A rice straw screening device

Abstract

The application discloses a rice straw screening device, which comprises a mounting frame, a feeding inlet is installed on one side of the mounting frame, a feeding roller is installed in the feeding inlet, a broken dough separation sieve is installed on the lower side of the feeding roller, a conveying channel is installed on the mounting frame, a rice straw screening mechanism is installed at the input end of the conveying channel, a rice straw screening roller is installed at the transition section of the conveying channel, a rice straw conveying roller is installed on the upper side of the conveying channel, a straw outlet is further arranged at the output end of the conveying channel, a waste outlet is installed at the bottom of the output end of the broken dough separation sieve, a power output mechanism is further installed on one side of the bottom of the mounting frame, and the power output mechanism is connected with the feeding roller, the broken dough separation sieve, the rice straw screening mechanism, the rice straw screening roller and the rice straw conveying roller. The application realizes mechanical screening operation on the mixture of broken dough blocks and rice straw, so that the effects of saving labor, improving the recovery rate of dough blocks and avoiding raw material waste are achieved, and the existing processing requirements are met.

Description

Technical Field

[0001] This invention belongs to the field of straw screening technology, and specifically relates to a straw screening device. Background Technology

[0002] Maotai-flavor liquor, also known as soy sauce aroma liquor, is represented by Maotai, a renowned liquor both domestically and internationally, and belongs to the Daqu (large-grain) liquor category. In the traditional Maotai-flavor liquor brewing process, during the koji-making stage, rice straw is used to separate the koji pieces during fermentation. When the koji is removed from the fermentation chamber, some pieces break into small fragments and become mixed with the straw. Currently, brewing companies mainly rely on manual sorting by workers for this process, which not only results in low koji recovery efficiency but also fails to meet processing requirements, leading to raw material waste and increased production costs. Therefore, a straw sorting device is urgently needed to solve these problems. Summary of the Invention

[0003] To address the problems raised in the background art, the objective of this invention is to provide a straw screening device. To achieve this objective, the technical solution adopted by this invention is as follows:

[0004] A straw screening device includes a mounting frame, a feed inlet on one side of the mounting frame, a feed roller inside the feed inlet, a straw separation screen mounted below the feed roller on the mounting frame, a conveying channel mounted on the top side of the straw separation screen on the mounting frame, a straw screening mechanism mounted at the input end of the conveying channel, a straw screening roller mounted at the transition section of the conveying channel, a straw conveying roller mounted on the upper side of the conveying channel, a usable straw outlet at the output end of the conveying channel, a waste outlet mounted at the bottom of the output end of the straw separation screen on the mounting frame, and a power output mechanism mounted on the bottom side of the mounting frame. The power output mechanism is connected to the feed roller, the straw separation screen, the straw screening mechanism, the straw screening roller, and the straw conveying roller.

[0005] Further specifying, the feed roller includes a roller shaft, a roller frame is mounted on the outer side of the roller shaft, and a plurality of toothed plates are mounted inside the roller frame. These toothed plates are evenly arranged within the roller frame with the roller shaft as the center. Roller bearing seats are mounted on both sides of the roller shaft and are fixedly mounted on a mounting frame. A roller drive gear is also connected to one side of the roller shaft. This structural design facilitates the input of koji grass in preparation for koji grass screening.

[0006] Further specifying, the sifting and separating screen includes two sets of reciprocating interlocking linkages, with several separating screen groups installed between the two sets of reciprocating interlocking linkages. Sifting bearing seats are installed on both sides of each set of reciprocating interlocking linkages, and the sifting bearing seats are fixedly mounted on a mounting frame. A sifting transmission gear is also connected to one side of each reciprocating interlocking linkage. This structural design facilitates the loosening and stretching of the sifting grass.

[0007] Further specifying, the straw screening mechanism includes two sets of fixed rods, each with bearing seats mounted at both ends. The bearing seats are fixedly mounted on a mounting frame. Each fixed rod is connected to several first connecting rods, and the other side of each first connecting rod is connected to a first straw screening hook. A transmission linkage frame is connected to the lower side of each first straw screening hook. A second connecting rod is installed between two adjacent first connecting rods. The other side of each second connecting rod is connected to a second straw screening hook, and the lower side of the second straw screening hook is mounted on the transmission linkage frame. Connecting rod bearing seats are mounted on both sides of the transmission linkage frame, and these bearing seats are fixedly mounted on the mounting frame. A screening transmission gear is also installed on one side of the transmission linkage frame. This structural design facilitates the screening of spun straw.

[0008] Further specifying, the straw screening roller includes a screening shaft, mounting plates on both sides of the screening shaft, and several screening frames installed between the mounting plates. Several straw hooks are screwed onto each screening frame. A screening bearing seat is mounted on the outer side of the mounting plate on the screening shaft, and the screening bearing seat is fixedly mounted on the mounting frame. A screening roller drive gear is also mounted on one side of the screening shaft. Several screening bushings are rotatably mounted on the mounting plates on both sides. The two sides of the screening frames are installed inside the screening bushings. Screening protrusions are mounted on the outer side of the screening bushings, and a screening guide block is connected to the other side of each screening protrusion. A screening cam is also fixedly mounted on the outer side of the mounting plate on the screening shaft. The screening cam has a first screening guide groove, and the screening guide block is slidably disposed within the first screening guide groove. This structural design facilitates further screening of the screened straw.

[0009] Further specifying, the straw conveying roller includes a conveying shaft, side plates mounted on both sides of the conveying shaft, and several crossbeams mounted between the side plates. Several conveying hooks are screwed onto the crossbeams. A conveying bearing seat is mounted on the outer side of the side plates of the conveying shaft, and the conveying bearing seat is fixedly mounted on a mounting frame. A conveying transmission gear is also mounted on one side of the conveying shaft. Several conveying bushings are rotatably mounted on the side plates. The two sides of the crossbeams are installed inside the conveying bushings. A conveying protrusion is mounted on the outer side of the conveying bushing. A conveying guide block is connected to the other side of the conveying protrusion. A conveying cam is also fixedly mounted on the outer side of the side plates of the conveying shaft. The conveying cam has a second screening guide groove, and the conveying guide block is slidably disposed within the second screening guide groove. This structural design effectively conveys the screened straw.

[0010] Further specifying, the power output mechanism includes a drive motor, the power output end of which is connected to a drive wheel. The drive wheel is connected to a drive belt, and the other side of the drive belt is connected to a transmission wheel. The transmission wheel is connected to one of the crushed metal transmission gears, and the crushed metal transmission gear connected to the transmission wheel is connected to a transmission chain. The transmission chain is connected to a roller transmission gear, a screening roller transmission gear, a conveying transmission gear, a screening transmission gear, and the crushed metal transmission gear on the other side. This structural design facilitates the provision of stable power output for use.

[0011] Furthermore, the mounting frame is also equipped with several auxiliary connecting transmission gears, all of which are connected to the transmission chain. A protective housing is installed on the outside of the mounting frame. The drive wheel, drive belt, transmission wheel, crushing transmission gear, transmission chain, roller transmission gear, screening roller transmission gear, conveying transmission gear, screening transmission gear, and auxiliary connecting transmission gears are all housed within the protective housing. This structural design improves the transmission efficiency and provides protection through the protective housing.

[0012] Further defined, the conveying channel includes an inner layer plate and an outer layer plate, with a conveying groove formed between the inner and outer layer plates. The conveying channel has clearance grooves at the corresponding locations of the first straw screening hook, the second straw screening hook, the screening hook, and the conveying hook. The first straw screening hook, the second straw screening hook, the screening hook, and the conveying hook are movably disposed within these clearance grooves. This structural design prevents interference and jamming during movement of the first straw screening hook, the second straw screening hook, the screening hook, and the conveying hook, improving the stability of the movement.

[0013] Furthermore, a control box is also installed on one side of the bottom of the mounting bracket, and the control box is connected to the power output mechanism. This structural design facilitates control operation.

[0014] The beneficial effects of this invention are as follows: This invention uses a feeding drum, a broken koji separation screen, a straw screening mechanism, a straw screening drum, and a straw conveying drum to carry out mechanical and automated feeding, pulling and loosening, screening, and conveying, thereby performing mechanized screening of the mixture of broken koji blocks and straw, achieving the effects of saving labor, increasing the recovery rate of koji blocks, avoiding waste of raw materials, reducing production costs, and meeting existing processing needs. Attached Figure Description

[0015] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0016] Figure 1 This is a schematic diagram of the axial structure of a straw screening device according to an embodiment of the present invention;

[0017] Figure 2This is a schematic cross-sectional view of a straw screening device according to an embodiment of the present invention;

[0018] Figure 3 This is a front structural diagram of a straw screening device according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the feeding drum structure of a straw screening device according to an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the crushed straw separation screen structure of a straw screening device according to an embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the straw screening mechanism of a straw screening device according to an embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of the straw screening drum structure of a straw screening device according to an embodiment of the present invention;

[0023] Figure 8 This is a schematic diagram of the straw conveying roller structure of a straw screening device according to an embodiment of the present invention;

[0024] Figure 9 This is a schematic diagram of the cross-sectional structure of the conveying channel of a straw screening device according to an embodiment of the present invention;

[0025] The symbols for the main components are explained below:

[0026] Mounting frame 1, feed inlet 2;

[0027] Feeding roller 3, roller shaft 301, roller frame 302, gear plate 303, roller bearing seat 304, roller drive gear 305;

[0028] 4. Fragmentation separation screen, 401. Reciprocating interlocking connecting rod assembly, 402. Fragmentation separation screen assembly, 403. Fragmentation bearing seat, 404.

[0029] Conveying channel 5, inner layer plate 501, outer layer plate 502, conveying trough 503;

[0030] The straw screening mechanism includes: 6. Fixed rod 601, bearing seat 602, first connecting rod 603, first straw screening hook 604, transmission connecting rod frame 605, second connecting rod 606, second straw screening hook 607, connecting rod bearing seat 608, and screening transmission gear 609.

[0031] 7. Straw screening drum, 701 screening shaft, 702 mounting plate, 703 screening frame, 704 screening straw hook, 705 screening bearing seat, 706 screening drum transmission gear, 707 screening bushing, 708 screening protrusion, 709 screening guide block, 710 screening cam, 711 first screening guide groove;

[0032] 8. Straw conveying roller, 801. Conveying shaft, 802. Side plate, 803. Crossbeam frame, 804. Conveying straw hook, 805. Conveying bearing seat, 806. Conveying transmission gear, 807. Conveying bushing, 808. Conveying protrusion, 809. Conveying guide block, 810. Conveying cam, 811. Second screening guide groove;

[0033] 9 can be exported as grass, and 10 can be exported as waste.

[0034] Power output mechanism 11, drive motor 1101, drive wheel 1102, transmission wheel 1103

[0035] Auxiliary connecting transmission gear 12, protective housing 13, clearance groove 14, control box 15. Detailed Implementation

[0036] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] Example 1, such as Figure 1 and Figure 2 As shown, a straw screening device includes a feed inlet 2 installed on one side of a mounting frame 1, a feed roller 3 installed inside the feed inlet 2, a straw separation screen 4 installed below the feed roller 3 on the mounting frame 1, a conveying channel 5 installed on the top side of the straw separation screen 4 on the mounting frame 1, a straw screening mechanism 6 installed at the input end of the conveying channel 5, a straw screening roller 7 installed at the transition section of the conveying channel 5, a straw conveying roller 8 installed on the upper side of the conveying channel 5, a usable straw outlet 9 at the output end of the conveying channel 5, a waste outlet 10 installed at the bottom of the output end of the straw separation screen 4 on the mounting frame 1, and a power output mechanism 11 installed on the bottom side of the mounting frame 1. The power output mechanism 11 is connected to the feed roller 3, the straw separation screen 4, the straw screening mechanism 6, the straw screening roller 7, and the straw conveying roller 8.

[0038] In this embodiment, during use, the power output mechanism 11 is activated, causing it to drive the feeding roller 3, the broken straw separation screen 4, the straw screening mechanism 6, the straw screening roller 7, and the straw conveying roller 8 to move. Then, the straw to be screened is placed into the feeding inlet 2, and the feeding speed is controlled by the feeding roller 3, feeding the straw into the broken straw separation screen 4 for screening. The fed straw enters the broken straw separation screen 4, where it is pulled and loosened, effectively shaking off and combing the straw, and conveying it. After the loosened koji grass is screened by the koji separation screen 4, it is conveyed to the straw screening mechanism 6. The straw screening mechanism 6 screens the koji grass. The screened straw enters the conveying channel 5, while the unusable straw enters the waste outlet 10 through the straw screening mechanism 6. The usable straw is selected by the straw screening mechanism 6 and enters the straw screening drum 7. The straw is screened further through the straw screening drum 7 to ensure more accurate screening. The usable straw is then conveyed to the straw screening drum 7 and output to the usable straw outlet 9. The straw screening work is then completed by discharging the usable straw.

[0039] Example 2, as Figure 4 As shown, this embodiment adds the following structure based on embodiment 1: the feed roller 3 includes a roller shaft 301, a roller frame 302 is installed on the outside of the roller shaft 301, a plurality of toothed plates 303 are installed inside the roller frame 302, the plurality of toothed plates 303 are evenly arranged in the roller frame 302 with the roller shaft 301 as the center, roller bearing seats 304 are installed on both sides of the roller shaft 301, the roller bearing seats 304 are fixedly installed on the mounting frame 1, and a roller drive gear 305 is also connected to one side of the roller shaft 301.

[0040] In this embodiment, during use, the roller shaft 301 is driven to rotate within the roller bearing seat 304 by the roller transmission gear 305, which in turn drives the roller frame 302. The roller frame 302 then drives the toothed plate 303 to rotate, allowing the toothed plate 303 to input the chopped grass in the feed inlet 2 into the crushed grass separation screen 4.

[0041] Example 3, as Figure 5 As shown, this embodiment adds the following structure based on embodiment 1: the broken-color separation screen 4 includes two sets of reciprocating staggered connecting rods 401, several separation screen groups 402 are installed between the two sets of reciprocating staggered connecting rods 401, broken-color bearing seats 403 are installed on both sides of the two sets of reciprocating staggered connecting rods 401, the broken-color bearing seats 403 are fixedly installed on the mounting frame 1, and a broken-color transmission gear 404 is also connected to one side of the reciprocating staggered connecting rods 401.

[0042] In this embodiment, during use, the crushed grass transmission gear 404 drives the respective reciprocating interlocking linkage group 401 to rotate within the crushed grass bearing seat 403, causing the reciprocating interlocking linkage group 401 to drive the separation screen group 402 to perform cyclic reciprocating interlocking motion, which pulls and loosens the koji grass, thereby achieving the functions of shaking off the koji grass mixed in with the koji grass, loosening the koji grass, and conveying the koji grass.

[0043] Example 4, as Figure 6 As shown, this embodiment adds the following structure based on embodiment 1: the straw screening mechanism 6 includes two sets of fixed rods 601, with bearing seats 602 installed at both ends of the two sets of fixed rods 601. The bearing seats 602 are fixedly installed on the mounting frame 1. The fixed rods 601 are connected to a plurality of first connecting rods 603. The other side of the plurality of first connecting rods 603 is connected to a first straw screening hook 604. The lower side of the first straw screening hook 604 is connected to a transmission connecting rod frame 605. A second connecting rod 606 is installed between two adjacent first connecting rods 603 on the fixed rods 601. The other side of the second connecting rod 606 is connected to a second straw screening hook 607. The lower side of the second straw screening hook 607 is installed on the transmission connecting rod frame 605. Connecting rod bearing seats 608 are installed on both sides of the transmission connecting rod frame 605. The connecting rod bearing seats 608 are fixedly installed on the mounting frame 1. A screening transmission gear 609 is also installed on one side of the transmission connecting rod frame 605.

[0044] In this embodiment, during use, the screening transmission gear 609 drives the transmission linkage frame 605 to rotate along the connecting rod bearing seat 608, causing the transmission linkage frame 605 to drive the first straw screening hook 604 and the second straw screening hook 607 on both sides to move. Under the effect of the first connecting rod 603 and the second connecting rod 606, the first straw screening hook 604 and the second straw screening hook 607 simulate the action of manually screening straw to screen the straw. The gap between the first connecting rod 603 and the second connecting rod 606 can also be adjusted to select straw of different lengths to screen. The usable straw is longer and enters the conveying channel 5 after screening, while the unusable straw is shorter and flows into the waste outlet 10 from the gap between the first straw screening hook 604 and the second straw screening hook 607.

[0045] Example 5, as Figure 7As shown, this embodiment adds the following structure to embodiment 1: the straw screening roller 7 includes a screening shaft 701, mounting plates 702 are installed on both sides of the screening shaft 701, and several screening frames 703 are installed between the two mounting plates 702. Several screening straw hooks 704 are installed on the screening frames 703 by screws. A screening bearing seat 705 is installed on the outside of the mounting plate 702 on the screening shaft 701. The screening bearing seat 705 is fixedly installed on the mounting frame 1. A screening roller transmission is also installed on one side of the screening shaft 701. The drive gear 706 and the mounting plates 702 on both sides are also rotatably mounted with a number of screening bushings 707. The two sides of the screening frame 703 are installed in the screening bushings 707. Screening protrusions 708 are installed on the outer side of the screening bushings 707. Screening guide blocks 709 are connected to the other side of the screening protrusions 708. Screening cams 710 are also fixedly installed on the outer side of the mounting plate 702 on the screening shaft 701. The screening cams 710 are provided with a first screening guide groove 711. Screening guide blocks 709 are slidably disposed in the first screening guide groove 711.

[0046] In this embodiment, during use, the screening shaft 701 is driven to rotate on the screening bearing seat 705 by the screening roller transmission gear 706. The screening shaft 701 drives the mounting plates 702 on both sides, the mounting plates 702 drive the screening bushing 707, the screening bushing 707 drives the inner screening frame 703, the screening frame 703 drives the screening hook 704 to screen and convey the straw. At the same time, the screening bushing 707 drives the outer screening protrusion 708, the screening protrusion 708 drives the screening guide block 709 to slide along the first screening guide groove 711 in the screening cam 710. This causes the screening frame 703 to drive the screening hook 704 to rotate to a specific position, extending and retracting the screening hook 704. Retracting the screening hook 704 is to cooperate with the stroke of the first screening guide groove 711 on the screening cam 710 after completing the screening and conveying function, and to retract the screening hook 704 at a specific angle to facilitate screening and straw removal. At the same time, retracting the screening hook 704 can also effectively reduce the space occupied by the straw screening roller 7.

[0047] Example 6, as Figure 8As shown, this embodiment adds the following structure based on embodiment 1: the straw conveying roller 8 includes a conveying shaft 801, side plates 802 are installed on both sides of the conveying shaft 801, several crossbeams 803 are installed between the two side plates 802, several straw conveying hooks 804 are installed on the crossbeams 803 by screws, a conveying bearing seat 805 is installed on the outside of the side plates 802 on the conveying shaft 801, the conveying bearing seat 805 is fixedly installed on the mounting frame 1, and a conveying transmission gear is also installed on one side of the conveying shaft 801. The wheel 806 has several conveying bushings 807 rotatably mounted on the two side plates 802. The two sides of the crossbeam frame 803 are installed inside the conveying bushings 807. The outer side of the conveying bushings 807 is equipped with a conveying protrusion 808. The other side of the conveying protrusion 808 is connected to a conveying guide block 809. The conveying shaft 801 is also fixedly mounted with a conveying cam 810 on the outer side of the side plate 802. The conveying cam 810 is provided with a second screening guide groove 811. The conveying guide block 809 is slidably disposed in the second screening guide groove 811.

[0048] In this embodiment, during use, the conveying transmission gear 806 drives the conveying shaft 801 to rotate within the conveying bearing seat 805. This causes the conveying shaft 801 to drive the side plates 802 on both sides, which in turn drive the conveying bushing 807. The conveying bushing 807 then drives the inner crossbeam frame 803, which in turn drives the conveying straw hook 804 to convey the straw. Simultaneously, the conveying bushing 807 drives the outer conveying protrusion 808, which in turn drives the conveying guide block 809 along the conveying cam 810. The second screening guide groove 811 inside slides, which causes the crossbeam frame 803 to drive the conveying straw hook 804 to rotate to a specific position, extending and retracting the conveying straw hook 804. The retraction of the conveying straw hook 804 is to cooperate with the stroke of the second screening guide groove 811 on the conveying cam 810 after the straw conveying function is completed, and to retract the conveying straw hook 804 at a specific angle to facilitate straw removal. At the same time, the retraction of the conveying straw hook 804 can also effectively reduce the space occupied by the straw conveying roller 8, and the output straw is discharged from the straw outlet 9.

[0049] Example 7, as Figure 3 and Figure 5 As shown, this embodiment adds the following structure based on embodiment 1: the power output mechanism 11 includes a drive motor 1101, the power output end of the drive motor 1101 is connected to a drive wheel 1102, the drive wheel 1102 is connected to a drive belt, the other side of the drive belt is connected to a transmission wheel 1103, the transmission wheel 1103 is connected to one of the crushing transmission gears 404, the crushing transmission gear 404 connected to the transmission wheel 1103 is connected to a transmission chain, the transmission chain is connected to the roller transmission gear 305, the screening roller transmission gear 706, the conveying transmission gear 806, the screening transmission gear 609 and the crushing transmission gear 404 on the other side.

[0050] In this embodiment, during use, the drive motor 1101 is started, causing the drive motor 1101 to drive the drive wheel 1102, which in turn drives the drive belt. The drive belt drives the transmission wheel 1103, which in turn drives the crushed transmission gear 404 on one side to rotate. This causes the crushed transmission gear 404 to drive the transmission chain, which in turn drives the roller transmission gear 305, the screening roller transmission gear 706, the conveying transmission gear 806, the screening transmission gear 609, and the crushed transmission gear 404 on the other side to rotate.

[0051] Example 8, as Figure 1 and Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: several auxiliary connecting transmission gears 12 are also installed on the mounting frame 1. The several auxiliary connecting transmission gears 12 are all connected to the transmission chain. A protective shell 13 is installed on the outside of the mounting frame 1. The drive wheel 1102, drive belt, transmission wheel 1103, crushing transmission gear 404, transmission chain, roller transmission gear 305, screening roller transmission gear 706, conveying transmission gear 806, screening transmission gear 609, and auxiliary connecting transmission gears 12 are all set inside the protective shell 13.

[0052] In this embodiment, during use, the transmission effect of the transmission chain is improved by the auxiliary connecting transmission gear 12, and the protective shell 13 protects the drive wheel 1102, drive belt, transmission wheel 1103, crushing transmission gear 404, transmission chain, roller transmission gear 305, screening roller transmission gear 706, conveying transmission gear 806, screening transmission gear 609 and auxiliary connecting transmission gear 12, thus extending their service life.

[0053] Example 9, as Figure 9 As shown, this embodiment adds the following structure based on embodiment 1: the conveying channel 5 includes an inner layer plate 501 and an outer layer plate 502, and a conveying groove 503 is formed between the inner layer plate 501 and the outer layer plate 502. The conveying channel 5 is provided with a clearance groove 14 at the corresponding positions of the first straw screening hook 604, the second straw screening hook 607, the screening straw hook 704 and the conveying straw hook 804. The first straw screening hook 604, the second straw screening hook 607, the screening straw hook 704 and the conveying straw hook 804 are movably arranged in the clearance groove 14.

[0054] In this embodiment, during use, the clearance groove 14 has the effect of limiting the movement of the first straw screening hook 604, the second straw screening hook 607, the screening straw hook 704 and the conveying straw hook 804, so that interference and jamming will not occur during movement, and the effect of stable movement will be improved.

[0055] Example 10, as shown in 1, adds the following structure to Example 1: a control box 15 is also installed on one side of the bottom of the mounting bracket 1, and the control box 15 is connected to the power output mechanism 11.

[0056] In this embodiment, during use, the output power of the power output mechanism 11 can be controlled through the control box 15 to facilitate control of the subsequent working speed.

[0057] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A straw sieving device, characterized in that: The system includes a mounting frame (1), on one side of which is a feed inlet (2), and a feed roller (3) is installed inside the feed inlet (2). A crushed grain separating screen (4) is installed on the underside of the feed roller (3) on the mounting frame (1). A conveying channel (5) is installed on the top side of the crushed grain separating screen (4) on the mounting frame (1). A straw screening mechanism (6) is installed at the input end of the conveying channel (5), and a straw screening roller (7) is installed at the transition section of the conveying channel (5). The upper side of the conveying channel (5) is equipped with a straw conveying roller (8), and the output end of the conveying channel (5) is also provided with a usable straw outlet (9). The mounting frame (1) is equipped with a waste outlet (10) at the bottom of the output end of the crushed and separated screen (4). The bottom side of the mounting frame (1) is also equipped with a power output mechanism (11). The power output mechanism (11) is connected to the feeding roller (3), the crushed and separated screen (4), the straw screening mechanism (6), the straw screening roller (7), and the straw conveying roller (8). The broken-type separating screen (4) includes two sets of reciprocating interlocking connecting rods (401), and several separating screens (402) are installed between the two sets of reciprocating interlocking connecting rods (401). Broken-type bearing seats (403) are installed on both sides of the two sets of reciprocating interlocking connecting rods (401). The broken-type bearing seats (403) are fixedly installed on the mounting frame (1). A broken-type transmission gear (404) is also connected to one side of the reciprocating interlocking connecting rods (401). The straw screening mechanism (6) includes two sets of fixed rods (601). Bearing seats (602) are installed at both ends of the two sets of fixed rods (601). The bearing seats (602) are fixedly installed on the mounting frame (1). Several first connecting rods (603) are connected to the fixed rods (601). A first straw screening hook (604) is connected to the other side of the several first connecting rods (603). A transmission connecting rod frame (605) is connected to the lower side of the first straw screening hook (604). The fixed rods (601) are located at two... A second connecting rod (606) is installed between adjacent first connecting rods (603). A second straw screening hook (607) is connected to the other side of the second connecting rod (606). The lower side of the second straw screening hook (607) is installed on the transmission connecting rod frame (605). Connecting rod bearing seats (608) are installed on both sides of the transmission connecting rod frame (605). The connecting rod bearing seats (608) are fixedly installed on the mounting frame (1). A screening transmission gear (609) is also installed on one side of the transmission connecting rod frame (605).

2. The straw screening device according to claim 1, characterized in that: The feed roller (3) includes a roller shaft (301), a roller frame (302) is installed on the outside of the roller shaft (301), and a plurality of toothed plates (303) are installed inside the roller frame (302). The plurality of toothed plates (303) are evenly arranged inside the roller frame (302) with the roller shaft (301) as the center. Roller bearing seats (304) are installed on both sides of the roller shaft (301). The roller bearing seats (304) are fixedly installed on the mounting frame (1). A roller drive gear (305) is also connected to one side of the roller shaft (301).

3. The straw screening device according to claim 2, characterized in that: The straw screening roller (7) includes a screening shaft (701), with mounting plates (702) installed on both sides of the screening shaft (701). Several screening frames (703) are installed between the mounting plates (702) on both sides. Several screening straw hooks (704) are installed on the screening frames (703) by screws. A screening bearing seat (705) is installed on the outside of the mounting plate (702) of the screening shaft (701). The screening bearing seat (705) is fixedly installed on the mounting frame (1). A screening roller drive gear (706) is also installed on one side of the screening shaft (701). The mounting plates (702) on both sides are mounted on the mounting frame (1). The mounting plate (702) is also rotatably mounted with several screening bushings (707). The two sides of the screening frame (703) are installed in the screening bushings (707). Screening protrusions (708) are installed on the outer side of the screening bushings (707). Screening guide blocks (709) are connected to the other side of the screening protrusions (708). Screening cams (710) are also fixedly mounted on the outer side of the mounting plate (702) of the screening shaft (701). The screening cams (710) are provided with a first screening guide groove (711). The screening guide blocks (709) are slidably disposed in the first screening guide groove (711).

4. The straw screening device according to claim 3, characterized in that: The straw conveying roller (8) includes a conveying shaft (801), side plates (802) are installed on both sides of the conveying shaft (801), and several crossbeams (803) are installed between the two side plates (802). Several straw conveying hooks (804) are installed on the crossbeams (803) by screws. A conveying bearing seat (805) is installed on the outside of the side plates (802) of the conveying shaft (801). The conveying bearing seat (805) is fixedly installed on the mounting frame (1). A conveying transmission gear (806) is also installed on one side of the conveying shaft (801). The two side plates (802) 802) is also rotatably mounted with several conveying bushings (807), the two sides of the crossbeam frame (803) are installed in the conveying bushings (807), the outer side of the conveying bushings (807) is equipped with conveying protrusions (808), the other side of the conveying protrusions (808) is connected to a conveying guide block (809), the conveying shaft (801) is also fixedly mounted with a conveying cam (810) on the outer side of the side plate (802), the conveying cam (810) is provided with a second screening guide groove (811), and the conveying guide block (809) is slidably disposed in the second screening guide groove (811).

5. A straw screening device according to claim 4, characterized in that: The power output mechanism (11) includes a drive motor (1101), the power output end of the drive motor (1101) is connected to a drive wheel (1102), the drive wheel (1102) is connected to a drive belt, the other side of the drive belt is connected to a transmission wheel (1103), the transmission wheel (1103) is connected to one of the broken transmission gears (404), the broken transmission gear (404) connected to the transmission wheel (1103) is connected to a transmission chain, the transmission chain is connected to the roller transmission gear (305), the screening roller transmission gear (706), the conveying transmission gear (806), the screening transmission gear (609) and the broken transmission gear (404) on the other side.

6. The straw screening device according to claim 5, characterized in that: The mounting frame (1) is also equipped with a number of auxiliary connecting transmission gears (12), and the auxiliary connecting transmission gears (12) are all connected to the transmission chain. A protective shell (13) is installed on the outside of the mounting frame (1). The drive wheel (1102), drive belt, transmission wheel (1103), crushing transmission gear (404), transmission chain, roller transmission gear (305), screening roller transmission gear (706), conveying transmission gear (806), screening transmission gear (609) and auxiliary connecting transmission gears (12) are all set inside the protective shell (13).

7. A straw screening device according to claim 6, characterized in that: The conveying channel (5) includes an inner plate (501) and an outer plate (502). A conveying groove (503) is formed between the inner plate (501) and the outer plate (502). The conveying channel (5) is provided with a clearance groove (14) at the corresponding first straw screening hook (604), second straw screening hook (607), screening straw hook (704) and conveying straw hook (804). The first straw screening hook (604), second straw screening hook (607), screening straw hook (704) and conveying straw hook (804) are movably arranged in the clearance groove (14).

8. A straw screening device according to claim 7, characterized in that: A control box (15) is also installed on one side of the bottom of the mounting bracket (1), and the control box (15) is connected to the power output mechanism (11).

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