Straw returning to field crushing equipment
By installing extrusion rollers and a water collection tank in the straw returning and crushing equipment, the problems of low crushing efficiency and high equipment wear of wet straw are solved, achieving efficient crushing and uniform straw particle production, and improving soil fertility.
Patent Information
- Application Number
- CN202520274064.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-02-20
AI Technical Summary
In existing technologies, the dense structure and increased toughness of wet straw fibers lead to problems such as low crushing efficiency and severe equipment wear.
The straw returning to the field crushing equipment is equipped with extrusion rollers and a water collection tank. The extrusion rollers separate the water in the straw from the straw, and the filter plate guides the water to the water collection tank. Then, the straw is cut and crushed to reduce its moisture content and toughness.
It improves crushing efficiency, reduces equipment wear, extends equipment lifespan, ensures uniformity of straw particles, and promotes soil fertility improvement.
Smart Images
Figure CN223600412U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a field of pulverization equipment, concretely relates to a straw returning to field pulverization equipment. BACKGROUND
[0002] Straw returning to field is a kind of fertilization mode to improve soil physical and chemical properties, accelerate the maturation of raw soil and improve soil fertility by directly or after piling up and rotting, straw returning to field after harvesting.Crop residues can not only be effectively utilized, but also reduce environmental pollution, and have significant ecological and economic benefits.Common straw returning to field methods include pulverization and pressing, covering, leaving high stubble and so on.
[0003] Straw pulverization is a key link in the process of straw returning to field, mainly through mechanical device to cut straw into smaller fragments, so as to better mix with soil and accelerate its decomposition process.However, in actual operation, the structure of wet straw fiber is compact, and the toughness is enhanced, so that the machine is difficult to cut it into uniform short blocks or particles, not only reduces the pulverization efficiency, but also may cause the equipment to wear and tear.
[0004] Therefore, the present application is proposed. CONTENT OF THE UTILITY MODEL
[0005] The utility model aims at providing a kind of straw returning to field pulverization equipment, by setting extrusion roller piece in feed piece, setting water collecting tank and setting filter plate at its top, the water separated by extrusion is collected and then cut and pulverized, to solve the problem of compact structure of wet straw fiber, enhanced toughness, low pulverization efficiency and large equipment wear in the prior art.
[0006] The utility model embodiment realizes by the following technical scheme: the utility model embodiment provides a kind of straw returning to field pulverization equipment, including equipment shell, still include:
[0007] Feed piece is set on equipment shell, is used for straw feed, and extrusion roller piece is set in feed piece, and extrusion roller piece is set to separate water in straw from straw;
[0008] Water collecting tank is set in equipment shell, and filter plate is set on the top of water collecting tank, and water collecting tank is set to guide the water separated by extrusion roller piece to its inside by filter plate;
[0009] Cutting piece is set in equipment shell and is located at the side of filter plate, and is set to cut the straw after extrusion;
[0010] Pulverization piece is set in equipment shell and is located below cutting piece, and pulverization piece is set to pulverize the straw block after cutting by cutting piece.
[0011] Optionally, the cross section of the feeding member is trapezoidal, and the opening size gradually decreases from the outer side to the inner side.
[0012] Optionally, the feeding member comprises an upper plate and a lower plate, the upper plate is arranged to be inclined downward from the outer side to the inner side, the lower plate is arranged to be inclined downward from the outer side to the inner side, and the inclination angle of the upper plate is greater than that of the lower plate.
[0013] The filter plate is connected to the lower end of the lower plate.
[0014] Optionally, the filter plate is arranged horizontally and detachably arranged on the top of the water collecting tank, and the water collecting tank is provided with a water outlet at the bottom.
[0015] Optionally, the cutting member comprises a first cutting roller and a second cutting roller, the first cutting roller is arranged on one side of the filter plate, and the side of the filter plate away from the feeding member is arranged at the same horizontal position as the first cutting roller.
[0016] The first cutting roller and the second cutting roller are arranged to rotate in opposite directions to cut the extruded straw.
[0017] Optionally, the crushing member comprises a support and a rotating rod, the support is provided with a motor, the output end of the motor is connected to one end of the rotating rod, and the motor is arranged to drive the rotating rod to rotate.
[0018] The rotating rod is provided with a plurality of cutting blades.
[0019] Optionally, the rotating rod is further provided with a screening plate, the screening plate is provided with a plurality of screening holes, each screening hole has the same size, the screening plate is located below the cutting blades, and the screening plate can rotate with the rotating rod.
[0020] The bottom of the device shell is provided with a discharge port, and the discharge port is located below the screening plate.
[0021] Optionally, the screening plate is provided with a through hole, the rotating rod penetrates through the through hole, and the rotating rod can slide in the through hole.
[0022] The rotating rod is provided with an external thread, and a first nut and a second nut are sleeved on the external thread, the first nut is located above the screening plate, the second nut is located below the screening plate, and the first nut and the second nut are arranged to jointly fix the screening plate on the rotating rod.
[0023] Optionally, the support comprises a first connecting rod, a second connecting rod and a support disc, one end of each of the first connecting rod and the second connecting rod is connected to the device shell, and the other end is connected to the support disc, the motor is arranged on the support disc, a protective cover is movably arranged on the upper end of the support disc, and the protective cover is conical.
[0024] When the protective cover is closed on the support disc, the protective cover can hide the motor inside.
[0025] Optionally, the inner side of the device shell is provided with a heating wire, and the heating wire is arranged to dry the straw block and the straw pieces.
[0026] An exhaust port is arranged above the device shell, and a fan is arranged beside the exhaust port.
[0027] The device shell is open at the upper end, and the top movable cover is provided with an end cover.
[0028] Compared with the prior art, the device shell has the following advantages and beneficial effects:
[0029] The straw enters the device through the feeding piece, the extrusion roller in the device can rotate under the drive of the motor, the straw is extruded to squeeze out the water in the straw. The squeezed water enters the water collecting tank through the filter plate, and the extruded straw continues to move to the working area of the cutting piece, and the cutting piece cuts the straw into shorter segments through the blade or cutting device. The cut straw block falls into the working area of the crushing piece, and the crushing piece further refines the straw block into powder or granules. The crushed straw is discharged from the discharge port of the device shell and enters the farmland for returning to the field.
[0030] In the embodiment of the utility model, the water in the straw is separated by the extrusion roller, the water content and toughness of the straw are reduced, the cutting piece and the crushing piece can more efficiently cut and crush the straw, the crushing efficiency is significantly improved, the operation time and energy consumption of the device are reduced, the wear of the cutting piece and the crushing piece is reduced, the service life of the device is prolonged, and the maintenance cost of the device is reduced. By cutting the straw into relatively uniform blocks and then crushing, the obtained straw particles are more uniform, and after mixing with the soil, the straw decomposition process is accelerated and the soil fertility is improved. Through the cooperation of the water collecting tank and the filter plate, the squeezed water is effectively treated, and pollution of the water to the device and the soil is avoided. BRIEF DESCRIPTION OF DRAWINGS
[0031] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, it should be understood that the following drawings only show some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for the ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.
[0032] Figure 1 The structure diagram of the straw returning to the field crushing device provided in the embodiments of the utility model is shown.
[0033] Figure 2 The structure diagram of the rotating rod and the screening plate connection provided in the embodiments of the utility model is shown.
[0034] Figure 3 A structure schematic view of the support provided by the utility model embodiment is shown in the figure.
[0035] Figure 4 A structure schematic view of the protective cover provided by the utility model embodiment is shown in the figure.
[0036] Markings in the figures and corresponding component names:
[0037] 1-extrusion roller, 2-water collecting tank, 3-equipment shell, 4-filter plate, 5-upper plate, 6-lower plate, 7-drainage port, 8-first cutting roller, 9-second cutting roller, 10-support, 11-rotating rod, 12-motor, 13-cutting blade, 14-sieve plate, 15-sieve hole, 16-discharge port, 17-first nut, 18-second nut, 19-first connecting rod, 20-second connecting rod, 21-supporting disc, 22-protective cover, 23-heating wire, 24-exhaust port, 25-end cover, 26-fan. DETAILED DESCRIPTION
[0038] In order to make the purpose, technical scheme and advantages of the utility model embodiments clearer, the technical scheme in the utility model embodiments will be described clearly and completely below in combination with the drawings in the utility model embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the utility model embodiments described and shown in the drawings here can be arranged and designed in various different configurations.
[0039] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.
[0040] It should be noted that: similar labels and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0041] In the description of the utility model, it should be noted that the terms "first", "second", "third" and the like are only used for differentiation and description, and cannot be understood as indicating or implying relative importance.
[0042] EMBODIMENT
[0043] The utility model embodiment provides a straw returning to field crushing equipment, such as Figure 1As shown, including device shell 3, feed, water collecting tank 2, cutting piece and crushing piece, wherein: feed, set in the device shell 3, for straw feed, feed is provided with extrusion roller piece 1 in the feed, extrusion roller piece 1 is set to separate the moisture in the straw from the straw; water collecting tank 2, set in the device shell 3, water collecting tank 2 top is provided with filter plate 4, water collecting tank 2 is set to guide the moisture separated by extrusion roller piece 1 through filter plate 4 to its inside; cutting piece, set in the device shell 3, and located in the filter plate 4 side, set to cut the extruded straw; crushing piece, set in the device shell 3, and located below the cutting piece, crushing piece set to crush the straw block cut by cutting piece.
[0044] Specifically, the feed is fixedly installed on the top or side of the device shell 3, as the entrance of the straw into the device, to ensure that the straw can smoothly enter the inside of the device, the pressure roller is installed in the inside of the feed, tightly matched with the inner wall of the feed, fixed on the feed by bearing or other connecting piece, can freely rotate in the feed, extruding the entering straw, it should be noted that the rotating power of the pressure roller can be motor, pneumatic cylinder or other mechanism, which is not limited here. The water collecting tank 2 is fixedly installed on the bottom or side of the device shell 3, and is fixed with the device shell 3 by welding or bolt connection, to ensure the stability and sealing of the water collecting tank 2, prevent water leakage, the filter plate 4 is installed on the top of the water collecting tank 2, connected with the water collecting tank 2 by clamping slot or bolt, the filter hole of the filter plate 4 faces the feed direction, in order to guide the extruded moisture, at the same time can prevent the straw fragments from entering the water collecting tank 2. The cutting piece is fixedly installed in the corresponding position in the device shell 3, located beside the filter plate 4, connected with the power system of the device by motor drive or transmission device, can cut when the device runs, the crushing piece is installed at the bottom of the device shell 3, below the cutting piece, also connected with the power system of the device by motor drive or transmission device, can crush when the straw block cut by the cutting piece enters the crushing piece.
[0045] Exemplarily, when the straw enters the device through the feeding piece, the extrusion roller piece 1 starts to rotate, applies pressure to the straw, and extrudes the moisture in the straw. The extruded moisture enters the water collecting tank 2 through the filter plate 4, and the extruded straw continues to move to the inside of the device and enters the working area of the cutting piece. After receiving the extruded straw, the cutting piece cuts the straw into shorter segments. The cut straw blocks fall into the working area of the crushing piece, and the crushing piece further refines the straw blocks into powder or particles through high-speed rotating hammer heads or blades. The cooperation of the cutting piece and the crushing piece enables the straw to be gradually refined from a larger block to a size suitable for returning to the field. When the extruded moisture of the extrusion roller piece 1 passes through the filter plate 4, the filter plate 4 intercepts impurities and small straw fibers in the moisture, and only allows the moisture to pass into the water collecting tank 2. The moisture in the water collecting tank 2 can be discharged from the device through a drain pipe or a valve, realizing effective collection and treatment of the moisture and avoiding pollution and corrosion of the device caused by the moisture.
[0046] The embodiment of the utility model separates the moisture in the straw through the extrusion roller piece 1, reduces the moisture content and toughness of the straw, enables the cutting piece and the crushing piece to cut and crush the straw more efficiently, significantly improves the crushing efficiency, reduces the operation time and energy consumption of the device, reduces the moisture content and toughness of the straw through the pretreatment of the extrusion roller piece 1, reduces the wear of the cutting piece and the crushing piece, prolongs the service life of the device, and reduces the maintenance cost of the device. The size of the crushed straw is more uniform through the embodiment of the utility model, which can be more uniformly mixed with the soil, accelerate the composting process of the straw, and improve the soil fertility. At the same time, through the cooperation of the water collecting tank 2 and the filter plate 4, the extruded moisture is effectively treated, and pollution of the device and the soil caused by the moisture is avoided.
[0047] As a preferred embodiment of the utility model, the cross section of the feeding piece is trapezoidal, and the opening size gradually decreases from the outside to the inside. This structure helps to better guide the straw into the device and can reduce the blocking and accumulation of the straw during the feeding process, and also helps to adapt to different sizes of straw to ensure that the straw can enter the device uniformly for subsequent processing. Exemplarily, the feeding piece includes an upper plate 5 and a lower plate 6, the upper plate 5 is inclined downward from the outside to the inside, the lower plate 6 is inclined downward from the outside to the inside, and the inclination angle of the upper plate 5 is greater than that of the lower plate 6; the filter plate 4 is connected with the lower end of the lower plate 6.
[0048] In detail, the upper plate 5 is arranged downwardly from the outer side to the inner side with a large inclination angle, which can be set between 30°-45°, which helps the straw to slide down quickly when entering the device and reduces the accumulation of straw at the inlet. The lower plate 6 is arranged downwardly from the outer side to the inner side with a small inclination angle, which can be set between 15°-20°. The small inclination angle of the lower plate 6 can ensure that the straw does not bounce out during the sliding process due to the large angle, and can also guide the straw to enter the extrusion roller 1 smoothly. The extrusion roller 1 is installed inside the inlet, which can be extruded by one extrusion roller in cooperation with the lower plate 6, or two or more extrusion rollers can be set to cooperate with each other, which is not limited here. Preferably, the surface of the extrusion roller can be designed with protrusions or textures to increase the friction with the straw, improve the extrusion effect, and the structure of the extruded straw fibers becomes loose, which is easier to be cut and crushed, reducing the wear of the device. The lower plate 6 is arranged downwardly from the outer side to the inner side and is connected and cooperated with the filter plate 4, which can efficiently guide the extruded water to the filter plate 4 for collection.
[0049] It should be noted that the filter plate 4 can be horizontally arranged or inclined, which is not limited here as long as it can achieve the purpose of collecting water. As a preferred embodiment of the present application, the filter plate 4 is arranged horizontally, so that the filter plate 4 can accurately guide the straw to the cutting area, and the filter plate 4 is detachably arranged on the top of the water collecting tank 2, which facilitates the disassembly and cleaning of the filter plate 4, and even subsequent maintenance and replacement. The water collecting tank 2 is provided with a drain 7 at the bottom for discharging the collected water.
[0050] Further, the cutting member includes a first cutting roller 8 and a second cutting roller 9, the first cutting roller 8 is arranged on one side of the filter plate 4, and the side of the filter plate 4 away from the inlet is arranged at the same horizontal position as the first cutting roller 8, which ensures that the straw can directly enter the working area of the first cutting roller 8 after passing through the extrusion roller 1 for preliminary cutting; the first cutting roller 8 and the second cutting roller 9 are arranged to rotate in opposite directions to cut the extruded straw. The first cutting roller 8 and the second cutting roller 9 are arranged in opposite directions to rotate in opposite directions, so that the straw receives greater shear force during cutting, ensuring that the straw can be uniformly cut into smaller segments.
[0051] In the embodiment of the utility model, the crushing piece includes support piece 10 and rotating rod 11, motor 12 is arranged on support piece 10, the output end of motor 12 is connected with one end of rotating rod 11, motor 12 is arranged as the drive rotating rod 11 rotates, a plurality of cutting blades 13 are arranged on rotating rod 11. Support piece 10 is the fixed part of crushing piece, motor 12 is fixed on support piece 10 through bolt, and the stable operation of motor 12 is ensured. One end of rotating rod 11 is connected with the output end of motor 12 through coupling, and the other end can be fixed on equipment shell 3 through bearing, and the stable rotation of rotating rod 11 is ensured, and cutting blade 13 can be arranged as 8-12 pieces, and the size of the straw is adjusted according to the processing capacity of the equipment, and the shape of cutting blade 13 can be designed as sawtooth, wave or straight blade, to increase the cutting effect, and cutting blade 13 can be fixed on rotating rod 11 through bolt or welding, to ensure the firmness and stability of the blade. When using, motor 12 passes through coupling and transmits power to rotating rod 11, and drives rotating rod 11 to rotate at high speed. The high-speed rotation of rotating rod 11 drives cutting blade 13, so that cutting blade 13 can efficiently crush the straw.
[0052] Further, as shown in Figure 2 Rotating rod 11 is further provided with sieve plate 14, a plurality of sieve holes 15 are arranged on sieve plate 14, the size of each sieve hole 15 is equal, sieve plate 14 is located below cutting blade 13, and sieve plate 14 can rotate with rotating rod 11. The bottom of equipment shell 3 is provided with discharge port 16, and discharge port 16 is located below sieve plate 14. Sieve plate 14 is arranged on rotating rod 11 and located below cutting blade 13. Sieve plate 14 can rotate with rotating rod 11, so that the crushed straw can pass through sieve hole 15 uniformly, sieve hole 15 on sieve plate 14 can filter out the straw block that is not completely crushed, so that the size of the discharged straw is uniform, and the quality of returning to the field is improved. It should be noted that the connecting structure of sieve plate 14 and rotating rod 11 is not limited here, as long as the purpose of sufficient connection stability can be achieved.
[0053] As the preferred embodiment of the utility model, the sieve plate 14 is provided with a through hole, the rotating rod 11 penetrates the through hole, and the rotating rod 11 can slide in the through hole; the rotating rod 11 is provided with external threads, and the external threads are sleeved with the first nut 17 and the second nut 18; the first nut 17 is located above the sieve plate 14, the second nut 18 is located below the sieve plate 14, and the first nut 17 and the second nut 18 are arranged to fix the sieve plate 14 on the rotating rod 11. The connection mode is detachable connection, which can improve the flexibility of the equipment, facilitate the operator to replace the sieve plate 14 with different sizes of sieve holes 15 according to actual needs, and adjust the axial position of the sieve plate 14 on the rotating rod 11 according to actual needs. After adjustment, the first nut 17 and the second nut 18 cooperate with the threads on the rotating rod 11 to stably fix the sieve plate 14 on the rotating rod 11.
[0054] Further, as shown in Figure 3 The support 10 includes a first connecting rod 19, a second connecting rod 20 and a support disc 21, one end of the first connecting rod 19 and the second connecting rod 20 is connected with the equipment shell 3, and the other end is connected with the support disc 21, the motor 12 is arranged on the support disc 21, and the upper end of the support disc 21 is movably provided with a protective cover 22 which is conical; when the protective cover 22 covers the support disc 21, the protective cover 22 can hide the motor 12 inside. Specifically, the first connecting rod 19 and the second connecting rod 20 can stably support the support disc 21, so that the motor 12 on the support disc 21 can stably drive the rotating rod 11. It should be noted that in other embodiments, only one connecting rod can be provided, or even three connecting rods, four connecting rods, etc. can be provided, which is not limited here, as long as the purpose of sufficient support stability can be achieved.
[0055] The shape of the support disc 21 is not limited here and can be adjusted according to actual conditions. For example, the support 10 can be provided in a disc shape, the protective cover 22 is provided in a conical shape, the maximum cross section of the protective cover 22 is adapted to the size of the support 10, so that the protective cover 22 not only hides the motor 12 inside, but also avoids the accumulation of straw blocks above the protective cover 22 and above the support 10, which affects the crushing efficiency. The inside of the equipment shell 3 can be provided with a heating wire 23, which is arranged to dry the straw blocks and straw fragments; the upper part of the equipment shell 3 is provided with an exhaust port 24, and a fan 26 is arranged beside the exhaust port 24; the upper end of the equipment shell 3 is open, and the top movable cover is provided with an end cover 25. The heating wire 23 heats and dries the straw blocks and straw fragments inside the equipment, reduces the moisture content of the straw, and the uniform distribution of the heating wire 23 ensures that the heat can be uniformly transmitted to the inside of the equipment, improving the drying effect.
[0056] The fan 26 discharges the moisture and hot air in the device through the exhaust port 24, keeps the device dry and ensures the air circulation in the device, preventing the moisture from corroding and contaminating the device. The end cover 25 closes the upper end opening of the device shell 3, preventing dust, moisture and other impurities from entering the device, prolonging the service life of the device, and the movable arrangement of the end cover 25 makes the maintenance and cleaning of the device more convenient.
[0057] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that the structures or components illustrated in the drawings are not necessarily drawn to scale, and the present application omits the description of known components and processing techniques and processes to avoid unnecessary limitation of the present application.
Claims
1. A straw returning and crushing device, comprising a device housing (3), characterized in that, Also includes: A feeding component is provided on the equipment housing (3) for feeding straw. The feeding component is provided with a squeezing roller (1), which is configured to separate the moisture in the straw from the straw. A water collection tank (2) is installed inside the equipment housing (3). A filter plate (4) is installed on the top of the water collection tank (2). The water collection tank (2) is configured to guide the water separated by the extrusion roller (1) into its interior through the filter plate (4). The cutting component is disposed inside the equipment housing (3) and located beside the filter plate (4), and is configured to cut the squeezed straw. A crusher is disposed inside the housing (3) of the equipment and located below the cutter. The crusher is configured to crush the straw blocks cut by the cutter.
2. The straw returning and crushing equipment according to claim 1, characterized in that, The feed element has a trapezoidal cross-section, and the opening size gradually decreases from the outside to the inside.
3. The straw returning and crushing equipment according to claim 2, characterized in that, The feeder includes an upper plate (5) and a lower plate (6). The upper plate (5) is inclined downward from the outside to the inside, and the lower plate (6) is inclined downward from the outside to the inside. The inclination angle of the upper plate (5) is greater than that of the lower plate (6). The filter plate (4) is connected to the lower end of the lower plate (6).
4. The straw returning and crushing equipment according to claim 3, characterized in that, The filter plate (4) is horizontally arranged and detachably installed on the top of the water collection tank (2), and the bottom of the water collection tank (2) is provided with a drain outlet (7).
5. The straw returning and crushing equipment according to claim 1, characterized in that, The cutting component includes a first cutting roller (8) and a second cutting roller (9). The first cutting roller (8) is disposed on one side of the filter plate (4), and the side of the filter plate (4) away from the feed component is disposed at the same horizontal position as the first cutting roller (8). The first cutting roller (8) and the second cutting roller (9) are configured to rotate in a direction to cut the squeezed straw.
6. The straw returning and crushing equipment according to claim 1, characterized in that, The crushing component includes a support (10) and a rotating rod (11). A motor (12) is provided on the support (10). The output end of the motor (12) is connected to one end of the rotating rod (11). The motor (12) is configured to drive the rotating rod (11) to rotate. The rotating rod (11) is provided with several cutting blades (13).
7. The straw returning and crushing equipment according to claim 6, characterized in that, The rotating rod (11) is also provided with a sieve plate (14), which has a plurality of sieve holes (15). Each sieve hole (15) is of equal size. The sieve plate (14) is located below the cutting blade (13) and can rotate with the rotating rod (11). The bottom of the equipment housing (3) is provided with a discharge port (16), which is located below the sieve plate (14).
8. The straw returning and crushing equipment according to claim 7, characterized in that, The sieve plate (14) is provided with a through hole, the rotating rod (11) passes through the through hole, and the rotating rod (11) can slide within the through hole; The rotating rod (11) is provided with an external thread, and a first nut (17) and a second nut (18) are fitted on the external thread. The first nut (17) is located above the sieve plate (14), and the second nut (18) is located below the sieve plate (14). The first nut (17) and the second nut (18) are configured to jointly fix the sieve plate (14) on the rotating rod (11).
9. A straw returning and crushing device according to claim 6, characterized in that, The support member (10) includes a first connecting rod (19), a second connecting rod (20), and a support plate (21). One end of the first connecting rod (19) and the second connecting rod (20) are connected to the equipment housing (3), and the other end is connected to the support plate (21). The motor (12) is mounted on the support plate (21). A protective cover (22) is movably mounted on the upper end of the support plate (21). The protective cover (22) is conical. When the protective cover (22) is placed over the support plate (21), the protective cover (22) can conceal the motor (12) inside.
10. A straw returning and crushing device according to claim 1, characterized in that, A heating wire (23) is provided on the inner side of the equipment housing (3), and the heating wire (23) is configured to dry straw blocks and straw fragments; An exhaust port (24) is provided above the equipment housing (3), and a fan (26) is provided next to the exhaust port (24); The device housing (3) has an opening at the top and an end cap (25) on the top movable cover.