Air-suction double-row seeder for vegetable sowing

Abstract

The present invention discloses an air-suction double-row seeder for vegetable sowing, comprising a seeding device and a furrow opener; the seeding device comprises a base body with a cavity; seeding disks with seed suction holes are respectively installed on both sides of the cavity; the seeding device further comprises a seed box and a seed guide tube, wherein the seed guide tube has a seed guide channel; the cavity is provided with two radially extending dividing ribs; the two dividing ribs divide the cavity into a first fan-shaped cavity and a second fan-shaped cavity; an air extraction pipe is connected to the first fan-shaped cavity, and an air inlet pipe connected to the second fan-shaped cavity is also installed on the base body; the air extraction pipe and the air inlet pipe are connected by an air pump; the second fan-shaped cavity is also connected to a first overflow channel and a second overflow channel, wherein the first overflow channel is connected to the bottom of the seed box; and the second overflow channel leads to the seed guide channel. The present invention adopts a reasonable cavity layout and air path layout, fully utilizing the internal space of the base body and the air inlet and outlet requirements of each component, and can effectively shorten the air path and reduce the required air pipe length.

Description

Technical Field

[0001] The present invention relates to the technical field of seed drills, in particular to an air-suction double-row seed drill for vegetable seeding. Background Art

[0002] In modern agriculture, vegetable seeding requires a seeder, a crucial component of agricultural machinery that significantly improves seeding efficiency. Prior application CN212650072U discloses a disc-type, single-channel seeding device. This device generates air pressure on both sides of a seeding disc, creating suction through the seeding holes on the disc, enabling precise seeding. Furthermore, the device introduces airflow into the seed bin, disturbing the seeds within, increasing the probability that the seeding holes will attract the seeds. The above scheme can only carry out single-path sowing. In some sowing occasions, close-range double-row sowing is required. If the schemes of the above-mentioned patents are simply superimposed, the structure of the seed meter will be relatively bloated. Therefore, patents CN109496504A, CN214507917U and other schemes provide methods for simultaneously carrying out double-row sowing and improving the compactness of the mechanism. The main idea is to place two seed discs on both sides of the same air cavity and evacuate the air cavity so that the holes on the two seed discs on both sides generate negative pressure to absorb seeds. The above structure can improve the compactness of the structure, but the functions realized by the above-mentioned seed meter are relatively simple. It is necessary to realize the disturbance of seeds in the seed bin and the auxiliary seed discharge in patent CN212650072U, which require separate air paths, which will make the air path of the system too complicated and affect the structural compactness and stability of the seed meter. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides an air-suction double-row seeder for vegetable sowing that can simultaneously realize the functions of seed suction, seed suction hole cleaning, air flow disturbance of seeds, and air flow assisted seeding, and has a simple and reasonable air path layout.

[0004] Technical solution: To achieve the above-mentioned purpose, the present invention provides an air-suction double-row seeder for vegetable sowing, which includes a seeding device and a furrow opener; the seeding device has a centrally placed seat, and the seat has cavities extending through it on both sides;

[0005] Seed discs are installed on both sides of the cavity, and the seed discs are rotatably installed relative to the base body; the seed discs have seed suction holes arranged in a circumferential array; the base body is connected to an air extraction pipe;

[0006] The seed metering device further includes a seed box; the seed suction hole can absorb seeds from the seed box, take the absorbed seeds away from the seed box, and release the seeds at the seed discharge position;

[0007] It also includes a seed guide tube, wherein the seed guide tube has two seed guide channels arranged in a one-to-one correspondence with the two seed discs;

[0008] The cavity is provided with two radially extending separation ribs;

[0009] The two dividing ribs divide the cavity into a first fan-shaped cavity and a second fan-shaped cavity; the air extraction pipe is connected to the first fan-shaped cavity, and an air inlet pipe connected to the second fan-shaped cavity is also installed on the base; the air extraction pipe and the air inlet pipe are connected via an air pump;

[0010] The second fan-shaped cavity is also connected to a first overflow channel and a second overflow channel. The first overflow channel is connected to the bottom of the seed box; the second overflow channel leads to the seed guide channel.

[0011] Furthermore, the furrow opener is installed under the seat body; the furrow opener has a main body with a pointed front and a wide rear, and the bottom of the main body has two strip-shaped protrusions protruding downward; the seed guide tube is fixed to the rear end of the furrow opener, and the seed guide tube is Y-shaped and has two seed guide channels therein, and the two seed guide channels can respectively guide the seeds discharged from the two seed discs into the seed grooves opened by the two protrusions.

[0012] Furthermore, the furrow opener is connected to the seat body through an elastic mechanism.

[0013] Furthermore, a telescopic bracket is installed on the furrow opener, a guide sleeve is installed on the lower side of the seat body, the telescopic bracket is slidably connected to the guide sleeve, and a first spring is installed between the furrow opener and the guide sleeve.

[0014] Furthermore, the two seed discs are driven to rotate by the same drive shaft.

[0015] Furthermore, the base body is provided with two seed boxes corresponding to the two seed discs, each of the seed boxes having an independent seed inlet; the seed box has a seed cavity with an inner open side, and the open side of the seed cavity is blocked by the seed disc.

[0016] Furthermore, the bottom of the seed box has an inclined side wall on one side away from the center of the seed disc, and a fixing block for fixing the air inlet pipe is fixed on the inclined side wall, and the first overflow channel is connected to the air inlet pipe; a ventilation cavity is provided in the fixing block, and a ventilation hole is provided on the inclined side wall.

[0017] Furthermore, the seed box has a seed outlet, a seed cleaning mechanism is installed at the seed outlet, and the seed box has an arcuate surface located below the seed cleaning mechanism, and the arcuate surface leads to the bottom of the seed box.

[0018] Furthermore, the seed cleaning mechanism includes a seed cleaning piece, one end of which establishes a rotational connection with the seed box through a rotating shaft, and the other end of the seed cleaning piece is connected to an adjusting rod, through which the angle of the seed cleaning piece can be adjusted.

[0019] Furthermore, a shift rod is connected to the seat body, and a blocking piece is provided at the end of the shift rod. The blocking piece is located at the seed discharge position to push the seeds adsorbed by the seed suction hole into the seed guide channel.

[0020] Beneficial effects: The air-suction double-row seeder for vegetable sowing of the present invention has the following beneficial effects:

[0021] (1) The cavity layout and air path layout described above fully utilize the internal space of the seat body and the air inlet and outlet requirements of each component, which can effectively shorten the air path and reduce the required air pipe length, making the planter simple and compact as a whole;

[0022] (2) A modular design is used, with the furrow opener installed under the base and the seed guide tube installed on the rear side of the furrow opener. This can make the structure of the entire seeder compact, and the entire seeder forms a module that can be easily installed, making it easy to integrate into agricultural machinery. The seeder requires a small installation space, which can improve its versatility and is conducive to the miniaturization of agricultural machinery integrated with the seeder. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of an air-suction double-row seeder for vegetable sowing;

[0024] Figure 2 A cross-sectional view of an air-suction double-row seeder for vegetable sowing;

[0025] Figure 3 A perspective view of an air-suction double-row seeder for vegetable seeding;

[0026] Figure 4 A perspective view of an air-suction double-row seeder for vegetable sowing;

[0027] Figure 5 This is a structural diagram of the structure inside the seed box;

[0028] Figure 6 It is a cross-sectional structural diagram of the drive shaft;

[0029] Figure 7 It is the installation structure diagram of the furrow opener in the preferred embodiment.

[0030] In the figure: 1- furrow opener; 11- main body; 12- strip-shaped protrusion; 2- base; 21- first dividing rib; 22- second dividing rib; 2a- first fan-shaped cavity; 2b- second fan-shaped cavity; 3- seeding plate; 31- seed suction hole; 4- seed box; 41- seed outlet; 42- inclined side wall; 51- air extraction pipe; 52- air inlet pipe; 53- air pump; 54- first overflow channel; 55- second overflow channel; 6- seed guide pipe; 61 -seed guide channel; 7-seed cleaning mechanism; 71-seed cleaning plate; 72-adjusting rod; 73-rotating shaft; 8-inlet pipe; 81-fixed block; 9-drive shaft; 91-inlet hole; 92-outlet hole; 93-outlet connector; 94-first exhaust pipe; 10a-telescopic bracket; 10b-guide sleeve; 10c-first spring; 10d-cross bar; 10e-second spring; 11a-gear lever; 11b-blocking plate; 12-cleaning brush. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] like Figure 1-4 The air-suction double-row seeder for vegetable sowing shown includes a seeding device and a furrow opener 1; the seeding device has a centrally placed base 2, and the base 2 has a cavity passing through on both sides; seeding discs 3 are respectively installed on both sides of the cavity, and the seeding discs 3 are rotatably installed relative to the base 2; the seeding discs 3 have seed suction holes 31 arranged in a circumferential array; the base 2 is connected to an air suction pipe 51; the seeding device also includes a seed box 4; the seed suction holes 31 can absorb seeds from the seed box 4, take the absorbed seeds away from the seed box 4, and release the seeds at the seeding position; it also includes a seed guide tube 6, and the seed guide tube 6 has two seed guide channels 61 arranged in a one-to-one correspondence with the two seed discs 3.

[0033] like Figure 2-3 As shown, there are two radially extending dividing ribs in the cavity, which are a first dividing rib 21 located at the seed row position and a second dividing rib 22 located at the bottom position of the seed box 4; the two dividing ribs divide the cavity into a first fan-shaped cavity 2a and a second fan-shaped cavity 2b; the exhaust pipe 51 is connected to the first fan-shaped cavity 2a, and an air inlet pipe 52 connected to the second fan-shaped cavity 2b is also installed on the base body 2; the exhaust pipe 51 and the air inlet pipe 52 are connected by an air pump 53; the second fan-shaped cavity 2b is also connected to a first overflow channel 54 and a second overflow channel 55, and the first overflow channel 54 is connected to the bottom of the seed box 4; the second overflow channel 55 leads to the seed guide channel 61.

[0034] The above-mentioned cavity layout and air path layout fully utilize the internal space of the base body 2 and the air intake and exhaust requirements of each component, effectively shortening the air path and reducing the required air pipe length, making the seeder simple and compact. Specifically, only one air pump 53 is required in the above-mentioned air path. The air pump 53 extracts gas from the first fan-shaped cavity 2a, causing the first fan-shaped cavity 2a to generate a negative pressure. The seed suction holes 31 on the seeding disc 3 that are connected to the first fan-shaped cavity 2a generate an adsorption force and adsorb the seeds in the seed box 4. The rotation of the seeding disc 3 can remove the seeds from the seed box 4 through the seed suction holes 31. The seeds removed from the seed box 4 move to the seeding position and fall into the corresponding seed guide channel 61.

[0035] The air pump 53 draws out gas from the first fan-shaped cavity 2a and discharges it to the second fan-shaped cavity 2b through the air inlet pipe 52, so that positive pressure is generated in the second fan-shaped cavity 2b. On the one hand, the gas in the second fan-shaped cavity 2b overflows from the seed suction hole 31 on the seed plate 3 that is connected to the second fan-shaped cavity 2b, and the seed suction hole 31 can be reversely ventilated and cleaned to prevent debris or seeds from blocking the seed suction hole 31; on the other hand, the gas in the second fan-shaped cavity 2b overflows from the first overflow channel 54 to the bottom of the seed box 4, and the airflow entering the seed box 4 can make the seeds in the seed box 4 jump, so as to increase the probability of the seed suction hole 31 sucking in the seeds, and ultimately improve the sowing accuracy; on the third hand, the gas in the second fan-shaped cavity 2b overflows from the second overflow channel 55 to the seed guide channel 61, and the auxiliary seeds are discharged from the seed guide channel 61. Since the first dividing rib 21 is located at the seed rowing position and the second dividing rib 22 is located at the bottom position of the seed box 4, the seed inlet of the seed guide tube 6 and the seed box 4 are actually located at the two edge positions of the second fan-shaped cavity 2b, and the air flow overflowing from the second fan-shaped cavity 2b is respectively guided to the bottom of the seed box 4 and the seed guide channel 61. The air paths are very short and the design is very reasonable and compact.

[0036] Preferably, the furrow opener 1 is installed under the seat 2; the furrow opener 1 has a main body 11 with a pointed front and a wide rear, and the bottom of the main body 11 has two strip-shaped protrusions 12 protruding downward and extending front and back; the seed guide tube 6 is fixed at the rear end of the furrow opener 1, and the seed guide tube 6 is Y-shaped and has two seed guide channels 61 therein, and the two seed guide channels 61 can respectively guide the seeds discharged from the two seed discs 3 to the seed grooves opened by the two protrusions 12.

[0037] In the above structure, a modular design is used, the furrow opener 1 is installed under the base 2, and the seed guide tube 6 is installed on the rear side of the furrow opener 1, so that the structure of the entire seeder can be compact. The entire seeder forms a module that can be easily installed, which is convenient for integrating it into agricultural machinery. The seeder requires a small installation space, which can improve its versatility and is conducive to the miniaturization of agricultural machinery integrated with the seeder.

[0038] In the structure of the above-mentioned furrow opener 1, the main body 11 opens a wide and deep groove in the ground, and the strip-shaped protrusion 12 continues to open two small seed grooves at the bottom of the large groove opened by the main body 11 to receive the seeds discharged by the two seed trays 3. In this structure, the sowing depth of vegetable seeds can be guaranteed, and the subsequent germination rate can be guaranteed.

[0039] Preferably, the furrow opener 1 is connected to the base 2 via an elastic mechanism. When in use, the base 2 of the seed meter is fixed relative to the frame of the agricultural machine on which it is located. The fluctuations of the agricultural machine as a whole caused by the influence of the ground are usually inconsistent with the undulations of the ground where the furrow opener 1 is located. Therefore, the provision of the elastic mechanism can ensure a high consistency in the furrowing depth.

[0040] Specifically, if Figure 1 As shown, the trench opener 1 is equipped with a telescopic bracket 10a, and the lower side of the base 2 is equipped with a guide sleeve 10b. The telescopic bracket 10a is slidably connected to the guide sleeve 10b, and a first spring 10c is installed between the trench opener 1 and the guide sleeve 10b. In addition, preferably, as Figure 7 As shown, the top of the telescopic bracket 10a has a crossbar 10d, and a second spring 10e is installed between the ends of the telescopic bracket 10a and the trench opener 1. The rigidity of the second spring 10e is greater than that of the first spring 10c, and the former is at least three times that of the latter. In this way, during normal trenching, it is mainly the first spring 10c that causes the trench opener 1 to elastically expand and contract. When the trench opener 1 encounters a hard object, the second spring 10e can deform and change the posture of the trench opener 1, preventing damage to the base 2 when the trench opener 1 collides with the hard object.

[0041] The two seed discs 3 are driven to rotate by the same drive shaft 9. Preferably, the drive shaft 9 is a hollow shaft with a plurality of air inlet holes 91 arranged in a circumferential array in the middle, and air outlet holes 92 are provided on the parts extending outside the seed disc 3 at both ends; the base body 2 has a central cavity connected to the second fan-shaped cavity 2b, and when the drive shaft 9 rotates, the air inlet hole 91 is always connected to the second fan-shaped cavity 2b. An air outlet connector 93 arranged around the air outlet hole 92 is provided on both sides of the drive shaft 9, and the air outlet connectors 93 on both sides are respectively connected to the two seed guide channels 61 through the first exhaust pipe 94. In this way, the air flow of the second fan-shaped cavity 2b can be guided out by the drive shaft 9, and the air pipe from the drive shaft 9 to the seed guide channel 61 is consistent with the target direction of the air flow, which can reduce the length of the air pipe and avoid the air pipe twisting and taking up more space.

[0042] Preferably, the base 2 is mounted with two seed boxes 4 corresponding to the two seed trays 3, each having an independent seed inlet 41. The seed boxes 4 have an open seed cavity, the open side of which is blocked by the seed tray 3, so that the seeds in the seed boxes 4 can contact the seed tray 3, thereby increasing the probability that the seeds can be absorbed by the seed suction holes 31 of the seed boxes 4. The two seed boxes 4 can contain the same seed to achieve simultaneous double-row sowing of the same seed. The two seed boxes 4 can also contain two types of seeds to achieve interspersed sowing of the two seeds.

[0043] The bottom of the seed box 4 has an inclined side wall 42 on one side away from the center of the seed disc 3, and a fixing block 81 for fixing the air inlet pipe 8 is fixed on the inclined side wall 42. The first overflow channel 54 is connected to the air inlet pipe 8; the fixing block 81 has a ventilation cavity, and the inclined side wall 42 has a ventilation hole.

[0044] The seed box 4 has a seed outlet 41 , a seed clearing mechanism 7 is installed at the seed outlet 41 , and the seed box 4 has an arcuate surface located below the seed clearing mechanism 7 , which leads to the bottom of the seed box 4 .

[0045] like Figure 6 As shown, the seed clearing mechanism 7 includes a seed clearing blade 71, one end of which is rotatably connected to the seed box 4 via a rotating shaft 73. The other end of the seed clearing blade 71 is connected to an adjustment rod 72, which can be used to adjust the angle of the seed clearing blade 71. With this arrangement, the seed clearing mechanism 7 can clear the seed suction holes 31, removing any excess seeds sucked in by the suction holes 31. This ensures that the number of seeds sucked in by each suction hole 31 is relatively certain, thus achieving precision sowing. Seeds that fall due to the seed clearing mechanism 7 slide back along the curved surface to the bottom of the seed box 4.

[0046] Preferably, a shift lever 11a is connected to the base 2, and a baffle 11b is provided at the end of the shift lever 11a. The baffle 11b is located at the seed discharge position to push the seeds adsorbed by the seed suction hole 31 into the seed guide channel 61. In addition, a cleaning brush 12 is provided on the rear side of the baffle 11b to clean the inner side of the seed suction hole 31 passing through.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An air-suction double-row seeder for vegetable sowing, comprising a seeding device and a furrow opener (1); the seeding device has a centrally located base (2), and the base (2) has a cavity extending through it on both sides; Seed discs (3) are respectively installed on both sides of the cavity, and the seed discs (3) are rotatably installed relative to the base (2); the seed discs (3) have seed suction holes (31) arranged in a circumferential array; the base (2) is connected to an air extraction pipe (51); The seed metering device further comprises a seed box (4); the seed suction hole (31) is capable of absorbing seeds from the seed box (4), taking the absorbed seeds away from the seed box (4), and releasing the seeds at the seed metering position; It also includes a seed guide tube (6), wherein the seed guide tube (6) has two seed guide channels (61) arranged in a one-to-one correspondence with the two seed discs (3); Its characteristics are: The cavity is provided with two radially extending separation ribs; The two dividing ribs divide the cavity into a first fan-shaped cavity (2a) and a second fan-shaped cavity (2b); the air extraction pipe (51) is connected to the first fan-shaped cavity (2a), and an air inlet pipe (52) connected to the second fan-shaped cavity (2b) is also installed on the base (2); the air extraction pipe (51) and the air inlet pipe (52) are connected via an air pump (53); The second fan-shaped cavity (2b) is also connected to a first overflow channel (54), and the first overflow channel (54) is connected to the bottom of the seed box (4); The two seeding discs (3) are driven to rotate by the same driving shaft (9); the driving shaft (9) is a hollow shaft, and has a plurality of air inlet holes (91) arranged in a circumferential array in the middle thereof, and the parts of the two ends thereof extending outside the seeding disc (3) are provided with air outlet holes (92), and the base body (2) has a central cavity connected to the second fan-shaped cavity (2b), and when the driving shaft (9) rotates, the air inlet hole (91) is always connected to the second fan-shaped cavity (2b), and air outlet joints (93) arranged around the air outlet hole (92) are respectively provided on both sides of the driving shaft (9), and the air outlet joints (93) on both sides are respectively connected to the two seed guide channels (61) through the first exhaust pipe (94).

2. The air-suction double-row seeder for vegetable sowing according to claim 1, characterized in that: The furrow opener (1) is installed below the base (2); the furrow opener (1) has a main body (11) that is pointed at the front and wide at the rear, and the bottom of the main body (11) has two strip-shaped protrusions (12) protruding downward; the seed guide tube (6) is fixed to the rear end of the furrow opener (1), and the seed guide tube (6) is Y-shaped and has two seed guide channels (61) therein, and the two seed guide channels (61) can respectively guide the seeds discharged from the two seed discs (3) into the seed grooves opened by the two protrusions (12).

3. The air-suction double-row seeder for vegetable sowing according to claim 1, characterized in that: The furrow opener (1) is connected to the seat (2) via an elastic mechanism.

4. The air-suction double-row seeder for vegetable sowing according to claim 1, characterized in that: A telescopic bracket (10a) is installed on the furrow opener (1), a guide sleeve (10b) is installed on the lower side of the base body (2), the telescopic bracket (10a) is slidably connected to the guide sleeve (10b), and a first spring (10c) is installed between the furrow opener (1) and the guide sleeve (10b).

5. The air-suction double-row seeder for vegetable sowing according to claim 1, characterized in that: The base (2) is provided with two seed boxes (4) arranged in a one-to-one correspondence with the two seed discs (3), and each seed box (4) has an independent seed inlet; the seed box (4) has a seed cavity with an inner side open, and the open side of the seed cavity is blocked by the seed disc (3).

6. The air-suction double-row seeder for vegetable sowing according to claim 1, characterized in that: The bottom of the seed box (4) has an inclined side wall (42) on the side away from the center of the seed plate (3), and a fixing block (81) for fixing the air inlet pipe (8) is fixed on the inclined side wall (42), and the first overflow channel (54) is connected to the air inlet pipe (8); a ventilation cavity is provided in the fixing block (81), and a ventilation hole is provided on the inclined side wall (42).

7. The air-suction double-row seeder for vegetable sowing according to claim 1, characterized in that: The seed box (4) has a seed outlet (41), a seed clearing mechanism (7) is installed at the seed outlet (41), and the seed box (4) has an arcuate surface located on the lower side of the seed clearing mechanism (7), and the arcuate surface leads to the bottom of the seed box (4).

8. The air-suction double-row seeder for vegetable sowing according to claim 7, characterized in that: The seed cleaning mechanism (7) comprises a seed cleaning piece (71), one end of which is connected to the seed box (4) via a rotating shaft (73), and the other end of which is connected to an adjusting rod (72), through which the angle of the seed cleaning piece (71) can be adjusted.

9. The air-suction double-row seeder for vegetable sowing according to claim 1, characterized in that: The seat body (2) is connected to a shift rod (11a), and the end of the shift rod (11a) is provided with a blocking piece (11b). The blocking piece (11b) is located at the seed discharge position to push the seeds adsorbed by the seed suction hole (31) into the seed guide channel (61).

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