Electric corn sowing device

Abstract

The invention discloses an electric corn sowing device, which relates to the field of agricultural machinery, including a sowing machine and a sowing box on the sowing machine, and also including a bin body, a screening device and a sorting device. The bin body includes a corn bin with a valve at the bottom, the screening device includes an arc-shaped spring piece arranged below the corn bin, the middle part of the arc-shaped spring piece is convex, one end of the arc-shaped spring piece is higher than the other end, a height difference is arranged between the valve and the arc-shaped spring piece, a first corn box is arranged outside the end with a lower height of the arc-shaped spring piece, a movable partition is arranged in the middle of the first corn box, and the sorting device is used for screening corn seeds and storing them in the sowing box; so as to solve the problem in the prior art that impurities such as sand and gravel with a weight similar to or greater than that of corn kernels are mixed into corn seeds and cannot be effectively removed.

Description

Technical Field

[0001] The invention relates to the field of agricultural machinery, and in particular to an electric corn sowing device. Background Art

[0002] Corn has high nutritional value and is an excellent food crop. It has strong drought resistance, cold resistance, barrenness resistance and excellent environmental adaptability. It is an important food crop in my country. The quality of corn seeds is directly related to farmers' income. Therefore, before sowing, corn seeds need to be screened to remove impurities in the corn seeds and distinguish seeds of different sizes.

[0003] In the prior art, the screening device and the sowing device are usually separated, and two different devices are required to complete the work, and it is impossible to achieve dual purposes with one machine. In addition, the screening device usually uses airflow to blow away light impurities, but for impurities such as sand and gravel that are similar in weight to corn kernels or heavier than corn kernels, it is impossible to find a suitable airflow size to separate them from the corn kernels, resulting in impurities entering the subsequent screening device or sowing device, affecting the operation of the device, including affecting the screening of seeds of different sizes, blocking the pores of the screening device or the sowing device, embedding corn seeds to make the seeds flow smoothly, and damaging the device. Summary of the invention

[0004] The invention provides a corn electric seeding device to solve the problem in the prior art that impurities such as sand and gravel with a weight similar to or greater than that of corn kernels are mixed into corn seeds and cannot be effectively removed.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A corn electric sowing device includes a seeder and a sowing box located on the seeder, and also includes a bin body, a screening device, and a sorting device. The bin body includes a corn bin with a valve provided at the bottom. The screening device includes an arc-shaped spring piece arranged below the corn bin, the middle part of the arc-shaped spring piece is convex, one end of the arc-shaped spring piece is higher than the other end, a height difference is provided between the valve and the arc-shaped spring piece, a first corn box is provided on the outer side of the lower end of the arc-shaped spring piece, and a movable partition is provided in the middle of the first corn box. The sorting device is used to screen the corn seeds and store them in the sowing box.

[0007] The present invention allows impurities such as sand and gravel heavier than corn kernels to be mixed with corn seeds and dropped from the same height onto the same arc-shaped spring pieces, and utilizes the difference in weight between the impurities such as sand and gravel and the corn seeds to obtain different rebound forces when dropped onto the arc-shaped spring pieces. The impurities and corn seeds are separated by different heights after rebounding through the arc-shaped spring pieces, and the impurities and corn seeds rebounded into the first corn box are effectively separated by adjusting the position of the movable partition. In order to enhance the separation effect, the separated impurities or corn seeds can also be rebounded by the arc-shaped spring pieces for multiple times to improve the separation effect. At the same time, the screening device can be installed on the seeder to achieve the purpose of one machine with two uses.

[0008] Furthermore, a guide plate with an adjustable tilt angle is installed at the bottom of the corn bin, and the length of the valve is equal to the length of the guide plate.

[0009] By adjusting the inclination angle of the guide plate, the height and direction of the corn seeds falling can be changed. At the same time, the guide plate can also control the amount and speed of a large number of corn seeds flowing out of the bin together with the valve, so that the corn seeds slide down evenly along the guide plate, preventing a large number of corn seeds from falling together, so that the corn seeds and impurities are blocked by the subsequent corn seeds and impurities before they rebound through the arc-shaped spring pieces and fall, affecting the separation effect.

[0010] Furthermore, the guide plate is a hollow structure, comprising a top plate and a bottom plate, the top plate is provided with a plurality of through holes for impurities to pass through, the lower end of the bottom plate is provided with an opening, the lower end of the opening is provided with a guide plate, and the lower end of the guide plate is located on the side of the arc-shaped spring sheet away from the first corn box.

[0011] Impurities such as sand and gravel, which are similar in weight to corn kernels, have a smaller volume than corn seeds. Therefore, when corn seeds pass through the guide plate, impurities with a smaller volume than the corn seeds enter the guide plate through the through holes, and are then transported to the impurity storage box through the opening and the guide plate, thus completing the separation of impurities such as sand and gravel, which are smaller in volume than the corn seeds.

[0012] Furthermore, the sorting device includes a corn conveying device, a plurality of limiters for screening corn sizes and a plurality of second corn boxes installed below the limiters, the bottom of the second corn boxes are each provided with an electromagnetic valve, and the sowing box is located below the second corn box.

[0013] The corn seeds are transported one by one to the limiting part through the corn conveying device for size classification and stored in the corresponding second corn box, thereby realizing the purpose of automatic separation of corn seeds by size. Then, the corn seeds of corresponding size are placed in the sowing box for sowing by controlling the solenoid valve, thereby realizing the purpose of automatically placing corn seeds of corresponding size specifications.

[0014] Furthermore, the corn conveying device includes two conveying wheels and a conveyor belt mounted on the two conveying wheels, air suction holes are evenly opened on the side wall of the conveyor belt, and the air suction holes are connected to the air pump, and one of the conveying wheels is located in the first corn box.

[0015] The corn seeds in the first corn box are sucked through the air suction holes and then transported to the subsequent process by the conveyor belt. The process runs automatically, reducing manpower consumption.

[0016] Furthermore, a plurality of the limiting members are arranged on both sides of the conveyor belt along the transmission direction of the conveyor belt, and each of the limiting members is provided with a screening hole for screening corn, and the size of the screening hole gradually decreases along the transmission direction of the conveyor belt.

[0017] The air suction holes on the conveyor belt absorb and transport the corn seeds, and pass through the screening holes. The corn seeds that cannot pass through the screening holes will be blocked, and after leaving the air suction holes, they will fall into the corn box for collection. The corn seeds can be classified according to size through several screening holes of gradually decreasing size.

[0018] Furthermore, the limiting member includes an upper baffle and a lower baffle that are slidably connected, the upper baffle is fixedly installed, a groove for accommodating the lower baffle is provided at the lower end of the upper baffle, a tension spring is provided between the upper baffle and the lower baffle, an upper notch is provided on the upper baffle, and a lower notch is provided on the lower baffle, and the upper notch and the lower notch are combined to form the screening hole.

[0019] Since corn seeds are cone-shaped, that is, one end is thick and the other end is thin, they are very easy to get stuck in the screening hole, blocking the screening channel and making the device unable to operate normally. Therefore, by setting the limit members as upper and lower baffles, the groove and the lower baffle cooperate with each other to slide, and the tension spring is used to close the upper and lower baffles. By pulling the lower baffle to expand the screening hole, the corn seeds stuck therein can be disengaged to prevent them from blocking the screening channel.

[0020] Furthermore, a through hole connected to the groove is provided on the upper baffle plate, and the upper end of the lower baffle plate is set as a split tip. When the upper baffle plate and the lower baffle plate are matched and installed, the side wall of the split tip is located on one side of the through hole. A plurality of limit rods are provided on the conveyor belt, and the limit rods are installed between two adjacent air suction holes. The limit rods are used to move the lower baffle plate downward through the through hole.

[0021] By setting the upper end of the lower baffle plate as a split point, after the upper baffle plate and the lower baffle plate are closed, the split point portion is located in the through hole. When the limit rod on the conveyor belt passes through the through hole, the lower baffle plate moves downward, the screening hole is expanded, and the corn seeds stuck therein are disengaged to prevent them from blocking the screening channel. The function of automatically cleaning the blocked corn seeds is realized, and manpower consumption is reduced.

[0022] Furthermore, the sorting device also includes an upper plate installed above the conveyor belt and a lower plate installed below the conveyor belt, the ends of the upper plate and the lower plate are respectively located on both sides of the moving path of the air suction hole, and the upper plate and the lower plate are used to adjust the posture of the corn adsorbed on the air suction hole.

[0023] Since there is randomness when the air suction holes adsorb corn seeds, that is, the thin end of the corn seeds may face any side, when the long side of the corn seeds passes through the screening hole, it will not be able to pass through, and when the short side of the corn seeds passes through the screening hole, it can pass smoothly, resulting in screening errors or increasing the number of screening times. Therefore, the posture of the corn seeds is adjusted by the upper and lower plates so that the thin end of the corn seeds faces the screening hole or away from the screening hole, so that the corn seeds always pass through the screening hole with the short side. The screening of the corn seeds can be completed by adjusting the difference in size between the screening hole and the short side of the corn seeds.

[0024] Furthermore, a reflux channel is provided below the upper and lower plates, and the reflux channel is connected to the first corn box.

[0025] Due to the randomness of the air suction holes when adsorbing corn seeds, that is, the thin end of the corn seeds may face any side, including lying flat, standing upright, and standing sideways. When the corn seeds are adsorbed while standing upright or standing sideways, the height of the corn seeds is greater than the height of the screening holes and cannot pass through. They are blocked by the limiters and fall into the reflux channel and return to the first corn box to wait for secondary adsorption.

[0026] Most corn seeds have a flat trapezoidal columnar structure. The trapezoidal sides of most corn seeds are longer than the two bases. Therefore, in this scheme, the two bases of the trapezoid are defined as short sides, and the sides are defined as long sides. The flat corn seeds are thin, so the flat side is adsorbed by the air suction holes and defined as a lying state, the plane where the two bases (short sides) are adsorbed by the air suction holes and defined as an upright state, and the plane where the sides (long sides) are adsorbed by the air suction holes and defined as a sideways state.

[0027] One or more technical solutions provided by the present invention have at least the following technical effects or advantages:

[0028] (1) The present invention separates the impurities from the corn seeds by dropping impurities such as sand and gravel heavier than corn kernels from the same height onto an arc-shaped spring sheet, utilizing the different gravitational potential energies obtained by the impurities and corn seeds and the different heights after rebounding from the arc-shaped spring sheet. The impurities rebounding into the first corn box are effectively separated from the corn seeds by adjusting the position of the movable partition. At the same time, the screening device can be installed on the seed drill, thereby achieving the purpose of one machine with two uses.

[0029] (2) Through the hollow guide plate, impurities such as sand and gravel with a weight similar to that of corn kernels and a volume smaller than corn seeds are cleaned, and the impurities are transported to the impurity storage box through the opening and the guide plate, completing the separation of impurities such as sand and gravel with a volume smaller than corn seeds;

[0030] (3) The corn seeds are adsorbed and transported through the air suction holes on the conveyor belt and pass through the screening holes. The corn seeds that cannot pass through the screening holes will be blocked and fall into the corn box for collection after leaving the air suction holes. The corn seeds can be classified according to size through a number of screening holes with gradually decreasing sizes;

[0031] (4) The limiting member is set as an upper baffle and a lower baffle, the groove and the lower baffle cooperate with each other to slide, the upper baffle and the lower baffle are closed by a tension spring, and the screening hole is enlarged by pulling the lower baffle, so that the corn seeds stuck therein are disengaged to prevent them from blocking the screening channel;

[0032] (5) By setting the upper end of the lower baffle plate as a split tip, after the upper baffle plate and the lower baffle plate are closed, the split tip portion is located in the through hole. When the limit rod on the conveyor belt passes through the through hole, the lower baffle plate moves downward, so that the screening hole is enlarged, and the corn seeds stuck in it are separated to prevent them from blocking the screening channel, thereby realizing the function of automatically cleaning the blocked corn seeds and reducing manpower consumption;

[0033] (6) The posture of the corn seeds is adjusted by the upper and lower plates so that the thin end of the corn seeds faces the screening hole or faces away from the screening hole, so that the corn seeds always pass through the screening hole with their short sides. The screening of the corn seeds can be completed by simply adjusting the difference in size between the screening hole and the short side of the corn seeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of the present invention, and do not constitute a limitation on the embodiments of the present invention;

[0035] Figure 1 It is a cross-sectional view of the overall structure of the device in the present invention;

[0036] Figure 2 is a cross-sectional view of the guide plate structure in the present invention;

[0037] Figure 3 It is a schematic diagram of the structure of the corn conveying device in the present invention;

[0038] Figure 4 It is a schematic diagram of the structure of the upper baffle in the present invention;

[0039] Figure 5 It is a schematic diagram of the structure of the lower baffle in the present invention;

[0040] Figure 6It is a schematic diagram of the matching structure of the upper baffle and the lower baffle in the present invention;

[0041] Among them, 101-corn bin, 102-valve, 103-first corn box, 104-partition, 105-guide plate, 106-top plate, 107-bottom plate, 108-through hole, 109-opening, 110-guide plate, 2-arc-shaped spring clip, 3-corn conveying device, 301-transmission wheel, 302-conveyor belt, 303-air suction hole, 304-limiting rod, 4-limiting member, 401-screening hole, 402-upper baffle, 403-lower baffle, 404-groove, 405-upper notch, 406-lower notch, 407-through hole, 408-splitting tip, 5-second corn box, 6-upper dial plate, 7-lower dial plate, 8-reflux channel. DETAILED DESCRIPTION

[0042] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those within the scope of this description. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0044] Example 1

[0045] This embodiment provides a corn electric seeding device, such as Figure 1-Figure 6 As shown, it includes a seeder and a seeding box located on the seeder, and also includes a bin body, a screening device, and a sorting device. The bin body includes a corn bin 101 with a valve 102 at the bottom. The screening device includes an arc-shaped spring piece 2 arranged below the corn bin 101, the middle part of the arc-shaped spring piece 2 is convex, one end of the arc-shaped spring piece 2 is higher than the other end, a height difference is set between the valve 102 and the arc-shaped spring piece 2, a first corn box 103 is set on the outer side of the lower end of the arc-shaped spring piece 2, and a movable partition 104 is set in the middle of the first corn box 103. The sorting device is used to screen the corn seeds and store them in the seeding box.

[0046] Among them, the warehouse body includes a corn seed storage warehouse, a transfer box in the screening and sorting process, an impurity storage box, etc., and the specific number and type are determined according to the needs of the user during the use of the device; the corn warehouse 101 adopts a warehouse body structure with a conical bottom edge, a long strip opening is opened at the lowest end, and a long strip valve 102 is arranged at the opening, which can be a manual valve or an electric valve; the curvature and elasticity of the arc spring piece 2 are determined according to the specific situation, and a 1 / 4 arc spring piece is preferably used; the height difference between the valve 102 and the arc spring piece 2 is determined according to the needs to ensure that the corn seeds and impurities can bounce up; the partition 104 can be moved manually or electrically. When moving electrically, an image processing system and a control center can be arranged above the first corn box 103 to identify corn seeds and sand and gravel impurities that fall into both sides of the partition 104, and then the partition 104 is controlled to move left and right through the control center, so that the corn seeds and sand and gravel impurities fall into both sides of the partition 104 respectively;

[0047] In this embodiment, the screening device only has an arc-shaped spring piece 2 for screening impurities such as corn seeds and sand and gravel. The remaining screening devices are all implemented using existing technologies, which are not limited in this embodiment, including the installation of a fan to clean up light impurities such as dust, floating fibers, and corn silk.

[0048] In a more preferred embodiment, it also includes a material returning device. When the image processing system detects that corn seeds are mixed with a large amount of sand and gravel or sand and gravel are mixed with a large amount of corn seeds in the first corn box 103, the valve 102 is closed by the control center, and the corn seeds or sand and gravel in the first corn box 103 are returned to the corn bin 101 by manual labor, lifting platform, etc., and then the valve 102 is opened to continue screening.

[0049] In a more preferred embodiment, a guide plate 105 with an adjustable tilt angle is installed at the bottom of the corn bin 101 , and the length of the valve 102 is equal to the length of the guide plate 105 .

[0050] Among them, the upper end of the guide plate 105 is connected to the bottom of the corn bin 101 through a rotating shaft with damping. The length of the guide plate 105 can be set to be longer, such as 15-20 cm, to leave enough sliding distance for corn seeds and sand and gravel to spread out and avoid concentrating in one place and falling onto the arc-shaped spring piece 2, affecting the separation effect.

[0051] In a more preferred embodiment, the guide plate 105 is a hollow structure, and the guide plate 105 includes a top plate 106 and a bottom plate 107. The top plate 106 is provided with a plurality of through holes 108 for impurities to pass through. The bottom end of the bottom plate 107 is provided with an opening 109, and the lower end of the opening 109 is provided with a guide plate 110. The lower end of the guide plate 110 is located on the side of the arc-shaped spring piece 2 away from the first corn box 103.

[0052] Among them, the height of the hollow structure, the size of the through hole 108 and the opening 109 are larger than the size of the impurities to prevent jamming. The length of the corn seeds is 8mm-17mm and the width is 5mm-9mm. Therefore, the diameter of the through hole 108 is smaller than the diameter of the corn seeds, preferably less than 5mm. The number of through holes 108 is arbitrary and evenly arranged on the top plate 106. The opening 109 is arranged at the lowest end of the bottom plate 107, and the lowest end of the guide plate 110 is connected to the impurity box.

[0053] Example 2

[0054] On the basis of Example 1, Figure 1-Figure 6 As shown, the sorting device includes a corn conveying device 3, a plurality of limit members 4 for screening the size of corn and a plurality of second corn boxes 5 installed below the limit members 4, and a solenoid valve is provided at the bottom of the second corn box 5. The sowing box is located below the second corn box 5.

[0055] Among them, the corn conveying device 3 is preferably an air suction conveyor belt, which is convenient for adsorbing and removing corn seeds and is more suitable for this solution. The limiter 4 is arranged to be a detachable and replaceable structure. The number of limiters 4 and the size of screening holes are determined according to the requirements of corn seed classification. The number of second corn boxes 5 corresponds to the number of limiters 4 one by one. The bottom of the second corn box 5 is preferably arranged to be a cone shape. The solenoid valve is installed at the bottom of the cone to facilitate the placement of corn seeds. The solenoid valve is controlled by the control center.

[0056] In a more preferred embodiment, the corn conveying device 3 includes two conveying wheels 301 and a conveyor belt 302 mounted on the two conveying wheels 301, and air suction holes 303 are evenly opened on the side walls of the conveyor belt 302. The air suction holes 303 are connected to an air pump, and one of the conveying wheels 301 is located in the first corn box 103.

[0057] The conveyor belt 302 has a certain thickness to facilitate the arrangement of a gas passage therein, and the diameter of the air suction hole 303 is smaller than the short side of the corn seed, preferably smaller than 5 mm.

[0058] In a more preferred embodiment, a plurality of the limiting members 4 are arranged on both sides of the conveyor belt 302 along the transmission direction of the conveyor belt 302, and each of the limiting members 4 is provided with a screening hole 401 for screening corn, and the size of the screening hole 401 gradually decreases along the transmission direction of the conveyor belt 302.

[0059] Since the air suction hole 303 is opened on the side wall of the conveyor belt 302, the two legs of the limiting member 4 are located on the side wall, one of which is located above the conveyor belt 302, and the other is located below the conveyor belt 302, so that the limiting member 4 and the two legs are bridged on both sides of the conveyor belt 302, the side wall of the limiting member 4 is close to the side wall of the conveyor belt 302, and the screening hole 401 is located on the side of the moving path of the air suction hole 303.

[0060] In a more preferred embodiment, the limit member 4 includes an upper baffle 402 and a lower baffle 403 that are slidably connected, the upper baffle 402 is fixedly installed, a groove 404 for accommodating the lower baffle 403 is provided at the lower end of the upper baffle 402, a tension spring is provided between the upper baffle 402 and the lower baffle 403, an upper notch 405 is provided on the upper baffle 402, and a lower notch 406 is provided on the lower baffle 403, and the upper notch 405 and the lower notch 406 are combined to form the screening hole 401.

[0061] Among them, the initial state of the tension spring is to pull the upper baffle 402 and the lower baffle 403 to a completely closed state. The lower baffle 403 can be suspended and supported by the upper baffle 402, or a sliding bracket can be set, the bracket is fixedly installed, and the bracket is slidably connected to the lower baffle 403; the edges of the upper notch 405 and the lower notch 406 are rounded to prevent the corn seeds from being cut.

[0062] In a more preferred embodiment, a through hole 407 connected to the groove 404 is provided on the upper baffle plate 402, and the upper end of the lower baffle plate 403 is set as a split tip 408. When the upper baffle plate 402 and the lower baffle plate 403 are matched and installed, the side wall of the split tip 408 is located on one side of the through hole 407. A plurality of limit rods 304 are provided on the conveyor belt 302, and the limit rods 304 are installed between two adjacent air suction holes 303. The limit rods 304 are used to move the lower baffle plate 403 downward through the through hole 407.

[0063] Among them, the through hole 407 is located on the side of the upper notch 405 away from the lower notch 406, and the height of the through hole 407 is greater than the height of the screening hole 401. After the upper baffle 402 and the lower baffle 403 cooperate, the splitting tip 408 can be located in the through hole 407. The number of limiting rods 304 is determined according to the number of air suction holes 303. Preferably, a limiting rod 304 is arranged between every two air suction holes 303, and the height of the limiting rod 304 is equal to the height of the through hole 407.

[0064] Example 3

[0065] On the basis of Example 2, Figure 1-Figure 6As shown, the sorting device also includes an upper plate 6 installed above the conveyor belt 302 and a lower plate 7 installed below the conveyor belt 302. The ends of the upper plate 6 and the lower plate 7 are respectively located on both sides of the moving path of the air suction hole 303. The upper plate 6 and the lower plate 7 are used to adjust the posture of the corn adsorbed on the air suction hole 303.

[0066] Among them, the upper plate 6 and the lower plate 7 are located on both sides of the moving path of the air suction hole 303, and both need to be separated from the conveyor belt 302, so they are fixedly installed on the bracket. Since the limit rod 304 is fixedly installed on the side wall of the conveyor belt 302, it may be blocked when passing through the upper plate 6 and the lower plate 7, thereby damaging the device. Therefore, the installation position of the upper plate 6 and the lower plate 7 needs to leave a moving channel for the limit rod 304.

[0067] In a more preferred embodiment, a reflux channel 8 is provided below the upper plate 6 and the lower plate 7 , and the reflux channel 8 is connected to the first corn box 103 .

[0068] It should be noted that the structures that need to be fixed in the above embodiments include the limit members 4, the bin boxes, the reflux channel 8, the arc-shaped spring pieces 2 and the corn conveying device, etc. The brackets, installation and fixing methods are not described in the embodiments and diagrams, but this does not mean that there are no brackets, installation and fixing methods. It is only because the specific structure is arbitrary and related to the structure of the device, so it is not limited in the embodiments.

[0069] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0070] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An electric corn sowing device, comprising a sowing machine and a sowing box located on the sowing machine, characterized in that: It also comprises a bin body, a screening device and a sorting device, wherein the bin body comprises a corn bin (101) with a valve (102) at the bottom, the screening device comprises an arc-shaped spring piece (2) arranged below the corn bin (101), the middle part of the arc-shaped spring piece (2) is convex, one end of the arc-shaped spring piece (2) is higher than the other end, a height difference is arranged between the valve (102) and the arc-shaped spring piece (2), a first corn box (103) is arranged outside the lower end of the arc-shaped spring piece (2), and a movable partition (104) is arranged in the middle of the first corn box (103), and the sorting device is used to screen the corn seeds and store them in the sowing box; The sorting device comprises a corn conveying device (3), a plurality of limiting members (4) for selecting the size of corn, and a plurality of second corn boxes (5) installed below the limiting members (4), the bottom of each of the second corn boxes (5) being provided with a solenoid valve, and the seeding box being located below the second corn box (5); The corn conveying device (3) comprises two conveying wheels (301) and a conveyor belt (302) sleeved on the two conveying wheels (301), air suction holes (303) are evenly opened on the side wall of the conveyor belt (302), and the air suction holes (303) are connected to an air pump, and one of the conveying wheels (301) is located in the first corn box (103); A plurality of the limiting members (4) are arranged on both sides of the conveyor belt (302) along the transmission direction of the conveyor belt (302), each of the limiting members (4) is provided with a screening hole (401) for screening corn, and the size of the screening hole (401) gradually decreases along the transmission direction of the conveyor belt (302); The limiting member (4) comprises an upper baffle (402) and a lower baffle (403) which are slidably connected. The upper baffle (402) is fixedly installed. A groove (404) for accommodating the lower baffle (403) is provided at the lower end of the upper baffle (402). A tension spring is provided between the upper baffle (402) and the lower baffle (403). The upper baffle (402) is provided with an upper notch (405). The lower baffle (403) is provided with a lower notch (406). The upper notch (405) and the lower notch (406) are combined to form the screening hole (401).

2. The electric corn seeding device according to claim 1, characterized in that: A guide plate (105) with an adjustable tilt angle is installed at the bottom of the corn bin (101), and the length of the valve (102) is equal to the length of the guide plate (105).

3. The electric corn seeding device according to claim 2, characterized in that: The guide plate (105) is a hollow structure, comprising a top plate (106) and a bottom plate (107); the top plate (106) is provided with a plurality of through holes (108) for the passage of impurities; an opening (109) is provided at the lower end of the bottom plate (107); a guide plate (110) is provided at the lower end of the opening (109); the lower end of the guide plate (110) is located on a side of the arc-shaped spring sheet (2) away from the first corn box (103).

4. The electric corn seeding device according to claim 1, characterized in that: The upper baffle plate (402) is provided with a through hole (407) connected to the groove (404); the upper end of the lower baffle plate (403) is provided with a split tip (408); when the upper baffle plate (402) and the lower baffle plate (403) are matched and installed, the side wall of the split tip (408) is located on one side of the through hole (407); a plurality of limit rods (304) are provided on the conveyor belt (302); the limit rods (304) are installed between two adjacent air suction holes (303); and the limit rods (304) are used to move the lower baffle plate (403) downward through the through hole (407).

5. The electric corn seeding device according to claim 1, characterized in that: The sorting device further comprises an upper plate (6) installed above the conveyor belt (302) and a lower plate (7) installed below the conveyor belt (302), the ends of the upper plate (6) and the lower plate (7) being respectively located on both sides of a moving path of the air suction hole (303), and the upper plate (6) and the lower plate (7) being used to adjust the posture of the corn adsorbed on the air suction hole (303).

6. The electric corn seeding device according to claim 5, characterized in that: A reflux channel (8) is provided below the upper plate (6) and the lower plate (7), and the reflux channel (8) is in communication with the first corn box (103).

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