Air pressure type precision seed sowing device for sowing vegetables

Abstract

The utility model relates to the technical field of seeding equipment, in particular to an air pressure type precision seed-metering device for sowing vegetables, which comprises a seed-metering box body, a seed-metering wheel arranged in the seed-metering box body, a seed-metering port arranged at the bottom end of the seed-metering box body, a plurality of grooves arranged outside the seed-metering wheel, a plurality of air grooves arranged on the end face of the seed-metering wheel, and an air blowing mechanism arranged on the seed-metering box body. The blowing mechanism comprises an air pipe and an air spraying assembly. The air spraying assembly comprises a protruding pipe, an air spraying head and a pipe connector. According to the air pressure type precise seed sowing device for vegetable seed sowing, through the arrangement of the air blowing mechanism, when the seed sowing wheel rotates to enable an air groove to be aligned with an air spraying head, air in an air pipe is sprayed to the air groove through an air spraying assembly, seeds in a corresponding groove can be actively blown to a seed sowing port, extra power is provided for seed discharging, the seed discharging speed is increased, and the seed sowing efficiency is improved. And the problem of slow falling of light seeds is solved.

Description

Technical Field

[0001] This utility model relates to the field of sowing equipment technology, specifically to a pneumatic precision seed metering device for vegetable sowing. Background Technology

[0002] Utility model patent CN209749111U discloses a double-row self-stirring wheat seed metering device. This device includes a seed box with two identical seed metering devices (left and right) symmetrically arranged inside. Each seed metering device includes a seed metering wheel, a brush, two seed cleaning plates, and a seed metering tube. The outer edge of the seed metering wheel has a flange, a notch, and a matching slot for the seed cleaning plates. The upper half of the seed metering wheel is located inside the seed box, and the lower half is located at the bottom of the seed box. The brush is fixed to the bottom of the seed box at the front end of the seed metering wheel, with the brush bristles in close contact with the front outer edge of the seed metering wheel. Two seed cleaning plates are fixed to one end at the bottom of the seed box near the front end, and the other ends of the two seed cleaning plates are inserted into the matching slots. The upper end of the seed metering tube is located below the front end of the seed cleaning plates. A seed box partition is provided between the left and right seed metering devices. This invention enables single-seed sowing of wheat, falling under the category of precision sowing, which has a significant effect on promoting wheat tillering and increasing wheat yield.

[0003] In this double-row self-stirring wheat seed metering device, after the seeds are released from the seed metering wheel, they fall into the seed metering tube solely by their own gravity, lacking additional power assistance. This results in a slow falling speed for lighter seeds, which can easily lead to accumulation and blockage of the seed metering channel, reducing seed metering efficiency and making it difficult to ensure the timeliness and continuity of seed metering. In view of this, we propose a pneumatic precision seed metering device for vegetable sowing. Utility Model Content

[0004] The purpose of this invention is to provide a pneumatic precision seed metering device for vegetable sowing, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A pneumatic precision seed metering device for vegetable sowing includes a seed metering box, a seed metering wheel rotatably connected inside the seed metering box, the seed metering wheel carrying the seeds out of the seed metering box by rotation, a seed metering port at the bottom of the seed metering box, a number of grooves for carrying out the seeds on the outer surface of the seed metering wheel, a number of air slots arranged in a circular array on the left end face of the seed metering wheel, the air slots communicating with the grooves, and an air blowing mechanism installed on the left end face of the seed metering box, the air blowing mechanism including an air pipe connected to an external air source and an air jet assembly installed on the seed metering box;

[0007] The trachea and the end of the jet assembly are connected;

[0008] The jet assembly includes a convex tube inserted into the seed metering box, a jet head installed at the end of the convex tube, and a pipe connector installed at the beginning of the convex tube. The end of the jet head faces the surface of the seed metering wheel, and the end of the air tube is connected to the pipe connector. When the seed metering wheel rotates so that one of the air grooves is aligned with the jet head, the gas in the air tube passes through the pipe connector, the convex tube and the jet head in sequence and is sprayed into the air groove, so that the seeds in the corresponding groove of the air groove are blown into the seed metering port by the airflow.

[0009] Preferably, the seed metering box body has a wheel groove, the seed metering wheel is installed in the wheel groove and is rotatably connected to the seed metering box body, and the side wall of the wheel groove has a discharge port that communicates with the inside of the seed metering port;

[0010] In this setup, the groove provides rotation space for the seed metering wheel, and the discharge port connects the groove and the seed metering port to form a seed discharge path.

[0011] Preferably, the top of the seed metering box is provided with a seed storage trough for storing seeds, and the bottom of the seed storage trough is provided with an opening that communicates with the wheel groove. When the seed metering wheel rotates toward the discharge outlet, the seeds in the seed storage trough are gradually filled into the groove through the opening under the action of gravity and the force generated by the rotation of the seed metering wheel, until the groove is filled with seeds.

[0012] In this setup, the seed storage trough works in conjunction with the opening, and the seeds are automatically filled into the groove by gravity and the rotation of the seed metering wheel, thus achieving quantitative seed pickup.

[0013] Preferably, a seed dispensing tube is sleeved at the bottom of the seed dispensing port, and a baffle with an arc-shaped plate structure is vertically fixed on the top inner wall of the seed dispensing port. Seeds blown out from the outlet will hit the baffle and fall down along the baffle.

[0014] In this setup, the seed metering tube guides the seeds out, and the baffle changes the direction of seed movement, causing the seeds to fall in an orderly manner along the baffle and avoiding splashing.

[0015] Preferably, a control valve is connected to the air pipe, and the control valve is used to control the amount of airflow from the air pipe into the jet assembly;

[0016] In this setting, the control valve can adjust the airflow to adapt to the discharge requirements of different types of seeds, thus improving the versatility of the device.

[0017] Preferably, the trachea sleeve is provided with several fixing seats, and the ends of the fixing seats are fixed to the outer surface of the seed metering box.

[0018] In this setup, the mounting bracket secures the air tube to the seed box, ensuring a stable connection of the air blowing mechanism and preventing shaking during airflow transmission.

[0019] Preferably, the outer surface of the seed metering box is provided with a mounting hole for installing a convex tube. The tail end of the convex tube is inserted into and fixed in the mounting hole. The head end of the convex tube is provided with a convex seat. The head end of the convex seat is provided with a through hole. The pipe joint is threadedly connected to the head end of the through hole.

[0020] In this setup, the mounting hole and the convex tube are fitted together for fixation, and the threaded pipe joint facilitates disassembly and maintenance, ensuring that the jet assembly is securely installed.

[0021] Preferably, the jet head has a boss at its front end, and a spray hole is opened at the front end of the boss. The boss is threadedly connected to the tail end of the through hole.

[0022] In this configuration, the boss is threaded to the through hole, which securely mounts the jet head on the protruding tube, and the nozzle ensures that the airflow is concentrated and sprayed into the air slot.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] This pneumatic precision seed metering device for vegetable sowing incorporates an air-blowing mechanism. When the seed metering wheel rotates and aligns the air groove with the jet nozzle, gas from the air pipe is sprayed into the air groove via the jet assembly. This actively blows the seeds in the corresponding groove towards the seed metering port. This design provides additional power for seed expulsion, allowing the seeds to be quickly blown out by the airflow after being carried out, thus increasing the seed expulsion speed and addressing the issue of slower descent of lighter seeds. This ensures the smoothness and continuity of the seed metering process, contributing to improved seed metering efficiency and uniformity. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a cross-sectional view of the seed metering box in this utility model;

[0027] Figure 3 This is a schematic diagram of the seeding wheel in this utility model;

[0028] Figure 4 This is a schematic diagram of the air blowing mechanism in this utility model;

[0029] Figure 5 This is an exploded view of the jet assembly in this utility model;

[0030] Figure 6 This is a schematic diagram showing the position of the seed conveying wheel when the seeds are blown out by the air blowing mechanism in this utility model;

[0031] The meanings of the labels in the diagram are as follows:

[0032] 100. Seed metering box body; 110. Wheel groove; 111. Discharge outlet; 120. Seed storage tank; 121. Through-hole; 130. Seed metering port; 140. Seed metering pipe; 150. Baffle;

[0033] 200, Seed metering wheel; 210, Groove; 220, Air groove;

[0034] 300. Air blowing mechanism; 310. Air pipe; 311. Control valve; 312. Fixing base; 320. Air jet assembly; 321. Protruding pipe; 3211. Protruding seat; 3212. Through hole; 322. Air jet head; 3221. Boss; 3222. Spray hole; 323. Pipe connector. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Please see Figures 1-6 A pneumatic precision seed metering device for vegetable sowing includes a seed metering box 100, a seed metering wheel 200 inside the seed metering box 100, a wheel groove 110 inside the seed metering box 100, the seed metering wheel 200 installed in the wheel groove 110 and rotatably connected to the seed metering box 100, a seed storage trough 120 for storing seeds at the top of the seed metering box 100, an opening 121 at the bottom of the seed storage trough 120 communicating with the wheel groove 110, a seed metering port 130 at the bottom of the seed metering box 100, several grooves 210 for carrying out seeds on the outer surface of the seed metering wheel 200, and an outlet 111 on the side wall of the wheel groove 110 communicating with the inside of the seed metering port 130. The groove 110 provides rotation space for the seed metering wheel 200. The seed storage trough 120 cooperates with the opening 121 to facilitate the entry of seeds into the groove 210 by gravity and the rotational force of the seed metering wheel 200. The discharge outlet 111 and the seed metering port 130 form a seed discharge channel to ensure that the seeds can be discharged smoothly. When the seed metering wheel 200 rotates toward the discharge outlet 111, the seeds in the seed storage trough 120 are gradually filled into the groove 210 through the opening 121 under the action of gravity and the force generated by the rotation of the seed metering wheel 200 until the groove 210 is filled with seeds. As the seed metering wheel 200 continues to rotate, when the seed metering wheel 200 carries the seeds in the seed metering box 100 to the position of the discharge outlet 111, the seeds in the groove 210 fall into the seed metering port 130 through the discharge outlet 111 under the action of gravity and are discharged outward.

[0037] like Figure 1 , Figure 2 and Figure 6 As shown, in this utility model, a seed metering tube 140 is sleeved at the bottom of the seed metering port 130. The seed metering tube 140 cooperates with the seed metering port 130 to guide the seeds to be discharged.

[0038] like Figure 1 and Figures 3-6 As shown, specifically, the left end face of the seed metering wheel 200 has several air grooves 220 arranged in a circular array. The air grooves 220 are connected to the grooves 210. An air blowing mechanism 300 is installed on the left end face of the seed metering box 100. The air grooves 220 are connected to the grooves 210. In conjunction with the air blowing mechanism 300, it provides additional power for seed discharging. The air blowing mechanism 300 includes an air pipe 310 connected to an external air source and an air jet assembly 320 installed on the seed metering box 100. The ends of the air pipe 310 and the air jet assembly 320 are connected. The air pipe 310 and the air jet assembly 320 together form the air blowing mechanism 300, realizing the functions of gas transmission and jetting.

[0039] like Figure 1 , Figure 4 and Figure 5 As shown, the jet assembly 320 further includes a protruding tube 321 inserted into the seed metering box 100, a jet head 322 installed at the end of the protruding tube 321, and a pipe connector 323 installed at the beginning of the protruding tube 321. The end of the jet head 322 faces the surface of the seed metering wheel 200, and the end of the air pipe 310 is connected to the pipe connector 323. The protruding tube 321, the jet head 322, and the pipe connector 323 constitute the jet assembly 320, which defines the gas injection path and ensures that the gas can be accurately sprayed into the air groove 220.

[0040] like Figure 4 As shown, a control valve 311 is connected to the air pipe 310. The control valve 311 is used to control the airflow from the air pipe 310 into the jet assembly 320. The control valve 311 can adjust the airflow as needed to adapt to the discharge requirements of different seeds. Several fixing seats 312 are provided on the outer sleeve of the air pipe 310. The ends of the fixing seats 312 are fixed to the outer surface of the seed metering box 100. The fixing seats 312 fix the air pipe 310 to the seed metering box 100 to ensure the stability of the blowing mechanism 300.

[0041] like Figure 5As shown, it is worth noting that the outer surface of the seed metering box 100 has mounting holes for installing the protruding tube 321. The tail end of the protruding tube 321 is inserted into and fixed in the mounting hole. The head of the protruding tube 321 has a boss 3211, and the head end of the boss 3211 has a through hole 3212. The pipe connector 323 is threaded to the opening at the head end of the through hole 3212. The head of the jet nozzle 322 has a boss 3221, and the head end of the boss 3221 has a spray hole 3222. The boss 3221 is threaded to the opening at the tail end of the through hole 3212. The structural design of the mounting hole, boss 3211, through hole 3212, pipe connector 323, boss 3221, and spray hole 3222 achieves a stable connection and precise assembly between the components of the jet assembly 320, ensuring the gas jet effect.

[0042] As can be added, when the seed metering wheel 200 rotates so that one of the air grooves 220 aligns with the jet nozzle 322, the gas in the air pipe 310 passes sequentially through the pipe joint 323, the convex pipe 321, and the jet nozzle 322 before being sprayed into the air groove 220. This causes the seeds in the corresponding groove 210 of the air groove 220 to be blown by the airflow towards the discharge outlet 111 and into the seed metering port 130. A baffle 150 with an arc-shaped plate structure is vertically fixed on the top inner wall of the seed metering port 130. Seeds blown out of the discharge outlet 111 will hit the baffle 150 and fall downwards along the baffle 150. The baffle 150 can change the direction of seed movement, so that the seeds fall in an orderly manner and avoid seed splashing.

[0043] In this embodiment, the pneumatic precision seed metering device for vegetable sowing is used as follows: First, the seeds are poured into the seed storage trough 120. Under the action of gravity and the rotation of the seed metering wheel 200, the seeds fill the groove 210 of the seed metering wheel 200 through the opening 121. Then, the seed metering wheel 200 continues to rotate, bringing the seed-filled groove 210 to the discharge outlet 111. Next, when the air groove 220 on the seed metering wheel 200 is aligned with the jet nozzle 322, the gas in the air pipe 310 is sprayed into the air groove 220 through the jet assembly 320, blowing the seeds in the corresponding groove 210 toward the discharge outlet 111. Finally, the seeds enter the seed metering port 130 through the discharge outlet 111, hit the baffle 150 and fall along the baffle 150, and are discharged through the seed metering pipe 140 for sowing.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pneumatic precision seed metering device for vegetable sowing, comprising a seed metering box (100), wherein a seed metering wheel (200) is rotatably connected inside the seed metering box (100), and the seed metering wheel (200) carries the seeds out of the seed metering box (100) by rotation, characterized in that: The seed metering box (100) has a seed metering port (130) at its bottom end. The seed metering wheel (200) has several grooves (210) on its outer surface for carrying out seeds. The seed metering wheel (200) has several air grooves (220) in a circular array on its left end face. The air grooves (220) are connected to the grooves (210). An air blowing mechanism (300) is installed on the left end face of the seed metering box (100). The air blowing mechanism (300) includes an air pipe (310) connected to an external air source and an air jet assembly (320) installed on the seed metering box (100). The ends of the trachea (310) and the jet assembly (320) are connected; The jet assembly (320) includes a convex tube (321) inserted into the seed metering box (100), a jet head (322) installed at the end of the convex tube (321), and a pipe connector (323) installed at the beginning of the convex tube (321). The end of the jet head (322) faces the surface of the seed metering wheel (200), and the end of the air pipe (310) is connected to the pipe connector (323). When the seed metering wheel (200) rotates so that one of the air grooves (220) is aligned with the jet head (322), the gas in the air pipe (310) passes through the pipe connector (323), the convex tube (321) and the jet head (322) in sequence and is sprayed into the air groove (220), so that the seeds in the corresponding groove (210) of the air groove (220) are blown into the seed metering port (130) by the airflow.

2. The pneumatic precision seed metering device for vegetable sowing according to claim 1, characterized in that: The seed metering box (100) has a wheel groove (110) inside, and the seed metering wheel (200) is installed in the wheel groove (110) and rotatably connected to the seed metering box (100). The side wall of the wheel groove (110) has a discharge outlet (111) that communicates with the inside of the seed metering port (130).

3. The pneumatic precision seed metering device for vegetable sowing according to claim 2, characterized in that: The top of the seed metering box (100) is provided with a seed storage trough (120) for storing seeds. The bottom of the seed storage trough (120) is provided with a through-hole (121) that communicates with the wheel groove (110). When the seed metering wheel (200) rotates toward the discharge outlet (111), the seeds in the seed storage trough (120) are gradually filled into the groove (210) through the through-hole (121) under the action of gravity and the force generated by the rotation of the seed metering wheel (200) until the groove (210) is filled with seeds.

4. The pneumatic precision seed metering device for vegetable sowing according to claim 2, characterized in that: The bottom end of the seed dispensing port (130) is fitted with a seed dispensing tube (140), and a baffle (150) with an arc-shaped plate structure is vertically fixed on the top inner wall of the seed dispensing port (130). Seeds blown out from the outlet (111) will hit the baffle (150) and fall down along the baffle (150).

5. The pneumatic precision seed metering device for vegetable sowing according to claim 1, characterized in that: A control valve (311) is connected to the air pipe (310), and the control valve (311) is used to control the amount of airflow from the air pipe (310) into the jet assembly (320).

6. The pneumatic precision seed metering device for vegetable sowing according to claim 1, characterized in that: The trachea (310) is covered with several fixing seats (312), and the ends of the fixing seats (312) are fixed to the outer surface of the seed box (100).

7. The pneumatic precision seed metering device for vegetable sowing according to claim 1, characterized in that: The outer surface of the seed box (100) is provided with a mounting hole for installing a protruding tube (321). The tail of the protruding tube (321) is inserted into and fixed in the mounting hole. The head of the protruding tube (321) is provided with a protruding seat (3211). The head end of the protruding seat (3211) is provided with a through hole (3212). The pipe connector (323) is threadedly connected to the opening of the head end of the through hole (3212).

8. The pneumatic precision seed metering device for vegetable sowing according to claim 7, characterized in that: The jet head (322) has a boss (3221) at its head end, and a nozzle (3222) is opened at the head end of the boss (3221). The boss (3221) is threaded to the tail end of the through hole (3212).

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