A rice harvester and harvesting method

Abstract

The present application relates to the technical field of rice harvesting, and particularly relates to a rice harvester and a harvesting method, which comprises a first shell and an inclined cylinder, the first shell is installed on a vehicle body, and the inclined cylinder is installed in the first shell; the rice harvester further comprises a conveying device, a screening device, a dust removal device, a rotating shaft, a cutter, a first spiral blade, a second spiral blade and a screen plate, the right end of the inclined cylinder is provided with a discharge port, the left end of the inclined cylinder is communicated with the conveying device, the conveying device is used for harvesting and conveying rice, the rotating shaft is rotatably installed in the inclined cylinder, a plurality of stepped surfaces are arranged on the rotating shaft, a plurality of groups of cutters are respectively installed on the outer sidewalls of different stepped surfaces of the rotating shaft, the first spiral blade is installed on the left part of the outer sidewall of the rotating shaft, and the second spiral blade is installed on the right part of the outer sidewall of the rotating shaft; the rice harvester can realize multiple beating separation of rice and multiple cutting and crushing of straw, improve the effect of collecting grains with different fullness degrees, improve the use convenience and reduce dust pollution.

Description

Technical Field

[0001] This invention relates to the technical field of rice harvesting, and in particular to a rice harvester and harvesting method. Background Technology

[0002] As one of the world's most important food crops, the efficiency and quality of rice harvesting directly affect food supply and agricultural production efficiency. Traditional manual harvesting methods are inefficient and labor-intensive. With the advancement of technology, mechanized harvesting technology has gradually become an important direction for the development of modern agriculture.

[0003] Currently, among existing rice harvesting equipment, such as the patent with authorization announcement number CN209824443U, this utility model addresses the shortcomings of existing rice harvesters, which directly bag the rice after threshing. However, freshly harvested rice contains moisture, and direct bagging can easily cause the rice to mold and taste bad. The present invention provides a rice harvester, which includes a harvester body, which includes at least a vehicle body, a threshing device, a rice storage tank, and a bagging device. The discharge end of the threshing device is connected to the rice storage tank.

[0004] However, during use, it was found that the harvester had low efficiency in separating rice grains and was not easy to automatically separate grains of different sizes, which reduced its ease of use. At the same time, it generated a lot of dust during harvesting, which reduced its environmental benefits. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a rice harvester and harvesting method that achieves multiple impacts to separate rice grains and multiple cutting and crushing of straw, improves the effect of separating and collecting grains with different grain plumpness, improves ease of use, and reduces dust pollution.

[0006] This invention discloses a rice harvester, comprising a first housing and an inclined cylinder. The first housing is mounted on a vehicle body, and the inclined cylinder is installed inside the first housing. It also includes a conveying device, a screening device, a dust removal device, a rotating shaft, cutting tools, a first spiral blade, a second spiral blade, and a screen plate. The right end of the inclined cylinder has a discharge port, and the left end of the inclined cylinder is connected to the conveying device, which is used for harvesting and conveying rice. The rotating shaft is rotatably mounted inside the inclined cylinder and has multiple stepped surfaces. Multiple sets of cutting tools are respectively mounted on the outer walls of different stepped surfaces of the rotating shaft. The first spiral blade is mounted on the rotating shaft. On the left side of the outer wall, the second spiral blade is installed on the right side of the outer wall of the rotating shaft. The screen plate is connected and set at the bottom of the inclined cylinder. A screening device is set inside the first housing. The screening device is used to screen the rice. A dust removal device is set on the first housing. The dust removal device is used to remove dust from the conveying device. The first housing is moved by the vehicle body, which in turn moves the conveying device. During the movement of the conveying device, the rice is harvested and cut. The cut rice enters the interior of the inclined cylinder. The rotating shaft drives multiple sets of cutters to move circumferentially, which beat the rice and separate the grains from the straw.

[0007] Preferably, the dust removal device includes a collection box, a collection hood, a conveying fan, a conveying pipe, a water spray pipe, a guide platform, third spiral blades, and a filter screen. The collection box is installed at the top of the first housing. The collection hood is connected to the conveying device. The filter screen is connected to the input end of the collection hood. The conveying fan is connected to the collection hood. The output end of the conveying fan is connected to the inside of the collection box through the conveying pipe. The water spray pipe is installed inside the collection box. The guide platform is installed at the bottom of the collection box. The third spiral blades are rotated and installed between the guide platforms. The conveying fan draws air into the collection hood, causing the collection hood to absorb the dust generated during rice harvesting. The absorbed dust is transported to the inside of the collection box through the conveying pipe. Water is sprayed into the collection box through the water spray pipe, causing the dust to settle. The mud formed after dust settling is guided to the bottom of the collection box through the guide platform. The mud is discharged outward by the rotation of the third spiral blades, thereby reducing dust pollution during rice harvesting and reducing equipment maintenance costs.

[0008] Preferably, the screening device includes a drive unit, a first sieve, a second sieve, a connector, a conveyor platform, a collection trough, and fourth spiral blades. The first sieve is located below the inclined cylinder, with its right end rotatably installed inside the first housing. The second sieve is located below the first sieve, with its right end rotatably installed inside the first housing. The left and right sides of the second sieve are configured with screens of different mesh sizes. The upper and lower ends of the connector are rotatably installed between the first and second sieves. A drive unit is installed on the first sieve to drive it to reciprocate. The conveyor platform is located at the bottom of the first housing, and two sets of collection troughs are respectively installed on the conveyor platform. Two sets of fourth spiral blades are rotatably installed in the two sets of collection troughs respectively. Grains in the inclined cylinder pass through the sieve. The mesh plate falls onto the first sieve, and the drive device drives the first sieve to swing up and down, causing the first sieve to vibrate and screen the grain. At this time, air is blown into the first shell, so that the wind force blows away impurities such as straw and husks mixed in with the grain. Then the grain passes through the first sieve and falls onto the second sieve. By gradually conveying the grain from right to left on the second sieve, the different mesh sizes of the screens on the second sieve first separate the small grain particles. The separated small grain particles fall onto the conveyor platform and enter the first set of collection troughs. Then the large grain particles fall onto the conveyor platform and enter the second set of collection troughs. The rotation of the two sets of fourth spiral blades conveys the grains of different sizes, thereby improving the convenience of separating and collecting grains of different sizes.

[0009] Preferably, the conveying device includes a cutting device, a second housing, a first sprocket, a first chain, a lever, a conveyor belt, and a conveyor plate. The second housing is installed on the outer wall of the first housing. Multiple notches are provided on the side of the second housing. Multiple sets of first sprockets are rotatably installed inside the second housing. Multiple sets of first chains are respectively fitted onto the multiple sets of first sprockets. Multiple sets of levers are respectively disposed on the multiple sets of first chains. The conveyor belt is rotatably installed inside the second housing. The conveyor plate is disposed on the outer wall of the conveyor belt. The cutting device is disposed inside the second housing and is used to cut the rice grains. When the first housing moves, it carries... The second housing moves, allowing rice grains to enter through the notch. At this time, multiple sets of first sprockets drive multiple sets of first chains to rotate, causing multiple sets of actuating rods to lift the rice grains. As the second housing continues to move forward, the cutting device cuts the bottom of the rice grains. The cut rice grains are then conveyed into the second housing through multiple sets of actuating rods. The rice grains inside the second housing fall onto the cutting device for further cutting. Subsequently, the cut rice grains fall onto the conveyor belt, where they are lifted upwards by the conveyor plate and conveyed into the inclined cylinder. This improves the effect of pre-cutting rice grains and straw, thereby improving the efficiency and effectiveness of grain separation.

[0010] Preferably, the cutting device includes a second sprocket, a second chain, a second cutter, and a third cutter. Multiple sets of second sprockets are rotatably installed inside the second housing. Multiple sets of second chains are respectively fitted onto the multiple sets of second sprockets, and the length direction of the multiple sets of second chains is consistent with the traveling direction of the rice harvester. Multiple sets of second cutters are respectively installed on the sides of the multiple sets of second chains, and multiple sets of third cutters are respectively installed on the upper part of the outer side wall of the multiple sets of second chains. The rotation of the multiple sets of second sprockets drives the multiple sets of second cutters and multiple sets of third cutters to move circumferentially, so that the multiple sets of second cutters cut and harvest the rice. The harvested rice falls onto the multiple sets of second chains, and the multiple sets of second cutters and multiple sets of third cutters cut the rice again, thereby improving the crushing effect of the rice and improving the working efficiency.

[0011] Preferably, the driving device includes a turntable and a support arm. The turntable is rotatably mounted on the first housing, and the bottom end of the support arm is rotatably mounted on the eccentric position of the turntable. The top end of the support arm is rotatably connected to the left side of the first sieve. The turntable drives the support arm to swing, which in turn drives the first sieve to swing up and down. At the same time, the first sieve drives the second sieve to swing up and down through the connecting piece, thereby improving the convenience of grain sieving.

[0012] Preferably, it also includes a blower and a discharge port, with the blower connected to the first housing and the discharge port connected to the first housing; by blowing air into the first housing through the blower, the effect of the grain wind screening in blowing and separating the straw is improved, and the separated straw is discharged outward through the blower.

[0013] Preferably, it also includes multiple sets of separating combs, all of which are installed on the outer wall of the second shell; the multiple sets of separating combs separate the rice grains, improving the convenience of cutting and conveying the rice grains into the gap of the second shell.

[0014] A preferred method for harvesting rice includes the following steps:

[0015] S1. Start the harvesting equipment and harvest according to the planned route. The harvested straw is laid out in the field, and the harvested grain is collected and stored separately according to two different sizes.

[0016] S2. After the initial impurity removal is completed, the harvester transports the impurity-removed rice to the drying machinery through its built-in conveying pipeline system. After the rice enters the drying machinery through the pipeline, it is evenly distributed in the drying chamber, preparing for the subsequent dehydration and drying operations.

[0017] S3. The drying machinery adopts hot air circulation drying technology. Hot air is generated by a heating device and circulates in the drying chamber, making full contact with the rice and removing the moisture from the rice.

[0018] S4. After a certain period of drying, a small amount of rice sample is taken out from the drying room and its moisture content is tested using a moisture meter. Once the grains meet the required drying standards, the dried rice is sent to the rice processing machine through a conveying pipeline.

[0019] S5. After the rice processing machine is started, the dried rice enters the rice milling area. The rice milling rollers grind the rice with appropriate pressure and speed to remove the outer shell of the rice. At the same time, the screening device inside the processing machine separates the milled rice from the rice husk. The rice husk is discharged for collection and reuse.

[0020] S6. The rice processed in S5 is packaged according to specifications; this significantly reduces the workload, transportation, storage, and transshipment in the later stages of rice harvesting, ensuring the quality and safety of the rice and providing fresh rice for the market.

[0021] Preferably, in step S3, during the drying process, temperature and humidity sensors monitor the temperature and humidity changes in the drying chamber in real time and feed the data back to the control system. The control system automatically adjusts the power of the heating device and the speed of the fan according to the preset drying parameters.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting multiple stepped surfaces on the rotating shaft, different blades can repeatedly strike and separate the rice and cut and crush the straw multiple times. Then, the crushed straw is discharged through the outlet by the rotation of the second spiral blade. The grains pass through the screen plate and fall onto the screening device, where the impurities in the grains are separated and removed again. At the same time, the screening device separates grains of different sizes, thereby improving the effect of separating and collecting grains with different grain fullness and improving the convenience of use. The dust removal device collects the dust during grain harvesting, thereby reducing dust pollution. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the isometric structure of the present invention;

[0024] Figure 2 This is an isometric structural diagram showing the connection between the collection hood and the conveying fan, etc.

[0025] Figure 3 This is a partial isometric structural diagram showing the connection between the rotating shaft and the second bolt blade, etc.

[0026] Figure 4 This is a partial isometric structural diagram of the connection between the conveying fan and the conveying pipe, etc.

[0027] Figure 5 This is a partial isometric structural diagram of the connection between the first chain and the actuating lever, etc.

[0028] Figure 6This is a partial isometric structural diagram of the connection between the first sprocket and the first chain, etc.

[0029] Figure 7 This is a partial isometric structural diagram of the connection between the second chain and the third cutting tool, etc.

[0030] Figure 8 This is a partial isometric structural diagram showing the connection between the first shell and the first sieve, etc.

[0031] Figure 9 This is a partial isometric structural diagram of the connection between the inclined cylinder and the screen plate, etc.

[0032] Figure 10 This is an isometric structural diagram showing the connection between the first shell and the second shell.

[0033] In the attached diagram, the following are the markings: 101, first housing; 102, inclined cylinder; 103, rotating shaft; 104, first cutter; 105, first helical blade; 106, second bolt blade; 107, screen plate; 201, collection box; 202, collection cover; 203, conveying fan; 204, conveying pipe; 205, water spray pipe; 206, guide platform; 207, third helical blade; 208, filter screen; 301, first sieve; 302, second sieve; 303... 304. Connector; 305. Conveyor table; 306. Collection trough; 307. Fourth spiral blade; 401. Second housing; 402. First sprocket; 403. First chain; 404. Actuating rod; 405. Conveyor belt; 406. Conveyor plate; 501. Second sprocket; 502. Second chain; 503. Second cutter; 504. Third cutter; 601. Turntable; 602. Support arm; 701. Blower; 702. Discharge port; 801. Separating comb. Detailed Implementation

[0034] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. Example

[0035] like Figures 1 to 10As shown, a rice harvester of the present invention includes a first housing 101 and an inclined cylinder 102. The first housing 101 is mounted on a vehicle body, and the inclined cylinder 102 is mounted inside the first housing 101. It also includes a conveying device, a screening device, a dust removal device, a rotating shaft 103, a blade 104, a first spiral blade 105, a second spiral blade 106, and a screen plate 107. The right end of the inclined cylinder 102 has a discharge port, and the left end of the inclined cylinder 102 is connected to the conveying device. The conveying device is used for harvesting and conveying rice. The rotating shaft 103 is rotatably mounted on the inclined cylinder. Inside the inclined cylinder 102, and on the rotating shaft 103, there are multiple stepped surfaces. Multiple sets of cutters 104 are respectively installed on the outer walls of different stepped surfaces of the rotating shaft 103. The first spiral blade 105 is installed on the left side of the outer wall of the rotating shaft 103, and the second spiral blade 106 is installed on the right side of the outer wall of the rotating shaft 103. The screen plate 107 is connected and installed at the bottom of the inclined cylinder 102. A screening device is installed inside the first housing 101. The screening device is used to screen rice. A dust removal device is installed on the first housing 101. The dust removal device is used to remove dust from the conveying device.

[0036] The dust removal device includes a collection box 201, a collection cover 202, a conveying fan 203, a conveying pipe 204, a water spray pipe 205, a guide platform 206, a third spiral blade 207, and a filter screen 208. The collection box 201 is installed at the top of the first housing 101. The collection cover 202 is connected to the conveying device. The filter screen 208 is connected to the input end of the collection cover 202. The conveying fan 203 is connected to the collection cover 202. The output end of the conveying fan 203 is connected to the inside of the collection box 201 through the conveying pipe 204. The water spray pipe 205 is installed inside the collection box 201. The guide platform 206 is installed at the bottom inside the collection box 201. The third spiral blade 207 is rotatably installed between the guide platforms 206.

[0037] In this embodiment, the vehicle body drives the first housing 101 to move, which in turn drives the conveying device to move. During the movement of the conveying device, the rice is harvested and cut. The cut rice enters the inclined cylinder 102. The rotating shaft 103 drives multiple sets of blades 104 to move circumferentially, causing the blades 104 to strike the rice and separate the grains from the straw. By setting multiple stepped surfaces on the rotating shaft 103, the different blades 104 can strike and separate the rice multiple times and cut and crush the straw multiple times. Then, the second spiral blade 106 rotates to discharge the crushed straw through the outlet. The grains pass through the screen plate 107 and fall onto the screening device, where impurities in the grains are separated and removed. At the same time, the screening device separates grains of different sizes, thereby improving the effect of separating and collecting grains with different grain fullness and improving the convenience of use. The dust removal device collects the dust during the harvesting of grains, thereby reducing dust pollution. Example

[0038] Based on Example 1, such as Figures 1 to 10 As shown, a rice harvester of the present invention includes a screening device comprising a drive device, a first screen 301, a second screen 302, a connector 303, a conveyor platform 304, a collection trough 305, and a fourth spiral blade 306. The first screen 301 is disposed below the inclined cylinder 102, with its right end rotatably mounted inside the first housing 101. The second screen 302 is disposed below the first screen 301, with its right end rotatably mounted inside the first housing 101, and the left and right parts of the second screen 302 are configured with screens of different mesh sizes. The upper and lower ends of the connector 303 are rotatably mounted between the first screen 301 and the second screen 302. The first screen 301 is provided with a drive device for driving the first screen 301 to swing back and forth. The conveyor platform 304 is disposed at the bottom of the first housing 101. Two sets of collection troughs 305 are respectively disposed on the conveyor platform 304, and two sets of fourth spiral blades 306 are respectively rotatably mounted inside the two sets of collection troughs 305.

[0039] The conveying device includes a cutting device, a second housing 401, a first sprocket 402, a first chain 403, a lever 404, a conveyor belt 405, and a conveyor plate 406. The second housing 401 is installed on the outer wall of the first housing 101. The second housing 401 has multiple notches on its side. Multiple sets of first sprockets 402 are rotatably installed inside the second housing 401. Multiple sets of first chains 403 are respectively fitted onto the multiple sets of first sprockets 402. Multiple sets of levers 404 are respectively arranged on the multiple sets of first chains 403. The conveyor belt 405 is rotatably installed inside the second housing 401. The conveyor plate 406 is arranged on the outer wall of the conveyor belt 405. The cutting device is arranged inside the second housing 401 and is used to cut the rice.

[0040] The cutting device includes a second sprocket 501, a second chain 502, a second cutter 503, and a third cutter 504. Multiple sets of second sprockets 501 are rotatably installed inside the second housing 401. Multiple sets of second chains 502 are respectively fitted onto multiple sets of second sprockets 501, and the length direction of multiple sets of second chains 502 is consistent with the walking direction of the rice harvester. Multiple sets of second cutters 503 are respectively installed on the side of multiple sets of second chains 502, and multiple sets of third cutters 504 are respectively installed on the upper part of the outer side wall of multiple sets of second chains 502.

[0041] The driving device includes a turntable 601 and a support arm 602. The turntable 601 is rotatably mounted on the first housing 101, the bottom end of the support arm 602 is rotatably mounted on the eccentric position of the turntable 601, and the top end of the support arm 602 is rotatably connected to the left side of the first sieve 301.

[0042] It also includes a blower 701 and a discharge port 702, with the blower 701 connected to the first housing 101 and the discharge port 702 connected to the first housing 101;

[0043] It also includes multiple sets of separation combs 801, all of which are installed on the outer wall of the second housing 401;

[0044] In this embodiment, the conveying fan 203 draws air into the collection hood 202, causing the collection hood 202 to absorb dust generated during rice harvesting. The absorbed dust is transported to the collection box 201 through the conveying pipe 204. Water is sprayed into the collection box 201 through the water spray pipe 205, causing the dust to settle. The resulting slurry is guided to the bottom of the collection box 201 by the guide platform 206. The slurry is then discharged outwards by the rotation of the third spiral blade 207, thereby reducing dust pollution during rice harvesting and lowering equipment maintenance costs. The grain in the inclined cylinder 102 passes through the screen plate 107 and falls onto the first screen 301. The drive device drives the first screen 301 to swing up and down, causing the first screen 301 to... The grain is vibrated and screened. At this time, air is blown into the first shell 101, so that the wind force blows away the impurities such as straw and husks mixed in with the grain. Then the grain passes through the first screen 301 and falls onto the second screen 302. By gradually conveying the grain from right to left on the second screen 302, the different mesh sizes of the screens on the second screen 302 first separate the small grain particles. The separated small grain particles fall onto the conveyor 304 and enter the first set of collection troughs 305. Then the large grain particles fall onto the conveyor 304 and enter the second set of collection troughs 305. The rotation of the two sets of fourth spiral blades 306 conveys the grains of different sizes, thereby improving the convenience of collecting grains of different sizes separately. Example

[0045] Based on Example 1, the present invention provides a rice harvesting method, comprising the following steps:

[0046] S1. Start the harvesting equipment and harvest according to the planned route. The harvested straw is laid out in the field, and the harvested grain is collected and stored separately according to two different sizes.

[0047] S2. After the initial impurity removal is completed, the harvester transports the impurity-removed rice to the drying machinery through its built-in conveying pipeline system. After the rice enters the drying machinery through the pipeline, it is evenly distributed in the drying chamber, preparing for the subsequent dehydration and drying operations.

[0048] S3. The drying machinery adopts hot air circulation drying technology. Hot air is generated by a heating device and circulates in the drying chamber, making full contact with the rice and removing the moisture from the rice.

[0049] S4. After a certain period of drying, a small amount of rice sample is taken out from the drying room and its moisture content is tested using a moisture meter. Once the grains meet the required drying standards, the dried rice is sent to the rice processing machine through a conveying pipeline.

[0050] S5. After the rice processing machine is started, the dried rice enters the rice milling area. The rice milling rollers grind the rice with appropriate pressure and speed to remove the outer shell of the rice. At the same time, the screening device inside the processing machine separates the milled rice from the rice husk. The rice husk is discharged for collection and reuse.

[0051] S6. Pack the rice processed in S5 according to the specifications.

[0052] In step S3, during the drying process, temperature and humidity sensors monitor the temperature and humidity changes in the drying chamber in real time and feed the data back to the control system. The control system automatically adjusts the power of the heating device and the speed of the fan according to the preset drying parameters. This significantly reduces the workload, transportation, storage, and transshipment volume in the later stages of rice harvesting, ensuring the quality and safety of the rice and providing fresh rice for the market.

[0053] The main functions achieved by this invention are:

[0054] 1. To achieve multiple impacts and separations of rice grains and multiple cuts and crushings of straw by different blades 104, thereby improving the effect of separating and collecting grains with different particle fullness.

[0055] 2. Convert the dust generated during rice harvesting into mud, thereby reducing dust pollution during rice harvesting and lowering equipment maintenance costs;

[0056] 3. When harvesting rice, first cut off the bottom of the rice grains, and then cut the rice grains into smaller pieces multiple times before separating them. This improves the convenience of separation and processing and increases work efficiency.

[0057] The rice harvester and harvesting method of this invention are all common mechanical methods in terms of installation, connection, or setting. Any method that can achieve the beneficial effect can be implemented. The rotating shaft 103, the third spiral blade 207, the fourth spiral blade 306, the first sprocket 402, the conveyor belt 405, the second sprocket 501, and the turntable 601 are all rotated by the harvester's transfer case, belt, and pulley transmission. The conveying fan 203 and the blower 701 of the rice harvester and harvesting method of this invention are commercially available. Those skilled in the art only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0058] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A rice harvester, comprising a first housing (101) and an inclined cylinder (102), the first housing (101) being mounted on a vehicle body, and the inclined cylinder (102) being mounted inside the first housing (101); characterized in that, It also includes a conveying device, a screening device, a dust removal device, a rotating shaft (103), a cutting tool (104), a first spiral blade (105), a second spiral blade (106), and a screen plate (107). The right end of the inclined cylinder (102) is provided with a discharge port, and the left end of the inclined cylinder (102) is connected to the conveying device. The conveying device is used to harvest and transport rice. The rotating shaft (103) is rotatably installed inside the inclined cylinder (102), and multiple stepped surfaces are provided on the rotating shaft (103). Multiple sets of cutting tools (104, 105, 106, 107) are also provided. 4) The first spiral blade (105) is installed on the outer side wall of the rotating shaft (103) on different stepped surfaces respectively, the second spiral blade (106) is installed on the right side of the outer side wall of the rotating shaft (103), the screen plate (107) is connected to the bottom end of the inclined cylinder (102), the first housing (101) is provided with a screening device, which is used to screen rice, and the dust removal device is set on the first housing (101), which is used to remove dust from the conveying device. The screening device includes a drive unit, a first sieve (301), a second sieve (302), a connector (303), a conveyor table (304), a collection trough (305), and a fourth spiral blade (306). The first sieve (301) is located below the inclined cylinder (102), and its right end is rotatably installed inside the first housing (101). The second sieve (302) is located below the first sieve (301), and its right end is rotatably installed inside the first housing (101). The left and right parts of the second sieve (302) are set with screens of different mesh sizes. Grains pass through the first sieve. The grain (301) falls onto the second sieve (302). The grain is gradually conveyed from right to left on the second sieve (302). The upper and lower ends of the connector (303) are rotatably installed between the first sieve (301) and the second sieve (302). A drive device is provided on the first sieve (301). The drive device is used to drive the first sieve (301) to swing back and forth. The conveyor platform (304) is located at the bottom of the first housing (101). Two sets of collection troughs (305) are respectively installed on the conveyor platform (304). Two sets of fourth spiral blades (306) are rotatably installed in the two sets of collection troughs (305). The conveying device includes a cutting device, a second housing (401), a first sprocket (402), a first chain (403), a lever (404), a conveyor belt (405), and a conveyor plate (406). The second housing (401) is installed on the outer wall of the first housing (101). The second housing (401) has multiple notches on its side. Multiple sets of first sprockets (402) are rotatably installed inside the second housing (401). Multiple sets of first chains (403) are respectively fitted onto the multiple sets of first sprockets (402). Multiple sets of levers (404) are respectively set onto the multiple sets of first chains (403). The conveyor belt (405) is rotatably installed inside the second housing (401). The conveyor plate (406) is set on the outer wall of the conveyor belt (405). The cutting device is set inside the second housing (401) and is used to cut the rice. The cutting device includes a second sprocket (501), a second chain (502), a second cutter (503), and a third cutter (504). Multiple sets of second sprockets (501) are rotatably installed inside the second housing (401). Multiple sets of second chains (502) are respectively fitted onto multiple sets of second sprockets (501), and the length direction of multiple sets of second chains (502) is consistent with the walking direction of the rice harvester. Multiple sets of second cutters (503) are respectively installed on the side of multiple sets of second chains (502), and multiple sets of third cutters (504) are respectively installed on the upper part of the outer side wall of multiple sets of second chains (502).

2. A rice harvester as described in claim 1, characterized in that, The dust removal device includes a collection box (201), a collection cover (202), a conveying fan (203), a conveying pipe (204), a water spray pipe (205), a guide platform (206), a third spiral blade (207), and a filter screen (208). The collection box (201) is installed at the top of the first housing (101). The collection cover (202) is connected to the conveying device. The filter screen (208) is connected to the input end of the collection cover (202). The conveying fan (203) is connected to the collection cover (202). The output end of the conveying fan (203) is connected to the inside of the collection box (201) through the conveying pipe (204). The water spray pipe (205) is installed inside the collection box (201). The guide platform (206) is installed at the bottom inside the collection box (201). The third spiral blade (207) is rotatably installed between the guide platforms (206).

3. A rice harvester as described in claim 1, characterized in that, The driving device includes a turntable (601) and a support arm (602). The turntable (601) is rotatably mounted on the first housing (101), and the bottom end of the support arm (602) is rotatably mounted on the eccentric position of the turntable (601). The top end of the support arm (602) is rotatably connected to the left side of the first sieve (301).

4. A rice harvester as described in claim 1, characterized in that, It also includes a blower (701) and a discharge port (702), with the blower (701) connected to the first housing (101) and the discharge port (702) connected to the first housing (101).

5. A rice harvester as described in claim 1, characterized in that, It also includes multiple sets of separation combs (801), all of which are installed on the outer wall of the second housing (401).

6. A method for harvesting rice, using the rice harvester according to any one of claims 1-5, comprising the following steps: S1. Start the harvester and harvest according to the planned route. The harvested straw is laid out in the field, and the harvested grain is collected and stored separately according to two different sizes. S2. After the initial impurity removal is completed, the harvester transports the impurity-removed rice to the drying machinery through its built-in conveying pipeline system. After the rice enters the drying machinery through the pipeline, it is evenly distributed in the drying chamber, preparing for the subsequent dehydration and drying operations. S3. The drying machinery adopts hot air circulation drying technology. Hot air is generated by a heating device and circulates in the drying chamber, making full contact with the rice and removing the moisture from the rice. S4. After a certain period of drying, a small amount of rice sample is taken out from the drying room and its moisture content is tested using a moisture meter. Once the grains meet the required drying standards, the dried rice is sent to the rice processing machine through a conveying pipeline. S5. After the rice processing machine is started, the dried rice enters the rice milling area. The rice milling rollers grind the rice with appropriate pressure and speed to remove the outer shell of the rice. At the same time, the screening device inside the processing machine separates the milled rice from the rice husk. The rice husk is discharged for collection and reuse. S6. Pack the rice processed in S5 according to the specifications. In step S3, during the drying process, temperature and humidity sensors monitor the temperature and humidity changes in the drying chamber in real time and feed the data back to the control system. The control system automatically adjusts the power of the heating device and the speed of the fan according to the preset drying parameters.

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