A spiral conveyor seeder and its usage method and application

Abstract

The present invention relates to the field of agricultural planting, and specifically discloses a spiral conveyor seeder and its use method and application. The spiral conveyor seeder includes: a frame, a seed box, a seed metering device, a seed dropping device and a driving device. The seed metering device includes: a vertical pipe fixing seat, a support vertical pipe, a seed metering sleeve, a seed metering rotating shaft and a seed taking auger; the seed dropping device includes: a seed dropping driving shaft, a first bevel gear, a second bevel gear, a seed dropping pipe, a seed guiding pipe, a seed dropping rotating shaft and a seed dropping auger. The seed metering device of the invention uses a spiral auger structure for seed metering, which has a simple structure and low cost. By reasonably setting the parameters of the seed taking auger, the seed metering device has the advantages of no seed jamming and no seed damage. The seed dropping device uses the propulsion principle of the spiral auger to push the seeds and release them into the soil. At the same time, since the seed dropping pipe moves with the seeder to form a sowing groove, the soil automatically flows back to cover the seeds after sowing, eliminating the need for a furrowing device and a soil covering device in a general seeder.

Description

Technical Field

[0001] The present invention belongs to the technical field of agricultural seeding devices and seeding technologies, and particularly relates to a spiral conveyor seeder and its use method and application. Background Art

[0002] In the process of crop seeding, seeds are separated from the cluster and sown into the soil at a certain plant spacing and row spacing and a predetermined soil penetration depth, and then covered with soil. At present, ridge planting is generally adopted in dry land. Ridge planting is beneficial to drainage, irrigation, and also beneficial to mechanized operations.

[0003] Existing ridge seeding machines generally include structures such as a frame, a rotary tillage device, a ridging device, a seed metering device, a seeding device, and a furrowing and soil covering device. For example, in the patent "A pneumatic needle-type single-seed precision seeder" (202010988823.5), this patent adopts the planetary wheel dibbling full-constraint seed guiding principle, which can achieve full constraint with local degrees of freedom for the seed guiding and transporting process from leaving the seed suction needle to falling into the seedbed soil, reduce the bouncing and sliding of seeds and the seedbed soil, and has high seed dropping accuracy and good seeding quality. However, the overall structure of this device is relatively complex, the cost is high, and it is not conducive to popularization and application. On the other hand, seeds fall into the soil by their own gravity, and some seeds will be exposed on the soil surface, and a soil covering device needs to be equipped at the same time to well meet the seeding requirements. Adding a soil covering device not only increases the volume of the seeder, but also increases the energy consumption of the seeder.

[0004] In this application, a seed metering device and a seeding device with a shared power are provided. Among them, the seed metering device uses a spiral auger structure for seed metering, which has a simple structure, low cost, and has advantages such as non-seed jamming and non-seed damage by reasonably setting the parameters of the spiral auger. The seeding device uses the propulsion principle of the spiral auger to push and release the seeds into the soil, so that the seeds are not easily exposed on the soil surface. The overall structure of the seeder is simple and compact, and the manufacturing cost is lower, which is conducive to popularization and application. Summary of the Invention

[0005] The purpose of the present invention is to provide a spiral conveyor seeder and its use method and application, so as to overcome the defects of the existing seeder with a complex structure, high cost, and being not conducive to popularization and application.

[0006] To achieve the above purpose, the present invention provides a spiral conveyor seeder, including a frame, a seed box, a seed metering device, a seeding device, and a driving device,

[0007] The seed metering device includes: a supporting vertical pipe, a seed metering sleeve, a seed metering rotating shaft, and a seed taking auger;

[0008] The top of the supporting vertical pipe is communicated with the seed outlet of the seed box; the seed discharging sleeve transversely penetrates through the supporting vertical pipe and extends to both sides of the supporting vertical pipe. An inoculation port is arranged at the upper part of the seed discharging sleeve, and seed discharging ports are arranged at the lower parts of both ends. The inoculation port is arranged inside the supporting vertical pipe and corresponds to the seed outlet of the seed box; the seed discharging ports are respectively arranged at both ends of the seed discharging sleeve; the seed discharging rotating shaft is arranged inside the seed discharging sleeve, and at least one end extends outside the seed discharging sleeve and is in transmission connection with the driving device; the seed taking auger is fixed on the outer periphery of the seed discharging rotating shaft. The starting end of the seed taking auger is flush with the edge of the inoculation port of the seed discharging sleeve or slightly retracted inward, and the ending end of the seed taking auger is arranged in the middle of the seed discharging port of the seed discharging sleeve.

[0009] The seed discharging device includes: a seed discharging driving shaft, a first bevel gear, a second bevel gear, a seed discharging pipe, a seed guiding pipe, a seed discharging rotating shaft and a seed taking auger.

[0010] The seed discharging driving shaft is parallel to the seed discharging rotating shaft of the seed discharging device and is connected with the output power of the driving device through a transmission device. The first bevel gear is fixed on the seed discharging driving shaft; the lower half part of the seed discharging rotating shaft is inserted into the seed discharging pipe. The lower end of the seed discharging rotating shaft is flush with the lower end of the seed discharging pipe or slightly retracted inward. The upper end of the seed discharging rotating shaft extends outside the seed discharging pipe and is in transmission connection with the first bevel gear through the second bevel gear; the seed taking auger is arranged on the outer periphery of the lower part of the seed discharging rotating shaft and inside the seed discharging pipe; a seed guiding port is arranged on one side of the upper part of the seed discharging pipe, and the seed guiding pipe is fixed at the seed guiding port. The other end of the seed guiding pipe is connected with the seed discharging port of the seed discharging device through a connecting pipe.

[0011] Preferably, a pushing auger is further fixed on the outer periphery of the seed discharging rotating shaft inside the inoculation port. The pushing auger includes a left-handed pushing auger and a right-handed pushing auger. The connection point of the left-handed pushing auger and the right-handed pushing auger is aligned with the midpoint of the inoculation port. The ending ends of the left-handed pushing auger and the right-handed pushing auger are respectively spaced apart from the starting end of the seed taking auger.

[0012] Preferably, the seed taking auger and / or the seed discharging auger is a double helix auger. The purpose of setting the double helix auger is to increase the continuity of seed discharging.

[0013] Preferably, there are multiple groups of the seed discharging devices. The seed discharging rotating shafts of multiple groups of seed discharging devices are connected through a coupling or share a seed discharging rotating shaft.

[0014] Preferably, there are multiple groups of the seed discharging devices. A plurality of first bevel gears are arranged at intervals on the seed discharging driving shaft, and the installation directions of adjacent two first bevel gears are opposite. Such a setting is more beneficial to the force balance of the seed discharging driving shaft.

[0015] Preferably, the seeding tubes of multiple groups of seeding devices are fixed on seeding tube fixed shafts and connected to the frame through the seeding tube fixed shafts, and the seeding tubes are arranged in an inclined shape and form an angle of 30-60° with the ground to reduce forward resistance and reduce weed entanglement.

[0016] Preferably, a second bevel gear is installed on the top of the seeding shaft, the neck is fixed to the frame through a bearing and a limit spring, and the lower part passes through a bearing fixed to the top of the seeding tube and is inserted into the seeding tube. A limit spring is installed on the seeding shaft to prevent it from moving up and down.

[0017] Preferably, it also includes a rotary tilling device and a ridging device, the rotary tilling device is arranged at the front part of the frame, the seed discharge device is fixed above the rear end of the rotary tilling device, and the seed placement device is arranged behind the rotary tilling device; the ridging device is arranged on both sides of the seed placement device and behind the rotary tilling device, the front ends of the ridging inclined plate and the ridging vertical plate are fixed to the shell of the rotary tilling device, the ridging inclined plate is arranged on the inner side of the ridging vertical plate and close to the seed placement device, and the ridging inclined plate is inclined from bottom to top toward the seed placement device.

[0018] Another technical solution of the present application: the above-mentioned spiral conveyor seeder is used for sowing rice, wheat, corn or soybeans.

[0019] Another technical solution of the present application: the sowing method of the above-mentioned spiral conveyor seeder comprises:

[0020] S1. When the weather is fine, use a high-powered rotary tiller to till the farmland, break up the soil, and remove the previous stubble and weeds;

[0021] S2. Seed preparation: Dry seeds can be sown directly; seeds that need to be soaked for germination should have a bud length of less than 1 mm and should be dried before sowing;

[0022] S3 sowing and planting: sowing in the field prepared in step S1; after the seeder enters the field, the seeds are loaded into the seed box, according to the preset sowing amount, the drive gear is adjusted, the rotary tiller is started, and then the drive power is started, and then the tractor drives the seeder forward to achieve ridge sowing;

[0023] S4. When the machine stops and reverses, turn off the drive device of the planter;

[0024] S5. When rotating, adjust the tractor's position so that the edge of the rotary tiller is aligned with the half-width furrow opened in the last operation to avoid overlapping and gaps caused by back and forth operations, so as to form complete furrows and furrow surfaces and realize furrow cultivation.

[0025] Compared with the existing technology, the present invention has the following beneficial effects:

[0026] 1. The seeding device of the present invention adopts a spiral auger structure for seeding, which has a simple structure and low cost. In addition, by reasonably setting the seeding auger and the seeding auger, it has the advantages of no seed jamming and no seed damage. The seeding device of the present invention uses the propulsion principle of the spiral auger to propel and release the seeds into the soil. At the same time, due to the movement of the seeding tube with the seeder and the stirring action of the seeding auger, the soil automatically flows back and covers the seeds, eliminating the ditching device and soil covering device of the general seeder, making the seeder of the present invention more compact and lighter in weight to adapt to smaller fields.

[0027] 2. The seeding device and the seed placing device of the present invention are connected by transmission and share power, which can not only save the setting of the driving device, but also ensure the synchronization of seeding and seed guiding, which is conducive to accurate seeding. The overall structure of the seeding machine is simple and reasonable, durable, low in cost, and is conducive to promotion and application.

[0028] 3. When sowing with this seeder, the seeds enter the soil under the push of the sowing auger, and the soil separated by the sowing tube automatically flows back to cover the sown seeds, without the need to dig trenches and cover the soil. At the same time, compared with the method of using furrowing plows to dig trenches, part of the moisture in the soil can be preserved, and the seeds germinate and grow in moist soil, which is beneficial to improve the survival rate of the seeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the spiral conveying seeder of the present invention.

[0030] Figure 2 It is a structural schematic diagram of the seeding device of the present invention.

[0031] Figure 3 It is a structural schematic diagram of the seeding sleeve of the present invention.

[0032] Figure 4 It is a structural schematic diagram of the seed arrangement rotating shaft of the present invention.

[0033] Figure 5 It is a structural schematic diagram of the following device of the present invention.

[0034] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure.

[0035] Description of main reference numerals:

[0036] 1. Frame; 2. Seed box; 3. Seed metering device; 31. Support vertical pipe; 311. Seed discharging port; 312. Seed discharging cover; 32. Seed metering sleeve; 321. Seed inoculation port; 322. Seed metering port; 33. Seed metering rotating shaft; 34. Seed taking auger; 35. Propelling auger; 351. Left-handed propelling auger; 352. Right-handed propelling auger; 36. Vertical pipe fixing seat; 4. Seed dropping device; 41. Seed dropping driving shaft; 42. First bevel gear; 43. Second bevel gear; 44. Seed dropping pipe; 441. Seed guiding port; 45. Seed guiding pipe; 46. Seed dropping rotating shaft; 47. Seed dropping auger; 48. Seed dropping pipe fixing shaft; 5. Driving device; 6. Rotary tillage device; 7. Ridging device; 71. Ridging inclined plate; 72. Ridging vertical plate; 8. Coupling; 9. Bearing; 10. Flexible hose. Detailed implementation manners

[0037] The following will combine with the accompanying drawings to describe in detail the detailed implementation manners of the present invention. However, it should be understood that the protection scope of the present invention is not limited by the detailed implementation manners.

[0038] As Figures 1-6 shown, a spiral conveyor type seeder includes a frame 1, a seed box 2, a seed metering device 3, a seed dropping device 4, a driving device 5, a rotary tillage device 6 and a ridging device 7. The rotary tillage device 6 is arranged at the front of the frame 1 and is used for loosening the soil. The seed box 2 is arranged above the frame 1 and is used for storing seeds to be sown. The seed metering device 3 is arranged below the seed box 2 and is used for orderly and evenly discharging the seeds in the seed box 2. The seed dropping device 4 is arranged below the seed metering device 3 and behind the rotary tillage device 6 and is used for sowing the seeds discharged by the seed metering device 3 into the soil. By improving the mechanism of the seed dropping device 4, the ditching device and the soil covering device of a general seeder are omitted, so that the structure of the seeder of the present invention is more compact and the weight is reduced, and a tractor with a smaller horsepower can be used to drive it.

[0039] Combined with Figures 2-4 , the seed metering device 3 includes: a support vertical pipe 31, a seed metering sleeve 32, a seed metering rotating shaft 33, a seed taking auger 34, a propelling auger 35 and a vertical pipe fixing seat 36. Multiple groups of the seed metering device 3 are provided.

[0040] Specifically, the vertical pipe fixing seat 36 is welded on the frame 1 at intervals, and the lower part of the support vertical pipe 31 is inserted into the vertical pipe fixing seat 36 and fixed to the vertical pipe fixing seat 36 by a horizontally arranged top screw. The support vertical pipe 31 and the vertical pipe fixing seat 36 are locked or loosened with a top screw, and can be rotated left and right and moved up and down, which is convenient for installation and disassembly. The top of the support vertical pipe 31 is connected with the seed outlet of the seed box 2. The seed discharge sleeve 32 passes through the upper middle part of the support vertical pipe 31 horizontally and extends to both sides of the support vertical pipe 31. The seed discharge sleeve 32 is provided with an inoculation port 321 at the upper part and a seed discharge port 322 at the lower part. The inoculation port 321 is arranged in the support vertical pipe 31, and the seed discharge port 322 is respectively arranged on both sides of the seed discharge sleeve 32. The seed discharge shaft 33 is arranged in the seed discharge sleeve 32, and at least one end extends to the outside of the seed discharge sleeve 32 and is transmission-connected to the drive device 5. In this embodiment, the seeding shafts 33 of multiple seeding devices 3 are connected by couplings 8, and only the outermost seeding shafts 33 are connected to the driving device 5. The independent design of the seeding device 3 is conducive to the maintenance and replacement of the equipment. Of course, in other embodiments, multiple seeding devices 3 can also share a seeding shaft 33.

[0041] Combination Figure 4 The seeding auger 34 is fixed on the outer periphery of the seeding shaft 33, the starting end of the seeding auger 34 is flush with the edge of the inoculation port 321 of the seeding sleeve 32 or slightly indented inward, and the ending end of the seeding auger 34 is arranged in the seeding port 322 of the seeding sleeve 32. That is, the seeding auger 34 rotates with the seeding shaft 33, transports the seeds from the inoculation port 321 to the seeding port 322, and discharges the seeds from the seeding port 322. The seeding auger 34 is a double-helix auger. The setting of the double-bolt auger is conducive to improving the sowing efficiency. The starting end of the seeding auger 34 is flush with the edge of the inoculation port 321 of the seeding sleeve 32 or slightly indented inward, which is conducive to preventing the seeds from getting stuck. Preferably, a propulsion auger 35 is also fixed on the outer periphery of the seeding shaft 33 in the inoculation port 321, and the propulsion auger 35 includes a left-hand propulsion auger 351 and a right-hand propulsion auger 352, the connection point of the left-hand propulsion auger 351 and the right-hand propulsion auger 352 is aligned with the middle point of the inoculation port 321, and the starting ends of the left-hand propulsion auger 351 and the right-hand propulsion auger 352 are tightly connected, and the end ends of the left-hand propulsion auger 351 and the right-hand propulsion auger 352 are respectively spaced from the starting end of the seeding auger 34. The propulsion auger 35 can stir the seeds discharged from the seed box 2 into the support vertical pipe 31 to prevent the seeds from being blocked due to movement after gathering. At the same time, the left-hand propulsion auger 351 and the right-hand propulsion auger 352 can push the seeds into the seeding sleeves 32 on both sides of the support vertical pipe 31, which is conducive to improving the seeding efficiency and better force.

[0042] Further, a seed discharging port 311 and a detachable seed discharging cover 312 are provided on one side of the lower part of the supporting vertical pipe 31. The seed discharging port 311 is arranged below the seed discharging sleeve 32. The diameter of the seed discharging sleeve 32 is smaller than that of the supporting vertical pipe 31. The redundant seeds in the seed box 2 can be discharged through the seed discharging port 311. Preferably, a guiding plate can be arranged in the supporting vertical pipe 31, and the lower end of the baffle plate is flush with the lower edge of the seed discharging port 311, and the seeds in the seed discharging sleeve 32 are guided to the seed discharging port 311 through the seed guiding plate. After sowing, the seed discharging port 311 is opened, and the redundant seeds can be discharged.

[0043] Combined with Figures 5-6 , the seeding device 4 includes: a seeding drive shaft 41, a first bevel gear 42, a second bevel gear 43, a seeding pipe 44, a seed guiding pipe 45, a seeding rotating shaft 46 and a seeding auger 47.

[0044] Specifically, the seeding drive shaft 41 is parallel to the seeding rotating shaft 33 of the seeding device 3 and is in transmission connection with the seeding rotating shaft 33 of the seeding device 3 through a transmission device. The first bevel gear 42 is fixed on the seeding drive shaft 41; the seeding rotating shaft 46 is arranged in the seeding pipe 44, the lower end of the seeding rotating shaft 46 is flush with or slightly retracted inside the lower end of the seeding pipe 44, and the upper end of the seeding rotating shaft 46 extends outside the seeding pipe 44 and is in transmission connection with the first bevel gear 42 through the second bevel gear 43. That is, through bevel gear transmission, the power of the horizontally arranged seeding drive shaft 41 is transmitted to the vertically arranged seeding rotating shaft 46. Of course, other existing transmission mechanisms can also be used to realize the reversing transmission of power. In this embodiment, there are multiple groups of the seeding devices 4, and multiple groups of seeding devices 4 share one seeding drive shaft 41. That is, a plurality of first bevel gears 42 are arranged at intervals on the seeding drive shaft 41. Preferably, the installation directions of two adjacent first bevel gears 42 are opposite. Correspondingly, two adjacent second bevel gears 43 and seeding rotating shafts 46 are respectively installed inside two first bevel gears. The opposite installation directions of two adjacent first bevel gears 42 are more conducive to the force balance of the seeding drive shaft 41. The spiral direction of the seeding auger corresponds to the gear rotation direction to ensure that the seeds in the seeding pipe move downward.

[0045] Specifically, a second bevel gear 43 is installed at the top of the seeding rotating shaft 46. The neck is fixed to the frame 1 through a bearing 9 and a limit snap ring. The lower part passes through the bearing 9 fixed at the top end of the seeding tube 44 and is inserted into the seeding tube 44. The seeding rotating shaft 46 is connected to the frame 1 through a bearing 9 and a limit snap ring. The overall structure of the seeding rotating shaft 46 is relatively stable and not prone to shaking. On one side of the upper part of the seeding tube 44, there is a seed guiding port 441. A seed guiding tube 45 is fixed at the seed guiding port 441. The other end of the seed guiding tube 45 is connected to the seed discharging port 322 of the seed discharging device 3 through a telescopic hose 10. The seeding tubes 44 of multiple groups of seeding devices 4 are fixed on a seeding tube fixing shaft 48 and are connected to the frame 1 through the seeding tube fixing shaft 48. And the seeding tubes 44 are arranged obliquely and form an angle of 30 - 60° with the ground to reduce the forward resistance and reduce weed entanglement.

[0046] Combined with Figure 5 , the seeding auger 47 is arranged on the outer periphery of the lower part of the seeding rotating shaft 46 and inside the seeding tube 44. The seeding auger 47 is a double - helix auger. The seeds inside the seeding tube 44 are discharged into the soil under the propulsion of the seeding auger 47. The seeds will not jump and are not easily exposed on the soil surface. At the same time, due to the movement of the seeding tube 44 along with the seeder and the stirring action of the seeding auger 47, the soil automatically flows back and covers the seeds, eliminating the need for the ditching device and soil covering device of a general seeder, making the structure of the seeder of the present invention more compact and reducing the weight, and reducing energy consumption.

[0047] In this embodiment, the seed box 2 is several used 15L mineral water buckets, which are directly inserted upside - down on the support vertical pipe 31 after the bottom is broken open. Of course, in other embodiments, a seed trough with an open upper end can also be used. The bottom of the seed trough is conical, and multiple seed discharging sockets are arranged at intervals. These seed discharging sockets are respectively inserted into the support vertical pipes 31 of the seed discharging device 3. The rotary tillage device 6 is purchased from the market and includes structures such as a soil retaining plate, a rotating shaft, and rotary tillage blades. The ridging device 7 is installed on both sides of the seeding device 4 and behind the rotary tillage device 6. The ridging device 7 includes ridging inclined plates 71 and ridging vertical plates 72 arranged at intervals. The front ends of the ridging inclined plates 71 and ridging vertical plates 72 are fixed to the housing of the rotary tillage device 6. The ridging inclined plates 71 are arranged inside the ridging vertical plates 72 and close to the seeding device 4. The ridging inclined plates 71 are inclined upward towards the seeding device 4. That is, the distance between the ridging inclined plates 71 and the lower part of the ridging vertical plates 72 is smaller than that of the upper part. A connecting rod can be further installed at the upper part of the ridging inclined plates 71 and ridging vertical plates 72 for further fixation to make the overall structure more stable.

[0048] Of course, a fertilizing device and / or a spraying device, etc. can also be configured on the seeder according to seeding needs. The fertilizer can be solid fertilizer or water fertilizer.

[0049] The method of sowing rice with the spiral conveyor seeder specifically comprises the following steps:

[0050] S1. When the weather is fine, use a high-powered rotary tiller to till the farmland, break up the soil, and remove previous crops and weeds.

[0051] S2. Seed preparation: Dry seeds can be sown directly; for rice seeds that need to be soaked and germinated, the sprout length should be less than 1 mm and can be sown after drying.

[0052] S3. Sowing and planting: Sowing is carried out in the field prepared in step S1; after the seeder enters the field, the seeds are loaded into the seed box 2, and the gear of the drive device 5 is adjusted according to the preset sowing amount, the rotary tiller is started first, and then the power of the drive device 5 is started, and then the tractor drives the seeder forward to achieve ridge sowing.

[0053] S4. When the machine is stopped and moving backwards, switch off the drive device 5 of the seed drill.

[0054] S5. When rotating, adjust the tractor's position so that the edge of the rotary tiller is aligned with the half-width furrow opened in the last operation to avoid overlapping and gaps caused by back and forth operations, so as to form complete furrows and furrow surfaces and realize furrow cultivation.

[0055] When sowing with the seeder, the seeds enter the soil under the push of the seeding auger 47, and the soil separated by the seeding tube 44 automatically flows back to cover the sown seeds, without the need to dig furrows and cover the soil. At the same time, compared with the method of digging furrows with a furrowing plow, part of the moisture in the soil can be preserved, and the seeds germinate and grow in the moist soil, which is beneficial to improving the survival rate of rice seeds.

[0056] In summary, the seeding device 3 of the invention adopts a spiral auger structure for seeding, which has a simple structure and low cost, and has the advantages of no seed jamming and no seed damage by reasonably setting the seeding auger 47. The seeding device 4 uses the propulsion principle of the spiral auger to propel and release the seeds into the soil, so that the seeds are not easily exposed on the soil surface; at the same time, due to the movement of the seeding tube 44 with the seeder and the stirring action of the seeding auger 47, the soil automatically flows back and covers the seeds, eliminating the ditching device and soil covering device of the general seeder.

[0057] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. A spiral conveyor seeder, comprising a frame, a seed box, a metering device, a seeding device and a driving device, characterized in that, The seed metering device includes: a supporting vertical pipe, a seed metering sleeve, a seed metering rotating shaft, and a seed taking auger; The top of the supporting vertical pipe is communicated with the seed outlet of the seed box; the seed metering sleeve transversely penetrates through the supporting vertical pipe and extends to both sides of the supporting vertical pipe. An inoculation port is provided on the upper part of the seed metering sleeve, and seed metering ports are provided at the lower parts of both ends. The inoculation port is arranged inside the supporting vertical pipe and corresponds to the seed outlet of the seed box; the seed metering ports are respectively arranged at both ends of the seed metering sleeve; the seed metering rotating shaft is arranged inside the seed metering sleeve, and at least one end extends outside the seed metering sleeve and is in transmission connection with the driving device; the seed taking auger is fixed on the outer periphery of the seed metering rotating shaft. The starting end of the seed taking auger is flush with the edge of the inoculation port of the seed metering sleeve or slightly indented inward, and the ending end of the seed taking auger is arranged in the middle of the seed metering port of the seed metering sleeve; The seed feeding device includes: a seed feeding driving shaft, a first bevel gear, a second bevel gear, a seed feeding pipe, a seed guiding pipe, a seed feeding rotating shaft, and a seed feeding auger; The seed feeding driving shaft is parallel to the seed metering rotating shaft of the seed metering device and is connected to the output power of the driving device through a transmission device. The first bevel gear is fixed on the seed feeding driving shaft; the lower half of the seed feeding rotating shaft is inserted into the seed feeding pipe. The lower end of the seed feeding rotating shaft is flush with the lower end of the seed feeding pipe or slightly retracted inward. The upper end of the seed feeding rotating shaft extends outside the seed feeding pipe and is in transmission connection with the first bevel gear through the second bevel gear; the seed feeding auger is arranged on the outer periphery of the lower part of the seed feeding rotating shaft and inside the seed feeding pipe; a seed guiding port is provided on one side of the upper part of the seed feeding pipe, and the seed guiding pipe is fixed at the seed guiding port. The other end of the seed guiding pipe is connected to the seed metering port of the seed metering device through a connecting pipe.

2. The spiral conveyor seeder according to claim 1, characterized in that, A propulsion auger is also fixed on the outer periphery of the seed metering rotating shaft inside the inoculation port. The propulsion auger includes a left-handed propulsion auger and a right-handed propulsion auger. The connection point of the left-handed propulsion auger and the right-handed propulsion auger is aligned with the midpoint of the inoculation port. The ending ends of the left-handed propulsion auger and the right-handed propulsion auger are respectively spaced apart from the starting end of the seed taking auger.

3. The spiral conveyor seeder according to claim 1, characterized in that, The seed taking auger and / or the seed feeding auger is a double helix auger.

4. The spiral conveyor seeder according to claim 1, characterized in that, There are multiple groups of the seed metering devices. The seed metering rotating shafts of multiple groups of seed metering devices are connected through a coupling or share a seed metering rotating shaft.

5. The spiral conveyor seeder according to claim 1, characterized in that, There are multiple groups of the seed feeding devices. Multiple first bevel gears are arranged at intervals on the seed feeding driving shaft, and the installation directions of adjacent two first bevel gears are opposite.

6. The spiral conveyor seeder according to claim 5, characterized in that, The seed feeding pipes of multiple groups of seed feeding devices are fixed on a seed feeding pipe fixing shaft and are connected to the frame through the seed feeding pipe fixing shaft. Moreover, the seed feeding pipes are arranged in an inclined shape and form an angle of 30 - 60° with the ground.

7. The spiral conveyor seeder according to claim 5, characterized in that, The second bevel gear is installed at the top of the seed feeding rotating shaft, and the neck is fixed on the frame through a bearing and a limit snap ring. The lower part passes through the bearing fixed at the top end of the seed feeding pipe and is inserted into the seed feeding pipe.

8. The spiral conveyor seeder according to claim 1, characterized in that, It also includes a rotary tilling device and a ridging device, wherein the rotary tilling device is arranged at the front part of the frame, the seed discharge device is fixed above the rear end of the rotary tilling device, and the seed placement device is arranged behind the rotary tilling device; the ridging device is arranged on both sides of the seed placement device and behind the rotary tilling device, and the ridging device includes a ridging inclined plate and a ridging vertical plate, the front ends of the ridging inclined plate and the ridging vertical plate are fixed to the shell of the rotary tilling device, the ridging inclined plate is arranged on the inner side of the ridging vertical plate and close to the seed placement device, and the ridging inclined plate is inclined from bottom to top toward the seed placement device.

9. The spiral conveyor seeder according to any one of claims 1-8 is used for sowing rice, wheat, corn or soybeans.

10. A method of sowing using the spiral conveyor seeder according to any one of claims 1-8, characterized in that, include: S1. When the weather is fine, use a high-powered rotary tiller to till the farmland, break up the soil, and remove the previous stubble and weeds; S2. Seed preparation: Dry seeds can be sown directly; seeds that need to be soaked for germination should have a bud length of less than 1 mm and should be dried before sowing; S3 sowing and planting: sowing in the field prepared in step S1; after the seeder enters the field, the seeds are loaded into the seed box, according to the preset sowing amount, the drive gear is adjusted, the rotary tiller is started, and then the drive power is started, and then the tractor drives the seeder forward to achieve ridge sowing; S4. When the machine stops and reverses, turn off the drive device of the planter; S5. When rotating, adjust the tractor's position so that the edge of the rotary tiller is aligned with the half-width furrow opened in the last operation to avoid overlapping and gaps caused by back and forth operations, so as to form complete furrows and furrow surfaces and realize furrow cultivation.

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