly connected with a hinged handle 20 and a main connecting handle 18 symmetrically fixedly connected on both sides of the hinged handle 20, the output shaft of the extension mechanism is hinged with the hinged handle 20, and the output shaft of the extension mechanism is symmetrically welded with a secondary connecting handle 21 on both sides, a tension spring 19 is hung between the main connecting handle 18 and the secondary connecting handle 21, the hinged handle 20 is fixedly connected with a limiting portion for limiting the rotation angle of the guide plate 16, the guide plate 16 is inclined to the right in the initial state, and a plurality of ventilation holes are formed in the side of the guide plate 16 which is higher in the initial state.

[0046] The air inlet mechanism is communicated to below the guide plate 16 in each collecting box 13, the top wall of the shell 7 is fixedly connected with a dust collection mechanism above the collecting box 13, the upper end of the left side wall of each collecting box 13 is fixedly connected with a pushing portion, the pushing portion is of a hemispherical structure, and the upper end of the right side wall of each collecting box 13 is provided with a gap for rotation of the guide plate 16.

[0047] The specific implementation process is as follows:

[0048] The pre-screened rice is added from the feeding mechanism, the first fan 1 delivers the rice into the shell 7, and the air inlet mechanism introduces air into the collecting box 13, the air passes through the ventilation holes to above the collecting box 13, the rice is subjected to horizontal wind force and vertical wind force, thereby maintaining a relatively slow parabolic motion, the heaviest (full) rice falls into the rightmost collecting box 13, the second heaviest (moderately full) rice falls into the middle collecting box 13, and the lightest (poor quality) rice falls into the leftmost collecting box 13.

[0049] The chaff is too light in weight, the lightest part is delivered by the vertical wind force into the dust collection mechanism, the lighter part is delivered into the discharge port 8, and the heavier part is temporarily stored in the storage box 10, and the chaff in the storage box 10 is discharged before the rice is discharged, and then the rice is discharged in turn.

[0050] The dust, rice awns and the like carried by the lighter chaff into the dust collection mechanism are effectively collected and treated.

[0051] Example two: as shown in the attached Figures 1-2As shown: compared with example one, the difference lies in that the feeding mechanism comprises a feeding hopper 2 and a feeding pipe 3, the feeding hopper 2 is of a conical structure, the feeding hopper 2 is welded and fixed to the top of the feeding pipe 3, and the feeding hopper 2 is in communication with the feeding pipe 3, and the feeding pipe 3 is in communication with the air outlet of the first fan 1 and the inside of the shell 7 respectively.

[0052] The specific implementation process is as follows:

[0053] Rice is added from the feeding hopper 2, falls into the feeding pipe 3, and the first fan 1 applies wind power to the rice falling into the feeding pipe 3, so that the rice enters the shell for screening.

[0054] Example three: as shown in the accompanying Figures 1-2 As shown: compared with example two, the difference lies in that the air inlet mechanism comprises a second fan 15 installed on the outer side wall of the shell 7, the second fan 15 is in communication with a main pipeline 14, the main pipeline 14 is in communication with a plurality of auxiliary pipelines 11, the auxiliary pipelines 11 all extend into the collecting box 13, the air outlets of the auxiliary pipelines 11 are located below the guide plate 16, and the outlets of the auxiliary pipelines 11 are all located in the area below the ventilation groove.

[0055] The specific implementation process is as follows:

[0056] The second fan 15 sends air into the main pipeline 14, the wind power reaches each auxiliary pipeline 11 through the main pipeline 14, the auxiliary pipeline 11 delivers the wind power to the area of the collecting box 13 below the guide plate 16, and the wind power is delivered to the area above the collecting box 13 through the ventilation holes.

[0057] Example four: as shown in the accompanying Figures 2-4 As shown: compared with example three, the difference lies in that the telescopic mechanism comprises three groups of driving members 12, the driving member 12 of the present embodiment adopts a servo motor, the driving member 12 is installed on the bottom of the base 9, the output shaft of the driving member 12 is coaxially fixedly connected with a driving shaft through a shaft coupling, the driving shaft is threadedly connected with a telescopic shaft, the diameter of the telescopic shaft is larger than that of the driving shaft, and the telescopic shaft is hinged with the articulated handle 20

[0058] The specific implementation process is as follows:

[0059] The driving member 12 provides power, the driving shaft and the telescopic shaft are in threaded motion, the telescopic shaft drives the guide plate 16 to rise or fall, and the discharge of the rice is completed.

[0060] Example five: as shown in the accompanying Figure 2 As shown: compared with example four, the difference lies in that the dust collection mechanism comprises a plurality of auxiliary dust collection pipes 4, the auxiliary dust collection pipes 4 are fixedly connected to the top wall of the shell 7, the openings of the auxiliary dust collection pipes 4 correspond to the openings of the collecting boxes 13 one by one, and the opening heights of the auxiliary dust collection pipes 4 are arranged in the same stepped manner as the collecting boxes 13.

[0061] The top of the shell 7 is fixedly connected with the main dust suction pipe 5, and the auxiliary dust suction pipes 4 are all communicated with the main dust suction pipe 5. The communication part of the rightmost auxiliary dust suction pipe 4 with the main dust suction pipe 5 is in an arc structure, so as to change the wind direction and transport impurities. The tail end of the main dust suction pipe 5 is provided with a mounting ring groove for mounting a collecting bag. The collecting bag can be fixed to the mounting ring groove by binding or other ways, so as to collect dust.

[0062] The specific implementation process is as follows:

[0063] The second fan 15 provides upward wind force in the collecting box 13, so as to transport impurities such as dust with light weight into the auxiliary dust suction pipe 4 and discharge to the collecting bag through the main dust suction pipe 5.

[0064] Example six: as shown in the accompanying Figure 2 : compared with example five, the difference lies in that the right end of the guide plate 16 is integrally formed with a baffle.

[0065] The specific implementation process is as follows:

[0066] In the process of rotating the guide plate 16, the baffle assists in blocking the rice on the guide plate 16, so as to avoid the rice from falling off.

[0067] Example seven: as shown in the accompanying Figure 2 : compared with example six, the difference lies in that the left side wall of the collecting box 13 is provided with a discharging port at the upper end. The discharging port is located below the driving part, and the distance is preferably 2 cm.

[0068] The specific implementation process is as follows:

[0069] The discharging port catches the rice separated from the guide plate 16 due to shaking in the process of rotating the guide plate 16, and the rice falls into the next collecting box 13 or the storage box 10 through the discharging port.

[0070] Example eight: as shown in the accompanying Figure 2 : compared with example seven, the difference lies in that the guide plate 16 is provided with a sealing element (not shown in the drawing) at the contact part with the inner side wall of the collecting box 13. The sealing element is slidably matched with a ball bearing which is rotationally matched with the inner side wall of the collecting box 13. The guide plate 16 is vertically slidably matched with the inner side wall of the collecting box 13 through the ball bearing.

[0071] The specific implementation process is as follows:

[0072] The sealing element increases the sealing effect of the guide plate 16, so as to avoid the rice from sliding off from the gap. In the process of sliding the guide plate 16 along the inner side wall of the collecting box 13, the ball bearing reduces the friction between the sealing element and the inner side wall of the collecting box 13.

[0073] Example nine: as shown in the accompanying Figure 2As shown: compared with example eight, the difference is that the position of exhaust port 6 corresponds to the position of feeding mechanism, preferably a filter screen is arranged at exhaust port 6, impurities are filtered through the filter screen.

[0074] The specific implementation process is as follows:

[0075] The wind force generated by the first fan 1 can be quickly discharged from the exhaust port 6.

[0076] Example ten: as shown in the accompanying Figure 4 As shown: compared with example nine, the difference is that the limiting part includes limiting blocks 22 integrally formed at both ends inside the hinged handle 20, and the included angle between the limiting blocks 22 is 60°

[0077] The specific implementation process is as follows:

[0078] During the rotation of the guide plate 16 along the hinged handle 20, when the inclination of one side reaches 30°, it cannot continue to rotate, and the inclination of the guide plate 16 is limited.

[0079] The above is only an embodiment of the present application, and the well-known specific structure and / or characteristics in the scheme are not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be regarded as the protection scope of the present application, and these will not affect the effect and practicality of the patent. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A rice chaff removal machine, characterized in that: The housing includes a base and a bottom opening. The housing is fixedly connected to the top of the base. The side wall of the housing is provided with a feeding mechanism for feeding rice and an air intake mechanism for feeding air. The feeding mechanism is connected to a first fan. The side wall of the housing opposite to the feeding mechanism is provided with an exhaust port and a discharge port. The top of the base has a storage box and several collection boxes arranged in a stepped manner from the end furthest from the feeding mechanism to the end closest to the feeding mechanism. The collection box closest to the feeding mechanism is the lowest in height. A telescopic mechanism is provided at the bottom of the base. The output shaft of the telescopic mechanism passes through the collection box. Guide plates are slidably fitted on the inner sidewalls of the collection box. A hinge handle and main connecting handles symmetrically arranged on both sides of the hinge handle are provided at the bottom of the guide plate. The output shaft of the telescopic mechanism is hinged to the hinge handle, and secondary connecting handles are symmetrically arranged on both sides of the output shaft of the telescopic mechanism. A tension spring is connected between the main connecting handle and the secondary connecting handle. A limiting part for limiting the rotation angle of the guide plate is provided in the hinge handle. In the initial state, the guide plate is inclined towards the feeding mechanism, and several ventilation holes are opened on the side of the guide plate with higher height in the initial state. A baffle is provided at the side of the guide plate with lower height in the initial state. The air intake mechanism is connected to the bottom of the guide plate in each collection box. A dust suction mechanism is provided on the top wall of the housing above the collection box. A toggle part is provided on the upper end of the side wall of the collection box away from the feeding mechanism. A notch is provided on the upper end of the side wall of the collection box near the feeding mechanism for the guide plate to rotate. The telescopic mechanism is used to move the guide plate upward. When the guide plate contacts the actuating part, the blocking of the actuating part causes the guide plate to rotate along the hinge handle. The angle between the guide plate near the actuating part and the output shaft of the telescopic mechanism gradually decreases. When the angle is acute, the guide plate is held at the tilt angle by the tension of the tension spring. The guide plate changes from the initial tilt towards the feeding mechanism to the tilt towards the storage box. The rice on the guide plate gradually falls into the next adjacent collection box. The wind generated by the first fan screens the rice that gradually slides off the guide plate again through the ventilation holes. The telescopic mechanism is also used to move the guide plate downwards, so that the guide plate returns to its original position and tilts back towards the feeding mechanism.

2. The rice chaff removal machine according to claim 1, characterized in that: The feeding mechanism includes a feeding hopper and a feeding pipe. The feeding hopper is fixedly connected to the top of the feeding pipe and is connected to the feeding pipe. The two ends of the feeding pipe are connected to the air outlet of the first fan and the inside of the casing, respectively.

3. The rice chaff removal machine according to claim 2, characterized in that: The air intake mechanism includes a second fan installed on the outer wall of the housing. The second fan is connected to a main duct, and the main duct is connected to several secondary ducts. All secondary ducts extend into the collection box, and the air outlets of the secondary ducts are located below the guide plate.

4. The rice chaff removal machine according to claim 3, characterized in that: The telescopic mechanism includes a number of drive components corresponding to the collection box. All drive components are installed at the bottom of the base. The output shaft of the drive component is coaxially fixedly connected to the drive shaft. The drive shaft is threadedly connected to the telescopic shaft, and the telescopic shaft is hinged to the hinge handle.

5. The rice chaff removal machine according to claim 4, characterized in that: The vacuuming mechanism includes several auxiliary vacuum pipes, which are fixedly connected to the top wall of the housing. The openings of the auxiliary vacuum pipes correspond one-to-one with the openings of the collection box. A main vacuum pipe is provided on the top of the housing, and the auxiliary vacuum pipes are all connected to the main vacuum pipe. The tail end of the main vacuum pipe is provided with an installation ring groove for installing the collection bag.

6. The rice chaff removal machine according to claim 5, characterized in that: The upper side wall of the collection box away from the feeding mechanism is equipped with a discharge port, which is located below the actuating part.

7. The rice chaff removal machine according to claim 6, characterized in that: A sealing element is provided at the contact point between the guide plate and the inner wall of the collection box. The sealing element contains a ball bearing that rotates with the inner wall of the collection box. The guide plate slides vertically with the inner wall of the collection box through the ball bearing.

8. The rice chaff removal machine according to claim 7, characterized in that: The position of the exhaust port corresponds to the position of the feeding mechanism.

9. The rice chaff removal machine according to claim 8, characterized in that: The limiting part includes limiting blocks integrally formed at both ends inside the hinge handle, and the included angle between the limiting blocks is 60°.

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