Crop straw smashing and returning treatment machine suitable for sandy soil

Abstract

The crop straw smashing and field returning treatment machine suitable for sandy soil comprises a bottom plate, a connecting mechanism is arranged on the bottom plate, a plurality of supporting plates are fixedly connected to the bottom plate, and rolling wheels are installed on the supporting plates; the crushing assembly comprises a first-stage crushing mechanism and a second-stage crushing mechanism, a first motor is fixedly connected to the bottom plate and is in transmission connection with the first-stage crushing mechanism, a second motor is fixedly connected to the second-stage crushing mechanism and is in transmission connection with the second-stage crushing mechanism, and a spraying mechanism is arranged on the bottom plate; the spraying mechanism is used for spraying a straw decomposition agent solution; the rotary tillage assembly comprises a third rotating roller, a plurality of turning knives are fixedly connected to the third rotating roller, the third rotating roller is rotationally connected into a protective cover, and a third motor is arranged on the protective cover. By means of the first-stage smashing mechanism and the second-stage smashing mechanism, crop straw can be smashed twice, smashed particles can be smaller, a straw decomposition agent is sprayed at the same time, and finally the smashed straw and soil are mixed.

Description

Technical Field

[0001] The invention relates to the technical field of straw crushing and returning to the field, in particular to a crop straw crushing and returning to the field processing machine suitable for sandy soil. Background Art

[0002] Sandy soil is mainly composed of large particles of sand, with a loose texture, good air permeability and water permeability, but this soil structure also leads to poor water and fertilizer retention capacity and relatively low organic matter content. Straw is rich in organic matter and a variety of nutrients. By crushing and returning to the field, the nutrients in the straw can be quickly released into the soil, increasing the organic matter content of the soil, improving the soil structure, and improving the soil's water and fertilizer retention capacity, providing a rich source of nutrients for crop growth.

[0003] Some straw crushing and returning equipment in the prior art cannot turn the crushed straw into the soil, and a rotary tillage machine needs to be arranged again. In addition, when operating on sandy soil, the size of the straw crushed particles needs to be adjusted in time.

[0004] Therefore, a crop straw crushing and returning processing machine suitable for sandy soil is proposed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a crop straw crushing and returning machine suitable for sandy soil to solve the problems existing in the above-mentioned prior art. The crushed straw can be turned into the soil and the size of the straw crushed particles can be adjusted.

[0006] To achieve the above object, the present invention provides the following solution: The present invention provides a crop straw crushing and returning machine suitable for sandy soil, comprising:

[0007] A bottom plate, wherein a connecting mechanism is provided on the bottom plate, a plurality of supporting plates are fixedly connected to the bottom plate, and rollers are installed on the supporting plates;

[0008] A crushing assembly, the crushing assembly includes a primary crushing mechanism and a secondary crushing mechanism, a first motor is fixedly connected to the bottom plate, the first motor is in transmission connection with the primary crushing mechanism, the secondary crushing mechanism is located downstream of the primary crushing mechanism, a second motor is fixedly connected to the secondary crushing mechanism, the second motor is in transmission connection with the secondary crushing mechanism, a plurality of first electric telescopic rods are fixedly connected to the bottom plate, the first electric telescopic rods are in transmission connection with the secondary crushing mechanism, and a spraying mechanism is arranged on the bottom plate;

[0009] A rotary tillage assembly includes a third roller, a plurality of turning knives are fixedly connected to the third roller, a protective cover is rotatably connected to the base plate, the third roller is rotatably connected to the inside of the protective cover, a third motor is provided on the protective cover, the third motor is transmission-connected to the third roller, a second electric telescopic rod is provided on the base plate, and the second electric telescopic rod is transmission-connected to the protective cover.

[0010] Preferably, the primary crushing mechanism includes a first roller, two first mounting plates are fixedly connected to the bottom plate, the first roller is rotatably connected between the two first mounting plates, the first motor is transmission-connected to the first roller, a plurality of first crushing knives are arranged on the first roller, and a guard plate 1 is fixedly connected to the first mounting plate.

[0011] Preferably, the secondary crushing mechanism includes a plurality of second rollers and a base plate, the base plate is fixedly connected to two second mounting plates, the second roller is rotatably connected between the two second mounting plates, the second motor is transmission-connected to the second roller, the second roller is fixedly connected to a plurality of second crushing knives, the base plate is fixedly connected to a plurality of guide pillars, the base plate is provided with a plurality of first through holes, a conduit is fixedly connected in the first through holes, the guide pillar extends into the conduit, the top end of the guide pillar is fixedly connected to a top plate, the output end of the first electric telescopic rod is fixedly connected to the top plate, and a second guard plate is fixedly connected to the base plate.

[0012] Preferably, a first rotating shaft is fixedly connected to the first rotating roller, the first rotating shaft is rotatably connected to the first mounting plate, a first pulley is fixedly connected to the first rotating shaft, a second pulley is fixedly connected to the first motor output shaft, and the first pulley and the second pulley are connected via a belt transmission.

[0013] Preferably, a plurality of first fixed plates are fixedly connected to the second mounting plate, the second motor is fixedly connected to the first fixed plate, the second rotating roller is fixedly connected to the second rotating shaft, the second rotating shaft is rotatably connected to the second mounting plate, the second rotating shaft is fixedly connected to the third pulley, the output shaft of the second motor is fixedly connected to the fourth pulley, and the third pulley and the fourth pulley are connected via a second belt transmission.

[0014] Preferably, the third roller is fixedly connected to a third rotating shaft, the third rotating shaft is rotatably connected to the protective cover, the protective cover is fixedly connected to a second fixed plate, the third motor is fixedly connected to the second fixed plate, the third rotating shaft is fixedly connected to a fifth pulley, the output shaft of the third motor is fixedly connected to a sixth pulley, and the fifth pulley and the sixth pulley are connected via a belt transmission.

[0015] Preferably, the bottom plate is provided with a plurality of positioning mechanisms, the positioning mechanisms comprising a fixed block, the fixed block being fixedly connected to the bottom plate, the fixed block being provided with a cavity and a through hole, the through hole being communicated with the cavity, a moving block being placed in the cavity, a first connecting plate being fixedly connected to the moving block, a pressure plate being fixedly connected to the first connecting plate, a conical block being fixedly connected to the pressure plate, a second through hole being provided on the bottom plate, a connecting column being fixedly connected to the base plate, the connecting column and the top plate being fixedly connected, a plurality of grooves being provided on the surface of the connecting column, the conical block abutting against the grooves, a third electric telescopic rod being fixedly connected to the fixed block, and an output end of the third electric telescopic rod being fixedly connected to the first connecting plate.

[0016] Preferably, the spraying mechanism includes a solution tank and a water pump, the solution tank is fixedly connected to the base plate, the water pump is located in the solution tank, a hard pipe is fixedly connected to the bottom surface of the base plate, a plurality of nozzles are installed on the hard pipe, the hard pipe and the water pump are connected through a delivery pipe, and the nozzle is located upstream of the first roller.

[0017] Preferably, a first sleeve is fixedly connected to the base plate, a first central axis is passed through the first sleeve, the protective cover is fixedly connected to the first central axis, a third mounting plate is fixedly connected to the base plate, the second electric telescopic rod is hinged to the third mounting plate, a second connecting plate is fixedly connected to the second fixing plate, and the output end of the second electric telescopic rod is hinged to the second connecting plate.

[0018] Preferably, the connecting mechanism includes a second sleeve, the second sleeve is fixedly connected to the base plate, a second center axis is rotatably connected inside the second sleeve, a third connecting plate is fixedly connected to the second center axis, a connecting ring is fixedly connected to the third connecting plate, and a shell is fixedly connected to the base plate.

[0019] The invention discloses the following technical effects: the device is used by being towed by agricultural machinery, the connecting mechanism is used to be connected with the agricultural machinery, the roller can provide certain support for the device when working to prevent it from sinking too deeply into sandy soil, the primary crushing mechanism is used to perform primary crushing on crops, the secondary crushing mechanism is used to perform secondary crushing on crops, the first motor drives the primary crushing mechanism to work, the second motor drives the secondary crushing mechanism to work, the first electric telescopic rod can drive the secondary crushing mechanism to rise or fall, when in use, it can be determined whether to use the secondary crushing mechanism according to actual needs, when it is not necessary to finely crush the crop structure, the secondary crushing mechanism can be raised by the first electric telescopic rod, so that the secondary crushing mechanism does not participate in the crushing of straw, the spraying mechanism is used to spray a straw decomposing agent solution, the spraying mechanism is upstream of the primary crushing mechanism, the straw decomposing agent can accelerate the decomposition of the straw, thereby accelerating the improvement of the fertility of the sandy soil, the third motor drives the third roller to rotate, the crushed straw and soil are mixed by the turning knife, the second electric telescopic rod can drive the protective cover to rotate, so that the contact depth between the turning knife and the soil can be adjusted, so that the rotary tillage depth can be adjusted. The present invention can realize double crushing of crop straws through the primary crushing mechanism and the secondary crushing mechanism, so that the crushed particles can be smaller, and the crushed straws and soil can be mixed at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 This is a schematic diagram of the structure of the crop straw crushing and returning to the field processing machine applicable to sandy soil of the present invention;

[0022] Figure 2 for Figure 1 Middle AA section view;

[0023] Figure 3 for Figure 2 The enlarged image at a in the middle;

[0024] Among them, 1, bottom plate; 2, support plate; 3, roller; 4, first motor; 5, second motor; 6, first electric telescopic rod; 7, third roller; 8, protective cover; 9, third motor; 10, second electric telescopic rod; 11, first roller; 12, first mounting plate; 13, first crushing knife; 14, guard plate 1; 15, second roller; 16, base plate; 17, second mounting plate; 18, guide column; 19, top plate; 20, guard plate 2; 21, first shaft; 22, first pulley; 23, second pulley; 24, first fixed plate; 25, second shaft; 26, third pulley; 27, The fourth pulley; 28. the third rotating shaft; 29. ​​the second fixed plate; 30. the fifth pulley; 31. the sixth pulley; 32. the fixed block; 33. the cavity; 34. the moving block; 35. the first connecting plate; 36. the pressing plate; 37. the pointed cone block; 38. the connecting column; 39. the groove; 40. the third electric telescopic rod; 41. the solution tank; 42. the water pump; 43. the hard pipe; 44. the nozzle; 45. the first sleeve; 46. the first central axis; 47. the third mounting plate; 48. the second connecting plate; 49. the third connecting plate; 50. the connecting ring; 51. the outer shell; 52. the turning knife; 53. the second crushing knife. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Reference Figure 1-3 The present invention provides a crop straw crushing and returning machine suitable for sandy soil, comprising:

[0028] A bottom plate 1, on which a connecting mechanism is arranged, a plurality of supporting plates 2 are fixedly connected to the bottom plate 1, and rollers 3 are installed on the supporting plates 2;

[0029] The crushing assembly includes a primary crushing mechanism and a secondary crushing mechanism. A first motor 4 is fixedly connected to the bottom plate 1, and the first motor 4 is transmission-connected to the primary crushing mechanism. The secondary crushing mechanism is located downstream of the primary crushing mechanism. A second motor 5 is fixedly connected to the secondary crushing mechanism, and the second motor 5 is transmission-connected to the secondary crushing mechanism. A plurality of first electric telescopic rods 6 are fixedly connected to the bottom plate 1, and the first electric telescopic rods 6 are transmission-connected to the secondary crushing mechanism. A spraying mechanism is provided on the bottom plate 1;

[0030] The rotary tillage assembly includes a third roller 7, a plurality of turning knives 52 are fixedly connected to the third roller 7, a protective cover 8 is rotatably connected to the base plate 1, the third roller 7 is rotatably connected to the protective cover 8, a third motor 9 is arranged on the protective cover 8, the third motor 9 is transmission-connected to the third roller 7, a second electric telescopic rod 10 is arranged on the base plate 1, and the second electric telescopic rod 10 is transmission-connected to the protective cover 8.

[0031] The device is towed by agricultural machinery when in use, and the connecting mechanism is used to connect with the agricultural machinery. The roller 3 can provide a certain support for the device when working to prevent it from sinking too deeply into the sandy soil. The primary crushing mechanism is used to crush the crops for the first time, and the secondary crushing mechanism is used to crush the crops for the second time. The first motor 4 drives the primary crushing mechanism to work, and the second motor 5 drives the secondary crushing mechanism to work. The first electric telescopic rod 6 can drive the secondary crushing mechanism to rise or fall. When in use, it can be determined whether to use the secondary crushing mechanism according to actual needs. When there is no need to finely crush the crop structure, the first electric telescopic rod 6 can be used to drive the secondary crushing mechanism to rise or fall. During fine crushing, the secondary crushing mechanism can be raised by the first electric telescopic rod 6 so that the secondary crushing mechanism does not participate in the crushing of the straw. The spraying mechanism is used to spray the straw decomposing agent solution. The spraying mechanism is upstream of the primary crushing mechanism. The straw decomposing agent can accelerate the decomposition of the straw, thereby accelerating the improvement of the fertility of the sandy soil. The third motor 9 drives the third roller 7 to rotate, and the crushed straw and soil are mixed by the turning knife 52. The second electric telescopic rod 10 can drive the protective cover 8 to rotate, so that the contact depth between the turning knife 52 and the soil can be adjusted, so that the rotary tillage depth can be adjusted.

[0032] A further optimized solution is that the first-level crushing mechanism includes a first roller 11, two first mounting plates 12 are fixedly connected to the bottom plate 1, the first roller 11 is rotatably connected between the two first mounting plates 12, the first motor 4 is transmission-connected to the first roller 11, a plurality of first crushing knives 13 are arranged on the first roller 11, and a guard plate 14 is fixedly connected to the first mounting plate 12.

[0033] The first motor 4 drives the first roller 11 to rotate, and the first roller 11 drives the first crushing knife 13 to rotate to crush the crop straws. The guard plate 14 can reduce the splashing of the crop straws during the crushing process.

[0034] A further optimized solution is provided, wherein the secondary crushing mechanism comprises a plurality of second rollers 15 and a base plate 16, wherein two second mounting plates 17 are fixedly connected to the base plate 16, the second roller 15 is rotatably connected between the two second mounting plates 17, the second motor 5 is transmission-connected to the second roller 15, a plurality of second crushing knives 53 are fixedly connected to the second roller 15, a plurality of guide pillars 18 are fixedly connected to the base plate 16, a plurality of first through holes are provided on the bottom plate 1, a conduit is fixedly connected in the first through hole, the guide pillar 18 extends into the conduit, a top plate 19 is fixedly connected to the top end of the guide pillar 18, the output end of the first electric telescopic rod 6 is fixedly connected to the top plate 19, and a guard plate 20 is fixedly connected to the base plate 16.

[0035] The second motor 5 drives the second roller 15 to rotate, and the second roller 15 drives the second crushing knife 53 to rotate to perform secondary crushing on the crop straw. The first electric telescopic rod 6 drives the top plate 19 to rise or fall, and the top plate 19 drives the guide column 18 to move up and down in the conduit. The conduit can make the movement of the guide column 18 more stable. When secondary crushing is required, the first electric telescopic rod 6 drives the top plate 19 to move down, so that the second roller 15 moves, and the second crushing knife 53 performs secondary crushing on the straw. When secondary crushing is not required, the first electric telescopic rod 6 drives the top plate 19 to move up, so that the second roller 15 moves up, so that the second crushing knife 53 does not contact the straw.

[0036] A further optimized solution is that a first rotating shaft 21 is fixedly connected to the first rotating roller 11, the first rotating shaft 21 is rotatably connected to the first mounting plate 12, a first pulley 22 is fixedly connected to the first rotating shaft 21, a second pulley 23 is fixedly connected to the output shaft of the first motor 4, and the first pulley 22 and the second pulley 23 are connected through a belt transmission.

[0037] The first roller 11 is rotatably connected to the first mounting plate 12 via the first rotating shaft 21 , the first motor 4 drives the second pulley 23 to rotate, the second pulley 23 is transmission-connected to the first pulley 22 via a belt 1, and the first pulley 22 drives the first rotating shaft 21 to rotate.

[0038] A further optimized solution is that a plurality of first fixed plates 24 are fixedly connected to the second mounting plate 17, the second motor 5 is fixedly connected to the first fixed plate 24, the second rotating roller 15 is fixedly connected to the second rotating shaft 25, the second rotating shaft 25 is rotatably connected to the second mounting plate 17, a third pulley 26 is fixedly connected to the second rotating shaft 25, a fourth pulley 27 is fixedly connected to the output shaft of the second motor 5, and the third pulley 26 and the fourth pulley 27 are connected through a second belt transmission.

[0039] The second motor 5 drives the fourth pulley 27 to rotate. The fourth pulley 27 is connected to the third pulley 26 through the second belt. The third pulley 26 drives the second rotating shaft 25 to rotate.

[0040] A further optimized solution is that the third roller 7 is fixedly connected to a third rotating shaft 28, the third rotating shaft 28 is rotatably connected to the protective cover 8, the protective cover 8 is fixedly connected to a second fixed plate 29, the third motor 9 is fixedly connected to the second fixed plate 29, the third rotating shaft 28 is fixedly connected to a fifth pulley 30, the output shaft of the third motor 9 is fixedly connected to a sixth pulley 31, and the fifth pulley 30 and the sixth pulley 31 are connected through a belt transmission.

[0041] The protective cover 8 can reduce the splashing of soil during rotary tillage. The third motor 9 drives the sixth pulley 31 to rotate. The sixth pulley 31 is connected to the fifth pulley 30 through belt three. The fifth pulley 30 drives the third rotating shaft 28 to rotate, so that the crushed crop straw and soil can be mixed.

[0042] A further optimization scheme is provided on the bottom plate 1, and the positioning mechanisms include a fixed block 32, which is fixedly connected to the bottom plate 1, and a cavity 33 and a through hole are provided on the fixed block 32, and the through hole is connected to the cavity 33, and a moving block 34 is placed in the cavity 33, and a first connecting plate 35 is fixedly connected to the moving block 34, and a pressure plate 36 is fixedly connected to the first connecting plate 35, and a pointed cone block 37 is fixedly connected to the pressure plate 36, and a second through hole is provided on the bottom plate 1, and a connecting column 38 is fixedly connected to the substrate 16, and the connecting column 38 is fixedly connected to the top plate 19, and a plurality of grooves 39 are provided on the surface of the connecting column 38, and the pointed cone block 37 abuts against the groove 39, and a third electric telescopic rod 40 is fixedly connected to the fixed block 32, and the output end of the third electric telescopic rod 40 is fixedly connected to the first connecting plate 35.

[0043] The positioning mechanism is used to stabilize the secondary crushing mechanism. When the crop straw needs to be crushed for the second time, the second crushing knife 53 will come into contact with the straw, which may generate an upward thrust on the second roller 15. Using the positioning mechanism, under the action of the second electric telescopic rod 10, the second crushing knife 53 comes into contact with the straw. To prevent the connecting column 38 from shaking up and down, the third electric telescopic rod 40 is extended, and the third electric telescopic rod 40 drives the moving block 34 to move in the cavity 33. The moving block 34 drives the first connecting plate 35 and the pressing plate 36 to move, so that the pointed cone block 37 on the pressing plate 36 abuts against the groove 39, thereby preventing the connecting column 38 from shaking up and down. This ensures that the second roller 15 will not shake up and down during the secondary crushing.

[0044] A further optimized solution is that the spraying mechanism includes a solution tank 41 and a water pump 42. The solution tank 41 is fixedly connected to the base plate 1, and the water pump 42 is located in the solution tank 41. A hard pipe 43 is fixedly connected to the bottom surface of the base plate 1, and a plurality of nozzles 44 are installed on the hard pipe 43. The hard pipe 43 and the water pump 42 are connected by a delivery pipe, and the nozzle 44 is located upstream of the first rotating roller 11.

[0045] The solution box 41 is used to be filled with straw decomposing agent solution, and the water pump 42 pumps the solution into the hard pipe 43, and then sprays it onto the straw through the nozzle 44.

[0046] A further optimized solution is that a first sleeve 45 is fixedly connected to the base plate 1, a first central axis 46 is passed through the first sleeve 45, the protective cover 8 is fixedly connected to the first central axis 46, a third mounting plate 47 is fixedly connected to the base plate 1, the second electric telescopic rod 10 is hinged on the third mounting plate 47, a second connecting plate 48 is fixedly connected to the protective cover 8, and the output end of the second electric telescopic rod 10 is hinged to the second connecting plate 48.

[0047] The protective cover 8 and the base plate 1 are rotatably connected through the first central shaft 46 and the first sleeve 45. When the second electric telescopic rod 10 is extended or retracted, the second connecting plate 48 is driven to move, thereby driving the protective cover 8 to rotate, thereby facilitating the adjustment of the contact depth between the turning knife 52 and the soil.

[0048] A further optimized solution is that the connecting mechanism includes a second sleeve, the second sleeve is fixedly connected to the base plate 1, a second central axis is rotatably connected inside the second sleeve, a third connecting plate 49 is fixedly connected to the second central axis, a connecting ring 50 is fixedly connected to the third connecting plate 49, and a shell 51 is fixedly connected to the base plate 1.

[0049] The third connecting plate 49 is rotatably connected to the bottom plate 1 through the rotatable connection between the second sleeve and the second central axis. The outer shell 51 covers the solution box 41 and the top plate 19 to protect the internal structure. The outer shell 51 has a hole for adding solution.

[0050] The working principle of the device is that the device is used by being towed by agricultural machinery, and the agricultural machinery is connected to the connecting mechanism. Before crushing, the straw decomposing agent solution is first poured into the solution tank 41, and then the water pump 42 is started. The water pump 42 pumps the solution into the hard pipe 43, and then sprays it onto the straw through the nozzle 44. When it is necessary to crush the crop straw twice, the top plate 19 is driven downward by the first electric telescopic rod 6, and the guide column 18 and the base plate 16 are driven downward, so that the second crushing knife 53 contacts the straw. After the crushing work starts, the primary crushing mechanism first crushes the straw, the first motor 4 drives the first roller 11 to rotate, and the first roller 11 drives the first crushing knife 13 to rotate to crush the crop straw. The second motor 5 drives the second roller 15 to rotate, and the second roller 15 drives the second crushing knife 53 to rotate, so as to perform secondary crushing on the crop straw. The straw particles after the two crushing are smaller and easier to be decomposed. The third motor 9 drives the sixth pulley 31 to rotate, and the sixth pulley 31 is connected to the fifth pulley 30 through the belt three. The fifth pulley 30 drives the third rotating shaft 28 to rotate, and the third rotating shaft 28 drives the third roller 7 to rotate, and the crushed straw and soil are mixed by the turning knife 52. When the rotary tillage depth needs to be adjusted, the second electric telescopic rod 10 is extended or retracted, driving the second connecting plate 48 to move, so as to drive the protective cover 8 to rotate, so as to facilitate the adjustment of the contact depth between the turning knife 52 and the soil.

[0051] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0052] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A crop straw crushing and returning machine suitable for sandy soil, characterized in that: include: A bottom plate (1), wherein a connecting mechanism is provided on the bottom plate (1), a plurality of supporting plates (2) are fixedly connected to the bottom plate (1), and rollers (3) are installed on the supporting plates (2); A crushing assembly, the crushing assembly comprising a primary crushing mechanism and a secondary crushing mechanism, the base plate (1) being fixedly connected with a first motor (4), the first motor (4) being in transmission connection with the primary crushing mechanism, the secondary crushing mechanism being located downstream of the primary crushing mechanism, the secondary crushing mechanism being fixedly connected with a second motor (5), the second motor (5) being in transmission connection with the secondary crushing mechanism, the base plate (1) being fixedly connected with a plurality of first electric telescopic rods (6), the first electric telescopic rods (6) being in transmission connection with the secondary crushing mechanism, and the base plate (1) being provided with a spraying mechanism; A rotary tillage assembly, the rotary tillage assembly comprising a third roller (7), a plurality of turning knives (52) being fixedly connected to the third roller (7), a protective cover (8) being rotatably connected to the bottom plate (1), the third roller (7) being rotatably connected to the inside of the protective cover (8), a third motor (9) being arranged on the protective cover (8), the third motor (9) being transmission-connected to the third roller (7), a second electric telescopic rod (10) being transmission-connected to the protective cover (8), and a second electric telescopic rod (10) being transmission-connected to the bottom plate (1).

2. The crop straw crushing and returning machine suitable for sandy soil according to claim 1 is characterized in that: The primary crushing mechanism comprises a first rotating roller (11), two first mounting plates (12) are fixedly connected to the bottom plate (1), the first rotating roller (11) is rotatably connected between the two first mounting plates (12), the first motor (4) is transmission-connected to the first rotating roller (11), a plurality of first crushing knives (13) are arranged on the first rotating roller (11), and a guard plate 1 (14) is fixedly connected to the first mounting plate (12).

3. The crop straw crushing and returning machine suitable for sandy soil according to claim 1 is characterized in that: The secondary crushing mechanism comprises a plurality of second rollers (15) and a base plate (16). Two second mounting plates (17) are fixedly connected to the base plate (16). The second roller (15) is rotatably connected between the two second mounting plates (17). The second motor (5) is transmission-connected to the second roller (15). A plurality of second crushing knives (53) are fixedly connected to the second roller (15). A plurality of guide pillars (18) are fixedly connected to the base plate (16). A plurality of first through holes are formed on the bottom plate (1). A conduit is fixedly connected in the first through holes. The guide pillars (18) extend into the conduit. A top plate (19) is fixedly connected to the top of the guide pillars (18). The output end of the first electric telescopic rod (6) is fixedly connected to the top plate (19). A second guard plate (20) is fixedly connected to the base plate (16).

4. The crop straw crushing and returning machine suitable for sandy soil according to claim 2 is characterized in that: The first rotating roller (11) is fixedly connected to a first rotating shaft (21), the first rotating shaft (21) is rotatably connected to the first mounting plate (12), the first rotating shaft (21) is fixedly connected to a first pulley (22), the output shaft of the first motor (4) is fixedly connected to a second pulley (23), and the first pulley (22) and the second pulley (23) are connected via a belt transmission.

5. The crop straw crushing and returning machine suitable for sandy soil according to claim 3 is characterized by: A plurality of first fixed plates (24) are fixedly connected to the second mounting plate (17); the second motor (5) is fixedly connected to the first fixed plate (24); the second rotating roller (15) is fixedly connected to a second rotating shaft (25); the second rotating shaft (25) is rotatably connected to the second mounting plate (17); a third pulley (26) is fixedly connected to the second rotating shaft (25); a fourth pulley (27) is fixedly connected to the output shaft of the second motor (5); the third pulley (26) and the fourth pulley (27) are connected via a second belt transmission.

6. The crop straw crushing and returning machine suitable for sandy soil according to claim 1, characterized in that: The third rotating roller (7) is fixedly connected to a third rotating shaft (28), the third rotating shaft (28) is rotatably connected to the protective cover (8), the protective cover (8) is fixedly connected to a second fixed plate (29), the third motor (9) is fixedly connected to the second fixed plate (29), the third rotating shaft (28) is fixedly connected to a fifth pulley (30), the output shaft of the third motor (9) is fixedly connected to a sixth pulley (31), and the fifth pulley (30) and the sixth pulley (31) are connected via a belt transmission.

7. The crop straw crushing and returning machine suitable for sandy soil according to claim 3 is characterized by: The bottom plate (1) is provided with a plurality of positioning mechanisms, the positioning mechanisms comprising a fixed block (32), the fixed block (32) being fixedly connected to the bottom plate (1), the fixed block (32) being provided with a cavity (33) and a through hole, the through hole being communicated with the cavity (33), a moving block (34) being placed in the cavity (33), the moving block (34) being fixedly connected to a first connecting plate (35), the first connecting plate (35) being fixedly connected to a pressing plate (36), the pressing plate (36) being fixedly connected to A pointed cone block (37) is connected, a second through hole is provided on the bottom plate (1), a connecting column (38) is fixedly connected to the base plate (16), the connecting column (38) and the top plate (19) are fixedly connected, a plurality of grooves (39) are provided on the surface of the connecting column (38), the pointed cone block (37) abuts against the grooves (39), a third electric telescopic rod (40) is fixedly connected to the fixed block (32), and the output end of the third electric telescopic rod (40) is fixedly connected to the first connecting plate (35).

8. The crop straw crushing and returning machine suitable for sandy soil according to claim 2, characterized in that: The spraying mechanism comprises a solution tank (41) and a water pump (42); the solution tank (41) is fixedly connected to the bottom plate (1); the water pump (42) is located in the solution tank (41); a hard pipe (43) is fixedly connected to the bottom surface of the bottom plate (1); a plurality of nozzles (44) are installed on the hard pipe (43); the hard pipe (43) and the water pump (42) are connected via a delivery pipe; the nozzles (44) are located upstream of the first rotating roller (11).

9. The crop straw crushing and returning machine suitable for sandy soil according to claim 6, characterized in that: A first sleeve (45) is fixedly connected to the base plate (1), a first central axis (46) is passed through the first sleeve (45), the protective cover (8) is fixedly connected to the first central axis (46), a third mounting plate (47) is fixedly connected to the base plate (1), the second electric telescopic rod (10) is hinged on the third mounting plate (47), a second connecting plate (48) is fixedly connected to the second fixing plate (29), and an output end of the second electric telescopic rod (10) is hinged to the second connecting plate (48).

10. The crop straw crushing and returning machine suitable for sandy soil according to claim 1, characterized in that: The connection mechanism comprises a second sleeve, the second sleeve is fixedly connected to the base plate (1), a second central shaft is rotatably connected inside the second sleeve, a third connecting plate (49) is fixedly connected to the second central shaft, a connecting ring (50) is fixedly connected to the third connecting plate (49), and a housing (51) is fixedly connected to the base plate (1).

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