Rice straw smashing and returning method and device

Abstract

The invention discloses a rice straw smashing and returning method and device, and relates to the technical field of rice straw smashing and returning, the rice straw smashing and returning device comprises a mounting frame, the upper surface of the mounting frame is fixedly connected with a mounting buckle, the bottom surface of the mounting frame is fixedly connected with two connecting frames, a sorting mechanism is arranged above the two connecting frames jointly, and the sorting mechanism comprises a conveying belt; the conveying belt is arranged between the two connecting frames, the outer surface of the conveying belt is fixedly connected with a plurality of collecting rods, the interiors of the two connecting frames are jointly and rotationally connected with a driving shaft, and the outer surface of the driving shaft makes contact with the inner wall of the conveying belt. Straw on the ground of a rice field can be separated from straw carrying rice roots in soil, straw roots and straw bodies are smashed respectively, the straw can be effectively prevented from being excessively wound together, the straw smashing effect is guaranteed, the smashed straw is not prone to being accumulated into blocks in the soil, and the mixing uniformity of the smashed straw and the soil is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of rice straw crushing and returning to the field, and specifically relates to a method and device for crushing and returning rice straw to the field. Background Art

[0002] A large amount of straw is generated during the harvesting of rice. Since the direct discarding of straw in the paddy field has a long decay period, which affects the planting of the next season of rice or other crops, it is necessary to crush and return the rice straw to the field. Scientific experiments show that the straw returning of crops such as rice, wheat, and corn can not only increase the organic matter content of the soil, increase fertilizer efficiency, and improve the soil structure, but also reduce the labor intensity and effectively avoid the environmental pollution caused by straw burning. The current method for crushing and returning rice straw to the field is to drive a straw crushing device by a tractor, and use a gearbox to transmit the power transmitted by the tractor to the straw crushing device step by step through a transmission shaft and a pulley, and achieve the purpose of crushing rice straw through the straw crushing device.

[0003] However, when the existing rice straw crushing device is in use, it can only crush the surface straw and the straw carrying rice roots inside the soil together, resulting in excessive entanglement of the straw, affecting the uniformity of straw returning to the field, and at the same time, the straw crushing effect is not good, and it cannot more efficiently crush the rice straw into small pieces and mix them into the soil, resulting in the problem that the rice straw is easily piled up in the soil in blocks during the crushing and returning of rice straw to the field, affecting subsequent sowing.

[0004] Combining the above problems, we will find that it is very difficult for the existing rice straw crushing and returning device to avoid the above-mentioned problems simultaneously during use, and even if it can be solved, it needs to be solved by cooperating with external tools, thus unable to achieve the desired effect. Therefore, we propose a method and device for crushing and returning rice straw to the field. Summary of the Invention

[0005] The purpose of the present invention is to provide a method and device for crushing and returning rice straw to the field to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solutions: A method and device for pulverizing and returning rice straw to the field, including a mounting frame, on the upper surface of the mounting frame is fixedly connected with a mounting buckle, on the bottom surface of the mounting frame are fixedly connected with two connecting frames, above the two connecting frames is jointly provided with a sorting mechanism, the sorting mechanism includes a conveyor belt, the conveyor belt is arranged between the two connecting frames, on the outer surface of the conveyor belt are fixedly connected with a number of collecting rods, inside the two connecting frames is jointly rotatably connected with a driving shaft, the outer surface of the driving shaft is in contact with the inner wall of the conveyor belt, one end of the driving shaft is fixedly connected with a first gear, on the front surface of one of the connecting frames is rotatably connected with a first pulley, on the outer surface of the first pulley is fixedly connected with a second gear, the outer surface of the second gear is meshed with the outer surface of the first gear, and the outer surface of the first pulley is drivingly connected with a first belt;

[0007] On the upper surface of the sorting mechanism is fixedly installed a pulverizing mechanism, and below the mounting frame is provided a crushing and mixing mechanism.

[0008] Preferably, on the upper surfaces of the two connecting frames are both fixedly connected with first reinforcing ribs, and the other ends of the two first reinforcing ribs are both fixedly connected with the right side surface of the mounting frame.

[0009] Preferably, inside the two connecting frames is jointly rotatably connected with a driven shaft, and the outer surface of the driven shaft is in contact with the inner wall of the conveyor belt.

[0010] Preferably, on the bottom surfaces of the two connecting frames are both fixedly connected with auxiliary frames, and on the bottom surfaces of the two auxiliary frames are both rotatably connected with two rollers.

[0011] Preferably, the pulverizing mechanism includes a protective cover, the upper surfaces of the two connecting frames are both fixedly connected with the bottom surface of the protective cover, on the left side surface of the protective cover is fixedly connected with a collecting frame, inside the collecting frame is rotatably connected with an auxiliary shaft, on the outer surface of the auxiliary shaft are fixedly connected with a number of auxiliary rods, one end of the auxiliary shaft is fixedly connected with a third gear, the outer surface of the third gear is meshed with the outer surface of the first gear, on the inner bottom wall of the protective cover are provided a number of auxiliary grooves, on the right side surface of the protective cover is fixedly communicated with three discharge covers, inside the protective cover are rotatably connected with four rotating rods, on the outer surfaces of the four rotating rods are all fixedly connected with a number of pulverizing knives, one end of each of the four rotating rods is fixedly connected with a fourth gear, the outer surfaces of the upper and lower adjacent fourth gears are all meshed with each other, on the front surfaces of two of the fourth gears are both fixedly connected with second pulleys, the outer surfaces of the two second pulleys are jointly drivingly connected with a second belt, and the outer surface of one of the second pulleys is drivingly connected with a third belt.

[0012] Preferably, a maintenance door is movably hinged to the upper surface of the protective cover through a hinge, and a handle is fixedly connected to the upper surface of the maintenance door.

[0013] Preferably, the crushing and mixing mechanism includes a fixed frame. The bottom surfaces of the two connecting frames are both fixedly connected to the upper surface of the fixed frame. A connecting shaft is rotatably connected inside the fixed frame. A plurality of crushing knives are fixedly connected to the outer surface of the connecting shaft. One end of the connecting shaft is fixedly connected to a third belt pulley. The inner walls of the first belt and the third belt are both drivingly connected to the outer surface of the third belt pulley. The outer surface of the connecting shaft is drivingly connected to a gear commutator. The upper surface of the gear commutator penetrates above the fixed frame. Four support frames are fixedly connected to the upper surface of the fixed frame. The bottom surfaces of the four support frames are jointly fixedly connected to a connecting plate. Four fixing seats are fixedly connected to the bottom surface of the connecting plate. A plowshare is fixedly connected to the front surface of each fixing seat.

[0014] Preferably, second reinforcing ribs are fixedly connected to the front and back surfaces of the gear commutator, and the other ends of the two second reinforcing ribs are respectively fixedly connected to the mutually adjacent side surfaces of the two connecting frames.

[0015] Preferably, a fixed shaft is fixedly connected to the input end of the gear commutator, and a fixed buckle is fixedly connected to the left end of the fixed shaft.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. By arranging the connecting frame in cooperation with the driving shaft, the present invention can drive the second gear to rotate counterclockwise by using the first belt in cooperation with the first belt pulley, and then through the meshing of the second gear and the first gear, the driving shaft and the conveyor belt can be driven to rotate clockwise by using the first gear. At this time, through the collecting rods on the conveyor belt and the inclination angle of the conveyor belt itself, the straw on the paddy field ground can be separated from the straw carrying rice roots inside the soil, so that the straw roots and the straw stems are sorted and separated, and the straw roots and the straw stems are respectively crushed, thereby effectively preventing the straw from being overly entangled together, ensuring the crushing effect of the straw, and being able to more efficiently crush the rice straw into small pieces, so that the straw is not easy to accumulate into blocks in the soil, and ensuring the mixing uniformity of the crushed straw and the soil.

[0018] 2. In the present invention, by setting the engagement between the third gear and the first gear, as the first gear rotates clockwise, it can drive the third gear and the auxiliary shaft to rotate counterclockwise. Then, in cooperation with the collection rack, the auxiliary rod can be used to send the straw into the protective cover. At this time, through the cooperation of the third belt, the second belt and the second pulley, the two upper rotating rods can be driven to rotate counterclockwise, and then through the meshing of the fourth gears, the two lower rotating rods can be driven to rotate clockwise. Furthermore, in cooperation with the crushing knives, the rice straw entering the protective cover can be crushed and discharged outward through the discharge cover, playing a role in making the straw rod body of the rice straw that is easy to crush can be quickly crushed into fine slag, ensuring that it will not affect the subsequent sowing when the straw is pulverized and returned to the field.

[0019] 3. In the present invention, by setting the support frame in cooperation with the connecting plate and the fixed seat, the plowshare can turn over the soil in the paddy field, so that the rice root straw in the paddy field soil can be smoothly exposed. Then, through the gear commutator, the power of the tractor can be transmitted to the connecting shaft, and the connecting shaft drives the crushing knives to quickly crush the turned soil and the rice root straw in the soil, so that the rice root straw can also be effectively crushed without excessive accumulation, playing a role in enabling the rice straw roots and the straw rod body to be crushed separately, preventing the direct mixing of the straw roots and the straw rod body during crushing, resulting in poor straw crushing effect and easy accumulation in the soil, and affecting the effect of pulverizing and returning the rice straw to the field. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a schematic diagram of the sectional structure of the conveyor belt of the present invention;

[0022] Figure 3 is a schematic diagram of the structure of the inspection door of the present invention;

[0023] Figure 4 is a schematic diagram of the sectional structure of the collection rack of the present invention;

[0024] Figure 5 is a schematic diagram of the sectional structure of the protective cover of the present invention;

[0025] Figure 6 is the present invention Figure 5 is an enlarged schematic diagram of the structure at A in;

[0026] Figure 7 is a schematic diagram of the structure of the mounting rack of the present invention;

[0027] Figure 8 is a schematic diagram of the sectional structure of the fixing rack of the present invention.

[0028] In the figure:

[0029] 1. Mounting frame;

[0030] 2. Mounting buckle;

[0031] 3. Connecting frame;

[0032] 4. Sorting mechanism; 401. Conveyor belt; 402. Collection rod; 403. Driving shaft; 404. First gear; 405. First pulley; 406. Second gear; 407. First belt; 408. First reinforcing rib; 409. Driven shaft; 410. Auxiliary frame; 411. Roller;

[0033] 5. Crushing mechanism; 501. Protective cover; 502. Collection rack; 503. Auxiliary shaft; 504. Auxiliary rod; 505. Third gear; 506. Auxiliary groove; 507. Discharge cover; 508. Rotating rod; 509. Crushing knife; 510. Fourth gear; 511. Second pulley; 512. Second belt; 513. Third belt; 514. Maintenance door; 515. Handle;

[0034] 6. Crushing and mixing mechanism; 601. Fixed frame; 602. Connecting shaft; 603. Crushing knife; 604. Third pulley; 605. Gear commutator; 606. Support frame; 607. Connecting plate; 608. Fixed seat; 609. Plowshare; 610. Second reinforcing rib; 611. Fixed shaft; 612. Fixed buckle. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] Embodiment 1: Please refer to Figures 1-8, the present invention provides a technical solution: a method and device for pulverizing and returning rice straw to the field, including a mounting frame 1. A mounting buckle 2 is fixedly connected to the upper surface of the mounting frame 1. Two connecting frames 3 are fixedly connected to the bottom surface of the mounting frame 1. Above the two connecting frames 3, a sorting mechanism 4 is provided. The sorting mechanism 4 includes a conveyor belt 401. The conveyor belt 401 is arranged between the two connecting frames 3. A number of collecting rods 402 are fixedly connected to the outer surface of the conveyor belt 401. The two connecting frames 3 jointly rotatably connect a driving shaft 403 inside. The outer surface of the driving shaft 403 is in contact with the inner wall of the conveyor belt 401. One end of the driving shaft 403 is fixedly connected to a first gear 404. A first belt pulley 405 is rotatably connected to the front surface of one of the connecting frames 3. A second gear 406 is fixedly connected to the outer surface of the first belt pulley 405. The outer surface of the second gear 406 is meshed with the outer surface of the first gear 404. The outer surface of the first belt pulley 405 is drivingly connected to a first belt 407.

[0037] First reinforcing ribs 408 are fixedly connected to the upper surfaces of the two connecting frames 3. The other ends of the two first reinforcing ribs 408 are fixedly connected to the right side surface of the mounting frame 1. The first reinforcing ribs 408 can increase the connection strength between the connecting frame 3 and the mounting frame 1, making the mounting frame 1 not easily loosen and improving the bearing strength of the mounting frame 1;

[0038] A driven shaft 409 is jointly rotatably connected to the inside of the two connecting frames 3. The outer surface of the driven shaft 409 is in contact with the inner wall of the conveyor belt 401. The driven shaft 409 can, without affecting the rotation of the conveyor belt 401, make the conveyor belt 401 cooperate with the connecting frame 3 to maintain a moving inclination angle, ensuring the normal use of the conveyor belt 401;

[0039] Auxiliary frames 410 are fixedly connected to the bottom surfaces of the two connecting frames 3. Two rollers 411 are rotatably connected to the bottom surfaces of the two auxiliary frames 410. The auxiliary frames 410 cooperating with the rollers 411 can increase the smoothness when the device is used, reduce the friction of the device on the paddy field, and at the same time limit the position of the device on the paddy field, ensuring the stability when the device is used.

[0040] The specific implementation manner of this embodiment is: The connecting frame 3 cooperating with the driving shaft 403 can drive the second gear 406 to rotate counterclockwise by means of the first belt 407 cooperating with the first belt pulley 405. Then, through the meshing of the second gear 406 and the first gear 404, the first gear 404 can drive the driving shaft 403 and the conveyor belt 401 to rotate clockwise. At this time, through the collecting rods 402 on the conveyor belt 401 and the inclination angle of the conveyor belt 401 itself, the straw on the paddy field ground can be separated from the straw carrying rice roots inside the soil, enabling the straw roots and the straw stems to be sorted and separated, so that the straw roots and the straw stems are respectively pulverized, thereby effectively preventing the straw from being overly entangled together and ensuring the pulverizing effect of the straw.

[0041] Example 2: Please refer to Figures 3-6 , the present invention provides a technical solution: a method and device for pulverizing rice straw and returning it to the field. The present invention makes corresponding improvements to the technical problems mentioned in the background art. A pulverizing mechanism 5 is fixedly installed on the upper surface of the sorting mechanism 4.

[0042] As a further limitation of the pulverizing mechanism 5 of the present invention, the pulverizing mechanism 5 includes a protective cover 501. The upper surfaces of both connecting frames 3 are fixedly connected to the bottom surface of the protective cover 501. A collecting frame 502 is fixedly connected to the left side surface of the protective cover 501. An auxiliary shaft 503 is rotatably connected inside the collecting frame 502. A plurality of auxiliary rods 504 are fixedly connected to the outer surface of the auxiliary shaft 503. One end of the auxiliary shaft 503 is fixedly connected to a third gear 505. The outer surface of the third gear 505 is meshed with the outer surface of the first gear 404. A plurality of auxiliary grooves 506 are formed on the inner bottom wall of the protective cover 501. Three discharge covers 507 are fixedly communicated with the right side surface of the protective cover 501. Four rotating rods 508 are rotatably connected inside the protective cover 501. A plurality of pulverizing knives 509 are fixedly connected to the outer surfaces of the four rotating rods 508. One end of each of the four rotating rods 508 is fixedly connected to a fourth gear 510. The outer surfaces of the upper and lower adjacent fourth gears 510 are mutually meshed. The front surfaces of two of the fourth gears 510 are fixedly connected to second pulleys 511. A second belt 512 is commonly driven on the outer surfaces of the two second pulleys 511. A third belt 513 is driven on the outer surface of one of the second pulleys 511.

[0043] The upper surface of the protective cover 501 is movably hinged with a maintenance door 514 through a hinge. A handle 515 is fixedly connected to the upper surface of the maintenance door 514. Manually pulling the handle 515 can open the maintenance door 514, thereby facilitating the user to repair the facilities inside the protective cover 501 and increasing the maintenance convenience of the device.

[0044] The specific implementation of this embodiment is as follows: Through the meshing of the third gear 505 and the first gear 404, as the first gear 404 rotates clockwise, it can drive the third gear 505 and the auxiliary shaft 503 to rotate counterclockwise. Then, in cooperation with the collecting frame 502, the auxiliary rods 504 can be used to send the straw into the protective cover 501. At this time, through the cooperation of the third belt 513, the second belt 512 and the second pulleys 511, the upper two rotating rods 508 can be driven to rotate counterclockwise. Then, through the mutual meshing of the fourth gears 510, the lower two rotating rods 508 can be driven to rotate clockwise. Further, in cooperation with the pulverizing knives 509, the rice straw entering the protective cover 501 can be pulverized and discharged out through the discharge covers 507, so that the straw rod bodies that are easy to pulverize can be quickly pulverized into fine fragments, ensuring that the subsequent sowing will not be affected when the straw is pulverized and returned to the field.

[0045] Example 3: Please refer to Figure 7 and Figure 8 , the present invention provides a technical solution: a method and device for pulverizing and returning rice straw to the field. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. A crushing and mixing mechanism 6 is arranged below the mounting frame 1.

[0046] As a further limitation of the crushing and mixing mechanism 6 of the present invention, the crushing and mixing mechanism 6 includes a fixed frame 601. The bottom surfaces of the two connecting frames 3 are fixedly connected to the upper surface of the fixed frame 601. A connecting shaft 602 is rotatably connected inside the fixed frame 601. A plurality of crushing knives 603 are fixedly connected to the outer surface of the connecting shaft 602. One end of the connecting shaft 602 is fixedly connected to a third belt pulley 604. The inner walls of the first belt 407 and the third belt 513 are both drivingly connected to the outer surface of the third belt pulley 604. The outer surface of the connecting shaft 602 is drivingly connected to a gear commutator 605. The upper surface of the gear commutator 605 penetrates above the fixed frame 601. Four support frames 606 are fixedly connected to the upper surface of the fixed frame 601. The bottom surfaces of the four support frames 606 are commonly fixedly connected to a connecting plate 607. Four fixing seats 608 are fixedly connected to the bottom surface of the connecting plate 607. A plowshare 609 is fixedly connected to the front surface of each fixing seat 608.

[0047] The front and back surfaces of the gear commutator 605 are both fixedly connected to second reinforcing ribs 610. The other ends of the two second reinforcing ribs 610 are respectively fixedly connected to one side surfaces of the two connecting frames 3 close to each other. The second reinforcing ribs 610 can further fix the position of the gear commutator 605, making the gear commutator 605 more stable and reliable during use;

[0048] The input end of the gear commutator 605 is fixedly connected to a fixed shaft 611. The left end of the fixed shaft 611 is fixedly connected to a fixed buckle 612. The fixed shaft 611 and the fixed buckle 612 can be connected to the output shaft of the tractor gearbox, so that the internal reversing gears of the gear commutator 605 can be smoothly driven when the tractor is running.

[0049] The specific implementation of this embodiment is as follows: By means of the support frame 606 in cooperation with the connecting plate 607 and the fixed seat 608, the plowshare 609 can turn up the soil in the paddy field, enabling the rice root straws in the paddy field soil to be smoothly exposed. Then, through the gear commutator 605, the power of the tractor can be transmitted to the connecting shaft 602, causing the connecting shaft 602 to drive the crushing knife 603 to quickly crush the turned-up soil and the rice root straws in the soil, so that the rice root straws can also be effectively crushed without excessive accumulation. The rice straw roots and the straw bodies can be crushed separately, preventing the direct mixing of the straw roots and the straw bodies during crushing, which may lead to poor straw crushing effect and easy accumulation in the soil, further ensuring the effect of returning rice straws to the field by crushing.

[0050] Specifically, when this rice straw crushing and returning device is in operation / use:

[0051] First, fix the device on the rear mounting rack of the tractor through the mounting buckle 2, and then connect it to the output shaft of the tractor gearbox through the fixed shaft 611 in cooperation with the fixed buckle 612, so that when the tractor runs, it can smoothly drive the connecting shaft 602 and the third belt pulley 604 to rotate counterclockwise through the gear commutator 605. At this time, through the connecting frame 3 in cooperation with the driving shaft 403 and the driven shaft 409, the third belt pulley 604 and the first belt 407 can be used to drive the second gear 406 to rotate counterclockwise in cooperation with the first belt pulley 405. Then, through the meshing of the second gear 406 and the first gear 404, the first gear 404 can be used to drive the driving shaft 403 and the conveyor belt 401 to rotate clockwise. At this time, through the collecting rod 402 on the conveyor belt 401 and the inclination angle of the conveyor belt 401 itself, the straws on the paddy field ground and the straws carrying rice roots inside the soil can be separated, enabling the straw roots and the straw bodies to complete sorting and separation, so that the straw roots and the straw bodies are crushed separately, thus effectively preventing the straws from being overly entangled with each other;

[0052] Then, through the meshing of the third gear 505 and the first gear 404, as the first gear 404 rotates clockwise, it can drive the third gear 505 and the auxiliary shaft 503 to rotate counterclockwise. Furthermore, in cooperation with the collection rack 502, the straw on the conveyor belt 401 can be sent into the protective cover 501 by using the auxiliary rod 504. The auxiliary groove 506 can prevent the protective cover 501 from affecting the normal rotation of the collection rod 402 and the conveyor belt 401. At this time, through the cooperation of the third belt 513 and the third pulley 604 with the second belt 512 and the second pulley 511, the two upper rotating rods 508 can be driven to rotate counterclockwise. Then, through the mutual meshing of the fourth gears 510, the two lower rotating rods 508 can be driven to rotate clockwise. Furthermore, in cooperation with the crushing knives 509, the rice straw entering the protective cover 501 can be crushed and discharged outward through the discharge cover 507, so that the straw rod bodies of the rice straw that are easy to crush can be quickly crushed into fine fragments, ensuring that the subsequent sowing will not be affected when the straw is crushed and returned to the field;

[0053] Furthermore, through the cooperation of the support frame 606, the connecting plate 607 and the fixing seat 608, after the conveyor belt 401 picks up the rice straw rod bodies in the paddy field, the plowshare 609 can turn over the soil in the paddy field, so that the rice root straws in the paddy field soil can be smoothly exposed. And the crushed rice straw rod bodies will fall between the plowshare 609 and the crushing knife 603 through the discharge cover 507. Then, with the cooperation of the gear commutator 605 and the connecting shaft 602, the crushing knife 603 can quickly crush the turned-up soil and the rice root straws in the soil, and at the same time mix the crushed rice straw rod bodies into the soil for returning to the field, so that the rice root straws can also be effectively crushed, and it can prevent the uncrushed rice straw rod bodies from affecting the crushing effect of the tunnel root straws, so that the rice straw will not accumulate too much, enabling the rice straw roots and the straw rod bodies to be crushed separately, preventing the direct mixing of the straw roots and the straw rod bodies during crushing, resulting in poor straw crushing effect and easy accumulation in the soil, and further ensuring the rice straw crushing and returning to the field effect.

[0054] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0055] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method and device for returning rice straw to the field by crushing, comprising a mounting frame (1), characterized in that: The upper surface of the mounting frame (1) is fixedly connected with a mounting buckle (2). The bottom surface of the mounting frame (1) is fixedly connected with two connecting frames (3). Above the two connecting frames (3), a sorting mechanism (4) is arranged. The sorting mechanism (4) includes a conveyor belt (401). The conveyor belt (401) is arranged between the two connecting frames (3). A number of collecting rods (402) are fixedly connected to the outer surface of the conveyor belt (401). A driving shaft (403) is rotatably connected inside the two connecting frames (3). The outer surface of the driving shaft (403) is in contact with the inner wall of the conveyor belt (401). One end of the driving shaft (403) is fixedly connected with a first gear (404). A first pulley (405) is rotatably connected to the front surface of one of the connecting frames (3). A second gear (406) is fixedly connected to the outer surface of the first pulley (405). The outer surface of the second gear (406) is meshed with the outer surface of the first gear (404). A first belt (407) is drivingly connected to the outer surface of the first pulley (405). A crushing mechanism (5) is fixedly installed on the upper surface of the sorting mechanism (4). A crushing and mixing mechanism (6) is arranged below the mounting frame (1).

2. The rice straw crushing and returning method and device according to claim 1, characterized in that: First reinforcing ribs (408) are fixedly connected to the upper surfaces of the two connecting frames (3). The other ends of the two first reinforcing ribs (408) are fixedly connected to the right side surface of the mounting frame (1).

3. The rice straw crushing and returning method and device according to claim 1, characterized in that: A driven shaft (409) is rotatably connected inside the two connecting frames (3). The outer surface of the driven shaft (409) is in contact with the inner wall of the conveyor belt (401).

4. A rice straw crushing and returning method and device according to claim 1, characterized in that: Auxiliary frames (410) are fixedly connected to the bottom surfaces of the two connecting frames (3). Two rollers (411) are rotatably connected to the bottom surfaces of the two auxiliary frames (410).

5. A rice straw crushing and returning method and device according to claim 1, characterized in that: The crushing mechanism (5) includes a protective cover (501). The upper surfaces of the two connecting frames (3) are fixedly connected to the bottom surface of the protective cover (501). A collecting frame (502) is fixedly connected to the left side surface of the protective cover (501). An auxiliary shaft (503) is rotatably connected inside the collecting frame (502). A plurality of auxiliary rods (504) are fixedly connected to the outer surface of the auxiliary shaft (503). One end of the auxiliary shaft (503) is fixedly connected to a third gear (505). The outer surface of the third gear (505) is meshed with the outer surface of the first gear (404). A plurality of auxiliary grooves (506) are formed in the inner bottom wall of the protective cover (501). Three discharge covers (507) are fixedly communicated with the right side surface of the protective cover (501). Four rotating rods (508) are rotatably connected inside the protective cover (501). A plurality of crushing knives (509) are fixedly connected to the outer surfaces of the four rotating rods (508). One end of each of the four rotating rods (508) is fixedly connected to a fourth gear (510). The outer surfaces of the upper and lower adjacent fourth gears (510) are meshed with each other. The front surfaces of two of the fourth gears (510) are fixedly connected with second pulleys (511). A second belt (512) is commonly drivenly connected to the outer surfaces of the two second pulleys (511). A third belt (513) is drivenly connected to the outer surface of one of the second pulleys (511).

6. A rice straw crushing and returning method and device according to claim 5, characterized in that: A maintenance door (514) is movably hinged to the upper surface of the protective cover (501) through a hinge. A handle (515) is fixedly connected to the upper surface of the maintenance door (514).

7. A rice straw crushing and returning method and device according to claim 5, characterized in that: The crushing and mixing mechanism (6) includes a fixed frame (601). The bottom surfaces of the two connecting frames (3) are fixedly connected to the upper surface of the fixed frame (601). A connecting shaft (602) is rotatably connected inside the fixed frame (601). A plurality of crushing knives (603) are fixedly connected to the outer surface of the connecting shaft (602). One end of the connecting shaft (602) is fixedly connected to a third pulley (604). The inner walls of the first belt (407) and the third belt (513) are both drivenly connected to the outer surface of the third pulley (604). A gear commutator (605) is drivenly connected to the outer surface of the connecting shaft (602). The upper surface of the gear commutator (605) penetrates above the fixed frame (601). Four support frames (606) are fixedly connected to the upper surface of the fixed frame (601). A connecting plate (607) is commonly fixedly connected to the bottom surfaces of the four support frames (606). Four fixing seats (608) are fixedly connected to the bottom surface of the connecting plate (607). A plowshare (609) is fixedly connected to the front surface of each fixing seat (608).

8. A method and device for pulverizing and returning rice straw to the field according to claim 7, characterized in that: Second reinforcing ribs (610) are fixedly connected to the front and back surfaces of the gear commutator (605). The other ends of the two second reinforcing ribs (610) are respectively fixedly connected to the mutually adjacent side surfaces of the two connecting frames (3).

9. A method and device for pulverizing and returning rice straw to the field according to claim 7, characterized in that: The input end of the gear commutator (605) is fixedly connected to a fixed shaft (611), and the left end of the fixed shaft (611) is fixedly connected to a fixed buckle (612).

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