Pneumatic centralized-arrangement type dense-planting seeder for wheat

Abstract

The utility model relates to the field of seeding, in particular to a wheat pneumatic centralized-arrangement type close planting seeding machine which comprises a machine frame, a pneumatic conveying system is arranged on the machine frame, and a seed box is assembled on the machine frame. The pneumatic conveying system comprises a speed regulating fan, the speed regulating fan is arranged at the front end of the frame body and is connected with a mixer through a pipeline, the top end of the mixer is connected with an outer grooved wheel seed-metering device through a pipeline, the outer grooved wheel seed-metering device is connected with the bottom of a seed box, and the seed box is fixed on the frame body of the seeder through a box body bracket. A seed supply shaft of the outer grooved wheel seed-metering device is connected with a stepping motor, the stepping motor is fixedly mounted at the bottom of the seed box, the right end of the mixer is connected with a corrugated pipe through a bent pipe, a distributor is mounted at the upper end of the corrugated pipe, and an annular proximity switch is mounted at a seed guide pipe at an outlet of the distributor. The wheat centralized row type close planting seeder can improve the seeding speed and solve the problem of poor seeding quality.

Description

Technical Field

[0001] The utility model relates to the field of planting machinery, in particular to a pneumatic collective row type dense planting seeder for wheat. Background Art

[0002] The pneumatic seeder is an electric-driven pneumatic conveying system introduced on the basis of the traditional wheat seeder. It can improve the sowing efficiency and quality of the equipment to achieve precision sowing. The sowing density and sowing depth are adjustable. The device includes speed-regulating fans, power systems, control systems, seeding systems and other components. The electric drive is used to control the fan frequency and the stepper motor speed to match to achieve more accurate sowing operations. The electric-driven pneumatic conveying system can improve the speed and reliability of sowing, while reducing labor costs. It is one of the increasingly important technological trends in modern industrial production. However, the traditional electric-driven pneumatic conveying system usually uses a single stable air flow rate to transport wheat seeds. In this way, the sowing speed of wheat seeds can only be adjusted by a single wheat seed dropping speed. The adjustment is single, and the wheat seeds are easily piled up, causing the existing wheat seeder to sow unevenly at high speeds and the sowing quality is relatively poor. The wheat sowing quality directly affects the wheat yield. Utility Model Content

[0003] (I) Technical problems to be solved: The purpose of the utility model is to provide a pneumatic dense planting seeder for wheat to improve the sowing efficiency and sowing quality, reduce the cost of the seeder, and meet the requirements of dense planting of wheat.

[0004] (II) Technical solution: To achieve the above-mentioned purpose, the utility model provides a pneumatic concentrated row type dense planting seeder for wheat, including a frame, a pneumatic conveying system is arranged on the frame, and a seed box is installed on the frame; the pneumatic conveying system includes a speed-regulating fan, which is arranged at the front end of the frame, and the speed-regulating fan is connected to the mixer through a pipeline, and the top of the mixer is connected to the outer groove wheel seeding device through a pipeline, and the outer groove wheel seeding device is connected to the bottom of the seed box, and the seed box is fixed to the seeder frame through a box bracket. The seed supply shaft of the outer groove wheel seeding device is connected to the stepper motor, and the stepper motor is fixedly installed at the bottom of the seed box. The right end of the mixer is connected to the corrugated pipe through a curved pipe, and a distributor is installed at the upper end of the corrugated pipe. A ring proximity switch is installed at the seed guide pipe at the distributor outlet.

[0005] Preferably, a cross beam is provided at the front end of the frame, a triangular suspension frame is provided above the cross beam, and the frame is connected to the traveling mechanism through the triangular suspension frame; a bulldozer mechanism is provided below the cross beam, and the pneumatic conveying system is located behind the triangular suspension; a seed box is provided above the pneumatic conveying system; a plurality of double-disc openers are provided in the middle of the frame, a drip irrigation belt mechanism for laying the drip irrigation belt is provided at one end of the frame, the drip irrigation belt mechanism is located behind the pneumatic conveying system, and a soil covering mechanism is provided at the rear end of the frame; a controller is provided on the frame, and the pneumatic conveying system is electrically connected to the controller.

[0006] Preferably, the distributor outlet is connected to a seed guide tube, which is connected to the seed discharge port of the double disc opener. Below the middle crossbeam of the double disc opener frame, 12 groups are evenly distributed in two rows with a horizontal distance of 100 mm.

[0007] Preferably, two groups of 12V batteries are installed on the front end crossbeam of the frame, which are fixedly installed on the front end crossbeam of the frame on the right side of the speed-regulating fan; and an inverter is fixedly installed on the left side crossbeam of the frame of the speed-regulating fan.

[0008] Preferably, the bulldozer mechanism comprises a V-shaped bulldozer blade, both sides of which are hinged to the cross beam via a bulldozer connecting plate, a hydraulic rod is provided in the middle of the bulldozer blade, a piston rod of the hydraulic rod is hinged to the bulldozer blade, and the hydraulic rod is hinged to the cross beam.

[0009] Preferably, the drip irrigation tape mechanism includes a drip irrigation bracket, which is arranged on a cross beam, a rotating shaft for placing the drip irrigation tape roll is rotatably arranged on the top of the drip irrigation bracket, drip irrigation tape retaining rings are installed at both ends of the rotating shaft, a guide ring is installed on the drip irrigation bracket, a booster spring is installed in the middle of the drip irrigation bracket, a roller for limiting the drip irrigation tape is arranged at the bottom end of the drip irrigation bracket, and covering wheels are installed on both sides behind the roller.

[0010] Preferably, the soil covering mechanism includes a soil covering rod, shock absorbing modules are installed on both sides of the soil covering rod, the shock absorbing modules on both sides are hinged to the soil covering frame through shock absorbing connecting plates, and a sprocket is installed on the mounting shaft on one side of the soil covering rod; a pressing roller is installed behind the soil covering rod, and the pressing roller is hinged to the soil covering frame through roller connecting plates on both sides, and a plurality of anti-skid belts are arranged on the outer circumference of the pressing roller, and a scraper plate is fixedly installed behind the pressing roller through a mounting plate. A soil covering motor is fixedly installed on one side of the soil covering frame through a mounting plate, and a sprocket is fixedly installed on the output shaft of the soil covering motor.

[0011] Preferably, the controller is installed on one side of the front end of the frame beam and includes a 51 single chip microcomputer for adjusting the stepper motor and a frequency converter for adjusting the speed regulating fan.

[0012] Based on the above-mentioned wheat pneumatic row-type dense planting seeder, the following steps are included:

[0013] The seeder is connected to the traveling device through a triangular suspension frame and placed on the ground; the traveling device drives the frame to move, the hydraulic rod extends, the bulldozer is placed on the ground, and the bulldozer moves forward to level the land and large pieces of soil.

[0014] The speed regulating motor drives the outer groove wheel seed meter to discharge the seeds from the seed box quantitatively and evenly. The speed regulating fan is operated through two groups of 12V batteries connected in series through the inverter. The airflow and the wheat seeds are evenly mixed in the mixer to form an air-seed two-phase flow. The seeds are further mixed when passing through the corrugated pipe and transported to the distributor. The distributor evenly distributes the seeds to the seed guide tube, and the seeds enter the seed discharge port of the double disc opener through the seed guide tube to achieve sowing.

[0015] The controller adjusts the frequency of the speed-regulating fan according to the speed of the stepper motor connected to the outer groove wheel seeding device to determine the seeding amount, and coordinates the air flow speed with the seeding amount to avoid seed congestion due to low wind speed during sowing and seed collision and breakage due to high wind speed.

[0016] The drip irrigation tape roll wrapped on the rotating shaft is wrapped around the roller at the bottom of the drip irrigation tape drip irrigation bracket through the guide ring. The covering wheel behind the roller covers the drip irrigation tape with soil. In order to prevent wind damage and reduce water evaporation, the drip irrigation tape needs to be covered with a 3 to 5 cm soil layer. For this purpose, a spring booster device is added, and the covering wheel and the roller are designed as a floating structure, which can be automatically adjusted according to terrain fluctuations.

[0017] The soil covering rod covers and buries the upper soil of the gully after the double disc opener and the drip irrigation belt laying mechanism pass, covers the seeds and levels the land surface, and the pressing roller compacts the upper soil. The soil covering rod adopts the driving roller method, and uses the soil covering motor and chain to provide power to drive the soil covering rod to rotate. There are shock absorbing modules on both sides, which can move in contour on the ground of different heights.

[0018] (III) Beneficial effects: 1. When the pneumatic concentrated row type dense planting seeder for wheat is used, the airflow and wheat seeds are evenly mixed in the mixer to form an air-seed two-phase flow. By using a speed-regulating fan, the size of the airflow input into the mixer can be adjusted, so that the speed of seed entry can be effectively controlled; the right end of the mixer is connected to the bellows through a bend pipe. When the airflow drives the wheat seeds to be transported in the bellows, not only will the airflow itself be affected by the curved corrugations and fluctuate, but the seeds will also move along the inner wall of the tube after passing through the bend. When the seeds are attached to the inner wall of the bellows, they will vibrate and mix more with the airflow, so that the seeds are mixed more evenly when passing through the bellows, and then the uniform wheat seeds are transported to the distributor. In addition, the seed guide tube of this patent is provided with an annular proximity switch to monitor the sowing situation in real time, and missed sowing can be found in time during the sowing process, further improving the sowing quality.

[0019] 2. The utility model matches the seeding speed of the outer groove wheel with the airflow speed of the speed-regulating fan through a single-chip microcomputer and a frequency converter, so as to avoid seed congestion due to too low wind speed and seed collision and crushing due to too high wind speed; two groups of 12V batteries are connected to the inverter to drive the fan to operate, so as to realize continuous and stable operation of the fan and improve the sowing quality.

[0020] 3. The utility model adopts an electrically driven soil covering roller to ensure stable and high-quality soil covering and land surface leveling for surface seeds. The soil covering mechanism of the drip irrigation belt of the utility model adopts a spring pressurization method to automatically adjust according to terrain fluctuations, so that the drip irrigation belt is always covered with a layer of 3 to 5 cm, effectively preventing wind damage and reducing water evaporation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the wheat pneumatic row-type dense planting seeder;

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of part of the pneumatic conveying system in the utility model;

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the soil covering mechanism in the utility model;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the drip irrigation tape laying mechanism in the utility model.

[0026] Marking in the figure

[0027] 1. Frame, 11. Frame, 12. Crossbeam, 13. Inverter, 14. Controller, 15. Triangular suspension, 16. 12V battery, 17. Box support, 18. Seed box, 19. Double disc furrow opener;

[0028] 2. bulldozer mechanism, 21. bulldozer blade, 22. hydraulic rod, 23. bulldozer connecting plate;

[0029] 3. Pneumatic conveying system, 31. Speed-adjustable fan, 32. Mixer, 33. External groove wheel seed meter, 34. Stepper motor, 35. Seed supply pipeline, 36. Bend pipe, 37. Bellows, 38. Distributor, 39. Ring proximity switch, 310. Seed guide tube;

[0030] 4. Drip irrigation belt laying mechanism, 41. Drip irrigation bracket, 42. Rotating shaft, 43. Drip irrigation belt retaining ring, 44. Guide ring, 45. Pressure boosting spring, 46. Roller, 47. Covering wheel;

[0031] 5. Soil covering mechanism, 51. Soil covering rod, 52. Shock absorbing module, 53. Shock absorbing connecting plate, 54. Soil covering frame, 55. Sprocket, 56. Suppression roller, 57. Roller connecting plate, 58. Anti-skid belt, 59. Scraper plate, 510. Soil covering motor, 511. Sprocket. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] In the specific design, such as Figure 1 As shown, a pneumatic concentrated row type dense planting seeder for wheat includes a frame 1. The frame is a frame structure that provides support for the seeder. A fixed crossbeam 12 is arranged in the frame structure of the frame. A triangular suspension frame 15 is arranged above the crossbeam. The frame is connected to a traveling mechanism through the triangular suspension frame. The traveling mechanism can be selected from an existing tractor. A hydraulic cylinder is arranged on the tractor to drive the frame 1 to rise and fall, and the frame 1 drives the entire seeder to rise and fall. A bulldozer mechanism 2 is arranged below the crossbeam, and a bulldozer 21 moves forward to level the land and large pieces of soil. A pneumatic conveying system 3 is arranged on the frame. The pneumatic conveying system 3 is located behind the triangular suspension 15. The pneumatic conveying system 3 is used to supply, convey and evenly distribute seeds. A seed box 18 is arranged above the pneumatic conveying system 3. A plurality of double disc openers 19 are arranged in the middle of the frame 11. The double disc openers 19 are connected to a distributor 38 through a seed guide pipe 310 for sowing. A drip tape mechanism 4 for laying a drip tape is provided at one end of the frame 11, and the drip tape mechanism 4 is located behind the pneumatic conveying system 3. A soil covering mechanism 5 is provided at the rear end of the frame 11; a controller 14 is provided on the frame 11, and the pneumatic conveying system 3 is electrically connected to the controller 14. The controller 14 controls the rotation speed of the stepping motor 34 and the speed regulating fan 31 to match them.

[0034] like Figure 2 As shown, the pneumatic conveying system 3 includes a speed-regulating fan 31, which is arranged at the front end of the frame 11. The speed-regulating fan 31 is connected to the mixer 32 through a pipeline. The top of the mixer 32 is connected to the outer groove wheel seed meter 33 through a seed supply pipeline 35. The outer groove wheel seed meter 33 is connected to the bottom of the seed box 18, and the seed box 18 is fixed to the seeding machine frame 11 through a box bracket 17. The seed supply shaft of the outer groove wheel seed meter 33 is connected to the stepper motor 34, and the stepper motor 34 is fixedly installed at the bottom of the seed box 18. The right end of the mixer 32 is connected to the bellows 37 through a curved pipe 36. The upper end of the bellows 37 is equipped with a distributor 38. The distributor outlet seed guide pipe 310 is equipped with an annular proximity switch 39. The annular proximity switch 39 monitors the sowing status in real time.

[0035] The outlet of the distributor 38 is connected to a seed guide tube 310, which is connected to the seed opening of the double disc opener 19 for sowing. The double disc opener 19 is installed below the crossbeam 12 in the middle of the frame 11 and is divided into 12 groups evenly distributed in two rows with a horizontal distance of 100 mm.

[0036] Two groups of 12V batteries 16 are installed on the front cross beam 12 of the frame body, which are fixedly installed on the front cross beam 12 of the frame body on the right side of the speed regulating fan 31; an inverter 13 is fixedly installed on the left cross beam 12 of the frame body of the speed regulating fan 31. The speed regulating fan 31 is connected to the inverter 13 through two groups of 12V batteries 16 to drive the speed regulating fan 31 to run, so as to achieve stable airflow output.

[0037] The bulldozer mechanism 2 includes a V-shaped bulldozer blade 21, both sides of which are hinged to the cross beam 12 via a bulldozer connecting plate 23. A hydraulic rod 22 is provided in the middle of the bulldozer blade 21, a piston rod of the hydraulic rod 22 is hinged to the bulldozer blade 21, and the hydraulic rod 22 is hinged to the cross beam 12. The hydraulic rod 22 is used to adjust the height of the bulldozer blade 21.

[0038] The drip irrigation tape laying mechanism 4 includes a drip irrigation bracket 41, which is arranged on the frame cross beam 12. A rotating shaft 42 for placing the drip irrigation tape roll is rotatably arranged on the top of the drip irrigation bracket 41. Drip irrigation tape retaining rings 43 are installed at both ends of the rotating shaft 42. A guide ring 44 is installed on the drip irrigation bracket 41. A booster spring 45 is installed in the middle of the drip irrigation bracket 41. In order to prevent wind damage and reduce water evaporation, the drip irrigation tape needs to be covered by a 3 to 5 cm soil layer, and a spring booster 45 device is added for this purpose. A roller 46 for limiting the drip irrigation tape is arranged at the bottom of the drip irrigation bracket 41, and soil covering wheels 47 are installed on both sides of the rear of the roller. The soil covering wheel 47 and the roller 46 are designed as a floating structure, which can be automatically adjusted according to terrain fluctuations.

[0039] The soil covering mechanism 5 includes a soil covering rod 51, and shock absorbing modules 52 are installed on both sides of the soil covering rod 51. The shock absorbing modules 52 on both sides are hinged to the soil covering frame 54 through shock absorbing connecting plates 53. A sprocket 55 is installed on the mounting shaft on one side of the soil covering rod 51. A soil covering motor 510 is fixedly installed on one side of the soil covering frame 54 through a mounting plate. A sprocket 511 is fixedly installed on the output shaft of the soil covering motor 510. The soil covering rod 51 adopts a driving roller method, and uses the soil covering motor 510 and a chain to provide power to drive the soil covering rod 51 to rotate. A pressing roller 56 is installed at the rear of the soil covering rod 51. The two sides of the pressing roller 56 are hinged to the soil covering frame 54 through roller connecting plates 57. A plurality of anti-skid belts 58 are arranged on the outer circumference of the pressing roller 56. A scraper plate 59 is fixedly installed at the rear of the pressing roller 56 through a mounting plate.

[0040] The controller 14 is installed on one side of the front end of the frame cross beam 12 and includes a 51 single chip microcomputer for adjusting the stepping motor 34 and a frequency converter for adjusting the speed regulating fan 31 .

[0041] Based on the above-mentioned wheat pneumatic row-type dense planting seeder, the following steps are included:

[0042] The seeder is connected to the traveling device through the triangular suspension frame 15, and the seeder is placed on the ground; the traveling device drives the frame 11 to move, the hydraulic rod 22 is extended, the bulldozer 21 is placed on the ground, and the bulldozer 21 moves forward to level the land and large pieces of soil.

[0043] The stepper motor 34 drives the outer groove wheel seed metering device 33 to uniformly and quantitatively discharge the seeds from the seed box 18. The speed-regulating fan 31 is operated through two sets of 12V batteries 16 connected in series through the inverter 13. The airflow and the wheat seeds are uniformly mixed in the mixer 32 to form an air-seed two-phase flow. The seeds are further mixed when passing through the bellows 37 and transported to the distributor 38. The distributor 38 evenly distributes the seeds to the seed guide tube 310. The seeds pass through the seed guide tube 310 and enter the seed discharge port of the double disc furrow opener 19 to achieve sowing.

[0044] The controller 14 adjusts the frequency of the speed-regulating fan 31 according to the rotation speed of the stepper motor 34 connected to the outer groove wheel seeding device 33 to determine the seeding amount, and coordinates the air flow speed with the seeding amount to avoid seed congestion due to low wind speed during sowing and seed collision and crushing due to high wind speed.

[0045] The drip irrigation tape roll wound on the rotating shaft 42 is wound on the roller 46 at the bottom of the drip irrigation tape drip irrigation bracket 41 through the guide ring 44, and the covering wheel 47 behind the roller 46 covers the drip irrigation tape with soil. In order to prevent wind damage and reduce water evaporation, the drip irrigation tape needs to be covered with a 3 to 5 cm soil layer. For this purpose, a booster spring 45 device is added, and the covering wheel 47 and the roller 46 are designed to be a floating structure, which can be automatically adjusted according to terrain fluctuations.

[0046] The soil covering rod 51 covers the upper soil of the gully after the double disc furrow opener 19 and the drip irrigation belt laying mechanism 4 pass, covers the seeds and levels the land surface, and the pressing roller 56 compacts the upper soil. The soil covering rod 51 adopts a driving roller method, and uses the motor 510 to provide power to drive the soil covering rod 51 to rotate. There are shock absorbing modules 52 on both sides, which can move on the ground of different heights.

[0047] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

Claims

1. A wheat pneumatic concentrated row type dense planting seeder, comprising a frame (1), the frame (1) being provided with a pneumatic conveying system (3), and the frame (1) being provided with a seed box (18); characterized in that: The pneumatic conveying system (3) comprises a speed-regulating fan (31), the speed-regulating fan (31) being arranged at the front end of the frame body (11) of the frame (1), the speed-regulating fan (31) being connected to a mixer (32) via a pipeline, the top end of the mixer (32) being connected to an outer groove wheel seed meter (33) via a pipeline, the outer groove wheel seed meter (33) being connected to the bottom of the seed box (18), the seed supply shaft of the outer groove wheel seed meter (33) being drivingly connected to a stepping motor (34), the right end of the mixer (32) being connected to a corrugated pipe (37) via a curved pipe (36), the upper end of the corrugated pipe (37) being provided with a distributor (38), and an annular proximity switch (39) being provided at the seed guide pipe (310) at the outlet of the distributor (38).

2. A wheat pneumatic row-type dense planting seeder according to claim 1, characterized in that: A crossbeam (12) is provided at the front end of the frame (11) of the frame (1), a triangular suspension (15) is provided above the crossbeam (12), and the frame (1) is connected to the walking mechanism via the triangular suspension (15); a bulldozer mechanism (2) is provided below the crossbeam (12), and the pneumatic conveying system (3) is located behind the triangular suspension (15); a seed box (18) is provided above the pneumatic conveying system (3), and the seed box (18) is fixed to the frame (11) via a box bracket (17). The frame (11) is provided with a plurality of double disc furrow openers (19) in the middle part, a drip irrigation tape laying mechanism (4) for laying a drip irrigation tape is provided at one end of the frame (11), the drip irrigation tape laying mechanism (4) is located behind the pneumatic conveying system (3), and a soil covering mechanism (5) is provided at the rear end of the frame (11); a controller (14) is provided on the frame (11), the pneumatic conveying system (3) is electrically connected to the controller (14), and the stepping motor (34) is fixedly installed at the bottom of the seed box (18).

3. A wheat pneumatic row-type dense planting seeder according to claim 2, characterized in that: The outlet of the distributor (38) is connected to a seed guide tube (310), which is connected to a seed discharge port of the double disc furrow opener (19). The double disc furrow opener (19) is located below the crossbeam (12) in the middle of the frame (11) and is divided into two rows of 12 groups evenly distributed at a horizontal distance of 100 mm.

4. A wheat pneumatic row-type dense planting seeder according to claim 2, characterized in that: The cross beam (12) at the front end of the frame (11) is equipped with two groups of 12V storage batteries (16), which are fixedly mounted on the cross beam (12) at the front end of the frame (11) on the right side of the speed regulating fan (31); and an inverter (13) is fixedly mounted on the cross beam (12) at the left side of the speed regulating fan (31).

5. A wheat pneumatic row-type dense planting seeder according to claim 2, characterized in that: The bulldozer mechanism (2) comprises a V-shaped bulldozer blade (21), both sides of the bulldozer blade (21) being hinged to the cross beam (12) via bulldozer connecting plates (23), a hydraulic rod (22) being arranged in the middle of the bulldozer blade (21), a piston rod of the hydraulic rod (22) being hinged to the bulldozer blade (21), and the hydraulic rod (22) being hinged to the cross beam (12).

6. A wheat pneumatic row-type dense planting seeder according to claim 2, characterized in that: The drip irrigation tape laying mechanism (4) comprises a drip irrigation bracket (41), the drip irrigation bracket (41) being arranged on the crossbeam (12), a rotating shaft (42) for placing a drip irrigation tape roll being rotatably arranged at the top of the drip irrigation bracket (41), drip irrigation tape retaining rings (43) being installed at both ends of the rotating shaft (42), a guide ring (44) being installed on the drip irrigation bracket (41), a pressure-boosting spring (45) being installed in the middle of the drip irrigation bracket (41), a roller (46) for limiting the position of the drip irrigation tape being arranged at the bottom end of the drip irrigation bracket (41), and soil covering wheels (47) being installed at both sides behind the roller (46).

7. A wheat pneumatic row-type dense planting seeder according to claim 2, characterized in that: The soil covering mechanism (5) comprises a soil covering rod (51), shock absorbing modules (52) are installed on both sides of the soil covering rod (51), the shock absorbing modules (52) on both sides are hinged to the soil covering frame (54) of the soil covering mechanism via shock absorbing connecting plates (53), and a sprocket is installed on a mounting shaft on one side of the soil covering rod (51); a pressing roller (56) is installed behind the soil covering rod (51), the pressing roller (56) is hinged to the soil covering frame (54) of the soil covering mechanism via roller connecting plates (57), a plurality of anti-skid belts (58) are arranged on the outer circumference of the pressing roller (56), and a scraper plate (59) is fixedly installed behind the pressing roller (56) via a mounting plate; a soil covering motor (510) is fixedly installed on one side of the soil covering frame (54) of the soil covering mechanism via a mounting plate, and a sprocket is fixedly installed on the output shaft of the soil covering motor (510).

8. The wheat pneumatic row-type dense planting seeder according to claim 2, characterized in that: The controller (14) is mounted on the front side of the crossbeam (12) of the frame (11), and comprises a 51 single chip microcomputer for adjusting the stepping motor (34) and a frequency converter for adjusting the speed regulating fan (31).

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