CN207733229U - High-pressure pneumatic blows non-ground contact type feed mechanism for seed - Google Patents

Abstract

The utility model discloses a high-pressure pneumatic blowing non-ground-touching seed metering device belonging to the technical field of agricultural machinery; comprising: a blowing system, a seed storage system, a seed picking system and a transmission system; wherein the blowing system is installed on the top of the seed storage system , The seed picking system is installed inside the seed storage system, the transmission system passes through the seed storage system and the blowing system, and forms a rotating pair with the seed storage system. The main feature of the utility model is that the pneumatic structure is introduced into the seeding process, and the seeds with a certain initial speed are directly driven into the unditched soil by adding high-speed airflow to the seeds to increase the seeding speed of the seed metering device; The blowing system is separated from the seed storage system, and is only connected with the seed blowing pipe. When the seed metering device is not discharging seeds, the air flow does not enter the seed metering device, thus avoiding the disturbance of the air flow to the seeds in the seed metering device when the seed metering device is not performing seeding. Thereby improving the precision of seeding, making the seeding operation accurate and reliable.

Description

High-pressure pneumatic blowing non-touching seed meter

technical field

The utility model relates to the technical field of agricultural machinery, in particular to a high-pressure pneumatic blowing non-ground-touching seed metering device.

Background technique

As the core component of the corn planter, the seed metering device is the key to increasing the density of corn planting in my country, and it is of great significance to improving the yield of corn per unit area and the level of corn planting in my country. Pneumatic seed metering device can effectively avoid reseeding, missing seeding and seed crushing that often occur in mechanical seed metering device, and its performance is relatively advanced. In the existing pneumatic seed metering device, the pneumatic power is mainly used in the process of filling, clearing and carrying seeds, while the seed metering is mainly based on the free fall of gravity. For example, Chinese Patent No. CN201110276013.8 "Inner Filling Corn Seed Meter", a pit is made at the bottom of the inner hole so that a seed entering the inner hole is not easy to drop when the rotation speed of the seed metering wheel is low. At the same time, an interference groove is made on the side wall of the shell corresponding to the seed cleaning area, so that when the seed wheel rotates at a high speed, the seeds stuck in the filling hole can fall out smoothly after being disturbed Fill holes to reduce the rate of double or multiple grains. For example, Chinese Patent No. CN200620024364.4 "Precise Corn Seed Meter" provides a brush that rotates in the same direction as the seed wheel, so that the seeds can be evenly rolled into the socket of the seed meter, and the seeds can be accurately entered into the ditch. Another example is the Chinese Patent No. CN922387801.8 "Precise Corn Seed Meter", which provides a precision corn seed meter, which is a formed seeder component with four specifications, which can be sown according to corn, beans and other crops The national standard plant spacing or the use of seeders with different agronomic requirements and different transmission ratios can make the sowing of corn, beans and other crops realize hole sowing and precision, and the structure is simple, and the seeding is accurate and reliable. When these three kinds of seed meters are used for seeding, the seeds mainly fall into the seed ditch by their own gravity, and the ditch needs to be opened before seeding.

Utility model content

The purpose of this utility model is to address the deficiencies proposed in the background technology at present, and propose a high-pressure pneumatic blowing non-ground-touching seed metering device, including: a blowing system, a storage system, a picking system and a transmission system; wherein the blowing system Installed on the top of the seed storage system, the picking system is installed inside the seed storage system, the transmission system passes through the seed storage system and the blowing system, and forms a rotating pair with the seed storage system;

The blowing system includes: an air intake pipe, an exhaust hood, a seed blowing pipe and a nozzle, wherein the exhaust hood is a thin-walled circular groove, which is installed on the top of the seeding upper casing of the seed picking system through an external connecting column, and the bottom of the exhaust hood There is an exhaust hood shaft hole in the middle, and an exhaust hood air hole is opened on one side of the bottom of the exhaust hood; the intake pipe is made of a straight upper part and a lower circular plate with holes, and the lower circular plate with holes is bolted to the row. On the top of the wind hood, the upper straight tube is connected with the external air pump; the seed blowing pipe is a bent pipe with a bend in the middle, and a nozzle is installed in the vertical direction outside the nozzle at the bottom of the seed blowing pipe, and the top nozzle of the seed blowing pipe is fixed on the The bottom of the exhaust hood and facing the air holes of the exhaust hood;

The seed storage system includes: an upper seeding casing, a lower seeding casing and a seeding pipe; the upper seeding casing includes a seeding pipe, a circular plate, a cylinder and an outer connecting column, the bottom surface of the circular plate and the cylinder The top surface of the circular plate is fixed, the outer diameter of the circular plate and the cylinder are the same, and there is a blowing tube hole on the circular plate that allows the blowing tube to pass through; the seeding tube is installed on the upper surface of the circular plate and is located on the other side of the blowing tube One side, and a hole matching the inner diameter of the bottom surface of the seed injection tube is punched on the circular plate; one end of the outer connecting column is fixedly connected to the upper surface of the circular plate, and the other end is bolted to the exhaust hood; there is an upper hole in the middle of the circular plate Housing shaft hole; the lower housing for seeding is a circular plate with a lower housing shaft hole in the middle, and a circular groove in the middle of the upper surface. The depth of the circular groove is equal to the depth of the seeding plate. There is a seed tube hole at the corresponding position at the bottom of the circular groove, the axis of the seed tube hole and the axis of the nozzle are on the same line in the vertical direction, and a row is installed at the position of the seed tube hole under the seed tube hole. The seed tube; the cylinder is bolted to the lower seeding casing through bolts, and the seed storage bin is surrounded by the upper seeding casing and the lower seeding casing; the lower seeding casing is bolted to the frame of the seeder;

The transmission system includes: an elastic cylindrical pin, a windshield disk, a transmission shaft and a seeding disk, wherein ten windshield disk holes are evenly opened in the windshield disk, and ten stable blocks are evenly installed on the outside of the upper surface of the windshield disk , and is located outside the hole of the wind-shielding disk; the position of each stabilizing block corresponds to the position of a wind-shielding disk hole; the wind-shielding disk is located in the exhaust hood; Shaped seed discharge port; the windshield disk is pinned to the upper half of the transmission shaft through elastic cylindrical pins, the seed discharge disk is bolted to the lower half of the transmission shaft, and the transmission shaft passes through the shaft hole of the lower housing sequentially from bottom to top , the shaft hole of the upper casing and the shaft hole of the exhaust hood, and form a rotating pair with the lower casing of the seed row; the seed row is located in the circular groove of the lower casing of the seed row; the lower end of the transmission shaft is equipped with a sprocket The drive system of the wheel and the planter constitutes a chain drive.

The seed picking system includes: a seed scraping board, a seed pushing board and a side baffle for pushing seeds. The seed scraping board is composed of arc-shaped strips, short fixing ears and long fixing ears, wherein the outside of the arc-shaped strips is arc-shaped, The short fixed ears and the long fixed ears are respectively affixed to the outer side of the arc, and the seed scraping plate is bolted to the upper surface of the lower casing of the seed row through the short and long fixed ears; The seed-scraping tooth-shaped plate and the seed-scraping rectangular plate are integrally formed from the tail end to the head end, and the inner side of the arc-shaped short plate is also arc-shaped, and the tail end is semicircular; the inner side of the seed-scraping tooth-shaped plate is 4 Triangular sawtooth; the inner side of the scraping rectangular plate is a plane, and the two right angle ends on the inner side are rounded;

The seed pushing plate is composed of a right-angled trapezoidal plate, a rectangular plate, an arc plate, a connecting plate and an inner connecting column, wherein the right-angled trapezoidal plate, the rectangular plate, the arc plate and the connecting plate are in sequence Fixed connection, the bottom of the inner connecting column is fixed to the upper surface of the connecting plate, and the seed pushing plate is bolted to the bottom surface of the circular plate in the upper shell of the seeding through the inner connecting column; the right-angled trapezoidal plate for pushing seeds is located above the rectangular seed scraping plate ;

Seed pushing side baffle is to have aperture straight plate, curved plate or folding plate, and it is vertically installed on the upper surface of pushing seed plate, and its lateral two ends all contact with the inwall of cylinder.

The root lengths of the 4 sawtooths in the inner side of the seed-scraping tooth-shaped plate increase one by one from the arc-shaped short plate of the seed-scraping plate to the head end of the seed-scraping plate.

The axis of the transmission shaft, the axis of the seed pipe, the axis of the nozzle, the center of the air hole of the exhaust hood, the center of the hole of the seed blowing pipe and the center of the hole of the seed pipe are located on the same plane; the ten The positions of the seed discharge port and the ten windshield disc holes correspond one by one in the vertical direction.

The beneficial effects of the utility model are:

1. Introduce the pneumatic structure into the seeding process to increase the seeding speed of the seed metering device;

2. When the seed metering device is not performing seeding, the air flow cannot enter the seed storage bin of the seed metering device, thus avoiding the disturbance of the air flow to the seeds in the seed metering device when the seeding device is not performing seeding, thereby improving the seeding accuracy and making the seeding Accurate and reliable operation;

3. At the same time, the seeds in the seed metering device are divided into two parts, which effectively reduces the interference of seeds on the airflow during seed metering.

Description of drawings

Fig. 1 is the sectional view of the vertical section of the embodiment of the utility model high-pressure pneumatic blowing non-ground-touching type seed meter;

Fig. 2 is the oblique view of the utility model embodiment;

Fig. 3 is the sectional oblique view of A-A section in Fig. 2 of the utility model;

Fig. 4 is the oblique view of the seed picking system of the present utility model;

Fig. 5 is the oblique view of the utility model scraper;

Fig. 6 is the sectional view of the B-B section in Fig. 1 of the utility model;

Fig. 7 is the oblique schematic diagram of the transmission system of the present utility model;

Fig. 8 is a top view of the transmission system of the present invention.

In the figure, 1-intake pipe, 2-elastic cylindrical pin, 3-wind shield, 5-exhaust cover, 7-blowing pipe, 8-seed upper shell, 9-nozzle, 10-seed lower shell Body, 12-seeding tube hole, 13-seeding tube, 14-seeding plate, 15-seeding plate, 16-seeding side baffle, 17-drive shaft, 18-seeding disc, 19-seeding Pipe, 33-inner connecting column, 101-upper straight tube, 102-bottom circular plate with holes, 301-stabilizing block, 302-wind shield plate hole, 501-vent hood vent hole, 502-vent hood shaft hole, 801 - Seed blowing pipe hole, 802-Circular plate, 803-Cylinder, 804-External connecting column, 805-Axial hole of the upper shell, 1001-Axial hole of the lower shell, 1401-Scraping arc short plate, 1402-Scraping Toothed plate, 1403-rectangular plate for scratching, 1404-short fixed ear, 1405-long fixed ear, 1501-right-angled trapezoidal plate for seeding, 1502-rectangular plate for seeding, 1503-curved plate for seeding, 1504-connection Plate, 1801 - Seed outlet.

Detailed ways

The specific structure and working process of the utility model embodiment are described below in conjunction with accompanying drawing: The embodiment of a kind of high-pressure pneumatic blowing non-touching type seed metering device of the utility model is composed of a blowing system, a storage system, a picking system and a transmission system composition;

The blowing system shown in Fig. 1 to Fig. 3 includes: an air intake pipe 1, an exhaust hood 5, a nozzle 9 and a seed blowing pipe 7, wherein the exhaust hood 5 is a thin-walled circular groove, which is installed in the seed picking system through an external connecting column 804 The upper casing 8 top of the seed row, the center of the exhaust hood 5 bottom has an exhaust hood shaft hole 502, and one side of the exhaust hood 5 bottom has an exhaust hood air hole 501; The lower circular plate with holes 102 is fixedly connected, wherein the lower circular plate with holes 102 is bolted to the top of the exhaust hood 5, and the upper straight tube 101 is connected to the external air pump; the seed blowing tube 7 is a bent tube with a bend in the middle , the nozzle 9 is installed in the vertical direction outside the bottom nozzle of the seed blowing pipe 7, and the top nozzle of the seed blowing pipe 7 is fixedly connected to the bottom of the exhaust hood 5 and is facing the exhaust hood air hole 501;

The seed storage system shown in Fig. 1～Fig. 3 and Fig. 6 comprises: the upper seeding housing 8, the lower seeding housing 10 and the seeding pipe 13; the upper seeding housing 8 includes the seeding pipe 19, the circular plate 802, the cylinder 803 and the outer connecting column 804, the bottom surface of the circular plate 802 is affixed to the top surface of the cylinder 803, the external diameter of the circular plate 802 and the cylinder 803 is the same, and the circular plate 802 has a hole that allows the blowing tube 7 to pass through. The seed blowing tube hole 801; the seeding tube 19 is installed on the upper surface of the circular plate 802, and is located on the other side of the seed blowing tube hole 801, and a hole matching the inner diameter of the bottom surface of the seeding tube 19 is punched on the circular plate 802 ; One end of the outer connecting column 804 is affixed to the upper surface of the circular plate 802, and the other end is bolted to the exhaust hood 5; the upper shell shaft hole 805 is opened in the center of the circular plate 802;

The lower housing 10 for seeding is a circular plate with a lower housing shaft hole 1001 in the middle, and a circular groove in the middle of the upper surface. The depth of the circular groove is equal to the depth of the seeding disc 18. The corresponding position at the bottom of the shaped groove has a seeding pipe hole 12, the axis of the seeding pipe hole 12 is collinear with the axis of the nozzle 9 in the vertical direction, and the position of the seeding pipe hole 12 is below the seeding lower housing 10. The seed pipe 13 is installed; the cylinder 803 is bolted to the lower seed housing 10 through the bolt 11, and the seed storage bin is surrounded by the upper seed housing 8 and the lower housing 10; the lower housing 10 is bolted Connected to the seeder frame.

Seed picking system as shown in Fig. 3 to Fig. 6 comprises: seed scraping plate 14, seed pushing plate 15 and seed pushing side baffle plate 16, and seed scraping plate 14 is made up of curved bar, short fixed ear 1404 and long fixed ear 1405 The outer side of the curved strip is arc-shaped, and the short fixing ears 1404 and the long fixing ears 1405 are fixedly connected to the outer side of the arc respectively, and the seed scraping plate 14 is connected to the lower housing of the seed row through the short fixing ears 1404 and the long fixing ears 1405 The upper surface of 10 is bolted; the curved strip is composed of a scraping arc short plate 1401, a scraping toothed plate 1402 and a scraping rectangular plate 1403 from the tail end to the head end, wherein the scraping arc short plate 1401 The inner side is also arc-shaped, and the tail end is semicircular; the inner side of the seed-scraping toothed plate 1402 is 4 triangular sawtooths, and the root length of the 4 sawtooths is from the arc-shaped short plate 1401 to the head end of the seed-scraping plate 14 Increase one by one; the inner side of the scraping rectangular plate 1403 is a plane, and the two right-angle ends on the inner side are rounded;

Seed pushing plate 15 is made of pushing kind of right-angled trapezoidal plate 1501, pushing kind of rectangular plate 1502, pushing kind of arc-shaped plate 1503, connecting plate 1504 and inner connection column 33, wherein pushing kind of right-angled trapezoidal plate 1501, pushing kind of rectangular plate 1502, pushing kind of The arc-shaped plate 1503 and the connecting plate 1504 are fixed in order, the bottom of the inner connecting column 33 is fixed on the upper surface of the connecting plate 1504, and the seed pushing plate 15 is connected to the bottom surface of the circular plate 802 of the upper housing 8 for seeding through the inner connecting column 33 Bolted connection: Seed pushing right-angled trapezoidal plate 1501 is located above seed scraping rectangular plate 1403, and the long side of pushing seeding right-angled trapezoidal plate 1501 cooperates with the outer end of seed scraping rectangular plate 1403 to ensure that there are only quantitative seeds when the seed metering device works Enter the side of the seed blowing pipe hole 801 in the seed storage bin;

Seed pushing side baffle plate 16 is straight plate, curved plate or folded plate that has aperture, and it is vertically installed on the upper surface of pushing seed plate 15, and its lateral two ends all contact with the inwall of cylinder 803, and pushing kind side The baffle plate 16 divides the storage bin surrounded by the upper seed housing 8 and the lower housing 10 into two, so as to ensure that the newly entered seeds from the seed feeding pipe 19 only stay in the seed feeding pipe of the seed storage bin. 19 one sides, the seed pipe 13 one sides that can not enter at will.

The transmission system shown in Fig. 1, Fig. 3, Fig. 6 to Fig. 8 includes: elastic cylindrical pin 2, windshield disk 3, transmission shaft 17 and seeding disk 18, windshield disk 3 connects with transmission shaft through elastic cylindrical pin 2 The upper half of 17 is pinned, the seed disc 18 is bolted to the lower half of the transmission shaft 17, and the transmission shaft 17 passes through the lower casing shaft hole 1001, the upper casing shaft hole 805 and the exhaust hood sequentially from bottom to top Axle hole 502, and constitutes a rotating pair with the seeding lower housing 10; the lower end of the drive shaft 17 is equipped with a sprocket, and the sprocket and the planter transmission system form a chain drive; Holes 302, ten stabilizing blocks 301 are evenly installed on the outside of the upper surface of the wind deflector 3, and are located outside the holes 302 of the wind deflecting disc, and the positions of the stabilizing blocks 301 correspond to the positions of the wind deflecting disc holes 302; The edge of 18 evenly has ten waist-shaped seeding openings 1801.

As shown in Fig. 1, Fig. 7 and Fig. 8, the positions of the ten seed outlets 1801 and the ten wind deflector holes 302 correspond to each other in the vertical direction during assembly, and the wind deflector 3 is located in the exhaust hood 5, and The windshield disk 3 can rotate freely in the exhaust hood 5; the seed disk 18 is located in the circular groove of the lower housing 10 for seed discharge, and the seed disk 18 can rotate freely in the circular groove; the transmission shaft 17 The axis of the axis, the axis of the seed pipe 13, the axis of the nozzle 9, the center of the hole of the exhaust hood air hole 501, the center of the hole of the seed blowing pipe hole 801 and the center of the hole of the seed pipe hole 12 are located on the same plane.

Before operation, the seeding pipe 19 is connected to the seeder box of the planter through a hose; the drive shaft 17 is connected to the drive system of the planter through the sprocket installed at the lower end, and the upper straight tube 101 on the intake pipe 1 is connected to the air pump through a connecting hose;

When working, first open the drive system of the planter, so that the drive shaft 17 is driven to rotate counterclockwise through the sprocket at the lower end of the drive shaft 17; then the air pump is turned on, and the air blowing system of the device is connected to the air intake pipe 1 through the connecting hose; finally, the sowing is turned on Machine seed box, the seed to be sown enters in the storage bin that is made up of the upper casing 8 of the seed and the lower casing 10 of the seed through the seed feeding pipe 19, and the side baffle plate 16 that pushes the seed in the seed box ensures that the newly entered Seed is only positioned at the feed pipe 19 side of seed storage bin, and replenishes seed to picking system in proportion. Through the counterclockwise rotation of the transmission shaft 17, under the orderly action of the seed scraping plate 14, the seed pushing plate 15, and the side baffle plate 16, the seeds are sequentially pushed into the seeding opening 1801 on the seeding disc 18, Under the action of the rotational torque of the transmission shaft 17, the seed disc 18 sends the seeds in the seed port 1801 into the seed tube 13 side through the gap between the seed pushing plate 15 and the lower seed housing 10, thereby Avoid the accumulation of too many seeds at the seed tube 13 and affect the sowing effect; then the redundant seeds will gradually bounce off along the zigzag curve inside the seed scraper 14 during the rotation of the seed disc 18 to ensure that when the seed is discharged When the seed port 1801 turned to the right below the nozzle 9, there was only one seed inside the seed port 1801; Mouth 1801 communicates with seeding pipe 13) air flows through the wind-shielding disk hole 302 on the wind-shielding disk 3, and the seed-blowing pipe 7 passes through the seeding mouth 1801 on the nozzle 9 and the seeding disk 18, and seeds are passed through the seeding pipe hole 12 and The seed pipe 13 is blown out, so as to achieve the purpose of timing and precise sowing.

Claims (4)

1. A high-pressure pneumatic blowing non-ground-touching seed metering device is characterized in that it includes: a blowing system, a seed storage system, a seed picking system and a transmission system; wherein the blowing system is installed on the top of the seed storage system, and the seed picking system is installed Inside the seed storage system, the transmission system passes through the seed storage system and the blowing system, and forms a rotating pair with the seed storage system; The blowing system includes: air intake pipe (1), exhaust hood (5), seed blowing pipe (7) and nozzle (9), wherein the exhaust hood (5) is a thin-walled circular groove, through which the outer connecting column (804) Installed on the top of the upper seeding housing (8) of the seed picking system, the exhaust hood shaft hole (502) is opened in the middle of the bottom of the exhaust hood (5), and the side of the bottom of the exhaust hood (5) is opened with an exhaust Cover air holes (501); the air intake pipe (1) is fixedly connected by the upper straight cylinder (101) and the lower circular plate with holes (102), wherein the lower circular plate with holes (102) is bolted to the exhaust hood (5) The top, the upper straight tube (101) is connected with the external air pump; the seed blowing pipe (7) is a bent pipe with a bend in the middle, and a nozzle (9) is arranged on the vertical direction outside the nozzle of the bottom of the seed blowing pipe (7), The top nozzle of the seed blowing pipe (7) is affixed to the bottom of the exhaust hood (5) and is facing the exhaust hood air hole (501); The seed storage system includes: an upper seed discharge casing (8), a lower seed discharge casing (10) and a seed discharge pipe (13); the upper seed discharge casing (8) includes a seed inlet pipe (19), a circular plate (802), the cylinder (803) and the outer connecting column (804), the bottom surface of the disc (802) and the top surface of the cylinder (803) are affixed, and the outer diameter of the disc (802) and the cylinder (803) are the same , the circular plate (802) is provided with a blowing pipe hole (801) allowing the passage of the seed blowing pipe (7); 801) on the other side of the circular plate (802), and punch a hole matching the inner diameter of the bottom surface of the seed tube (19); one end of the outer connecting column (804) is affixed to the upper surface of the circular plate (802) , the other end is bolted to the exhaust hood (5); the upper shell shaft hole (805) is opened in the middle of the circular plate (802); the lower shell (10) for seeding is a circular plate, and the lower shell is opened in the middle Body shaft hole (1001), and a circular groove is opened in the middle of the upper surface, the depth of the circular groove is equal to the depth of the seeding disc (18), and a seeding pipe hole ( 12), the axis of the seeding pipe hole (12) and the axis of the nozzle (9) are collinear in the vertical direction, and a seeding device is installed below the seeding lower casing (10) at the position of the seeding pipe hole (12). The tube (13); the cylinder (803) is bolted to the lower seed-discharging housing (10) through bolts (11), and the seed-discharging upper housing (8) and the lower seed-discharging housing (10) form a storage bin ;The lower casing (10) for seeding is bolted to the frame of the planter; The transmission system includes: elastic cylindrical pins (2), windshield disks (3), transmission shafts (17) and seeding disks (18), wherein ten windshield disk holes are evenly opened in the windshield disk (3) (302), ten stabilizing blocks (301) are evenly installed on the outside of the upper surface of the windshield disk (3), and are positioned at the outside of the windshield disk hole (302); The position of a windshield disk hole (302) is corresponding; the windshield disk (3) is located in the exhaust hood (5); the edge of the seed disk (18) is evenly opened with ten waist-shaped seed outlets (1801) ; The windshield disc (3) is pinned to the upper half of the drive shaft (17) by elastic cylindrical pins (2), the seed disc (18) is bolted to the lower half of the drive shaft (17), and the drive shaft (17) ) through the lower housing shaft hole (1001), the upper housing shaft hole (805) and the exhaust cover shaft hole (502) in sequence from bottom to top, and form a rotating pair with the seeding lower housing (10); Seed disc (18) is positioned at the circular groove of lower casing (10) of seeding; The lower end of drive shaft (17) is equipped with sprocket wheel, and the transmission system of sprocket wheel and sower constitutes chain drive. 2. A high-pressure pneumatic blowing non-ground-touching seed metering device according to claim 1, characterized in that, the seed picking system comprises: a seed scraping plate (14), a seed pushing plate (15) and a seed pushing side Baffle plate (16), seed scraping plate (14) is made of curved strip, short fixed ear (1404) and long fixed ear (1405), and wherein the outside of curved strip is arc, and short fixed ear (1404) and long fixed ears (1405) are affixed to the arc outer side respectively, and the seed scraping plate (14) is bolted to the upper surface of the seed-discharging lower casing (10) through the short fixed ears (1404) and the long fixed ears (1405); The arc-shaped strip is composed of a scraping arc-shaped short plate (1401), a scraping tooth-shaped plate (1402) and a scraping rectangular plate (1403) integrally formed from the tail end to the head end, wherein the scraping arc-shaped short plate (1401) The inner side of the scraper is also arc-shaped, and the tail end is a semicircle; the inner side of the scraping tooth-shaped plate (1402) is 4 triangular sawtooths; have rounded corners; Seed pushing plate (15) is made of pushing kind of right-angled trapezoidal plate (1501), pushing kind of rectangular plate (1502), pushing kind of arc-shaped plate (1503), connecting plate (1504) and internal connecting column (33), wherein pushing kind of The right-angled trapezoidal plate (1501), the pushing rectangular plate (1502), the pushing arc plate (1503) and the connecting plate (1504) are sequentially fixed, and the bottom of the inner connecting column (33) is connected to the upper surface of the connecting plate (1504) Fixedly connected, the seed pushing plate (15) is bolted to the bottom surface of the circular plate (802) in the upper housing (8) for seeding by the inner connecting column (33); 1403); Seed side baffle plate (16) is to have the straight plate of aperture, curved plate or folding plate, and it is vertically installed on the upper surface of seed board (15), and its lateral two ends are all connected with the cylinder (803). Inner wall contact. 3. A kind of high-pressure pneumatic blowing non-ground-touching seed metering device according to claim 2, characterized in that, the root length of the four sawtooths on the inner side of the seed scraping tooth-shaped plate (1402) is determined by the scraping arc The short plate (1401) increases one by one towards the head end of the seed scraping plate (14). 4. A high-pressure pneumatic blowing non-ground-touching seed metering device according to claim 1, characterized in that, the axis of the drive shaft (17), the axis of the seed pipe (13), the axis of the nozzle (9) The axis, the hole center of the exhaust hood air hole (501), the hole center of the seed blowing pipe hole (801) and the hole center of the seed pipe hole (12) are located on the same plane; the ten seed discharge ports (1801) The positions of the ten windshield disc holes (302) correspond one by one in the vertical direction.