A sowing device and its positive pressure airflow assisted sowing mechanism and positive pressure sowing component

Abstract

A sowing device and its positive-pressure airflow-assisted seeding mechanism and positive-pressure seeding component, the sowing device includes a positive-pressure airflow-assisted seeding mechanism, the mechanism includes a positive-pressure seeding component, the component includes: a shell, on which an airflow channel, a seed inlet and a mixing port are arranged, a connected cavity is between the seed inlet and the mixing port, and the airflow channel is connected to the cavity; a seed inlet component, including a seed inlet body, on which a seed inlet channel is coaxially arranged, installed in the cavity through the seed inlet, and its lower part is an outer cone; and a mixing component, including a mixing body, installed in the cavity through the mixing port, wherein a gas-solid mixing chamber and a seeding chamber that are connected to each other are arranged, a semi-cylindrical port is arranged at the upper end, and the lower part of the seed inlet body passes through the semi-cylindrical port to the gas-solid mixing chamber; a gas circulation groove is formed between the outer cone and the inner wall of the semi-cylindrical port and part of the gas-solid mixing chamber, and is connected to the airflow channel through the semi-cylindrical port; the gas-solid mixing chamber is respectively connected to the gas circulation groove and the seed inlet channel.

Description

Technical Field

[0001] The invention relates to an agricultural sowing device, in particular to a sowing device and a positive pressure airflow auxiliary sowing mechanism and a positive pressure sowing component thereof. Background Art

[0002] With the development of agricultural mechanization, efficient and precise seeding technology has become an important part of modern agricultural production. As the main food crops, the uniformity of seeding of corn and soybeans directly affects the growth, yield and ultimate economic benefits of crops. However, under high-speed seeding, traditional seeding equipment often faces problems such as uneven seed distribution and unstable density, which not only affects the growth of crops, but also may lead to waste of farmland resources. At present, traditional seeders mainly rely on gravity to plant seeds. However, this method is easily affected by factors such as vibration under high-speed operation conditions, which increases the randomness of seed movement in the seed guide tube, thereby affecting the accuracy and uniformity of seed placement. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a sowing device and a positive pressure airflow assisted sowing mechanism and a positive pressure sowing component thereof in view of the above-mentioned defects of the prior art.

[0004] In order to achieve the above object, the present invention provides a positive pressure seeding component, which includes:

[0005] A shell, wherein an airflow channel, a seed inlet and a mixing port are provided on the shell, a cavity is connected between the seed inlet and the mixing port, and the airflow channel is connected with the cavity;

[0006] A seed feeding member, comprising a seed feeding body, a seed feeding channel is coaxially arranged on the seed feeding body, the seed feeding body is installed in the cavity through the seed feeding port, and the lower part of the seed feeding body is an outer cone surface; and

[0007] The mixing element comprises a mixing body, wherein the mixing body is installed in the cavity through the mixing port, and a gas-solid mixing chamber and a seeding chamber which are interconnected are arranged in the mixing body, a semi-cylindrical port is arranged at the upper end of the mixing body, and the lower part of the seeding body passes through the semi-cylindrical port to the gas-solid mixing chamber; a gas circulation groove is formed between the outer conical surface, the semi-cylindrical port and a part of the inner wall of the gas-solid mixing chamber, and the gas circulation groove is connected with the gas flow channel through the semi-cylindrical port; the gas-solid mixing chamber is respectively connected with the gas circulation groove and the seeding channel.

[0008] The above-mentioned positive pressure seeding component, wherein the seed inlet and the mixing port are respectively arranged at the two ends of the shell, the air inlet of the air flow channel and the seed inlet are arranged at the same end of the shell, and the center line of the air inlet has an eccentric distance relative to the center line of the seed inlet.

[0009] In the above-mentioned positive pressure seeding component, the inner wall of the semi-cylindrical opening and the gas-solid mixing chamber is an inner conical surface adapted to the outer conical surface.

[0010] The above-mentioned positive pressure seeding component, wherein the airflow channel includes a first flow channel, a second flow channel and a transition flow channel, the two ends of the first flow channel are respectively connected to the air inlet of the airflow channel and one end of the transition flow channel, the other end of the transition flow channel is connected to one end of the second flow channel, and the other end of the second flow channel is connected to the semi-annular cylindrical opening.

[0011] The above-mentioned positive pressure seeding component, wherein the axis of the first flow channel is parallel to the cavity, the axis of the second flow channel is perpendicular to the cavity, and the diameter of the transition flow channel is smaller than the diameters of the first flow channel and the second flow channel.

[0012] The above-mentioned positive pressure seeding component, wherein the outer wall of the seeding body is provided with a seeding fastening groove, the outer wall of the mixing body is provided with a mixing fastening groove, and the shell is provided with bolt holes corresponding to the seeding fastening groove and the mixing fastening groove respectively.

[0013] In order to better achieve the above-mentioned purpose, the present invention also provides a positive pressure airflow assisted seeding mechanism, which includes:

[0014] The above-mentioned positive pressure seeding component;

[0015] A fan connected to the air flow channel of the positive pressure seeding component through an air flow duct;

[0016] A seed metering device connected to the seed feeding member of the positive pressure seeding component through a connecting component; and

[0017] The seed guide tube is connected to the lower end of the mixing element of the positive pressure seeding component and is communicated with the seeding cavity of the mixing element.

[0018] The above-mentioned positive pressure airflow assisted seeding mechanism, wherein the connecting component includes a connecting body, and the connecting body is provided with a seeding channel and a sensor port, the seeding channel runs through the connecting body, the upper connecting port of the seeding channel is connected to the seed metering device, and the lower connecting port of the seeding channel is connected to the seed feeder; the sensor port is arranged on both sides of the connecting body, and a photoelectric sensor is installed in the sensor port.

[0019] The above-mentioned positive pressure airflow assisted seeding mechanism, wherein the seed meter is provided with a driving rotating handle, the driving rotating handle is connected to the transmission mechanism of the seeding device, and is driven by the ground wheel or motor of the seeding device.

[0020] In order to better achieve the above-mentioned purpose, the present invention also provides a seeding device, which includes the above-mentioned positive pressure airflow assisted seeding mechanism.

[0021] The technical effects of the present invention are:

[0022] The present invention is suitable for guiding seeds in high-speed sowing. Under high-speed operation conditions, the collision between seeds and tube walls can be reduced, and good sowing uniformity can be ensured. The present invention can be adapted to various types and models of precision seeding devices, and can be matched with precision seeding technology to comprehensively improve the sowing quality. The positive-pressure airflow-assisted seeding mechanism utilizes the thrust of the airflow to better control the flow path and speed of the seeds, and ensure that the seeds can fall to the predetermined position evenly and stably during the sowing process. The present invention can not only significantly improve the uniformity of sowing, but also adapt to the characteristics of different types of seeds, and reduce the damage and waste of seeds during the sowing process. At the same time, the positive-pressure airflow-assisted seeding mechanism can also be combined with a modern intelligent control system to realize real-time monitoring and adjustment of the sowing process, and further improve the sowing efficiency and accuracy.

[0023] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural schematic diagram of a seeding device according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a positive pressure airflow assisted seeding mechanism according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of a seed meter according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of a connecting component according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of a seed feeding member according to an embodiment of the present invention;

[0029] Figure 6 A schematic diagram of the structure of a mixing element according to an embodiment of the present invention;

[0030] Figure 7 A schematic diagram of a housing structure according to an embodiment of the present invention;

[0031] Figure 8 A schematic diagram of the structure of a housing in another direction according to an embodiment of the present invention;

[0032] Fig. 9 A top view of a housing according to an embodiment of the present invention;

[0033] Fig.10 It is a cross-sectional view of a positive pressure seeding component according to an embodiment of the present invention.

[0034] Among them, the reference numerals

[0035] 1 Straw clearing and anti-blocking mechanism

[0036] 2 Suspension mechanism

[0037] 3. Profiling mechanism

[0038] 4 Transmission mechanism

[0039] 5 types of boxes

[0040] 6. Positive pressure airflow assisted seeding mechanism

[0041] 61 Fan

[0042] 62 Seeder

[0043] 621 Drive Rotary Handle

[0044] 622 seeding port

[0045] 63 Airflow duct

[0046] 64 Connecting parts

[0047] 641 Connect to the main unit

[0048] 642 sensor port

[0049] 643 Upper connection port

[0050] 644 Lower connection port

[0051] 645 Seeding Channel

[0052] 65 Photoelectric sensor

[0053] 66 Positive pressure seeding parts

[0054] 661 Housing

[0055] 6611 Airflow Channel

[0056] 66111 Air Inlet

[0057] 66112 First runner

[0058] 66113 Second flow channel

[0059] 66114 Transition channel

[0060] 6612 Seed inlet

[0061] 6613 Bolt Hole

[0062] 6614 Mixing port

[0063] 6615 Mounting boss

[0064] 662 Seed feeding parts

[0065] 6621 Injection ontology

[0066] 6622 Seed feeding channel

[0067] 6623 Feed fastening groove

[0068] 6624 External cone

[0069] 663 Mixed pieces

[0070] 6631 Hybrid Body

[0071] 6632 Half-ring cylindrical mouth

[0072] 6633 Gas Circulation Tank

[0073] 6634 Gas-solid mixing chamber

[0074] 6635 Seedling Cavity

[0075] 6636 Hybrid fastening groove

[0076] 67 Seed guide tube

[0077] 7 Fertilizer discharge mechanism

[0078] 8 Earth covering and suppression mechanism

[0079] 9 Opener DETAILED DESCRIPTION

[0080] The structural principle and working principle of the present invention are described in detail below in conjunction with the accompanying drawings:

[0081] See also Figure 1 , Figure 1The schematic diagram of the structure of a sowing device according to an embodiment of the present invention is shown in FIG. The sowing device of the present invention comprises a straw clearing and blocking prevention mechanism 1, a suspension mechanism 2, a profiling mechanism 3, a transmission mechanism 4, a seed box 5, a positive pressure airflow assisted seeding mechanism 6, a fertilizer discharge mechanism 7, a soil covering and suppressing mechanism 8, and a furrow opener 9. The suspension mechanism 2 can be connected to a tractor or other tractors. During operation, the straw clearing and blocking prevention mechanism 1 first cuts and separates the ground straw to open a clean seed belt, and then the furrow opener 9 opens a suitable seed furrow. The positive pressure airflow assisted seeding mechanism 6 is installed below the seed box 5, and the housing 661 can be installed on the inner side of the double disc furrow opener 9 through the mounting boss 6615, and the seeding device 62 can be driven by the ground wheel; the seeds are transported in the positive pressure airflow assisted seeding mechanism 6 and discharged into the seed furrow under the action of the airflow. The profiling mechanism 3 can preferably be a parallel four-bar linkage mechanism, which can perform real-time profiling with the ground to ensure the consistency of the sowing depth; the fertilizer discharge mechanism 7 performs regular fertilizer discharge according to the transmission ratio set by the transmission mechanism 4, which can prevent the burning of seeds caused by the contact between fertilizer and seeds; finally, the soil covering and pressing mechanism 8 performs soil covering and pressing to complete the entire sowing process. The present invention can also improve the no-tillage seeder, and replace the gravity seed guide tube on the no-tillage seeder with the positive pressure airflow assisted seeding mechanism 6 of the present invention, which can improve the speed of the seeder operation and the sowing quality. The composition, structure, relative position relationship, connection relationship and function of other parts of the sowing device are all relatively mature existing technologies, so they will not be repeated here. The following is a detailed description of the positive pressure airflow assisted seeding mechanism 6 and its positive pressure seeding component 66 of the present invention.

[0082] See also Figure 2 , Figure 2 The structure diagram of the positive pressure airflow assisted seeding mechanism 6 of one embodiment of the present invention. The positive pressure airflow assisted seeding mechanism 6 of the present invention is used to improve the uniformity of sowing, and includes: a positive pressure seeding component 66; a fan 61, which is used to provide positive pressure airflow for the positive pressure seeding component 66, and is connected to the airflow channel 6611 of the positive pressure seeding component 66 through an airflow duct 63, and the inner diameter of the airflow duct 63 is preferably 20mm; a seeding device 62, which is used to carry and clean seeds, and is connected to the seed feeding member 662 of the positive pressure seeding component 66 through a connecting member 64; and a seed guide tube 67, which is connected to the lower end of the mixing member 663 of the positive pressure seeding component 66, and is connected to the seeding cavity 6635 of the mixing member 663, and the seeds are vertically thrown out from the outlet of the seeding cavity 6635. The installation direction of the seed guide tube 67 is opposite to the forward direction of the machine. The inner diameter of the seed entry channel 6622 is the same as the inner diameter of the seed cavity 6635 and the inner diameter of the seed guide tube 67. The minimum inner diameter is 18 mm. In this embodiment, 18 mm is preferred. Experimental verification shows that seeds can be planted with the embryo facing upward under the condition of airflow-assisted transportation in an 18 mm channel, thereby improving the crop growth cycle and increasing yield.

[0083] See also Figure 3 , Figure 3 The schematic diagram of the structure of the seeding device 62 of one embodiment of the present invention is shown in FIG. The seeding device 62 of this embodiment is provided with a driving rotating handle 621, which is connected to the transmission mechanism 4 of the sowing device and driven by the ground wheel or motor of the sowing device to drive the seeding device 62. The seeding device 62 is used to carry and clean seeds, and the seeds are thrown vertically from the seeding port 622.

[0084] See also Figure 4 , Figure 4 The structural schematic diagram of the connecting component 64 of an embodiment of the present invention. The connecting component 64 of this embodiment includes a connecting body 641, on which a seeding channel 645 and a sensor port 642 are provided. The seeding channel 645 runs through the connecting body 641, and the upper connecting port 643 of the seeding channel 645 is connected to the seed metering device 62, and the lower connecting port 644 of the seeding channel 645 is connected to the seeding member 662; the upper connecting port 643 of the connecting component 64 is preferably a rectangular port, which can be connected to the seeding port 622 of various types of seed metering devices 62, and the lower connecting port 644 of the connecting component 64 is preferably a circular column port, which is connected to the upper end of the seeding member 662. The sensor port 642 is provided on both sides of the connecting body 641, and a photoelectric sensor 65 can be installed in the sensor port 642 to monitor the reseeding rate and the missed seeding rate. The sensor port 642 and the photoelectric sensor 65 can be installed using a sealing ring to ensure that dust and other debris cannot enter from the installation port to avoid affecting the measurement performance. Since the photoelectric sensor 65 is at a certain distance from the ground and the seed guide tube 67 has a continuous airflow, dust cannot flow back to the position of the connecting component 64. The high-position installation ensures the monitoring accuracy of the photoelectric sensor 65 and can reduce the impact of dust on the monitoring of the reseeding rate and the missed seeding rate.

[0085] See also Figure 5-Figure 10 , Figure 5 This is a schematic diagram of the structure of the seed feeding member 662 according to an embodiment of the present invention. Figure 6 Schematic diagram of the structure of a mixing element 663 according to an embodiment of the present invention. Figure 7 Schematic diagram of the structure of the housing 661 according to an embodiment of the present invention. Figure 8 This is a schematic diagram of the structure of the housing 661 in another direction according to an embodiment of the present invention. Fig. 9 FIG. 6 is a top view of a housing 661 according to an embodiment of the present invention. Fig.10The positive pressure seeding component 66 of one embodiment of the present invention is a cross-sectional view. The positive pressure seeding component 66 of the present invention comprises: a shell 661, on which an airflow channel 6611, a seed inlet 6612 and a mixing port 6614 are provided, and a cavity is connected between the seed inlet 6612 and the mixing port 6614, and the airflow channel 6611 is connected to the cavity; a seeding member 662, comprising a seeding body 6621, on which a seeding channel 6622 is coaxially provided, which may be a circular hole or a stepped hole passing through the upper and lower ends, and the seeding body 6621 is embedded and installed in the cavity through the seed inlet 6612, and the lower part of the seeding body 6621 is an outer cone 6624; and a mixing member 663, comprising a mixing body 6631, and the mixing body 6631 passes through the The mixing port 6614 is embedded and installed in the cavity, and the mixing body 6631 is provided with a gas-solid mixing chamber 6634 and a seeding chamber 6635 which are interconnected. The upper end of the mixing body 6631 is provided with a semi-cylindrical port 6632, and the lower part of the seeding body 6621 passes through the semi-cylindrical port 6632 to the gas-solid mixing chamber 6634; a gas circulation groove 6633 is formed between the outer cone 6624 and the semi-cylindrical port 6632 and part of the inner wall of the gas-solid mixing chamber 6634, and the gas circulation groove 6633 is connected with the airflow channel 6611 through the semi-cylindrical port 6632; the gas-solid mixing chamber 6634 is respectively connected with the gas circulation groove 6633 and the seeding channel 6622.

[0086] In this embodiment, the seed inlet 6612 and the mixing port 6614 are respectively arranged at two ends of the shell 661, and the air inlet 66111 of the air flow channel 6611 and the seed inlet 6612 are arranged at the same end of the shell 661, and the center line of the air inlet 66111 and the center line of the seed inlet 6612 are not on the same straight line, and there is an eccentric distance h between the two. Preferably, the center line of the air inlet 66111 is 10 mm away from the center line of the seed inlet 6612 in the horizontal direction. Through the oblique installation method, the airflow does not enter directly into the gas circulation groove 6633, but enters with a certain deflection. The airflow can rotate around the narrow slit of the gas circulation groove 6633 to produce a more stable air pressure. A seeding fastening groove 6623 is provided at the lower upper end of the outer wall of the seeding body 6621, which can be a flat groove. A mixing fastening groove 6636 is provided at the upper lower end of the outer wall of the mixing body 6631, which can also be a flat groove. Bolt holes 6613 are respectively provided on the shell 661 corresponding to the seeding fastening groove 6623 and the mixing fastening groove 6636, which are used for fixing and positioning the seeding piece 662 and the mixing piece 663. The seeding fastening groove 6623 is opposite to the bolt hole 6613 at the upper part of the shell 661, and the seeding piece 662 is installed and clamped by bolts. The mixing fastening groove 6636 is opposite to the bolt hole 6613 at the lower part of the shell 661, and the mixing piece 663 is installed and clamped by bolts to prevent parts from falling off due to vibration during high-speed operation during movement, and an external hexagonal screw plug is installed in the bolt hole 6613, so that the airflow can only flow inside the cavity and cannot overflow. The two bolt holes 6613 are located on one side of the housing 661 , and the other side of the housing 661 is a mounting boss 6615 for mounting the housing 661 on the sowing device.

[0087] Among them, the open end of the semi-annular cylindrical opening 6632 faces the air inlet side and is connected to the airflow duct 63, so that the airflow transported by the fan 61 can enter the interior of the mixing element 663. The closed end of the semi-annular cylindrical opening 6632 is located on the same side as the mixing fastening groove 6636. The inner wall of the semi-annular cylindrical opening 6632 and the gas-solid mixing chamber 6634 is an inner conical surface adapted to the outer conical surface 6624. The gas circulation groove 6633 formed by the inner conical surface and the outer conical surface 6624 cooperates with each other to form an annular conical surface narrow slit. The airflow through the matching surface forms an annular airflow, which can accelerate the airflow. At the same time, the airflow enters obliquely from the airflow duct 63, passes through the inner conical surface, forms a rotating airflow in advance, and then enters the gas circulation groove 6633 to form a high-speed airflow, that is, the airflow enters the gas circulation groove 6633 not along the axis, but similarly enters the annular conical surface narrow slit tangently, and the airflow rotates along the gas circulation groove 6633, so that the airflow distribution formed is more uniform. The high-speed airflow enters the seeding cavity 6635 of the mixing element 663 and the seed guide tube 67 to force the seeds to accelerate.

[0088] The airflow channel 6611 of this embodiment includes a first flow channel 66112, a second flow channel 66113 and a transition flow channel 66114. The two ends of the first flow channel 66112 are respectively connected to the air inlet 66111 and one end of the transition flow channel 66114, the other end of the transition flow channel 66114 is connected to one end of the second flow channel 66113, and the other end of the second flow channel 66113 is connected to the semi-circular cylindrical port 6632. The axis of the first flow channel 66112 is parallel to the cavity, the axis of the second flow channel 66113 is perpendicular to the cavity, and the diameter of the transition flow channel 66114 is smaller than the diameters of the first flow channel 66112 and the second flow channel 66113.

[0089] During operation, seeds are dropped by the seed metering device 62, and pass through the connecting component 64 and the positive pressure seed dropping component 66 under the action of gravity. At the lower outlet of the seed inlet 662, low pressure is generated at the lower end of the seed inlet 662 due to the action of the annular airflow, so that the seeds are sucked out from the lower outlet of the seed inlet 662 into the mixing component 663, and are mixed with the accelerated airflow to increase the speed and then transported into the seed guide tube 67 until the seed guidance is completed.

[0090] The present invention is suitable for high-speed sowing. Its positive-pressure airflow-assisted seeding mechanism 6 provides positive-pressure airflow through the fan 61, and realizes zero-speed sowing of seeds in the seed guide tube 67 under high-speed operation conditions, thereby reducing the collision between seeds and the tube wall and the time for seed guidance, improving sowing uniformity, and thus increasing crop yield. It has good crop adaptability, can be adapted to various types of precision seeding devices, and is combined with precision seeding technology for high-speed precision sowing of crops such as corn and soybeans, thereby comprehensively improving sowing quality.

[0091] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A positive pressure seeding component, characterized in that: include: A shell, wherein an airflow channel, a seed inlet and a mixing port are provided on the shell, a cavity is connected between the seed inlet and the mixing port, and the airflow channel is connected with the cavity; A seed feeding member comprises a seed feeding body, a seed feeding channel is coaxially arranged on the seed feeding body, the seed feeding body is installed in the cavity through the seed feeding port, and the lower part of the seed feeding body is an outer cone surface; as well as A mixing element, comprising a mixing body, the mixing body is installed in the cavity through the mixing port, a mixing fastening groove is provided on the outer wall of the mixing body, a gas-solid mixing chamber and a seeding chamber that are interconnected are provided in the mixing body, a semi-cylindrical port is provided at the upper end of the mixing body, and the lower part of the seeding body passes through the semi-cylindrical port to the gas-solid mixing chamber; a gas circulation groove is formed between the outer conical surface, the semi-cylindrical port and a part of the inner wall of the gas-solid mixing chamber, and the gas circulation groove is connected with the gas flow channel through the semi-cylindrical port; the gas-solid mixing chamber is respectively connected with the gas circulation groove and the seeding channel; The seed inlet and the mixing port are respectively arranged at two ends of the shell, the air inlet and the seed inlet are arranged at the same end of the shell, and the center line of the air inlet has an eccentric distance relative to the center line of the seed inlet; The inner wall of the semi-cylindrical opening and the gas-solid mixing chamber is an inner conical surface adapted to the outer conical surface; the gas circulation groove formed by the cooperation between the inner conical surface and the outer conical surface is an annular conical surface slit, so that the airflow passing through the matching surface forms an annular airflow for acceleration; The airflow channel comprises a first flow channel, a second flow channel and a transition flow channel, the two ends of the first flow channel are respectively connected to the air inlet and one end of the transition flow channel, the other end of the transition flow channel is connected to one end of the second flow channel, and the other end of the second flow channel is connected to the semi-annular cylindrical port; the axis of the first flow channel is parallel to the cavity, the axis of the second flow channel is perpendicular to the cavity, and the diameter of the transition flow channel is smaller than the diameters of the first flow channel and the second flow channel; Among them, the open end of the semi-annular cylindrical opening faces the air inlet side and is connected to the air flow channel, so that the airflow transported by the fan can enter the interior of the mixing element; the closed end of the semi-annular cylindrical opening is located on the same side as the mixing fastening groove; the airflow enters obliquely from the air flow channel, passes through the inner cone and rotates along the gas circulation groove, and then enters the gas circulation groove to form a uniformly distributed high-speed airflow; the high-speed airflow enters the seeding chamber and the seed guide tube to force acceleration of the seeds; the lower end of the seed feeder generates low pressure under the action of the annular airflow, and the seeds are sucked out from the lower end outlet of the seed feeder into the mixing element, and after mixing with the high-speed airflow to increase the speed, enter the seed guide tube for transportation until the seed guidance is completed.

2. The positive pressure seeding component according to claim 1, characterized in that: The outer wall of the seeding body is provided with a seeding fastening groove, and the shell body is provided with bolt holes corresponding to the seeding fastening groove and the mixed fastening groove respectively.

3. A positive pressure airflow assisted seeding mechanism, characterized in that: include: The positive pressure seeding component according to claim 1 or 2; A fan connected to the air flow channel of the positive pressure seeding component through an air flow duct; A seed metering device connected to the seed feeding member of the positive pressure seeding component through a connecting component; and The seed guide tube is connected to the lower end of the mixing element of the positive pressure seeding component and is communicated with the seeding cavity of the mixing element.

4. The positive pressure airflow assisted seeding mechanism according to claim 3, characterized in that: The connecting component includes a connecting body, on which a seeding channel and a sensor port are provided. The seeding channel runs through the connecting body, the upper connecting port of the seeding channel is connected to the seed metering device, and the lower connecting port of the seeding channel is connected to the seed feeder; the sensor port is provided on both sides of the connecting body, and a photoelectric sensor is installed in the sensor port.

5. The positive pressure airflow assisted seeding mechanism according to claim 3, characterized in that: The seed metering device is provided with a driving rotating handle, which is connected to the transmission mechanism of the seeding device and is driven by the ground wheel or the motor of the seeding device.

6. A sowing device, characterized in that: It comprises the positive pressure airflow assisted seeding mechanism as described in any one of claims 3-5.

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